bluuebunny/crossref_metadata_2025 huggingface dataset:
Student-centred learning and formative assessment: a possible answer to
online language and literature teaching and learning
Authors: Li Miao
Published: May 2022

The University of Calgary transitioned to online teaching in March 2020.
Subsequent months saw instructors working to overcome the personal,
technological, and pedagogical challenges involved in this. Central to those
discussions was the need to increase student engagement and develop
effective assessment formats. Based on student feedback and personal
reflection, the adoption of a synchronous learning environment fostering
student-centred learning and formative assessment was considered appropriate
in the context of online language teaching and learning. It responded to
students’ increased stress levels due to the lack of face-to-face
communication and tackled the issues of student attention span and
engagement, as well as academic integrity. This paper starts with a brief
discussion of factors that affect students’ behavioural patterns and
academic performances during online teaching and learning. It then presents
five activities and assessments used in language teaching and examines the
effectiveness of these activities in improving student engagement and their
retention of course material.
Development of Clinical Milestones in Parkinson’s Disease After Bilateral Subthalamic Deep Brain Stimulation
Authors: Ong Jed Noel A. , Shin Jung Hwan , Jeon Seungho , Lee Chan Young , Kim Han-Joon , Paek Sun Ha , Jeon Beomseok
Published: May 2022

Objective Deep brain stimulation of the subthalamic nucleus (STN-DBS) in Parkinson’s disease (PD) patients does not halt disease progression, as these patients will progress and develop disabling non-levodopa responsive symptoms. These features may act as milestones that represent the overall functionality of patients after DBS. The objective of this study was to investigate the development of clinical milestones in advanced PD patients who underwent bilateral STN-DBS.Methods The study evaluated PD patients who underwent STN-DBS at baseline up to their last follow-up using the Unified Parkinson’s Disease Rating Scale and Hoehn and Yahr scale. The symptoms of hallucinations, dysarthria, dysphagia, frequent falls, difficulty walking, cognitive impairment and the loss of autonomy were chosen as the clinical milestones.Results A total of 106 patients with a mean age of 47.21 ± 10.52 years at disease onset, a mean age of 58.72 ± 8.74 years at surgery and a mean disease duration of 11.51 ± 4.4 years before surgery were included. Initial improvement of motor symptoms was seen after the surgery with the appearance of clinical milestones over time. Using the moderately disabling criteria, 81 patients (76.41%) developed at least one clinical milestone, while 48 patients (45.28%) developed a milestone when using the severely disabling criteria.Conclusion STN-DBS has a limited effect on axial and nonmotor symptoms of the PD patients, in contrast to the effect on motor symptoms. These symptoms may serve as clinical milestones that can convey the status of PD patients and its impact on the patients and their caregivers. Therefore, advanced PD patients, even those treated with bilateral STN-DBS, will still require assistance and cannot live independently in the long run.
Effect of different ramie (Boehmeria nivea L. Gaud) cultivars on the adsorption of heavy metal ions cadmium and lead in the remediation of contaminated farmland soils
Authors: Zhu Shoujing , Shi Wenjuan , Zhang Jian
Published: May 2022

Heavy metal ions, including cadmium (Cd) and lead (Pb), are serious pollutants in farmland soils. The effective removal of heavy metals is an important task in soil remediation. This study aimed to evaluate the ability of seven ramie (Boehmeria nivea L. Gaud) cultivars to remove heavy metals. Results showed that the seven ramie varieties grew well in Cd and Pb polluted soils. The aboveground biological tissues and raw fiber yield of “Zhongzhu1” were 20.71 and 24.61 Mg ha−1 per year, respectively, which were significantly higher than those of the six other varieties. Cd levels in each ramie part can be arranged as husks > root > stem bone > leaf > raw fiber, while Pb levels in each ramie part can be arranged as root > leaf > husks > stem bone > raw fiber. The Cd content in the shoots of “Zhongzhu1” was 19.89 mg kg−1, and the Pb content of the aboveground shoots of “Shiqianzhugenma” was 9.41 mg kg−1. The extraction efficiency of Cd in “Zhongzhu1” was greatly higher than those of the six other varieties. The extraction efficiency of Pb was similar in all varieties. Our observations suggest that ramie can be used to remove toxic ions (Cd and Pb). This study provides a new understanding of planting ramie for heavy metal removal from contaminated soils.
Crystal structure of 1,2-bis(2,4-dinitro-1H-imidazol-1-yl)ethane – dimethylformamide (1/1), C11H13N9O9
Authors: Jun Yuan , Bingheng Wu , Yong Wang , Jianlong Wang , Duanlin Cao , Lizhen Chen
Published: May 2022

C11H13N9O9, triclinic,

P

1
‾

$P\overline{1}$

(no. 2), a = 8.6588(3) Å, b = 8.7538(3) Å, c = 11.7312(4) Å, α = 78.230(1)°, β = 82.060(1)°, γ = 76.031(1)° V = 841.05(5) Å3, Z = 2, R

gt
(F) = 0.0376, wR

ref
(F
2) = 0.1006, T = 150.0 K.
Syncopation and Groove in Polyphonic Music
Authors: Sioros George , Madison Guy , Cocharro Diogo , Danielsen Anne , Gouyon Fabien
Published: May 2022

Music often evokes a regular beat and a pleasurable sensation of wanting to move to that beat called groove. Recent studies show that a rhythmic pattern’s ability to evoke groove increases at moderate levels of syncopation, essentially, when some notes occur earlier than expected. We present two studies that investigate that effect of syncopation in more realistic polyphonic music examples. First, listeners rated their urge to move to music excerpts transcribed from funk and rock songs, and to algorithmically transformed versions of these excerpts: 1) with the original syncopation removed, and 2) with various levels of pseudorandom syncopation introduced. While the original excerpts were rated higher than the de-syncopated, the algorithmic syncopation was not as successful in evoking groove. Consequently, a moderate level of syncopation increases groove, but only for certain syncopation patterns. The second study provides detailed comparisons of the original and transformed rhythmic structures that revealed key differences between them in: 1) the distribution of syncopation across instruments and metrical positions, 2) the counter-meter figures formed by the syncopating notes, and 3) the number of pickup notes. On this basis, we form four concrete hypotheses about the function of syncopation in groove, to be tested in future experiments.
En búsqueda del aprendizaje perdido. Una fábula educativa en tiempos de pandemia
Authors: Eslava Castañeda Edgar Gustavo
Published: May 2022

El texto analiza algunas de las propuestas que las agencias internacionales más directamente relacionadas con el sector educativo han ofrecido a fin de afrontar las situaciones creadas por la pandemia de covid-19 y reactivar la educación en condiciones similares, o al menos comparables, a las que se encontraba antes de pandemia. A partir de ese análisis, se trazan conexiones entre las agendas educativas, políticas y económicas que enmarcan las respuestas actuales en términos de mediciones, evaluaciones e inversión de recursos y tiempos. Al cierre, despejadas algunas dudas y aclaradas algunas decisiones, se toma distancia frente a las estrategias sugeridas por los organismos multilaterales, y se les ve desde una perspectiva que hace énfasis en las personas y las comunidades, antes que en los sistemas y en el comercio de datos, para sacar conclusiones que permitan repensar las direcciones en las que las acciones han de apuntar.
La enseñanza de la filosofía en el nivel secundario en Argentina: contextos socio-histórico-políticos
Authors: Morales Laura , Bedetti María Belén
Published: May 2022

El artículo presenta una lectura sobre la enseñanza de la filosofía en el nivel secundario de la República Argentina. A tal fin, se hace una periodización a partir de aspectos del contexto socio-histórico-político considerados centrales por su impacto sobre esta y de las normativas que la regularon. Este análisis de la historia nacional —desde mediados del siglo XIX a la actualidad— se sustenta en la concepción de que la enseñanza de la filosofía solo es posible desde una situacionalidad y que, por un lado, la omisión de la misma no hace más que desconocer la complejidad que aporta cada contexto a esta tarea y, por otro, habilita a pensar las condiciones actuales como instancias de un proceso mucho más amplio.
CONTROL STRATEGIES TO ELIMINATE HARMONICS IN POWER GENERATION SYSTEMS BASED ON A DOUBLY-FED INDUCTION GENERATOR
Authors:   Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine, Shapoval I.A. , Mikhalsky V.M. ,   – Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine, Artemenko M.Yu. ,   – National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute",  pr. Peremohy, 37, Kyiv, 03056, Ukraine, Chopyk V.V. ,   – Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine, Polishchuk S.Y. ,   – Institute of Electrodynamics of the National Academy of Sciences of Ukraine,  pr. Peremohy, 56, Kyiv, 03057, Ukraine
Published: May 2022

The variable speed power generation system based on a doubly-fed induction generator is the most popular in the wind industry. The stator is connected directly to the mains in such a generator, while the rotor is connected to the mains via a semiconductor converter. Low electric power quality increases energy and economic losses, leading to operational problems of production. Many publications discuss improving the electric power quality, particularly methods for eliminating harmonics for a power generation system based on a doubly-fed induction generator. Critical evaluation is needed to choose a method of eliminating harmonies for a particular case. The article presents an overview of different control methods for harmonic elimination in power generation systems based on a doubly-fed induction generator. Various strategies are used, which are used both in autonomous systems and in the mode of connection to the network. During the review of control methods for harmonic elimination, their different characteristics were noted, and the ad-vantages and disadvantages of each method were considered. Ref. 53, fig. 6.
A Pilot Study of Patient Photographs and Handoff Communication
Authors: Hughes Helen K , Zhang Laetitia X. , Psoter Kevin J. , Smith Brandon M. , Kim Julia M. , Tschudy Megan M. , MPH MD , Serwint Janet R.
Published: May 2022

BACKGROUND AND OBJECTIVES

Safe and effective handoffs have become a national priority. Given that patient photographs have been associated with safety benefits in other settings, we hypothesize they could improve handoff communication. Our objective was to determine whether patient photographs used during simulated handoffs improves information retention, response to clinical scenarios, and familiarity with patients, compared with simulated handoffs without photographs.

METHODS

We conducted a pilot mixed-methods study using simulated handoff sessions with pediatric residents. One investigator simulated 2 verbal handoff sessions with participants randomized to receive stock patient photographs in either the first or second session. Participants answered an online questionnaire after each session to assess information recall and familiarity with patients. Primary outcomes included percent correct responses and response time. Participants were interviewed to assess the benefits and challenges of using photographs in handoffs.

RESULTS

Forty pediatric residents participated. Correct responses and response time did not differ significantly between sessions. Participants indicated less confusion and more comfort caring for patients after photograph handoff sessions. All participants identified benefits to using patient photographs and 75% identified challenges. Benefits included assisting memory, enhancing connection with patients, and improving patient safety. Challenges included visual distraction, bias concerns, and patient privacy.

CONCLUSIONS

In this pilot study, patient photographs did not result in improved information retention or efficiency of response to clinical scenarios but were associated with perceptions of reduced confusion and enhanced comfort. Participants identified benefits and challenges of incorporating photographs in handoffs that could inform use in real-world settings.
Transcranial electrical stimulation of dorsolateral prefrontal cortex in substance use disorder therapy
Authors:   SWPS Uniwersytet Humanistycznospołeczny, Warszawa, Polska, Garnier Justyna
Published: May 2022

There is a growing interest in therapeutic applications of non-invasive brain stimulation methods. Transcranial electrical stimulation is a non-invasive brain stimulation method used to modulate central nervous system excitability. The procedure involves placing two electrodes on the patient’s head through which very low-intensity electrical current is sent. Transcranial electrical stimulation methods include transcranial direct current stimulation and transcranial alternating current stimulation. These methods are considered to be safe and relatively inexpensive, and can be used in home settings. Research conducted in recent years suggests that transcranial electrical stimulation can be applied to support substance use disorder therapy. The positive effects of stimulation include decreased craving and frequency of substance use, an improved quality of life and changes in the activity of functional brain networks. Transcranial direct current stimulation with the anode being placed over the right dorsolateral prefrontal cortex and the cathode being placed over the left dorsolateral prefrontal cortex is considered to be of a particularly high therapeutic potential. There are a limited number of studies which indicate that not only direct current stimulation, but also alternating current stimulation can be used for substance use disorder therapy.
Scrupulosity – cognitive-behavioural understanding of religious/moral obsessive-compulsive disorder
Authors:   Mocni w Duchu, Dom Miłosierdzia – Psychotherapy, Łódź, Poland, Albińska Paulina ,   Independent Public Healthcare Centre, Teaching Hospital of the Medical University of Lodz, Łódź, Poland
Published: May 2022

The paper focuses on the problem of scrupulosity in the context of cognitive-behavioural therapy. The disorder has long aroused the curiosity of both psychologists and theologians. Advances in clinical psychology have directed the attention of researchers and therapists to the aetiology and nosological classification of this psychological/moral phenomenon. For many years, the variety of psychological approaches and the ambiguities of treatment strategies have aroused controversy, with treatment outcomes considered only negligible, resulting in scepticism among patients. The change was brought about by the conceptualisation of the disorder in the cognitive-behavioural paradigm. This paper briefly discusses the evolution of therapeutic models and techniques used in patients diagnosed with scrupulosity. Reference was made to the epidemiology of the phenomenon in the context of its place in the group of obsessive-compulsive disorders. The changes in the conceptualisation of problems experienced by scrupulous individuals are also presented, taking into account the cognitive-behavioural models of an obsessive-compulsive disorder, the subtype of which is nowadays scrupulosity, most often cited in psychological-medical literature. The cognitive-behavioural model of the disorder, which is not widely discussed in Polish literature, and its implications for clinical practice, as well as modifications in the standard protocol for treating patients diagnosed with obsessivecompulsive disorder, introduced to adjust for the needs of patients presenting with the moral-religious aspect of the disease, are also discussed. The aim of the article is also to promote knowledge about scrupulosity among therapists, priests and scientists, thereby inspiring creative work and improvement of the quality of everyday functioning of patients.
Selective mutism – symptomatology and predisposing factors in children
Authors: Kos Ewa Arleta
Published: May 2022

The paper discusses the issue of selective mutism, which is an anxiety disorder. Literature analysis shows that studies on selective mutism, i.e. an individual’s failure to speak in specific social situations, are missing, especially in Polish psychological and educational literature. The paper presents mainly data on the epidemiology and aetiology of selective mutism, emphasising the need to initiate therapy as soon as possible after the diagnosis. According to epidemiological data, the number of children with selective mutism is growing. This prevents educational success, and, above all, emotional and social development. Unfortunately, symptoms indicative of selective mutism are very often underestimated or confused with other developmental problems. It should be emphasised that early and accurate diagnosis is very important as selective mutism can give rise to social anxiety, depressive disorders and many other problems. The paper describes the diagnostic specifiers of selective mutism and the current trends in explaining some of the causes of the disorder, especially in the context of polyvagal theory and the concept of Bar-Haim and Henkin (with the focus placed on the aspects that are rarely cited in the literature). The disorders and difficulties usually associated with selective mutism are also mentioned. We expect that the paper will contribute to the reflection on the need to develop effective protocols to properly manage the disorder and eliminate its effects. Our literature review shows that empirical studies on the efficacy of selective mutism therapy in children and adolescents are still missing.
Design and Simulation of a Circadian Lighting Control System Using Fuzzy Logic Controller for LED Lighting Technology
Authors:   School of Housing, Building & Planning, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia, Perumal Sivachandran R. , Baharum Faizal ,   School of Housing, Building & Planning, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia
Published: May 2022

This paper introduces a fuzzy logic-based circadian lighting control system using flexibility of Light-Emitting Diode (LED) lighting technology to synchronise artificial lighting with circadian (natural) lighting Correlated Colour Temperature (CCT) characteristics. Besides for vision acuity, the Non-Imaging Forming effects of lighting affect human circadian rhythms. Past works in spectrally tuning CCT or Spectral Power Distribution of lighting have used conventional Proportional-Integral-Derivative (PID) control system architecture, where the modelling process of system transfer functions was mathematically complex, especially for nonlinear systems. A methodology of regulating lighting CCT is employed in a 7×5 fuzzy logic rules matrix in a Fuzzy Logic Controller (FLC) system, to closely replicate natural lighting CCT characteristics for indoor lighting. A reference lookup table was devised to store desired CCT values arbitrarily with respect to time mark in a day, which acts as an outdoor circadian stimulus and guides the FLC. The FLC compensates for the lack of CCT in lighting space. Simulation results show acceptable CCT output values conforming to circadian lighting parameters at a time in a day compared to the lookup table targets. Deviation from blackbody curve was within ±0.003 using CCT Duv checking. The system did not produce an overshoot (0.0%) with a steady state (zero error) reached after the fourth iteration. Also, rise time was calculated to be 1 iteration. This approach could be further enhanced to cater for additional custom needs in many built environments. Future works may consider connecting more sensors to capture real-time outdoor CCT values for practical regulation.
The Osteoinductive Potential of Partially Demineralized Bone Matrix and the Possibility of Its Use in Clinical Practice
Authors: Pankratov Alexander S. , Fadeeva Irina S. , Yurasova Yulia B. , Grinin Vasily M. , Cherkesov Igor V. , Korshunov Vasily V.
Published: May 2022

Today autografts are considered to be an optimal material for bone grafting. However, the collection of material and its clinical use is associated with several serious drawbacks, and therefore, in reconstructive surgery, a search for alternative treatment approaches is being conducted. A bone transplant from another person (allo-osteoplasty) is the most natural and logical option for replacing an autobone. Since 1965, allogeneic implants of a partially demineralized bone matrix combining osteoinductive and osteoconductive action have been used in clinical practice. However, the clinical results of the use of this material turned out to be ambiguous, which is due, first of all, to the significant variability of the osteoplastic potential of its various samples. For this reason, in clinical practice, sometimes preference is given to samples of non-demineralized allobone, which retain its structure longer. In this paper, we consider factors affecting the osteoinductive activity of a partially demineralized bone matrix, related both to the technological issues of its preparation and to the clinical conditions of use. Issues of the possible improvement of this material were discussed with a view to its further use in medical practice.
PERFIL EPIDEMIOLÓGICO DE TUMORES INTRACRANIANOS METASTÁTICOS SUBMETIDOS À NEUROCIRURGIA
Authors: Buffon Viviane Aline , Conti Bruna Passos , Beltrame Carolina Madsen , Sobral Ana Cristina Lira , Simm Eduardo Bolicenha , Bark Samir Ale
Published: May 2022

Introdução: As metástases cerebrais são, geralmente, decorrentes de carcinoma pulmonar, mama e melanoma. A procura ao hospital por sintomas neurológicos sem o conhecimento prévio do câncer primário é frequente. Objetivos: Analisar o perfil epidemiológico dos pacientes com metástase cerebral. Método: Trata-se de um estudo transversal, com coleta de dados dos pacientes com metástases cerebrais entre 2010 a 2020. Resultados: A amostra foi de 114 pacientes e os principais sítios primários foram pulmão (39%), sítio não determinado (25%) e melanoma (15%). A maior parte (61%) desconhecia o câncer primário. O local mais acometido foi lobo frontal (32%), do lado direito (41%), e a maioria das lesões eram únicas (68%). Conclusão: A análise epidemiológica corroborou com grande parte dos achados na literatura, sendo o sítio primário pulmonar e a descoberta da metástase antes do câncer primário a maioria dos casos.
Two Interpretive Postures and Two Kinds of Friendship in Mughal Commentaries on Sa‘dī's Gulistān
Authors: Keshavmurthy Prashant
Published: May 2022

This essay makes a case for the centrality of premodern Persian literary criticism to understanding Islamic virtue ethics as a world tradition of civility. It argues that this body of criticism took the form of two distinct if overlapping interpretive postures, the charismatic-allegorical and the humanist-philological, and that these two postures assumed and furthered two forms of friendship: a vertical form of Sufi hierarchy and a horizontal form of humanist-philological tutelage. Pointing to the centrality of both kinds of friendship to the urban settings in which Islamic virtue ethics has situated itself, it then sets forth how these presupposed models of friendship conditioned literary commentary by considering representative passages from three Mughal commentaries on Sa‘dī's canonical The Rose Garden of 1258. It closes by expanding on its opening remarks on the relations between metaliterary discourse and virtue, speculating on the ethical limits of this body of Persian literary criticism in relation to the modern practice of critique.
Risking lives for living: a study on underwater fishing in the Padma River, Bangladesh
Authors: Parvez Md. Taskin , Chaki Nipa , Mohsin ABM , Galib Shams M.
Published: May 2022

Different types of fishing methods and gears are being employed across the globe including Bangladesh. This study describes the underwater fishing method in the Padma River- one of the three largest rivers in Bangladesh. Standardised efforts have been made for collecting data of interest between September 2016 and May 2017. Two types of underwater fishing, with or without using oxygen cylinders, were recorded. Mean duration of fishing per effort was higher (by 382%) when fishermen used oxygen cylinders. Mean water depth of fishing sites was also higher when oxygen cylinders were used. Three species of finfish (Rita rita, Sperata seenghala and Labeo calbasu) and one freshwater prawn species (Macrobrachium dayanum) have been identified in the catch. The catch was dominated by M. dayanum in both fishing types (27 ± 9.3 [with oxygen] and 15 ± 5.2 [without oxygen]). However, all the number of caught fish species varied significantly among different sampling months in both fishing methods (P < 0.001) except L. calbasu in fishing with oxygen cylinder. A number of health issues of the fishermen were also recorded.
Fishes of the river Padma, Bangladesh: Current trend and conservation status
Authors: Joadder Md. Abdur Razzaq , Galib Shams Muhammad , Haque Sk Md. Mohaimenul , Chaki Nipa
Published: May 2022

The Padma River is one of the longest rivers and it is believed to be an important spawning and feeding ground for riverine fish species of Bangladesh. This study was conducted from February 2013 to January 2014 and with a view to revealing the diversity of fish fauna in the river. A total of 71 species were recorded belonging to 10 orders, 26 families and 54 genera. The most dominant fish order was Cypriniformes contributing 28 species in 16 genera. Cyprinidae was most dominant family contributing 23 species in 16 genera. Four alien species were found. Twenty eight species have been considered threatened by IUCN Bangladesh. These fishes were belonging to the following categories, Vulnerable (13%), Endangered (18%) and Critically Endangered (8%). Comparing the results with the previous findings, it was revealed that the species diversity have declined in the Padma River over time. Considering all the findings it is concluded that the Padma River could be considered a refuge for conservation of threatened freshwater fishes of Bangladesh. The conservation efforts should ensure minimization of anthropogenic impacts, especially the fishing pressure and introduction of alien invasive species.
A review on Labeo calbasu (Hamilton) with an emphasis on its conservation
Authors: Gupta Sandipan , Banerjee Samir
Published: May 2022

Labeo calbasu is a freshwater fish species and is the most important carp species next to three Indian Major Carps Labeo rohita, Catla catla and Cirrhinus mrigala. It is a popular food fish and also is admired as a sport fish. Recently this fish species has also made its entry in ornamental fish markets of India and abroad. In last few years, the natural populations of this fish species has seriously declined due to over fishing and other anthropological reasons. In India it has been reported as Lower Risk near Threatened and in Bangladesh as endangered species. Earlier number of works has been conducted on different aspects of Labeo calbasu including food and feeding habit and reproductive biology. This report has been prepared with a view to sum up all those previously documented information along with pointing out the missing information further study of which will be beneficial for its fishery. Apart from this, it has been tried to note down some possible measures which should be considered for its conservation.
Fisheries exploitation of the Halda River, Bangladesh
Authors: Arshad-Ul-Alam Mohammad , Azadi Mohammad Ali
Published: May 2022

Fish exploitation of the Halda River was investigated for two years period from January 2007 to December 2008 to know the variation of CPUA (Catch Per Unit Area kg.ha-1year-1) among the three studied sections, months and between two years. The mean CPUA for pooled data was 295.685, 433.219, 524.449 and 411.887 kg.ha-1year-1 for the year 2007 and 415.987, 636.808, 566.515 and 527.545 kg.ha-1year-1 for the year 2008 in upstream (section 1), midstream (section 2), downstream (section 3) and over the total study area of the River Halda respectively. Analysis of variance showed highly significant difference of CPUA among gears and months. No significant difference of CPUA was observed among sections. Combined CPUA during 2008 observed higher and statistically significant than previous year.
Size at first maturity and maturity stages of Terapon jarbua (Forsskal, 1775) from Pondicherry Coast, India
Authors: Nandikeswari R
Published: May 2022

Size at first maturity of Terapon jarbua was studied based on 114 male (14 to 28 cm in TL) and 140 female (14 to 32 cm in TL). The Logistic curves describing the relationship between the sexes and the proportion of 50% maturity (Lm50) were estimated at 20.8 cm in male and 21.8 cm in female of Terapon jarbua. The male reached 50% first sexual maturity at smaller lengths than female in this species. The gonads were classified into five maturity stages based on the size, colour and texture.  Month wise predominance of different stage of maturity deferred during different months.
Directional preference of European lobster (Homarus gammarus) movements on the Yorkshire Coast
Authors: Wood James Michael
Published: May 2022

Recaptures of 838 tagged Homarus gammarus individuals identified a directional preference, with bearings from release to recapture concentrated along a North-West to South-East axis, aligning with the predominant current direction for the study site.
Microbiological assessment of Nile tilapia Oreochromis niloticus collected from different super shops and local market in Dhaka, Bangladesh
Authors: Sarkar Shilpi , Dey Shuvra Kanty , Nipu Md. Ashraful Islam , Brishti Parsha Shanjana , Billah Md. Baki
Published: May 2022

The present study was conducted to detect the bacterial contamination of Nile tilapia Oreochromis niloticus collected from super shops and local market of Bangladesh. The sample specimens were collected from three super shops in Dhaka city viz. Agora, Shwapno and Prince Bazar and one local market (Savar Bazar). Samples were analysed to determine some pathogenic bacterial genera through the isolation and enumeration from different organs. The isolates were identified as Escherichia coli, Salmonella spp., Shigella spp. and Vibrio spp. by conventional culture method, biochemical tests and PCR assay. Total Viable Bacterial Counts (TVBC) were also determined. Fishes were found to be contaminated within a range between 6×104 to 1.6×106 cfu g–1. The load of E. coli and Shigella spp. were higher than that of Salmonella spp. and Vibrio spp. in all the studied samples. The study concludes that more precautions are required for personnel hygiene during fish processing and handling in order to prevent assemblage of pathogenic bacteria in super shops as well as local fish markets of Bangladesh.
New estimates and complications in the assessment of female functional maturity for the European lobster (Homarus gammarus) on the Yorkshire Coast (UK)
Authors: Wood James Michael
Published: May 2022

New estimates of female Homarus gammarus functional maturity were developed from targeted offshore and quayside based industry surveys in the Yorkshire Coast fishery. Offshore surveys also provided the first stock specific quantification of pre-recruit contributions. A contrast in results identified a new complication in estimating functional maturity attributed to ‘soft’ animal exploitation which is reviewed and assessed.
Prevalence of white spot virus and monodon baculovirus in shrimp culture systems of West Bengal, India
Authors: Abraham Thangapalam Jawahar , Mondal Anjan , Patra Avijit , Adikesavalu Harresh
Published: May 2022

The global shrimp aquaculture is impacted by episodes of viral diseases resulting in huge income losses. This communication presents the results of the polymerase chain reaction (PCR) based surveillance of white spot virus (WSV) and monodon baculovirus (MBV) in shrimp culture systems of West Bengal, India. The WSV was detected in 14.87% of the total samples (N = 121) by first PCR and 16.53% of samples by nested PCR. The WSV infection was noticed in 12 of 65 Penaeus monodon, 6 of 39 Litopenaeus vannamei and 2 of 11 Macrobrachium rosenbergii samples. The MBV was detected in 8 of 65 P. monodon samples by non-nested PCR and all were also positive for WSV, thus indicating concurrent infection of shrimp. The results emphasized the need to observe strict quarantine measures during the seed selection to prevent the introduction of viral pathogens in grow-out systems.
Inclusion of cricket (Gryllus bimaculatus) meal in African catfish (Clarias gariepinus) feed influences disease resistance
Authors: Taufek Norhidayah Mohd , Simarani Khanom , Muin Hasniyati , Aspani Firdaus , Raji Ameenat Abiodun , Alias Zazali , Razak Shaharudin Abdul
Published: May 2022

In our present study, we observed the effect of cricket meal (CM) on disease resistance of African catfish. Fish were fed diets containing 350 g kg–1 and 400 g kg–1 of CM and 350 g kg–1 of fishmeal as control. The fish were divided into triplicates treatments of ten fish per replicate, weighed 22.5±0.6 g and fed with experimental diets for 40 days before being challenged against Aeromonas hydrophila. Relative percentage of survival (RPS) was recorded over 12 days post-challenge. White blood cell count, total protein, globulin and lysozyme showed significantly increasing levels in those fed with cricket meal diet compared to the control group. Mortalities at 12-day post-challenge significantly decreased to 30% (RPS: 66.7%) and 27% (RPS: 70%) for 35% and 40% CM respectively compared to 90% mortality in control group. Intestines and liver tissues of infected fish were dissected for pathogenic confirmation. The intestines of control diet showed the highest bacterial load (58.2×107 cfu g–1) compared to CM diets. The current study indicates that dietary CM could enhance the innate immune system and disease resistance of African catfish.
Quality and shelf life of vacuum- and nitrogen-packed dried barb fish (Puntius spp.)
Authors: Chowdhury Paromita , Rahman Masudur , Jahan Syeda Nusrat , Flowra Fawzia Adib , Islam Md Tariqul
Published: May 2022

Vacuum and modified atmosphere packaging are widely used for preserving food items including fish. In this context, the quality and shelf life of air- (control), vacuum- and nitrogen-packed dried barb fish (Puntius spp.) stored at ambient temperature were evaluated through biochemical and microbial analyses for 90 days. In most of the storage days, significantly lower values of moisture, total volatile base-nitrogen (TVB-N) and peroxide value (PV) were observed in the vacuum pack sample compared to control. However, the TVB-N, PV, total coliforms and faecal coliforms counts were within the acceptable limit in all groups. The total plate count (TPC) increased gradually with time from an initial value of 4.29 log CFUg–1. However, compared to control, significantly lower TPC were found on and after the 30th day of storage in vacuum and nitrogen pack samples. Considering the TPC value of 5 log CFUg–1, the shelf life was determined at approximately 15 days for control, 35 days for nitrogen pack and 45 days for vacuum pack samples. Therefore, the vacuum pack is considered the best packaging, which may be utilised by the processors to produce and retail the dried products with prolonged shelf life.
Population structure and shell dimension of the invasive veined whelk (Rapana venosa)
Authors: Kasapoğlu Nazlı
Published: May 2022

The veined whelk (Rapana venosa) is a widely known invasive species in the Black Sea. This species exerts negative impacts on the Black Sea ecosystem including destruction of bivalve, mussel and oyster populations. This study aimed to examine population structure using the length-frequency distribution and shell dimensions of R. venosa, collected from the Black Sea. A total of 506 specimens were collected from the Trabzon Coast and classified into 6 age groups using the Bhattacharya method. The Von-Bertalanffy growth parameters were calculated as L∞ = 10.29 cm, k = 0.09, t0 = 1.25 yr–1. The mortality and exploitation rates were estimated as total mortality Z = 0.51 yr–1, fishing mortality F = 0.31 yr–1, annual mortality M = 0.20 yr–1 and exploitation rate E = 0.60 yr–1. This study will help understanding the growth of R. venosa and its management.
Morphometric and meristic comparison of local and Thai Anabas testudineus
Authors: Ara Ismot , Nabi Md. Rafiqun
Published: May 2022

Local and Thai climbing perch, Anabas testudineus are locally known as koi in Bangladesh. These two are important natural and cultured fish. This study was carried out the comparative investigations on morphometric and meristic of local and Thai A. testudineus.  Both the varieties were collected from different fish markets in and around Savar. The morphometric characteristics were higher in Thai koi than local and among them; total length, standard length (SL), length of 1st and 2nd dorsal fin bases, length of 1st and 2nd anal fin bases, abdominal regional length were found different. Proportion of SL and head length (HL), HL and snout length, SL and caudal peduncle length were different between the two varieties. Among the meristic characteristics; number of dorsal spines, dorsal fin rays, anal spines, scale on upper lateral line were found difference between local and Thai koi. The body spots and the colour at pelvic fin region were also different. The present study suggested that local and Thai koi are morphometrically and meristically different in many aspects.
Quality changes in sea grape, Caulerpa lentillifera at different brine concentrations
Authors: Tolentino Precious Dee H. , Sorio Jerson C.
Published: May 2022

Sea grapes are among the seaweeds being commercialized in the Philippines. They are sold in fresh state, and are highly perishable. It is necessary to develop preservation techniques in order to lengthen its shelf life. This study aims to assess the physico-chemical, microbial and sensorial quality of sea grape Caulerpa lentillifera preserved in 0%, 5%, 10% and 15% brine concentrations. Results revealed that brining effectively extended the shelf life of C. lentillifera by inhibiting the growth of bacteria and maintaining the osmotic pressure between the product and the solution. Within the 10 days storage period, 10% and 15% were bacteriologically stable and more acceptable upon rehydration. Treatments 0% and 5% were not acceptable because it exceeded the bacterial limit set for fresh vegetables. The sensorial attributes were compromised and became less acceptable due to degradation through bacterial action. In terms of physico-chemical analysis, high salt concentration (15%) decreased chlorophyll and carotenoid content significantly due to shrinkage and water loss. Overall, this study proved that sea grapes in 10% brine solution can extend its shelf life.
Impacts of water regulation on Tenualosa ilisha in the Narmada Estuary, Gujarat, India
Authors: Bhakta Dibakar , Meetei Wakamban Anand , Vaisakh Gopinathan , Das Sanjoy Kumar , Manna Ranjan Kumar
Published: May 2022

Hilsa is a highly prestigious fish for esteemed delicious taste, high market demand and price. It forms an important fishery of funnel-shaped 72 km long Narmada Estuary. Rapid decline in hilsa catch has been recorded in the Narmada Estuary over last few decades. Hilsa catch was recorded 5180 ton in 2006–07 that reduced to only 419 ton in 2014–15. Pre-impoundment of dam showed that T. ilisha contributed to the tune of 977.1 to 3727 ton from 1974–75 to 1982–83 and the highest catch of hilsa was 15319 ton during 1993–94. Sardar Sarovar Dam started functional in the year 1994 which has impacted natural water flow of the river and resulted in a reduction of freshwater availability in the estuary; the development of sand bars at the mouth of the estuary also reduced the tidal ingress into the system; low depth, loss of breeding, nursery and feeding grounds, over fishing may be the most important factors affecting hilsa fishery in Narmada estuary. Catching of juvenile hilsa during winter by ‘Golava’ net (small meshed bag net) also led to a rapid decline in hilsa catch.
Toxic effect of lead on the fingerlings of Cirrhinus mrigala (Hamilton, 1822)
Authors: Palazhy Sabitha , Thomas Joseph Kalathiparambil , Sivadasan Shibu
Published: May 2022

Pollution of water bodies caused by heavy metals such as lead is a major problem affecting aquatic fauna. The effect of lead on the fingerlings of fishes has not been widely investigated. The present study was undertaken to evaluate the impact of heavy metal lead on the fingerlings of the freshwater fish, Cirrhinus mrigala. Different concentrations of lead nitrate solutions, viz., 1 ppm, 10 ppm, 40 ppm, 100 ppm, 120 ppm, 160 ppm, 200 ppm, 240 ppm, 300 ppm, 400 ppm and 500 ppm were prepared. Ten fingerlings were introduced into each concentration. The mortality rate and the time of survival of fingerlings in the lead nitrate solution during next 96 hours were recorded. The mortality rate increased to a sudden plateau from 100 ppm to 200 ppm (from 10% to 100%) and total mortality was attained at 200 ppm. LC50 for the fingerlings was found to be 160 ppm. There was almost instantaneous mortality – absolute intolerance – of the fingerlings at 500 ppm. Our study results show that the fingerlings of Cirrhinus mrigala can survive the toxic effect of lead nitrate up to 40 ppm, without physiological stress.
New host and geographical record of Eudactylina pusilla Cressey, 1967 from Indian waters with DNA barcodes
Authors: Divakar Pradeep Hosahalli , Sasidharan Venu , Kumar Ravi Ranjan , Gopalakrishnan Sumitha , Kara Bineesh Kinattum , Farejiya Mahesh Kumar
Published: May 2022

The present paper reports the first record of the parasite Eudactylina pusilla Cressey, 1967 from the gills of the pelagic thresher shark, Alopias pelagicus Nakamura, 1935 collected during a multifilament longline operation at a depth of 762 m from Indian EEZ around Andaman Islands. The occurrence of this copepod gill parasite on A. pelagicus in the Indian waters constitutes new host record and extends the parasite’s known geographical distribution, thus contributing to the knowledge of biodiversity of the parasitic copepods in Indian waters. Molecular marker based taxonomical annotation using Mitochondrial 18S r DNA sequencing also confirmed the identity of the E. pusilla specimen.
Length-weight relationship and condition factor of Tade gray mullet, Chelon planiceps (Valenciennes, 1836) from Hooghly-Matlah Estuary, West Bengal, India
Authors: Pramanick Soumendra , Das Sudhir Kumar , Bhakta Dibakar , Johnson Canciyal
Published: May 2022

Tade gray mullet (Chelon planiceps) forms a lucrative fishery in the Hooghly-Matlah estuarine system. During eight months of investigation 232 specimens were examined to study length-weight relationship and relative condition factor (Kn). The length and weight of fish was varied from 41 to 283 mm and 0.81 to 208 g respectively. Two length-weight relationship equations were obtained from the analysis, W=0.0000397L2.952 for <187 mm size group and W=0.0000406L2.834 for >187 mm size group. The size at first maturity was recorded as 187 mm. The b value was not significantly different from 3 indicating isometric growth. The monthly mean Kn for the male and female were 1.041–1.125 and 1.009–1.236 respectively. The highest Kn value was recorded in July for both the sexes, which may be due to advance maturity stages. The present study will be useful in the context of biological management of mullet fishery as well as to find out aqua-farming potential of Tade gray mullet.
Impact of diseases on fish production of baors in Jessore, Bangladesh
Authors: Dey Bipul Kumar , Hossain Md. Mer Mosharraf , Bappa Sanjoy Banerjee , Akter Shirin , Khondoker Shoumo
Published: May 2022

The study was carried out to assess the impact of diseases on fish production in baors of Jessore district, Bangladesh from March 2012 to January 2013. Studied baors were selected randomly from each sub-district which covered 39.22% of total baors and 71.87% baor areas in Jessore district. All the surveyed baors were affected more or less by various diseases and in 80% baors noticeable production loss occurred almost every year. The main diseases were epizootic ulcerative syndrome (EUS), dropsy, gill rot and fin rot; out breaking time ranged from November to February each year. EUS was recorded in 85% baors whereas other diseases were found in various baors at various percentages: dropsy (75%), gill rot (45%) and fin rot (55%). Conferring to the number of affected fishes, 31.25% were affected by EUS, 37.5% by dropsy, 12.5% by gill rot and 18.75% by fin rot. In the year 2012, 0.513% loss of production has occurred that designated 0.7599 million BDT. Through successful work on disease control and management, production loss may be minimized.
Gonad development and size at maturity of the male mud crab Scylla paramamosain (Forsskål, 1755) in a tropical mangrove swamp
Authors: Islam Md. Sherazul , Kurokura Hisashi
Published: May 2022

The reproductive traits and size at sexual maturity of the male mud crab Scylla paramamosain were investigated in Pak Phanang mangrove swamps, Thailand. Samples were taken seven times from the local middlemen mud crab traders during June 2006 to January 2008. Gonad development was determined based on histological appearance that was classified into three stages: 1) Immature (Spermatogonia), 2) Maturing (Spermatocytes) and 3) Mature (Spermatids and Spermatozoa). Among the sample population, the highest 72% was under gonad development stage I, whereas mature stage III was only 12%. The size at first maturity was estimated by the external allometric growth and histological observation of gonad. The size at which 50% of individuals attain sexual maturity was estimated by the two mathematical models such as probit analysis and logistic curve. The mean size at first sexual maturity and 50% maturation of male S. paramamosain were 96 mm and 109 mm internal carapace width (ICW) which revealed that 88% individuals were immature. The present result suggested that the minimum legal size of male S. paramamosain capture should be >110 mm ICW.
Environment and fish fauna of the Atrai River: global and local conservation perspective
Authors: Chaki Nipa , Jahan Sayka , Fahad Md. Foyzul Hassan , Galib Shams Muhammad , Mohsin A B M
Published: May 2022

The fish fauna of the Atrai River were studied for a period of two years from January 2011 to December 2012. Sampling was carried out by several fishing nets and traps on fortnight basis. A total of 74 fish species belonging to 27 families and 52 genera were recorded. Cyprinidae was the most dominant family contributing 18 species in 9 genera. Two alien species were found- Hypophthalmichthys molitrix and Hypostomus plecostomus. Thirty locally threatened species (Vulnerable 13.51%, Endangered 18.92% and Critically Endangered 8.11%) were recorded. But, no globally threatened species was found. Relative abundance of majority 36.49% species was rare. Global population trend of 24.32% recorded fish species was Declining. The highest number of species (42) was recorded in the November 2011. Whereas, the lowest the number of fish species (12) recorded in June and August 2011. Very high correlation was found between fish species and physical environmental parameters (air temperature, water temperature, and water transparency). This study concluded that Atrai River could be an excellent place for natural conservation of fish species. Nevertheless, efforts to maintain a sustainable fishing pressure, removal of existing alien species and avoiding further introduction of such species are recommended.