Proposed Standard Weight (<i>W</i><sub>s</sub>) Equations and Standard Length Categories for 18 Warmwater Nongame and Riverine Fish Species

Bister, Timothy J.; Willis, David W.; Brown, Michael L.; Jordan, Shawn S.; Neumann, Robert M.; Quist, Michael C.; Guy, Christopher S.

doi:10.1577/1548-8675(2000)020<0570:pswwse>2.3.co;2

Cited by 93 publications

(102 citation statements)

References 12 publications

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“…The standard weight equation for common carp is W s ¼ À4.639 þ (2.920)log 10 (TL) (Bister et al 2000). Finally, GSI was calculated as the ovary weight divided by the body weight times 100.…”

Section: Methodsmentioning

confidence: 99%

Maternal effects of common carp on egg quantity and quality

Weber

Brown

2012

Journal of Freshwater Ecology

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Maternal reproductive characteristics can play an influential role in fisheries by affecting offspring traits that can persist to influence year-class formation. We evaluated maternal characteristics of common carp (Cyprinus carpio), a widespread invader that can degrade aquatic ecosystems, to determine the variability of fecundity, egg size and egg energy density. Common carp fecundity increased with female size but was lower than identified in previously published reports. Female length, age, condition, and gonadosomatic index were positively correlated with ovary weight, fecundity, and egg volume, but not egg energy density. Additionally, fecundity was positively correlated with ovary weight and egg volume, but not energy density. Thus, larger and older females in better condition produce more and larger eggs compared to females that are smaller, younger, and in lower condition. These results have implications for understanding common carp reproduction, recruitment dynamics, and management of this species throughout its range.

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Section: Methodsmentioning

confidence: 99%

Maternal effects of common carp on egg quantity and quality

Weber

Brown

2012

Journal of Freshwater Ecology

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“…To calculate the standard weight, the following equation was used: log(W s ) = -4.974 + 3.085 log(TL) (Bister et al, 2000). The mean values of the relative weight calculated for each sex were compared by means of the Mann-Whitney U test.…”

Section: Relative Weight (W R )mentioning

confidence: 99%

Growth of black bullheadAmeiurus melas(Rafinesque, 1820) in Corbara Reservoir (Umbria – Italy)

Pedicillo

Bicchi

Angeli

et al. 2008

Knowl. Managt. Aquatic Ecosyst.

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The age and growth of the invasive black bullhead Ameiurus melas (Rafinesque, 1820) were studied in the Corbara Reservoir, an artificial lake located on the River Tiber in central Italy. The results of the research revealed that the population was made up of eight cohorts, the oldest specimens being spawned in 1999. The sex ratio appears to be balanced, although females predominate in the younger cohorts, while the percentage of males increases among older specimens. The differences between sexes in the slope of the length-weight relationship were not statistically significant; the slope for the whole sample (b = 3.055) was significantly greater than 3, indicating an allometric growth pattern of the black bullhead. There were no significant differences in mean back-calculated lengths at age between the sexes. Analysis of Lee's phenomenon revealed the existence of differential mortality among younger individuals (1 and 2 years old) that favours larger individuals. The Von Bertalanffy growth function was TL t = 35.69 {1 -exp[-0.18 (t + 0.27)]}. The specimens caught displayed mean relative weight (W r ) values distinctly below 100 at all ages, while no significant difference emerged between the sexes with regard to condition. RÉSUMÉCroissance du poisson-chat Ameiurus melas (Rafinesque, 1820) dans le Lac Corbara (Ombrie -Italie) L'âge et la croissance du poisson-chat invasif Ameiurus melas (Rafinesque, 1820) ont été étudiés dans le Lac Corbara, un lac artificiel situé le long du cours du fleuve Tevere, en Italie centrale. Les résultats de la recherche ont révélé que la population était composée de huit classes d'âges, les spécimens les plus âgés provenant de la fraie de 1999. Le sex-ratio semble être équilibré, bien que les femelles prédomi-nent dans les classes d'âges plus jeunes, tandis que le pourcentage de mâles augmente parmi les spécimens plus âgés. Les différences entre les sexes en matière de pente du rapport longueur-poids n'étaient pas significatives ; la pente de tout l'échantillon (b = 3.055) était significativement supérieure à 3, indiquant que le poisson-chat a un modèle de croissance allométrique. Aucune différence significative n'a été constatée entre les longueurs rétromesurées moyennes des différents sexes au même âge. L'analyse du phénomène de Lee a révélé l'existence d'une

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“…The next step was to divide the dataset into statistical populations, accomplished on the basis of the date and location of collection of the specimens (Giannetto et al, 2012a). For each statistical population, a plot of log 10 TL -log 10 W was then calculated separately to identify and eliminate anomalous measurements (values deviating by more than double the expected value by the regression curve) (Bister et al, 2000). As suggested by Froese (2006), all statistical populations showing an R 2 value of less than 0.90 or a value of the slope (b) outside the range of 2.5-3.5 were omitted from further examination, since such values usually belong to populations composed of few specimens or samples with a narrow length range (Pope et al, 1995;Froese, 2006).…”

Section: Validation Of the Datasets And Development Of Specific Lengtmentioning

confidence: 99%

Length–weight and length–length relationships for three endemic cyprinidspecies of the Aegean region (Turkey) with proposed standard weight equations

Giannetto¹,

Tarkan²,

Akbaş³

et al. 2015

Turk J Zool

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Empirical standard weight equations and length-weight and length-length relationships were estimated for Barbus pergamonensis, Capoeta bergamae, and Ladigesocypris irideus, three endemic cyprinid species of Turkey that are still not widely studied. To the best knowledge of the authors, empirical standard weight equations for the three species and L-W parameters for L. irideus are given here for the first time. In this study, length and weight data for B. pergamonensis, C. bergamae, and L. irideus were collected throughout the watercourses of Muğla Province and were used to develop species-specific W s equations. The results were for B. pergamonensis (total length [TL] range: 6-22 cm) log 10 W s = -5.713 + 3.718 log 10 TL -0.166 (log 10 TL) 2 , for C. bergamae (TL range: 8-29 cm) log 10 W s = -5.224 + 3.311 log 10 TL -0.083 (log 10 TL) 2 , and for L. irideus (TL range: 6-10 cm) log 10 W s = -13.298 + 12.116 log 10 TL -2.471 (log 10 TL) 2 . This study also reported new maximum TLs for the three species, together with species-specific length-weight and length-length equations.

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Proposed Standard Weight (W_s) Equations and Standard Length Categories for 18 Warmwater Nongame and Riverine Fish Species

Cited by 93 publications

References 12 publications

Maternal effects of common carp on egg quantity and quality

Maternal effects of common carp on egg quantity and quality

Growth of black bullheadAmeiurus melas(Rafinesque, 1820) in Corbara Reservoir (Umbria – Italy)

Length–weight and length–length relationships for three endemic cyprinidspecies of the Aegean region (Turkey) with proposed standard weight equations

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Proposed Standard Weight (Ws) Equations and Standard Length Categories for 18 Warmwater Nongame and Riverine Fish Species

Cited by 93 publications

References 12 publications

Maternal effects of common carp on egg quantity and quality

Maternal effects of common carp on egg quantity and quality

Growth of black bullheadAmeiurus melas(Rafinesque, 1820) in Corbara Reservoir (Umbria – Italy)

Length–weight and length–length relationships for three endemic cyprinidspecies of the Aegean region (Turkey) with proposed standard weight equations

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Product

Resources

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Proposed Standard Weight (W_s) Equations and Standard Length Categories for 18 Warmwater Nongame and Riverine Fish Species