bluuebunny/crossref_metadata_2025_split huggingface dataset:
Morphology of the Larval Stages of Clibanarius Sclopetarius (Herbst, 1796) (Decapoda, Diogenidae) Reared in the Laboratory
Authors: Brossi-Garcia Ana Luiza 
Published: April 2008

AbstractNous avons étudié le développement post-embryonnaire de Clibanarius sclopetarius (Herbst, 1796) provenant de São Sebastiâo, État de São Paulo, Brésil. Les larves ont été élevées au laboratoire dans un milieu dont la salinité était de 35°/°° et la témperature de 25 ± 2°C, avec Artemia salina comme nourriture. Nous avons observé quatre ou cinq stades zoé avant le stade mégalope. Tous ces stades sont dessinés et décrits de façon détaillée. D'autre part, des comparaisons morphologiques sont faites entre les données obtenues ici et celles déjà connues pour d'autres espèces appartenant au même genre. L'étude de la morphologie des larves est du plus grand intérêt pour l'établissement des rapports phylogénétiques parmi les Crustacés.
Un Harpacticoéde Nouveau Des Eaux Souterraines Phréatiques De L'Italie: Schizopera Lindae N. Sp. (Copepoda, Diosaccidae)*)
Authors: Apostolov Apostol , Pesce Giuseppe L. 
Published: April 2008

AbstractA new harpacticoid copepod from phreatic groundwater of south Italy (Basilicata), viz. Schizopera lindae n. sp., is described. According to a recent review of the genus Schizopera by Apostolov (1982), the new species belongs to Schizopera s. str., being close to S. paradoxa (Daday) and to S. longicauda (Sars). From the above species, as well as from the others, S. lindae n. sp. is easily distinguishable by the armature of legs 1 to 4, and by the construction and armature of leg 5.
Neuro-Endocrine Activity During Ovarian Maturation in the Fairy Shrimp Streptocephal Us Dichotomus Baird, 1860 (Anostraca)
Authors: Munuswamy N. , Subramoniam T. 
Published: April 2008

AbstractLes centres neurosécréteurs, tels que le cerveau et le pédoncule oculaire de S. dichotomus possèdent trois types de NSCs, se distinguant par la taille, la forme et les propriétés tinctoriales. Le pédoncule oculaire montre la présence d'un complexe organe X-glande du sinus au dessus de la région du pédoncule optique. Le NSM de la glande du sinus montre des variations cycliques pendant la reproduction. L'histologie des organes frontaux et leur inclusion dans le système neurosécréteur sont discutées. Les études cytologiques faites au cours des présentes recherches montrent une corrélation définie entre l'activité secrétrice des cellules du cerveau et le développement de l'ovaire. Les NSCs A et B du cerveau par exemple ont montré une intense NSM pendant le développement des oocytes. Ceci suggérerait que les cellules cérébrales A et B secrètent une hormone stimulatrice de l'ovaire. Dans le pédoncule oculaire les NSCs de type B et C ont montré une activité intense chez les femelles quiescentes sur le plan de la reproduction, ce qui suggère la production d'une hormone inhibitrice dans les NSCs du pédoncule oculaire. Chez S. dichotomus, en raison du chevauchement du cycle de reproduction, sans interphase importante il peut y avoir une production continue par les NSCs d'hormones destinées à la glande du sinus, et ainsi une phase distincte d'accumulation/liberation peut ne pas être évidente. Cependant, des expériences de ligature du pédoncule oculaire effectuées chez S. dichotomus à différentes phases du cycle de reproduction dénotent clairement l'analogie fonctionelle de la glande du sinus avec celle des Crustacés supérieurs.
Seasonal Distribution of Artemia Salina and Branchlnella Spinosa in a Saline Astatic Pond in South West Sardinia, Italy (Anostraca)
Authors: Mura Graziella 
Published: April 2008

AbstractLa distribuzione stagionale di Artemia salina e Brancfainella spinosa (Anostraca) è stata studiata in una pozza temporanea salmastra della costa occidentale della Sardegna. Artemia è presente da sola a salinità superiori al 70%, mentre per valori inferiori è presente anche Branchinella. Uno studio dettagliato della fluttuazioni annuali dei parametri chimicofisici ha dimostrato che il ciclo vitale di quest'ultima specie è assai più limitato in confronto a quello di Artemia. La biologia delle due specie è stata studiata in termini di schiusa, velocità di crescita, maturazione sessuale e riproduzione. Entrambe coesistono allo stadio di adulto per un lasso di tempo strettamente dipendente dagli eventi climatici. La breve sovrapposizione dei cicli osservata ha inoltre sollevato la questione di una possibile competizione, o di eventuali meccanismi per evitarla. Comunque le significative differenze rilevate per quanto concerne i tratti fondamentali del ciclo, e le differenze di dimensioni delle due specie in esame fanno ritenere che esista una separazione di nicchia. I risultati ottenuti vengono discussi e confrontati con altri casi segnalati in letteratura.
Biogeography of Alien Amphipods Occurring in Ireland, and Interactions With Native Species
Authors: Costello Mark J. 
Published: April 2008

AbstractFive alien species of amphipod Crustacea have arrived in Ireland this century. The terrestrial Arcitalitrus dorrieni (originally Australasian) and freshwater Crangonyx pseudogracilis (North American) were probably accidentally introduced with garden and garden-pond plants respectively. They had arrived by 1936 and 1969 (respectively), but have had very limited expansion of their ranges since then. The marine Corophium sextonae (originally from New Zealand) arrived by 1982, probably by natural means, from south-west Britain. The freshwater Gammarus pulex was deliberately introduced from Britain in the 1950s to enhance fisheries. However, the effects of this species on freshwater fish (as food source or in introducing parasites) have never been assessed. G. tigrinus was probably introduced accidentally from North America by ships during World War 1. These species are replacing the native G. duebenii celticus and G. lacustris, perhaps through a combination of interspecific and intraspecific predation, and greater population growth in certain biotopes. Despite its former abundance and ubiquity in Ireland, the long-term survival of G. d. celticus (a subspecies rare outside Ireland) appears threatened. The only other freshwater amphipod in Ireland, the subterranean Niphargus kochianus irlandicus is unique to Ireland, but too little is known of its biology and ecology to assess its status. The effects of the introduced species on the ecology of freshwater and terrestrial systems in Ireland remain unknown.
Heptacarpus Pictus (Stimpson) Synonymized With Heptacarpus Sitchensis (Brandt) (Decapoda, Hippolytidae)
Authors: Fagarason Michael , Flynn Robyn , Wicksten Mary K. 
Published: April 2008

AbstractHeptacarpus pictus (Stimpson, 1871) has been thought to be distinct from H. sitchensis (Brandt, 1851) based on the epipods: the former having epipods on the third maxillipcds and first and second pereopods, the latter having epipods on the third maxillipeds and first pereopods but not the second pereopods. The relative lengths of the antennular and antennal peduncles and the third maxillipeds to each other have been mentioned to be different in the two species. However, the description by Stimpson states that epipods of H. pictus were present on the first pereopods, not the second; the existing syntype of the species does not have epipods on the second pereopods. Study of over 280 specimens from British Columbia, Canada; California, U.S.A. and Baja California, Mexico, shows that individuals with epipods on the third maxillipeds and first pereopods occur throughout the range and that specimens also with epipods on the second pereopods occur in Monterey Bay and south of Point Conception, California. One individual was found with epipods on the third maxillipeds and first pereopods on both sides and an epipod on the second pereopod on the right side only. No other consistent differences in habitat, color or morphology were found between the specimens. We conclude that H. pictus is a junior synonym of H. sitchensis, and that shrimp with epipods on the second pereopods as well as the third maxillipeds and first pereopods constitute a morph of H. sitchensis.
New Record of Liocarcinus Mcleayi (Barnard, 1947), New Combination (Decapoda, Brachyura, Portunidae) From South Europe
Authors: Garcia Raso J. Enrique , Manjón-Cabeza E. 
Published: April 2008

AbstractFour specimens of the brachyuran crab Liocarcinus mcleayi (Barnard, 1947) (new combination), were captured from the Cadiz littoral (southern Spain) on a substratum of coarse sand and fine gravel under bottom currents at depths of 13 to 24 m. These captures represent a new record of this species from Iberian and European waters and support the known African influence in the Spanish littoral of Cadiz. Based on an anatomical study, a new combination is proposed for the name of the species.
Production of the Crayfish Cambarus Bartonii (Fabricius, 1798) (Decapoda, Cambaridae) in an Acidic Appalachian Stream (U.S.a.)
Authors: Perry Sue A. , Wolcott Lisa T. , Griffith Michael B. 
Published: April 2008

AbstractThe growth rate and annual production of the crayfish Cambarus bartonii were estimated in Crouch Run, a 3rd-order stream that drains a high-elevation catchment in West Virginia and which has been acidified because of acidic precipitation. Production of C. bartonii in Crouch Run was 525.8 mg AFDW m-2 yr-1 and was less than that for C. bartonii in Upper Ball Creek, a high-elevation circumneutral stream in North Carolina (961.0 mg AFDW m-2 yr-1, Huryn & Wallace, 1987). This difference seemed to be related to differences in the biomass of C. bartonii between the streams, because the P/B ratio for C. bartonii in Crouch Run was 7.4 compared with 5.8 in Upper Ball Creek.
Planktonic Copepods of Bahia De La Ascensión, Caribbean Coast of Mexico: a Seasonal Survey
Authors: Suárez-Morales E. , Gasca R. 
Published: April 2008

AbstractThe composition, abundance, and distribution of planktonic copepods collected at Bahia de la Ascensión, on the east coast of the Yucatan Peninsula, were analyzed during all three climatic periods of a year cycle (August, 1990-July, 1991). Highest mean copepod abundance was observed during the "nortes" period (524 org. 100 m-3), lowest values occurred during the dry season (91 org. 100 m-3). A total of 35 copepod species were identified, the most abundant were Acartia lilljeborgii, A. spinata, Labidocera scotti and L. mirabilis. Salinity gradients were weak and were not considered a relevant factor of the local copepod distribution. Spatial distribution of copepod densities throughout the year seemed to be related to different climatic regimes. From cluster analysis (Canberra Index), three facies could be identified: a bay facies, a neritic facies, and a mixed or semi-neritic facies. Copepod distribution during the three seasons was variable and showed the seasonal intensity of the marine influence in the system and the effect of the winds regime in the local copepod community.
A New Species of the Genus Pseudomysidetes (Mysidacea) From Japan and Reallocation of This Genus To the Heteromysini
Authors: Murano Masaaki , Bravo Manuel Rafael 
Published: April 2008

AbstractA new species of Mysidacea, Pseudomysidetes japonicus, is described. The present new species is clearly distinguishable from the other two species of the genus, P. russelli W. M. Tattersall, 1951 and P. cochinensis Panampunnayil, 1977, in the size of the antennal scale, the number of subsegments in the carpopropodus of the 3rd-8th thoracopod endopods, the length of the penis, the shape of the telson, and the number of spines on the endopod of the uropod. P. japonicus represents the first record of this genus in Japan. On the basis of the rudimentary pleopods in both sexes and the length of the penis in the male, Pseudomysidetes is transferred from the tribe Leptomysini to the tribe Heteromysini. An update of the taxonomic key to genera and subgenera of the Heteromysini is suggested.
Abundance and Taxa Composition of Copepod Nauplii Over Southeastern Bering Sea Deep Water Spawning Grounds of Walleye Pollock, Theragra Chalcogramma
Authors: Coyle K.O. , Paul A.J. , Paul J.M. 
Published: April 2008

AbstractThis project examined the abundance, taxa, stage and size of copepod nauplii available as prey for walleye pollock larvae in its deep water spawning grounds of the southeastern Bering Sea. Nauplii of the genera Oithona, Eucalanus, and Metridia were the most commonly encounted types while Pseudocalanus and Microcalanus were rare. There was marked interannual variation in the taxa and abundance of copepod nauplii coexisting with the pollock larvae. Stages I-IV of Oithona were present at 0 to 8 l-1 at different depths. Individual stages III-VI of Metridia nauplii occurred at 0 to 6 l-1, while Eucalanus nauplii were present at 0.1 to 9 l-1, depending on stage and depth. Nauplii III-IV of the genera Pseudocalanus and III-VI Microcalanus were usually present at less than 1 l-1. In 1992, 54 to 56% of the nauplii had body lengths of 150-350 μm which are typical of those found in stomachs of first-feeding pollock larvae. In 1993 corresponding estimates were 64 to 68%. Copepod nauplii with body lengths of 150-350 μm were generally present at 1 to 15 l-1, but at one station their counts exceeded 20 l-1.
Redescription of Lamproglena Clariae Fryer, 1956 (Copepoda, Lernaeidae), With Notes On Its Occurrence and Distribution
Authors: Avenant-Oldewage A. , Marx Hazel M. 
Published: April 2008

AbstractThe morphology of the gill parasite Lamproglena clariae Fryer, 1956, from the Olifants River, Kruger National Park, South Africa, was studied with the aid of light and scanning electron microscopy. Ultrastructural details of all appendages are given as well as a table and map with information on the occurrence and distribution of L. clariae in Africa. Important morphological findings include: the observation of only one claw on the maxilla; first time findings and descriptions of the nuchal organ, upper and lower lips, the fifth pair of legs and circular openings on all appendages.
Initiation and Outcome of Agonistic Contests in Male Form i cAmbarus Robustus Girard, 1852 Crayfish (Decapoda, Cambaridae)
Authors: Cornel Guiasu Radu , Dunham David W. 
Published: April 2008

AbstractDuring agonistic contests between size-matched Cambarus robustus crayfish males of breeding form, the eventual winners and losers initiated approximately the same number of fights. However, winners and losers differed in the frequencies and types of initiation behaviours used. The losers used almost exclusively the more subtle Ambivalent Contact initiation behaviours, whereas the winners used primarily the aggressive Lunge and Claws Raised initiation behaviours. The eventual losers initiated the vast majority (81.5%) of the very first fights in the overall agonistic contests. The type of initiation behaviours used by these crayfish from the beginning of the agonistic contests allows us to predict the eventual status (dominant or subordinate) of each of the two combatants. Furthermore, the frequency of the Lunge initiation behaviours used by the winners is significantly and negatively correlated with the total time spent fighting. As the dominant-subordinate relationship between the two combatants of each pair becomes established, there is a reduction in both the number and the duration of fights.
An Improved Method for Marking Crayfish
Authors: Rui Zhang Guan  
Published: April 2008

AbstractAn improved method of marking crayfish by refinement of punching holes in uropods and telson and clipping pleura was developed. The method, with at least 10 800 codes, provides an economical and practical approach to temporarily mark and individually identify crayfish, and is particularly useful for marking a large field sample. The method was tested by marking Pacifastacus leniusculus both in laboratory and river. The marks on the crayfish, ranging from 30 to 75 mm carapace length (CL), from the river lasted more than one year (or 2-3 moults). The table of 10 800 codes, in which most reliable codes are also indicated, is given to facilitate further application. The method is suitable for field studies on population size, density and dispersal or migration of animals as no significant effects on the survival of marked crayfish of >30 mm CL were found. However, care must be taken if the method is applied to estimate growth because a remarkable reduction (~20%) in the moult increment of CL after marking treatment was observed in crayfish, ranging from 33.4 to 46.6 mm CL, under laboratory conditions.
Some Life History Observations On the Pea Crab, Pinnotheres Tsingtaoensis, Symbiotic With the Bivalve Mollusk, Sanguinolaria Acuta
Authors: Soong Keryea 
Published: April 2008

AbstractThe pea crab, Pinnotheres tsingtaoensis, symbiotic with the bivalve mollusk, Sanguinolaria acuta, was collected in the estuary of Bazhan Stream on the west coast of Taiwan from May, 1992 to November, 1993. More than 90% of the bivalves were infested and most infested specimens (90-97%) hosted one crab. Two cohorts, i.e., year classes, of the bivalves were observed in May, but only one was seen between July and November; the life span of the crab is less than 2 years at the site. Recruitment of both the bivalves and the crabs apparently occurred between November and May next year. Positive size correlation between hosts and symbionts was found in larger sized females, but was not consistent in smaller sized males. All females had a soft carapace whereas most males had a hard carapace; females were less likely to leave the hosts than males upon collection of the host bivalves. Females accompanied by males were more likely to carry eggs. Mating probably took place inside the hosts where female crabs remained stationary, with males visiting different bivalves and spending much time outside the bivalves.
Host and Locality Records of the Fish Ectoparasite, Argulus (Branchiura), From Ohio (U.S.a.)
Authors: Poly William J. 
Published: April 2008

AbstractArgulus flavescens and A. appendiculosus were collected from five fish species in two major Ohio river basins during August-October, 1994. The golden redhorse, Moxostoma erythrurum, is a new host record for Argulus. The 1994 records as well as past host and distribution records of Argulus in Ohio and Lake Erie (U.S. and Canadian waters) have been compiled. Six species, A. flavescens, A. appendiculosus, A. lepidostei, A. stizostethii, A. americanus, and A. catostomi have been recorded from 15 Ohio fish species.
First Record of Spelaeogriphacea From Australasia: a New Genus and Species From an Aquifer in the Arid Pilbara of Western Australia
Authors: Humphreys W.F. , Poore Gary C.B. 
Published: April 2008

AbstractSpelaeogriphacea are reported for the first time from Australia. A new genus and species, Mangkurtu mityula, are described and the only other two genera diagnosed. The species, the third extant in the order, seems more similar to the Brazilian Potiicoara brasiliensis than to the South African Spelaeogriphus lepidops but all have unique apomorphies. The species is found in the aquifer in the Tertiary Millstream Dolomite of the Pilbara region of Western Australia. It is part of a fauna with clear Gondwanan affinities. This fauna is distinct from those found in aquifers in the lower and upper parts of the same drainage basin.
On Two New Species of Geothelphusa Stimpson, 1858 (Decapoda, Brachyura, Potamidae) From the Ryukyu Islands, Japan
Authors: Shy J.-Y. , Ng Peter K.L. 
Published: April 2008

AbstractTwo new species of potamid freshwater crabs of the genus Geothelphusa are described from the Ryukyu Islands in southern Japan. Although both G. shokitai sp. nov. and G. minei sp. nov. are allied to G. candidiensis (type locality Taiwan), they differ from that species and from each other in the form of their carapaces, ambulatory leg proportions, and structure of their male first pleopods.
First Record of the King Crab Lithodes Turritus Ortmann, 1892 (Decapoda, Lithodidae) in Taiwanese Waters
Authors: Chan Tin-Yam , Yu Hsiang-Ping , Wu Shu-Ho 
Published: April 2008

AbstractThe king crab, Lithodes turritus Ortmann, 1892, is reported from relatively deep waters in Taiwan for the first time. It also represents the first record of the family Lithodidae from Taiwan. Comparisons with its closest congener, L. longispina Sakai, 1971, are provided. The present Taiwanese specimens are the largest reported for this species.
Participant Agreement in the Justification of Qualitative Findings
Authors: Ashworth Peter 
Published: April 2008

AbstractQualitative research carried out within human science must provide justification for its findings. However, the justification of empirical claims concerning human meanings has to be approached in new ways: Quantitative procedures of validation or the use of experimental control are inappropriate. Many researchers have attempted to follow Schutz's (1962) ''postulate of adequacy," which lays down as a condition of acceptability of a scientific account of human action that it be understandable by the actor in terms of commonsense interpretation of everyday life. For instance, Harré (1978) suggests "validating" descriptions by ensuring that subjects of the research approve them. Against this approach, it is insisted that human science research is essentially an interpersonal process, and that therefore research activities cannot avoid such Goffmanesque features of self-presentation as resistance to being understood and eager acceptance of understanding, which are both pervasive possibilities of all social interaction. Thus, the research participant's agreement or disagreement cannot be taken as evidence as to the adequacy of a qualitative research description or interpretation.
David Kolb's Experiential Learning Machine
Authors: Hopkins Richard 
Published: April 2008

AbstractThis article is a review of David Kolb's program of work on learning styles and experiential learning, which I find to be a problematic instance of psychologism. I argue that Kolb's approach ignores the process nature of experience and that attractive as it may be instrumentally, it ultimately breaks down under the weight of its structuralist reductions. Kolb attempts to account for experiential learning without a coherent theory of experience, such as might have been found in phenomenology, which he virtually ignores. Thus, Kolb neglects the constitutive effects of the noetic-noemic corelationship and the intentional reality of the person. I contrast Kolb's formulations with John Dewey's much more resilient conception of "habit" and close with a critical analysis of various ways in which Kolb's learning-style instruments are used for aggressive intervention in people's lives.
A Phenomenological Perspective on Certain Qualitative Research Methods
Authors: Giorgi Amedeo 
Published: April 2008

AbstractIn this article the phenomonelogical approach to qualitative research is compared with certain other qualitative approaches following other paradigms. The thesis is that a deepened understanding of phenomenological philosophy can provide the alternative framework that many of these authors have been seeking. The comparison with other approaches is made in terms of theoretical and methodical consistency. Theoretically, the argument is that the situation known as "mixed discourse" exists because practitioners have not sufficiently freed themselves from the criteria and practices of traditional paradigms in which most qualitative researchers have been trained. The shift from the collection of numerical data to linguistic data takes place without appropriate shift in theoretical context. This state of affairs should be overcome in order to strengthen qualitative research. On the other hand, many qualitative researchers carry on practices that seem to be analogous to phenomenological prescriptions which are explicitly usually misunderstood or resisted when stated directly and generically. Thus, greater theoretical clarity and consistency as well as deeper reflection or better utilization of imaginative possibilities still seem to be called for in order to bring better theoretical conceptualization and more consistent practices to qualitative research.