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First Reference (first + reference)
Selected AbstractsLength,weight and length,length relationships of 10 small fish species from the Ganges, BangladeshJOURNAL OF APPLIED ICHTHYOLOGY, Issue 1 2009M. Y. Hossain Summary This study describes the length,weight (LWR) and length,length (LLR) relationships for ten small indigenous fish species from the lower part of the Ganges, Bangladesh, namely Ailia coila, Amblypharyngodon mola, Aspidoparia morar, Clupisoma atherinoides, Eutropiichthyes vacha, Glossogobius giuris, Gudusia chapra, Lepidocephalus guntea, Mystus vittatus, and Puntius ticto. A total of 2142 specimens, representing 10 species of 5 families used for this study were caught by traditional fishing gear from March 2006 to February 2007. Standard length (SL), total length (TL) and fork length (FL) for each specimen were measured by digital slide calipers and each body weight (BW) was taken by a digital balance. The allometric coefficient b of the LWR was close to the isometric value (b = 3.001) in G. giuris, although it suggested negative allometric growth in A. coila, A. morar, C. atherinoides, E. vacha, and P. ticto, whilst positive allometric growth in rest of the species. The results further indicated that the LLRs were highly correlated (r2 > 0.890; P < 0.01). To the best our knowledge, this study presented the first reference on LWR and LLR for most of the species in Bangladesh. [source] Weight,length relationships for eight species of the family Triglidae discarded on the south coast of PortugalJOURNAL OF APPLIED ICHTHYOLOGY, Issue 4 2006S. Olim Summary Gurnards or triglids are medium-size marine bottom fishes that live in tropical and temperate seas. Four genera (Aspitrigla, Chelidonichthys, Lepidotrigla, Trigla) and eight species are found in the eastern Atlantic. In this study, we report the weight,length relationships for eight species, with 75 specimens of A. cuculus, 45 of C. obscurus, 84 C. gurnardus, 21 C. lucernus, 45 C. lastoviza, 550 L. cavillone, 255 L. dieuzeidei and 40 T. lyra. These triglids were caught by three different methods: crustacean trawl, fish trawl and purse seine off the Algarve coast; all specimens sampled were part of the discards. Samples were obtained from depths ranging between 20 and 540 m, during 27 trips and 86 hauls. To the best knowledge of the authors, this study presents the first reference on weight,length relationships for four fish species from the Algarve coast (southern Portugal). [source] Weight,length relationships of some fish species of the Iberian PeninsulaJOURNAL OF APPLIED ICHTHYOLOGY, Issue 1 2005J. Oscoz Summary This study reports weight,length relationships (WLR) for Salmo trutta (Linnaeus, 1758), Phoxinus phoxinus (Linnaeus, 1758), Chondrostoma Chondrostoma miegii (Steindachner, 1866), Barbus graellsii (Steindachner, 1866), Barbatula barbatula (Linnaeus, 1758) and Gobio gobio (Linnaeus, 1758). Specimens were collected by electrofishing during summer between 1996 and 1998. The b values in the WLR W = aLb varied between 2.97 and 3.42. To the best knowledge of the authors, this study presents the first reference on WLRs for four of the species in Spanish waters. [source] Energy density of anchovy Engraulis encrasicolus in the Bay of BiscayJOURNAL OF FISH BIOLOGY, Issue 3 2009J. Dubreuil The energy density (ED) of anchovy Engraulis encrasicolus in the Bay of Biscay was determined by direct calorimetry and its evolution with size, age and season was investigated. The water content and energy density varied seasonally following opposite trends. The ED g,1 of wet mass (MW) was highest at the end of the feeding season (autumn: c. 8 kJ g,1MW) and lowest in late winter (c. 6 kJ g,1MW). In winter, the fish lost mass, which was partially replaced by water, and the energy density decreased. These variations in water content and organic matter content may have implications on the buoyancy of the fish. The water content was the major driver of the energy density variations for a MW basis. A significant linear relationship was established between ED g,1 (y) and the per cent dry mass (MD; x): y =,4·937 + 0·411x. In the light of the current literature, this relationship seemed to be not only species specific but also ecosystem specific. Calibration and validation of fish bioenergetics models require energy content measurements on fish samples collected at sea. The present study provides a first reference for the energetics of E. encrasicolus in the Bay of Biscay. [source] | ||||||||||