Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)

Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)

The diet composition of Mullus barbatus and M. surmuletus in relation to ontogeny was compared to evaluate resource partitioning between these sympatric species. For each species, the fish were grouped by total length (LT) into 1-cm length classes. Cluster analyses were performed using the Bray-Curt...

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Autores principales: Aguirre, H, Sánchez, P
格式: Online
語言:eng
出版: Iniversidad Autónoma de Baja California 2005
在線閱讀:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/52
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spelling oai:cienciasmarinas.com.mx:article-522019-04-24T23:28:23Z Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean) Repartición del recurso trófico entre Mullus barbatus y M. surmuletus en el Mar Catalán (Mediterráneo Noroccidental) Aguirre, H Sánchez, P sympatric species ontogeny dietary similarities especies simpátricas ontogenia similitud trófica The diet composition of Mullus barbatus and M. surmuletus in relation to ontogeny was compared to evaluate resource partitioning between these sympatric species. For each species, the fish were grouped by total length (LT) into 1-cm length classes. Cluster analyses were performed using the Bray-Curtis similarity index and the group average link method (UPGMA). The results defined six new length groups based on diet similarities: (I) oldest adults of M. surmuletus (21–31 cm LT), (II) newly settled individuals of both species (6–8 cm LT), (III) oldest adults of M. barbatus (19–21 cm LT), (IV) adults of M. barbatus (12–18 cm LT), (V) juveniles of both species, and (VI) adults of M. surmuletus (12–20, 22 cm LT). The analysis of similarities (ANOSIM) showed that there were significant differences in trophic composition between successive length groups (P ≤ 0.05). Although these sympatric species feed on a similarly wide range of prey, the relative proportion of their items showed clear differences between species and also throughout their ontogeny; these differences were more evident as the fish aged. The feeding patterns described in the present paper reveal the importance of the food partitioning strategy to allow the intra- and interspecific occurrence of these sympatric species. Se examinó la composición trófica de Mullus barbatus y M. surmuletus con el fin de evaluar la repartición del recurso entre estas dos especies simpátricas. Para cada especie, los peces se agruparon en intervalos de clase de 1 cm (longitud total = LT). Se realizó el análisis de agrupamiento utilizando el índice de similitud de Bray-Curtis y el método de agrupación de UPGMA. Previamente, para cada intervalo de clase se estandarizó y transformó a doble raíz cuadrada la abundancia de las presas. Con base en la similitud trófica, se definieron seis nuevos grupos: (I) adultos mayores de M. surmuletus (21–31 cm LT), (II) organismos recién asentados de ambas especies (6–8 cm LT), (III) adultos mayores de M. barbatus (19–21 cm LT), (IV) adultos de M. barbatus (12–18 cm LT), (V) juveniles de ambas especies y (VI) adultos de M. surmuletus (12–20, 22 cm LT). El análisis de similitud (ANOSIM) muestra que existen diferencias significativas entre la composición trófica de los grupos sucesivos (P ≤ 0.05). Si bien estas especies simpátricas consumen una amplia gama de presas en común, la proporción relativa de sus componentes muestra diferencias claras entre especies e incluso dentro de cada especie a lo largo de su desarrollo; estas diferencias se tornan más evidentes en los organismos mayores. Los resultados del presente trabajo resaltan la importancia de la repartición trófica como un mecanismo que facilita la coexistencia intra e inter específica de estas dos especies simpátricas. Iniversidad Autónoma de Baja California 2005-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/52 10.7773/cm.v31i2.52 Ciencias Marinas; Vol. 31 No. 2 (2005); 429-439 Ciencias Marinas; Vol. 31 Núm. 2 (2005); 429-439 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/52/34
institution Ciencias Marinas
collection OJS
language eng
format Online
author Aguirre, H
Sánchez, P
spellingShingle Aguirre, H
Sánchez, P
Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)
author_facet Aguirre, H
Sánchez, P
author_sort Aguirre, H
title Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)
title_short Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)
title_full Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)
title_fullStr Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)
title_full_unstemmed Feeding resource partitioning between Mullus barbatus and M. surmuletus in the Catalan Sea (northwestern Mediterranean)
title_sort feeding resource partitioning between mullus barbatus and m. surmuletus in the catalan sea (northwestern mediterranean)
description The diet composition of Mullus barbatus and M. surmuletus in relation to ontogeny was compared to evaluate resource partitioning between these sympatric species. For each species, the fish were grouped by total length (LT) into 1-cm length classes. Cluster analyses were performed using the Bray-Curtis similarity index and the group average link method (UPGMA). The results defined six new length groups based on diet similarities: (I) oldest adults of M. surmuletus (21–31 cm LT), (II) newly settled individuals of both species (6–8 cm LT), (III) oldest adults of M. barbatus (19–21 cm LT), (IV) adults of M. barbatus (12–18 cm LT), (V) juveniles of both species, and (VI) adults of M. surmuletus (12–20, 22 cm LT). The analysis of similarities (ANOSIM) showed that there were significant differences in trophic composition between successive length groups (P ≤ 0.05). Although these sympatric species feed on a similarly wide range of prey, the relative proportion of their items showed clear differences between species and also throughout their ontogeny; these differences were more evident as the fish aged. The feeding patterns described in the present paper reveal the importance of the food partitioning strategy to allow the intra- and interspecific occurrence of these sympatric species.
publisher Iniversidad Autónoma de Baja California
publishDate 2005
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/52
_version_ 1715723928611061760

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