bluuebunny/crossref_metadata_2025 huggingface dataset:
Phytoplankton diversity of the Gharni Reservoir in Latur district, Maharashtra, India
Authors: Sakhare Vishwas Balasaheb , Chalak Ashvini Dnyandeo
Published: May 2022

The phytoplanktonic samples were collected from the Gharni Reservoir of Latur district of Maharashtra for a period of one year, from June 2013 to May 2014. Totally 18 species of phytoplankton belonging to different taxonomic groups were identified. Among these 7 species belong to Chlorophyceae, 5 species to Cyanophyceae, 3 species to Bacillariophyceae and 3 species to Euglenophyceae. The phytoplankton productivity fluctuated seasonally and the maximum number of 560 units/liter was recorded during month of February and March and minimum number of 95 units/liter during the month of September.
Efficiency of fishing gears in the river Halda, Chittagong, Bangladesh
Authors: Arshad-Ul-Alam Mohammad , Azadi Mohammad Ali
Published: May 2022

To determine the catch efficiency of fishing gears, catch per unit effort (CPUE) data were collected for two years during January 2007 to December 2008 from the river Halda. Analyses were done to examine the variation of CPUE among gears, studied sections, months and years. The mean CPUE for pooled data of all gears was 2.247±0.265 kg.gear-1day-1 and 2.697±0.355 kg.gear-1day-1 for 2007 and 2008 respectively. Among eight gear categories, bag nets yielded the highest CPUE during 2007 (5.957±0.704 kg.gear-1day-1) and seine nets during 2008 (7.288±1.477 kg.gear-1day-1). Among 31 gear types, small meshed bag nets yielded the highest CPUE (18.065±6.660 and 15.69±4.479 kg.gear-1day-1 during 2007 and 2008 respectively). CPUE was highest during March-April and September-November periods. Analysis of variance showed significant difference among catch rates of different fishing gears. The CPUE differed significantly among different months for net fence, gill net, cast net and scoop net during 2007; and for seine net, net fence, bag net and cast net during 2008.
Availability of pearl producing marine bivalves in south-eastern coast of Bangladesh and culture potentialities
Authors: Rahman Md. Ataur , Parvej Mohammed Rashed , Rashid Md. Harunor , Hoq Md. Enamul
Published: May 2022

The present study was conducted during September 2014 to July 2015 to identify the pearl bearing bivalves in south-eastern coast of Bangladesh and culture potentialities of marine oyster in captivity based on field investigation. A total of 7 pearl bearing bivalve species were identified in the coast with a salinity of 18-34 ppt, pH 8.1-8.3 and water depth ranged 0.2-2.0 meter in their habitat. From the collected bivalves, most abundant oyster species windowpane oyster, Placuna placenta (Linnaeus, 1758) was reared in fiber glass tanks with seawater for a period of 6 months. During rearing highest survival rate of 88% was observed in T1 with sandy and gravel substratum and lowest survival rate of 78% was found in T2 with muddy substratum.  Average temperature and salinity were varied between 24 °C-25 °C and 21-26 ppt respectively. From the reared oyster, highest 54 nos. small pearls in the month of April and lowest 7 pearls in December from a single P. placenta were obtained. The study proved that pearls can be obtained from the marine oysters in captivity in Bangladesh, and this offers large scale culture potentialities in our coast.
Spatio-temporal variability in hydro-chemical characteristics of coastal waters of Salimpur, Chittagong along the Bay of Bengal
Authors: Talukder Avijit , Mallick Debbrota , Hasin Tasnuba , Anka Ishrat Zahan , Hasan Md Mehedi
Published: May 2022

Diverse seasonal characteristics of hydro-chemical parameters in the coastal zone are significantly related to aquaculture development. In this paper, general water quality condition derived from laboratory analysis from the coastal waters of Salimpur, Chittagong is presented. Samples were collected from onshore and offshore site of two adjacent coastal locations named as North Salimpur (experimental location) and South Kattoli (control) during a monsoon and a dry season spanning 2013-14. The spatio-temporal variability of studied parameters were found as air temperature 26.5-32.5 ˚C, water temperature 23-33 °C, pH 7.1-7.9, DO 4.29-7.11 mg/L, BOD 1.10-3.25 mg/L, salinity 1.6-21 ppt, EC 3.40-35.68 mS/cm, TDS 2.02-21.99 g/L, TSS 0.62-2.76 g/L, transparency 4.5-14 cm, precipitation 64-1992 mm, NO2-N 1.94-2.58 µg/L, PO4-P 0.45-1.84 µg/L, SiO3-Si 130.46-956.31 µg/L during investigation period. Average values of physicochemical parameters were found to be in compliance with standard guidelines. The ship breaking activities near experimental location possess negative impacts on local geomorphology, freshwater inputs, precipitation and aquatic environment as well. Moreover, wind driven forces, tidal action, wave characteristics and changes in monsoon pattern regulate the coastal processes. This research suggests the importance of regular monitoring to assess present status of water quality and future prospect of aquaculture in the Chittagong coastal zone.
Modelling several morphometric relationships of swordfish (Xiphias gladius), black marlin (Makaira indica) and blue marlin (Makaira nigricans) caught from Indonesian longliners in the eastern Indian Ocean
Authors: Setyadji Bram , Jatmiko Irwan , Wujdi Arief
Published: May 2022

This paper presents several equations for converting among measures of size (length and weight) for swordfish (Xiphias gladius), black marlin (Makaira indica) and blue marlin (Makaira nigricans) caught by Indonesian longliners in the Indian Ocean. The equations use for transforming non-standard measurement i.e. eye fork length (EFL) and pectoral fork length (PFL) to standard measurement, lower jaw fork length (LJFL). The paper also discussed about the length-weight relationship, including converting from non-standard length (EFL and PFL) to round weight. The result showed that both PFL and EFL were positively related to LJFL but there were no significant differences existed between females and males among length measures for swordfish, blue marlin, and black marlin (ANCOVA, P>0.05). All regression equation models were considered to be valid (P<0.01) with coefficient of determinations (r2) ranged from 0.81-0.99. Allometric growth pattern was statistically observed for all swordfish (b=2.94, r2=0.94), black marlin (b=3.12; r2=0.90) and blue marlin (b=3.30; r2=0.91).
Present status of fish diversity in the Beel Kumari in relation to fish sanctuary and fishing gears
Authors: Joadder Md Abdur Razzak , Alam Md Bayazid , Siddique Md Abu Bakar , Naim Jannatun
Published: May 2022

The study was conducted on Beel Kumari beel (wetland) in Rajshahi, Bangladesh from October 2013 to September 2014. A total of 52 species of fish were recorded and the dominant species was Mystus tengara (Tanagra (9.75%). Exotic species like bighead carp (Aristichthys nobilis), silver carp (Hypophthalmichthys molitrix) and common carp (Cyprinus carpio) were also commonly found. Of the indigenous species, Ompok bimaculatus, Puntius sarana, Pseudeutropius atherinoides, Botia dario, Mystus aor and Chitala chitala were abundant, though these species were rare before the establishment of the fish sanctuary. Four groups of fishing gears i.e. net, trap, spear and harpoons and line fishing were found to use, among them 8 types of net, 7 types of trap, 4 types of spear and harpoon and 4 types of line fishing were recorded. Among these gill net contributed to the highest catch (32%) and push net was the lowest (6%). Most of the respondents (80%) were found to believe that their fish catch had increased considerably due to impact of fish sanctuary establishment and effective community based fisheries management approach employed in this beel.
Eutropiichthys vacha (Hamilton, 1822), a threatened fish of Indian subcontinent
Authors: Gupta Sandipan , Banerjee Samir
Published: May 2022

Eutropiichthys vacha (Batchwa vacha) is a freshwater catfish species having high economic value. It is a very popular table fish among the consumers due to high nutritional value and taste. Just recently small specimens of this species have also made their entry in ornamental fish markets. Recently due to number of reasons, populations of this fish species are facing the threat of extinction. It has already been documented as Endangered in India and Critically Endangered in Bangladesh. The present report has been prepared to summarize the information available on different aspects of this threatened fish species as well as to point out the possible measures that should be considered for its conservation.
Microstructures of barbels and bony plates of Satyrichthys laticeps (Actinopterygii: Peristediidae)
Authors: Ngamniyom Arin
Published: May 2022

Barbels are sensory-appendage near the mouth of many fishes including Cyprinidae, Ictaluridae and Peristediidae and commonly used for identification of the species. Similarly scales and bony plates of fishes also being used in taxonomic studies. Satyrichthys laticeps commonly called armoured searobins, is a deep-sea peristediid that distributed in the Indo-West Pacific region of the world. However, surface structures of has been unknown. The aim of this study is to reveal the microstructures of barbels and bony plates of S. laticeps, occurring in the Andaman Sea of Thailand, for the first time by using a scanning electron microscopy method. The chin barbels were characterised by a pebble-like surface whereas lip barbels resemble wooden texture. Taste bud-like organs were only visible in chin barbels. Bony plates from heads contained small semispheres around spine. In dorsolateral of posterior body, pits appeared at the apices, and semispherical buds were present in the middle and basal parts of tubercles. The study results may be important in understanding the physiology in peristediid fish.
First record of freshwater shrimp, Macrobrachium lamarrei lamarrei (H. Milne Edwards, 1837) from Gujarat, India
Authors: Purohit Barkha , Vachhrajani Kauresh D.
Published: May 2022

In the present study the presence of freshwater shrimp Macrobrachium lamarrei lamarrei (H. Milne Edwards, 1837) was recorded for the first time from a freshwater pond of Dabhoi, Vadodara district of Gujarat State, India in March 2015. This report discusses the taxonomy and distribution of this species.
Behavioural differences between breeding and nonbreeding pairs of protandry monogamous false clown anemonefish Amphiprion ocellaris
Authors: Iwata Eri , Yoshida Tasuku , Abe Tetsuya , Takahara Kou , Masuda Koji
Published: May 2022

Anemonefishes are some of the most popular marine ornamental fishes. Due to the adverse impacts of commercial fishing on the wild populations of anemonefishes, a more suitable and efficient captive breeding programme must be promoted. In the wild, anemonefishes are protandrous sex-changing fish, but when two immature individuals with ambisexual gonads are raised together in captivity, the two differentiate directly into a male and a female, to form a breeding pair. However, not all the formed pairs spawn, explaining the great care required in captive breeding. This behaviour appears to be counter-adaptative, as anemonefish social groups form randomly in the wild, and such phenomenon would disturb their breeding success. This study evaluated the behavioural and physiological differences between breeding and nonbreeding pairs of false clown anemonefish Amphiprion ocellaris under captive conditions. Behavioural observations revealed that nonbreeding females monopolized the shelter provided, whereas breeding females allowed breeding males to use the shelter and the pair frequently stayed together in the shelter. Both nonbreeding and breeding females possessed mature ovarian tissue and similar level of plasma estradiol concentrations, but nonbreeding males had a smaller amount of testicular tissue and lower plasma 11-ketotestosterone levels compared to breeding males.
Dynamics of bioindices in mud crab Scylla serrata (Forsskål, 1775) occurring in Hooghly-Matlah Estuary of West Bengal, India
Authors: Khan Mohinor Alam , Das Sudhir Kumar , Bhakta Dibakar
Published: May 2022

Dynamics of some bio indices (carapace width [CW] and body weight [W] relationship, relative condition factor [Kn]) of mud crab Scylla serrata (Forsskål, 1775), collected from the Hooghly-Matlah Estuary of West Bengal, were studied for a period of one year. A total of 325 specimens were collected (CW 44 – 120 mm, W 20 – 210 g) and studied. The CW and W relationship was found as W = 0.0006 CW2.665 for male and W = 0.001 CW2.561 for female. The b value was found relatively higher in male indicating better growth rate compared to females. Moreover, the growth pattern was allometric. The monthly mean Kn was 0.968 to 1.058 for males and 0.962 to 1.054 for females that significant varied (P < 0.05) among sampling months.
Gonadal histology of the tiger barb Puntius tetrazona (Cyprinidae)
Authors: Arman Sezgi , İşisağ Üçüncü Sema
Published: May 2022

The ornamental fish industry constitutes a big portion of the economy in many countries of the world. Thousands of attractive fish species are traded annually. The tiger barb Puntius tetrazona is one of the most charming freshwater aquarium species worldwide. The present paper aimed at expanding the knowledge of the reproductive biology of this tropical fish. The ovary and the testis tissues of the tiger barb were embedded in paraffin following routine histological processes, stained with hematoxylin and eosin and Mallory’s trichrome techniques, and investigated by light microscopy. Histological examinations confirmed asynchronous-type ovaries resembling four different developmental stages including primary growth, cortical alveolar, vitellogenic and maturation. In the testis, primary spermatogonia, secondary spermatogonia, primary spermatocytes, secondary spermatocytes, spermatids and spermatozoa were identified. All oogenetic and spermatogenetic phases and mature germ cells occurred simultaneously in the tiger barb. This feature allows this tropical fish to breed rapidly and helps expanding its global trades.
Length-weight relationship, condition factor and gonado-somatic index of Labeo calbasu (Hamilton, 1822)
Authors: Vahneichong E , Das Sudhir Kumar , Mondal Anandamoy , Bhakta Dibakar
Published: May 2022

An attempt was made to study dynamics of length-weight relationship (LWR), relative condition factor (Kn) and gonado-somatic index (GSI) of Labeo calbasu from the wetlands of South 24 Parganas district of West Bengal, India. A total of 275 fish specimens (130 to 430 mm) were examined over nine months from December 2006 to August 2007. Specimens were categorized into two groups based on the size at first maturity of 260 mm.  The LWR was recorded W = 0.007269 L3.181 for Group A (<260 mm) and W = 0.007367 L3.031 for Group B (≥260 mm). The individuals exhibited isometric growth. The monthly mean Kn values varied from 0.924 to 1.141 with an average value of 1.059. The mean monthly values of GSI varied from 0.544 to 3.301 for male and 0.560 to 9.649 for female. There was significant variation (P < 0.05) in the mean values of GSI in different months between sexes.
Ligula intestinalis infection of Pseudorasbora parva in Hirfanlı Dam Lake, Kırşehir, Turkey
Authors: Benzer Semra
Published: May 2022

Ligula intestinalis was found during the parasitological investigations of Pseudorasbora parva specimens collected from Hirfanlı Dam Lake, Turkey. It was found that 8.78% of all specimens were infected with L. intestinalis including 17 female (3.8%) and 22 males (4.95%). It was determined that the length–weight relationship equivalents of infected individuals with population differed from those of non-infected individuals. The b value of the infected individuals was found to be lower than the b value of the non-infected individuals. It is thought that the results obtained in this study will be beneficial in preserving and improving the ecological potential of the lake.
Pond fish culture and socio-economic status of fish farmers in Parbatipur upazila of Dinajpur district, Bangladesh
Authors: Fatema Kaniz , Naher Kamrun , Roy Krishna Chandra , Pervin Rubaiya
Published: May 2022

This study investigates the socio-economic conditions of the fish farmers and aquaculture status in Parbatipur of Dinajpur district during May to October 2016. Majority of the fish farmers belonged to the age group of 31 to 40 years (44.3%) and represented by 68.6% Muslims. Among them 40% had secondary level of education and most of the families were nuclear (64.3%). Farmers were involved in fish culture as their primary (24%) and secondary occupation (53%). Over 80% of the farmers had electricity facilities and 41% of them received health services from the village doctors. Only 9% of the fish farmers received formal training on fish culture. The average aquaculture pond size was 0.18 ha, where 84% ponds were perennial. The average stocking density was 23208 fingerlings ha–1 whereas organic fertilizer, urea and TSP were applied at 8665.4 kg ha–1 yr–1, 210.1 kg ha–1 yr–1 and 133.5 kg ha–1 yr–1 respectively. Pre and post stocking liming doses were 205.7 kg ha–1 yr–1 and 138.4 kg ha–1 yr–1 respectively. Necessary training facilities with institutional supports, credit facilities and extension services could play an important role in improving the fish production.
Note on occurrence of Lutke’s halfbeak Hemiramphus lutkei Valenciennes, 1847 (Beloniformes: Hemiramphidae), along Odisha Coast
Authors: Mohanty Swarup Ranjan , Seth Jaya Kishor , Mohapatra Anil , Mishra Subhrendu Sekhar
Published: May 2022

The paper reports occurrence of Lutke’s halfbeak Hemiramphus lutkei Valenciennes, 1847, for the first time from the coastal waters of Odisha coast, India. This report confirms the occurrence of this species form an extended geographical range along the east coast of India and will be helpful in further study of its biology, zoogeography and taxonomic status of the family Hemiramphidae.
Distribution and abundance of cichlids in the New Calabar River, Nigeria
Authors: Olopade Olaniyi Alaba , Dienye Henry Eyina
Published: May 2022

This study was conducted to study the distribution, abundance and diversity of the cichlids in the New Calabar River, Nigeria. A total of 1073 cichlids belonging to ten species and seven genera (Coptodon guineensis, C. zillii, C. dageti, Pelmatolapia mariae, Hemichromis fasciatus, Pelvicachromis taeniatus, Chomidotilapia guntheri, Tylochromis sudanensis, Sarotherodon galilaeus and S. melanotheron) were collected from three sampling stations between February and July, 2017. The most abundant species, in terms of number, was C. guineensis comprising 33.3% of all the number of species recorded followed by C. zillii (19%) and S. galilaeus (16.7%) while in terms of weight the dominant cichlids were C. guineensi   (38.4%),  C. zillii (19.6%) and S.  melanotheron (12.9%). Five species, C. guineensis, S. melanotheron, S. galilaeus, C. dageti and C. zillii were recorded throughout the months of study. The Shannon-Weaver diversity index was found the highest (1.5) at Station 1 and the lowest (0.93) at Station 3 while Pielou’s evenness index was the highest (0.77) at Station 1.
Size at maturity, maturity stages, and sex ratio of Micropterus salmoides (Lacepède, 1802) in Zimbabwe’s largest inland reservoir, Tugwi Mukosi: a baseline study
Authors: Magqina Terence , Mhere Alfred
Published: May 2022

Size at maturity, sex ratio and maturity stages are key population parameters that are important in fisheries management of exploited stocks as they influence survival of fish populations. The introduced largemouth bass Micropterus salmoides has successfully colonised freshwater bodies in southern Africa. In Tugwi Mukosi Dam, Zimbabwe’s largest reservoir, largemouth bass is a fish of importance as it provides tourism, food and income for the local communities. This study investigated population parameters of M. salmoides in Tugwi Mukosi Dam. The study revealed that the size at 50% sexual maturity (L50) value for male and female was 204 mm and 261 mm respectively. The logistic equation for female largemouth bass was M(L) = 1 / [1 + exp (–0.256L + 6.402)]. For male largemouth bass the logistic equation was M(L) = 1 / [1 + exp (–0.1375L + 4.129)]. The results showed that reproductive activity peaked in October. The male to female ratio was 1:1.04 which is typical of healthy populations. More research and monitoring of the population parameters of largemouth bass is needed so as to be able to predict long term effects of overexploitation and enable responsible authorities to protect the fish stock from collapsing.
Evaluation of fermented African mesquite seed (Prosopis africana) on growth and nutrient digestibility of Nile tilapia (Oreochromis niloticus) fingerlings
Authors: Aroyehun Shina Al-Habeeb , Alegbeleye Wilfred Olusegun , Agbebi Olubunmi Temilade , Akinde Abiodun
Published: May 2022

Production of cheap and quality dietary protein to replace the expensive conventional protein was studied in an 84-day feeding trial of Nile tilapia Oreochromis niloticus. African mesquite (Prosopis africana) seeds were subjected to fermentation processes and four iso-nitrogenous diets (35% crude protein) were formulated to contain graded levels of fermented African mesquite seed meal (FMS) to replace soybean meal (SBM) at four inclusion levels (0%, 15%, 30% and 45%) replicated in a completely randomised design. Proximate analysis showed increased in crude protein (35.10% to 41.29%), amino acids concentration, minerals content (calcium and phosphorus) while there were reductions in crude fibre (7.79% to 2.13%), crude lipids (4.02% to 2.67%) and anti-nutritional factors of FMS. The highest protein digestibility of 83.35% was recorded in FMS30 while FMS15 showed the least (77.07%). Carcass compositions were affected by diets composition. The minimum feeding cost of US$ 0.88 kg−1 was registered in FMS45 while FMS15 recorded the highest value of US$ 1.37 kg−1. In conclusion, 45% of FMS could replace SBM without compromising growth performance of Nile tilapia.
Diversity and conservation status of fish in the Nijhum Dweep National Park, Bangladesh
Authors: Sarker Kishor Kumar , Saha Moumita Saha , Sultana Irin , Khandakar Naim , Islam Sabiha , Baki Mohammad Abdul , Das Delip K.
Published: May 2022

Nijhum Dweep National Park lacks a detailed inventory of aquatic fauna including fish. This study reported the diversity and abundance of fish along with their conservation status from the surrounding waters of the national park to fill the knowledge gap. Fish samples were collected randomly from 16 spots of surrounding water of the park between October 2017 and March 2018. There were 47 fish species recorded belonging to 10 orders, 27 families and 44 genera. Odontamblyopus rubicundus was the dominant fish species that comprised 20.24% of the total catch, followed by Rhinomugil corsula (15.54%), Mystus gulio (12.03%) and Eleutheronema tetradactylum (9.92%). One nationally Endangered fish species (Clupisoma garua) and three Vulnerable fish species (Gudusia chapra, Sicamugil cascasia and Wallago attu) were recorded. Fish diversity of the park was rich but exceeding extraction rate, huge disposal of by catch, and presence of exotic omnivorous fish species was disconcerting that require monitoring and further studies.
Evaluation of some edible leaves as potential feed ingredients in aquatic animal nutrition and health
Authors: Olusola Sunday Emmanuel , Olaifa Flora Eyibio
Published: May 2022

In this study, the potential benefits of ten edible leaves (Manihot esculents, cassava leaf; Colocasia esculenta, cocoyam leaf; Talinum triagulare, water leaf; Telfairia occidentalis, fluted pumpkin leaf; Carica papaya, pawpaw leaf; Amaranthus chlorostachys, green leaf; Moringa oleifare, drumstick leaf; Vernonia amygdalina, bitter leaf; Ipomoea batatas, sweet potato leaf and Basella alba, Malabar spinach ‘Amunututu’ to aquatic animal nutrition and health were studied along with proximate, mineral and phytochemical compositions. Results show that theses edible leaves were a good source of protein and the highest crude protein was obtained in C. papaya (32.6%) while the lowest in C. esculenta (14.7%). The highest and lowest total ash was found in T. triagulare (34.6%) and C. papaya (11%) respectively. The result showed that the edible leaves are rich in wide variety of secondary metabolites of phytochemical constituents such as tannins, alkaloids, flavonoids, saponins, glycosides oxalates and phytate which can act against different diseases. Results suggest that inclusion of edible leaves may be nutritionally beneficial and this could promote growth, immune system and enhance disease resistance properties and subsequently very potential to reduce the cost of highly priced supplementary feeds.
Water pollution effects of river Saraswati and Kunti on livelihood: a case study of fishermen communities in Tribeni and Kuntighat, Hooghly, West Bengal
Authors: Panigrahi A. K. , Pattnaik Subasini
Published: May 2022

A prolific study was conducted to find out the impact of pollution on the socio-economic status of the fishermen community of Tribeni, Kuntighat - Hooghly, West Bengal, who depend on the rivers Saraswati, Kunti and Ganga for their livelihood. Analysis of important water quality parameters clearly reflects the pollution status of the rivers Saraswati and Kunti. Investigation was carried out by a previously tested questionnaire and personal interaction with 100 fishermen based on which the probable reasons of decline in fish diversity were drawn, which consequently adversely affected the economic conditions of fishermen. The investigation revealed a positive correlation between discharge of industrial effluents, in turn depleting the availability of fish food organisms and fish diversity and warning socioeconomic conditions of fishermen. Results clearly indicate proper steps should be taken by the policy makers towards restoration of water quality and thereby helping the vulnerable fishermen.
Determination of fatty acid composition in relation to the growth of meagre (Argyrosomus regius) cultured in net cages
Authors: Baki Birol , Öztürk Dilara Kaya , Kerim Murat
Published: May 2022

The aim of this study was to determine the composition of fatty acids of meagre (Argyrosomus regius) produced in net cages at a private company in the Aegean Sea. Regular samples were taken over the study period by random sampling for the estimation of fatty acid contents. At the end of the study, the highest mean (± SD) fatty acids in fish flesh were recorded as oleic acid (26.46 ± 0.01%), linoleic acid (20.91 ± 0.01%) and palmitic acid (15.99 ± 0.01%). Mean (± SD) total saturated (SFA), monounsaturated (MUFA) and polyunsaturated (PUFA) fatty acid values were determined as 26.17 ± 0.03%, 32.62 ± 0.03% and 31.24 ± 0.01% respectively. The total values of omega-3, omega-6, omega-9, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) were 8.73 ± 0.01 – 14.51 ± 0.04%, 18.78 ± 0.03 – 25.26 ± 0.01%, 27.12 ± 0.01 – 30.5 ± 0.01%, 1.39 ± 0.01 – 3.52 ± 0.01% and 4.24 ± 0.01 – 7.64 ± 0.01% respectively and all these values varied significantly over time (P < 0.05). Despite having a low crude fat content, the meagre could be a good source of PUFA, in terms of fatty acids.
Ichthyofauna of Gibe Sheleko National Park and some morphometric relationships of fish of the tributary rivers, Southern Ethiopia
Authors: Mekonen Sefi , Hailu Abera
Published: May 2022

Understanding of Ichthyofaunal diversity is a major gateway for the conservation of waterbodies in the world. Ethiopia has a rich Ichthyofaunal diversity, although they are poorly known. This study was carried out in two tributary rivers (Gibe and Wabe) of Gibe Sheleko National Park to investigate Ichthyofaunal diversity and morphometric characteristics of fish. By using monofilament gill-nets, fish were collected, identified and measured their morphometric. A total of 10 species were identified, dominated by Synodontis schall, followed by Labeobarbus nedgia and Labeobarbus intermedius. According to the Index of Relative Importance, S. schall was also first (49.13%), followed by L. intermedius (15.49%). Gibe River had a higher number of species than Wabe River. The Shannon Diversity Index in Gibe River was also higher (2.09) than Wabe (1.84) during the dry season, but lowest in the wet season (1.52 and 1.57 respectively). Synodontis schall had the largest girth, but Clarias gariepinus had the largest eye diameter and body weight. Heterobranchus longifilis was first in total, fork and standard body length. Generally, differences in sampling habitats and fishing effort might have contributed to discovered variants findings. Fishery development should be implemented in the Park to use the fish resource sustainably.
First record of Prawn Leptocarpus potamiscus (Kemp, 1917) (Crustacea: Decapoda: Palaemonidae) from Karnataka, West Coast of India
Authors: Pednekar Rajeshree , Haragi Shivakumar
Published: May 2022

The study reveals the first record of prawn species Laptocarpus potamiscus (Kemp, 1917) from Karnataka coast, West Coast of India. The genus Laptocarpus mainly described by their prominent key characters viz., presence of antennal spines, a prominent branchiostegal grooves and the absence of branchiostegal spines on the carapace. Globally, the genus Leptocarpus represents only three species with its Asian distribution, hitherto recorded from different localities across the Indian subcontinent. Specimen collected from Kali River estuary, Karwar being the first record from the Karnataka state. The morphological characters examined were similar to the description revealed for L. potamiscus by Kemp and Jayachandran. Hence, the study updates geographical distribution of L. potamiscucs from the Karnataka coast.
Production and economics of carp polyculture in ponds stocked with wild and hatchery produced seeds
Authors: Khan Md. Rafiqual Islam , Parvez Md. Taskin , Talukder Mohammad Golam Sarowar , Hossain Md. Akhtar , Karim Md. Shamsul
Published: May 2022

Lack of quality carp seeds is one of the major problems for fish production in Bangladesh. This experiment was conducted during July to December 2013 to study the production and economics of carp polyculture using wild and hatchery produced seeds in ponds in Faridpur district, Bangladesh.  Seeds of native major carps (NMCs) (Catla catla, Labeo rohita and Cirrhinus mrigala) and non-native carps (NNCs) (Hypophthalmichthys molitrix, Ctenophryngodon idella, Aristichthys nobilis and Cyprinus carpio) from four different sources were tested in feed and fertilizer based polyculture ponds under controlled mesocosm trials with four treatments (T1–T4), each with four replications. Combination, weight and density of the stocked species were same for all the treatments. Water quality parameters were monitored monthly and mean values were found within suitable range for fish farming. Mean final weight, weight gain, specific growth rate and yield of L. rohita, C. catla and C. mrigala were found significantly (P < 0.05) higher with treatment T1, T3 and T2 respectively. Treatments T1-T3 varied more significantly (P < 0.05) than treatment T4 for total fish yield and cost benefit ratio.  Polyculture of wild sourced NMCs and hatchery produced NNCs were found more profitable than aquaculture of hatchery produced NMCs and NNCs.
Length-weight relationship, growth pattern and condition factor of four indigenous cypriniform Schizothorax species from Vishav Stream of Kashmir Himalaya, India
Authors: Arafat Mohammad Yasir , Bakhtiyar Yahya
Published: May 2022

The indigenous Schizothorax spp. in the valley of Kashmir are facing constant threats and decline in their overall population. The current aim was to analyse the comparative length-weight relationship (LWRs) and condition factor (K) of 350 specimens belonging to four Schizothorax spp. (S. plagiostomus, S. esocinus, S. labiatus and S. curvifrons) from the Vishav Stream of Kashmir Himalaya, India. The fish specimens were sampled for a period of one year from April 2018 to March 2019. The results revealed that the growth coefficient ‘b’ in all the four Schizothorax spp. was found very close to 3, indicating an isometric growth pattern. No significant difference in the ‘b’ values of four Schizothorax spp. was found when compared with the isometric value (t-test: p > 0.05). The mean value of the ‘K’ for S. plagiostomus, S. esocinus, S. curvifrons and for S. labiatus were 0.81 ± 0.07, 0.80 ± 0.08, 0.85 ± 0.08 and 0.88 ± 0.12 respectively. The mean condition factor did not vary across four species (ANOVA: p > 0.05). The present findings could serve as baseline information for the management, stock assessment and future studies of indigenous capture fishery resources of the Vishav Stream and other similar habitats.
New record of spot-tail sleeper ray Narke dipterygia (Bloch and Schneider, 1801) (Elasmobranchii, Torpediniformes, Narkidae) from the coast of Gujarat, India
Authors: Bhatt Dhaval , Singh Santosh Kumar , Mankodi Pradeep C.
Published: May 2022

Narke dipterygia (Bloch and Schneider, 1801), commonly known as numb ray, is a widely distributed species in the Arabian Sea and South-East Asian countries. It has been recorded from Oman, Pakistan, Sri Lanka, Malaysia, Singapore, Indonesia, Thailand, Viet Nam, China, Taiwan Province of China and Japan. In India, majority of the findings of the species is from east and west coasts of India, only two records were reported namely Bombay of Maharashtra and Kerala. The present paper confirms the presence of N. dipterygia for the first time from Gujarat coast located on the west coast of India. The diagnostic characteristics and remarks on the taxonomy and distribution of N. dipterygia have been described in this paper.
Socio-economic status of fishermen community of Wular Lake in district Bandipora of Jammu and Kashmir
Authors: Habib Neelofer , Jan Salima
Published: May 2022

The present study investigates the socio-economic status of fishermen community of Wular Lake in district Bandipora of Jammu and Kashmir. Data were collected through structured interview schedule from 150 respondents from fishermen community between July and September 2020. It was found that 34.7% of the respondents fall in to the age group of 41–50 years and 56.0% were married. Majority of the respondents were illiterate (61.3%) and over half of the respondents (59.3%) earned monthly Rs.1000–5000. The study also explored that 93.3% of the respondents lived in their owned houses. The family size of fishing community was usually consisted of 7–10 members and 51.3% of them lived in a joint family system. However, most of them (54.66%) were dependent on river/canal water as drinking source and 59.3% were having dry latrine. It may be concluded that the fishermen community in the study area was the disadvantaged group of the society. Government, NGOs and respective stakeholders should come forward to take proper and necessary steps to improve their living conditions.
Evaluation of the reproductive cycle and gonadal development in the climbing perch, Anabas testudineus (Bloch, 1792) in captivity
Authors: Priyatha Chokki Veettil , Chitra Kumari Chidambaran
Published: May 2022

The climbing perch Anabas testudineus, the most demanded indigenous fish species of India, were used for the evaluation of reproductive strategy and gonadal development at first maturation under the controlled laboratory condition. In both sexes, four distinct gonadal developmental stages namely preparatory, pre-spawning, spawning, and post-spawning were identified based on the gonadosomatic index (GSI), hepatosomatic index (HSI), gonadal morphology, and the levels of serum sex hormones. The spawning stage was identified from July and August and the fecundity ranged from 6500–11000 eggs. The GSI exhibited a significant increase from preparatory to pre-spawning and spawning stages, and maintained high until August. The HSI was maintained the same during preparatory, pre-spawning, and spawning stages while increased in post-spawning stage in both sexes. Serum estrogen and testosterone levels increased significantly during pre-spawning, and spawning stages in both sexes. Fecundity showed a positive correlation with the length, weight, and ovary weight. Histological sections showed that male A. testudineus were group-synchronous spawners. Both sexes showed discrete reproductive cycles characterized by distinct changes in gonadal size, sex hormones and gonadal indices. This study will bridge the gap of insufficient knowledge to support the best practices suitable for the A. testudineus culture and survival under captivity.
A comparative review on freshwater fish fauna between West Bengal and Odisha, two middle-east Indian states
Authors: Chanda Angsuman , Jana Arun
Published: May 2022

The objective of the present study is the comparative revision of inland freshwater fish faunal diversity between West Bengal and Odisha, two states of middle-east India. Work is mainly based on the available published literature on the freshwater fish faunal diversity, checklist for fish, monograph of the area under study. Result reveals the existence of 345 species of fish belonging to 50 families under 14 orders. Analysis of data shows a slight similarity of freshwater fish faunal diversity between two states is quite expected because both the states differ in their physiography and ecology. The present report may serve as a helpful document for freshwater aquaculturists as well as fishery researchers for their future planning of research work on the subject of the study area.
Phenotypic characterization, genetic analysis and antibiotic sensitivity of Aeromonas hydrophila isolates causing dropsy in cultured Labeo rohita from Punjab, Pakistan
Authors: Sughra Fatima , Hafeez-ur-Rehman Muhammad , Abbas Farzana , Altaf Imran , Razzaq Saira , Kanwal Sidra , Inayat Muhammad , Anwer Iqra , Akram Muhammad
Published: May 2022

Motile Aeromonas septicemia (MAS) is a common freshwater fish disease and major threat to the aquaculture in Pakistan. The present study was carried out on suspected fish samples to isolate and characterize local strains of Aeromonas hydrophila, a key pathogen responsible for the said disease in aquacultured fishes. A total of ninety suspected fish specimens were collected from fish farms in Kasur, Okara and Gujranwala districts of Punjab, Pakistan from June 2018 to April 2019. The specimens were processed and A. hydrophila strains were isolated. The primary identification of sixty seven isolates were verified by colony morphology, microscopy and phenotypic characterization with ten biochemical reactions. The A. hydrophila strains of test samples were molecularly characterized by polymerase chain reaction (PCR) using 16S rRNA at desired size of 356bp. The PCR amplified product was subjected to DNA sequencing and phylogenetic analysis showed homology with related strains of Aeromonas spp. By antibiotic sensitivity test, the isolates were checked for nine antibiotics in which the pathogen was sensitive to four and resistant to five drugs. Results of genetic analysis confirmed strains as A. hydrophila which are useful to take preventive measures against the said disease.
Drivers of fisheries and their management in the lakes of Pokhara Valley, Nepal
Authors: Husen Md Akbal , Gurung Tek Bahadur , Nepal Agni Prasad
Published: May 2022

Inland fisheries provide food security, livelihood and well-being to community. Fisheries management of lakes is a complex process, influenced by many drivers. In this study the driver of fisheries of lakes of Pokhara Valley were determined through interview of Jalari fishers, key informants and field visits from July 2016 to June 2017. Key drivers were illegal fishing, siltation, loss of fish habitat, water pollution and accelerated eutrophication, intensification of agriculture, biological invasion and developmental works. These drivers have played a key role in changing lake characteristics including lake size, water quality, water depth and natural food availability which subsequently affected the cage aquaculture and capture fisheries of the lake. This paper included an insight of these drivers along with strategy to mitigate them to ensure sustainable fisheries.
Fecundity of the blotched picarel, Spicara maena (Linnaeus, 1758) from Oran Bay (Western Mediterranean Sea)
Authors: Dalouche Fatiha , Talet Lotfi Bensahla , Talet Ahmed Bensahla , Abi Ayad Sidi Mohamed El Amine
Published: May 2022

The fecundity of the blotched picarel Spicara maena from the western Mediterranean (Oran Bay) was assessed by the volumetric method. Total length (TL) of studied females varied between 91 and 140 mm (mean ± SD: 111.9 ± 10.6 mm). Estimates of total potential annual fecundity varied from 16750 to 28125 oocytes per individual (mean ± SD: 21404.7 ± 2698.8). Relationships between total potential fecundity (F) and TL, total weight, gonad weight were established using the multiplicative regression model and a high significant correlation was found in all the cases.
Investigation on changing pattern of health status of juvenile Hypophthalmichthys molitrix from farming systems in Bangladesh
Authors: Gosh Kamal , Ahmed Gias Uddin , Akter Mst Nahid
Published: May 2022

An experiment was carried out to investigate the health status of Hypophthalmichthys molitrix among three different fish farms at Mymensingh district of Bangladesh. Fish sampling and water quality parameters were collected on a monthly basis. Samples of skin, muscle, gills, liver and kidney were examined through histological technique. Results from water quality parameters suggested that water temperature had a distinct effect on fish health of H. molitrix, which was mostly evident during the colder months. Infectious symptoms were usually evident in July to October and the severity of pathology was increased in November and December. These were evident from their clinical signs that include scale loss, haemorrhagic lesion, and reddish spots or from their histopathological symptoms such as necrosis, pyknosis, inflammation, haemorrhage, hypertrophy, missing of gill lamellae, vacuums, tubular and pillar cells degeneration, inflammation, clubbing, and suspected bacterial colonies. Results suggest that the health condition of the fishes from BAU fish farm was the best over the other two farms, whereas Government fish farm followed by NGO fish farm were severely affected with EUS, protozoan and bacterial infection. Moreover, internal organs like liver and kidney were more affected than skin, muscle and gills.
Risk assessment of persistent organic pollutants in fishes from Pakistan and its neighbouring countries
Authors: Kalsoom Sehrish , Nasreen Zahida
Published: May 2022

Persistent Organic Pollutants (POPs) include a wide range of compounds including dichlorodiphenyltrichloroethanes’ (DDTs), hexachlorocyclohexanes (HCHs), polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs). These pollutants are present everywhere on earth i.e. soil, water and air. Their excessive use has adversely affected all ecosystems and their components including marine and freshwater, wildlife and human health. Although the use of POPs has been banned in many countries but they are still in use in many developing countries. This paper presents the sources and distribution of different POPs with special reference to their adverse effects and possible routes of contamination. Moreover, accumulation of these persistent pollutants in different body parts of fishes from major locations in Pakistan and its neighbouring countries (India, China and Iran) has been presented which exhibits their risk assessment for these important bioindicators of aquatic environments.
Genetic variation among three wild populations of stinging catfish (Heteropneustes fossilis) by allozyme electrophoresis
Authors: Hossain Mohammad Arif , Suraiya Sharmin , Haq Monjurul , Khan Md. Mukhlesur Rahman
Published: May 2022

Stinging catfish (Heteropneustes fossilis) is one of the most popular indigenous catfish having considerable potential for aquaculture and commercial importance in Bangladesh. With a view to assessing the genetic status of H. fossilis, three samples Chalan Beel (Pabna), Burungi Beel (Jamalpur) and Bagapura Beel (Mymensingh) were analyzed. For genetic variation study, five enzymes (LDH, EST, MDH, PGM and GPI) were used encoded by eight loci of which three were polymorphic (Mdh-1*, Est-1* and Gpi-1*). The highest mean proportion of polymorphic loci, mean number of allele and the mean proportion of heterozygous loci per individual of the Chalan Beel population were observed (25.00%, 1.250 and 6.250%, respectively). The highest gene flow (33.5) and lowest population differentiation (0.0074) found in Burungi Beel-Bagapura Beel indicated the close relationship among them. In the Nei’s UPGMA dendrogram, the Chalan Beel population formed one cluster by the genetic distance of 0.0371 and the other cluster was formed by Burungi Beel and Bagapura Beel populations (D=0.003).  The results suggested that a considerable genetic variation is maintained among the natural H. fossilis populations.
Livelihood of the fishermen in Monirampur Upazila of Jessore district, Bangladesh
Authors: Islam Md. Rezaul , Hoque Md. Nazmul , Galib Shams Muhammad , Rahman Md. Anisur
Published: May 2022

The study was conducted to assess the livelihood of fishermen in Monirampur Upazila of Jessore district from July to December, 2012. The mean age and fishing experience of fishermen were 35.22±9.67 and 17.9±7.12 years, respectively. Primary occupation for majority fishermen (90%) was fishing. The mean monthly income of the household (HH) was BDT 9470±4806.89. Only 2% fishermen were landless. 4% fishermen had training on fishing/fish culture. 46% fishermen involved in NGOs for loan and savings. 52% fishermen cultivated paddy during boro (summer) season whereas only 18% cultivated paddy during aman (rainy) season. Major protein sources to the HHs (monthly) were- small indigenous species (SIS) (4.60±2.64 kg), non-SIS (6.31±4.18 kg), meat (3.54±1.67 kg), eggs (18.73±22.20 pieces), and milk (11.10±15.54 liter). The major HH expenditures were- food, education, health, furniture, cloths and others. All fishermen were vulnerable to vabadaha, a situation when water logging takes place during monsoon due to lack of sufficient water drainage system.
Socio-economic status of fishermen of the Marjat Baor at Kaligonj in Jhenidah district, Bangladesh
Authors: Bappa Sanjoy Banerjee , Hossain Md. Mer Mosharraf , Dey Bipul Kumar , Akter Shirin , Hasan-Uj-Jaman Md.
Published: May 2022

This study was carried out to assess the socio-economic status of fishermen of the Marjat Baor at Kaligonj of Jhenidah district. Fifty fishermen from 50 families were interviewed. Results revealed that 94% respondents were married and age varied between 30 and 45 years. Almost all the fishermen were Hindus (96%). Most of the people of the community were illiterate (60%) and among all of the school going children (58%) were boys and (42%) were girls. Above fifty percent people lived in nuclear family. 40% people lived in earthen house, constructed by grass leaves and mud. Only a few (18%) of them were found to be use electricity. Primary occupation of 60% respondents was fishing and few were also involved in agriculture. They were often found to suffer from various diseases due to lack of pure drinking water. Majority of them got fever and receive treatment from quack. Only twelve percent (12%) women were engaged in making nets for fishing. Annual household income of maximum beneficiaries (44%) was below BDT 30,000 and above BDT 50,000 found in only 4% cases. In the present study, educational, organizational, and technical credit support were very crucial to develop their better socio-economic conditions.