Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships
Growth stanzas or abrupt changes in growth rates are present throughout the life span of fish. Identifying growth stanzas will help to adequately described growth taking into account that fishes are indeterminate growers. In this study, we used length-weight (L-W) relationships to analyze the growth...
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Universidad de Costa Rica
2015
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/14948 |
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RBT149482022-06-09T17:42:18Z Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships Renán, Ximena Trejo-Martínez, Jorge Caballero-Arango, Doralice Brulé, Thierry growth stanzas length-weight relationships Grouper-Snapper complex Gulf of Mexico Growth stanzas or abrupt changes in growth rates are present throughout the life span of fish. Identifying growth stanzas will help to adequately described growth taking into account that fishes are indeterminate growers. In this study, we used length-weight (L-W) relationships to analyze the growth stanzas in the Grouper-Snapper complex of Southern Gulf of Mexico. For this, the type of sexuality, sex and different sexual maturity phase were considered in the analyses of three species of gonochoric Snappers (Lutjanidae) and six species of protogynous hermaphrodite Groupers (Epinephelidae). Welch ANOVA tests were carried out to determine the existence of differences in length and weight between juveniles and adults per sex. According to the observed differences, L-W relationship parameters (a and b), standard error (SE b) and coefficients of determination (R2) were calculated for all species separately by sex and sexual maturity phase. Snappers’ juvenile-females b-value ranged for 2.44-2.77, juvenile-males from 2.16-2.94, adult-females from 2.63-2.80 and adult-males form 2.63-2.98. Groupers’ b-value ranged for juvenile-females 2.66-3.20, adult-females from 2.73-3.31 and for adult-males 2.93-3.29. For each relationship b-value was t-tested (t-Student) to explore differences from the allometric coefficient (b=3), which indicated changes in body form. Hypothesis test, for regression slopes (b) between Snappers’ juvenile-females vs. adult-females and juvenile-males vs. adult-males and Groupers’ juvenile-females vs. adult-females and adult-females vs. adult-males, indicated different growth stanzas related to gonadal development for Snappers, and to gonadal development and sex change in Groupers. The identification of growth stanzas is crucial to avoid an overestimation or misleading growth rate which is used in fisheries management to establish some target reference points, such as maximum sustainable yield or yield-per-recruit. Universidad de Costa Rica 2015-03-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.ucr.ac.cr/index.php/rbt/article/view/14948 10.15517/rbt.v63i1.14948 Revista de Biología Tropical; Vol. 63 No. 1 (2015): Volume 63 – Regular number 1 – March 2015; 175–187 Revista de Biología Tropical; Vol. 63 Núm. 1 (2015): Volumen 63 – Número regular 1 – Marzo 2015; 175–187 Revista Biología Tropical; Vol. 63 N.º 1 (2015): Volume 63 – Regular number 1 – March 2015; 175–187 2215-2075 0034-7744 10.15517/rbt.v63i1 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/14948/18006 https://revistas.ucr.ac.cr/index.php/rbt/article/view/14948/18007 Copyright (c) 2015 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
eng |
| format |
Online |
| author |
Renán, Ximena Trejo-Martínez, Jorge Caballero-Arango, Doralice Brulé, Thierry |
| spellingShingle |
Renán, Ximena Trejo-Martínez, Jorge Caballero-Arango, Doralice Brulé, Thierry Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships |
| author_facet |
Renán, Ximena Trejo-Martínez, Jorge Caballero-Arango, Doralice Brulé, Thierry |
| author_sort |
Renán, Ximena |
| description |
Growth stanzas or abrupt changes in growth rates are present throughout the life span of fish. Identifying growth stanzas will help to adequately described growth taking into account that fishes are indeterminate growers. In this study, we used length-weight (L-W) relationships to analyze the growth stanzas in the Grouper-Snapper complex of Southern Gulf of Mexico. For this, the type of sexuality, sex and different sexual maturity phase were considered in the analyses of three species of gonochoric Snappers (Lutjanidae) and six species of protogynous hermaphrodite Groupers (Epinephelidae). Welch ANOVA tests were carried out to determine the existence of differences in length and weight between juveniles and adults per sex. According to the observed differences, L-W relationship parameters (a and b), standard error (SE b) and coefficients of determination (R2) were calculated for all species separately by sex and sexual maturity phase. Snappers’ juvenile-females b-value ranged for 2.44-2.77, juvenile-males from 2.16-2.94, adult-females from 2.63-2.80 and adult-males form 2.63-2.98. Groupers’ b-value ranged for juvenile-females 2.66-3.20, adult-females from 2.73-3.31 and for adult-males 2.93-3.29. For each relationship b-value was t-tested (t-Student) to explore differences from the allometric coefficient (b=3), which indicated changes in body form. Hypothesis test, for regression slopes (b) between Snappers’ juvenile-females vs. adult-females and juvenile-males vs. adult-males and Groupers’ juvenile-females vs. adult-females and adult-females vs. adult-males, indicated different growth stanzas related to gonadal development for Snappers, and to gonadal development and sex change in Groupers. The identification of growth stanzas is crucial to avoid an overestimation or misleading growth rate which is used in fisheries management to establish some target reference points, such as maximum sustainable yield or yield-per-recruit. |
| title |
Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships |
| title_short |
Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships |
| title_full |
Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships |
| title_fullStr |
Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships |
| title_full_unstemmed |
Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships |
| title_sort |
growth stanzas in an epinephelidae-lutjanidae complex: considerations to length-weight relationships |
| publisher |
Universidad de Costa Rica |
| publishDate |
2015 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/14948 |
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