Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships
| Autor: | Thierry Brulé, Doralice Caballero-Arango, Ximena Renán, Jorge Trejo-Martínez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Male
complejo mero-pargo Maximum sustainable yield Biología Zoology Growth stanzas lengthweight relationships Perciformes Sex change Hermaphrodite Lutjanidae Sexual maturity Animals Body Size Golfo de México Sexual Maturation Gonads lcsh:QH301-705.5 Mexico Gulf of Mexico Grouper-Snapper complex biology Ecology Body Weight length-weight relationships biology.organism_classification lcsh:Biology (General) relaciones longitud-peso Female Allometry estanzas de crecimiento Development of the gonads General Agricultural and Biological Sciences GrouperSnapper complex |
| Zdroj: | Instituto Politécnico Nacional IPN Redalyc-IPN Revista de Biología Tropical (Costa Rica) Num.1 Vol.63 Revista de Biología Tropical, Vol 63, Iss 1, Pp 175-187 (2015) 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): Volumen 63 – Número regular 1 – Marzo 2015; 175-187 Portal de Revistas UCR Universidad de Costa Rica instacron:UCR |
| ISSN: | 2215-2075 0034-7744 |
| DOI: | 10.15517/rbt.v63i1 |
| Popis: | 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 deter- mine 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 from 2.44-2.77, juvenile-males from 2.16-2.94, adult-females from 2.63-2.80 and adult-males from 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 1-tested (-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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|