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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| Format: | Article |
| Language: | English |
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Vicerractoría Investigación
2015-03-01
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| Series: | Revista de Biología Tropical |
| Subjects: | |
| Online Access: | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442015000100014&lng=en&tlng=en |
| _version_ | 1797708273081647104 |
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| author | Ximena Renán Jorge Trejo-Martínez Doralice Caballero-Arango Thierry Brulé |
| author_facet | Ximena Renán Jorge Trejo-Martínez Doralice Caballero-Arango Thierry Brulé |
| author_sort | Ximena Renán |
| collection | DOAJ |
| 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 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 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. |
| first_indexed | 2024-03-12T06:19:59Z |
| format | Article |
| id | doaj.art-916889e9fe2242ee9f10e01a46432065 |
| institution | Directory Open Access Journal |
| issn | 0034-7744 |
| language | English |
| last_indexed | 2024-03-12T06:19:59Z |
| publishDate | 2015-03-01 |
| publisher | Vicerractoría Investigación |
| record_format | Article |
| series | Revista de Biología Tropical |
| spelling | doaj.art-916889e9fe2242ee9f10e01a464320652023-09-03T02:20:07ZengVicerractoría InvestigaciónRevista de Biología Tropical0034-77442015-03-01631175187S0034-77442015000100014Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationshipsXimena RenánJorge Trejo-MartínezDoralice Caballero-ArangoThierry BruléGrowth 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 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 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.http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442015000100014&lng=en&tlng=enestanzas de crecimientorelaciones longitud-pesocomplejo mero-pargoGolfo de México |
| spellingShingle | Ximena Renán Jorge Trejo-Martínez Doralice Caballero-Arango Thierry Brulé Growth stanzas in an Epinephelidae-Lutjanidae complex: considerations to length-weight relationships Revista de Biología Tropical estanzas de crecimiento relaciones longitud-peso complejo mero-pargo Golfo de México |
| title | 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_short | 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 |
| topic | estanzas de crecimiento relaciones longitud-peso complejo mero-pargo Golfo de México |
| url | http://www.scielo.sa.cr/scielo.php?script=sci_arttext&pid=S0034-77442015000100014&lng=en&tlng=en |
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