Salvato in:
| Autore principale: | |
|---|---|
| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidad de Costa Rica
2015
|
| Soggetti: | |
| Accesso online: | https://www.redalyc.org/articulo.oa?id=44933764014 |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
Sommario:
- Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships Ximena Renán Jorge Trejo-Martínez Doralice Caballero-Arango Thierry Brulé Biología Growth stanzas Gulf of Mexico GrouperSnapper complex lengthweight 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 indeter minate growers. In this study, we used lengthweight (LW) relationships to analyze the growth stanzas in the GrouperSnapper 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, LW relationship parameters ( a and b ), standard error (SE b ) and coefficients of determina tion ( R 2 ) were calculated for all species separately by sex and sexual maturity phase. Snappers’ juvenilefemales b value ranged from 2.442.77, juvenilemales from 2.162.94, adultfemales from 2.632.80 and adultmales from 2.632.98. Groupers’ b value ranged for juvenilefemales 2.663.20, adultfemales from 2.733.31 and for adultmales 2.933.29. 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’ juvenilefemales vs. adultfemales and juvenilemales vs. adultmales and Groupers’ juvenilefemales vs. adultfemales and adultfemales vs. adultmales, indicated different growth stanzas related to gonadal development for Snappers, and to gonadal development and sex change in Groupers. The identifica tion 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 yieldperrecruit. 2015 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44933764014 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1 Vol.63