Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil
Ontogenetic diet changes (prey species richness and size) in juveniles of white sea catfish (Genidens barbus) were tested in three southern Brazilian estuaries: Mampituba (298120S), Tramandaı´ (308020S), Chuı´ (338440S). Cluster analysis revealed that white sea catfish juvenile populations in the th...
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ftunivfurg:oai:repositorio.furg.br:1/1943 2023-11-12T04:27:55+01:00 Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil Mendoza-Carranza, Manuel Vieira Sobrinho, João Paes 2009 application/pdf http://repositorio.furg.br/handle/1/1943 eng eng MENDOZA-CARRANZA, Manuel; VIEIRA, João Paes. Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil. Journal of the Marine Biological Association of the United Kingdom, v. 89, n. 4, p. 839–848, 2009. Disponível em: <http://journals.cambridge.org/download.php?file=%2FMBI%2FMBI89_04%2FS0025315408002403a.pdf&code=d9c7a421e537eee667d2aaa56a4c8e16>. Acesso em: 09 mar. 2012. 0025-3154 http://repositorio.furg.br/handle/1/1943 restrict access Trophic ecology Diet overlap Prey size Predator–prey relationship article 2009 ftunivfurg 2023-10-24T20:58:13Z Ontogenetic diet changes (prey species richness and size) in juveniles of white sea catfish (Genidens barbus) were tested in three southern Brazilian estuaries: Mampituba (298120S), Tramandaı´ (308020S), Chuı´ (338440S). Cluster analysis revealed that white sea catfish juvenile populations in the three estuaries are composed of two feeding groups. These two feeding groups are coincident with a bimodal size–age distribution of the juveniles of white sea catfish. In small catfish (5 to 10 cm TL) copepods were the most numerous prey (Chuı´¼ 86.66%N, Tramandaı´¼ 85.52%N and Mampituba ¼ 52.34%N). In large catfish (10 to 20 cm TL) the most abundant and frequent prey was fish (Chuı´: 73.19%N and 74.56%FO; Tramandaı´: 85.92%N and 73.33%FO; Mampituba: 52.34%N and 61.54%FO). The Morisita overlap index among small and large fish was low in all estuaries; high values of Morisita’s similarity index were observed among same size catfish groups. In all cases, no differences were observed among prey bio-volume curves of same size predator groups(small, F ¼ 0.41, P ¼ 0.65; large, F ¼ 2.19, P ¼ 0.11). In all estuaries, prey size increased significantly with increasing predator size. The 90th regression quantile estimated with most precision the predator–prey size relationship. Article in Journal/Newspaper White Sea Copepods RI FURG (Repositório da Universidade Federal do Rio Grande) White Sea |
institution |
Open Polar |
collection |
RI FURG (Repositório da Universidade Federal do Rio Grande) |
op_collection_id |
ftunivfurg |
language |
English |
topic |
Trophic ecology Diet overlap Prey size Predator–prey relationship |
spellingShingle |
Trophic ecology Diet overlap Prey size Predator–prey relationship Mendoza-Carranza, Manuel Vieira Sobrinho, João Paes Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil |
topic_facet |
Trophic ecology Diet overlap Prey size Predator–prey relationship |
description |
Ontogenetic diet changes (prey species richness and size) in juveniles of white sea catfish (Genidens barbus) were tested in three southern Brazilian estuaries: Mampituba (298120S), Tramandaı´ (308020S), Chuı´ (338440S). Cluster analysis revealed that white sea catfish juvenile populations in the three estuaries are composed of two feeding groups. These two feeding groups are coincident with a bimodal size–age distribution of the juveniles of white sea catfish. In small catfish (5 to 10 cm TL) copepods were the most numerous prey (Chuı´¼ 86.66%N, Tramandaı´¼ 85.52%N and Mampituba ¼ 52.34%N). In large catfish (10 to 20 cm TL) the most abundant and frequent prey was fish (Chuı´: 73.19%N and 74.56%FO; Tramandaı´: 85.92%N and 73.33%FO; Mampituba: 52.34%N and 61.54%FO). The Morisita overlap index among small and large fish was low in all estuaries; high values of Morisita’s similarity index were observed among same size catfish groups. In all cases, no differences were observed among prey bio-volume curves of same size predator groups(small, F ¼ 0.41, P ¼ 0.65; large, F ¼ 2.19, P ¼ 0.11). In all estuaries, prey size increased significantly with increasing predator size. The 90th regression quantile estimated with most precision the predator–prey size relationship. |
format |
Article in Journal/Newspaper |
author |
Mendoza-Carranza, Manuel Vieira Sobrinho, João Paes |
author_facet |
Mendoza-Carranza, Manuel Vieira Sobrinho, João Paes |
author_sort |
Mendoza-Carranza, Manuel |
title |
Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil |
title_short |
Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil |
title_full |
Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil |
title_fullStr |
Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil |
title_full_unstemmed |
Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil |
title_sort |
ontogenetic niche feeding partitioning in juvenile of white sea catfish genidens barbus in estuarine environments, southern brazil |
publishDate |
2009 |
url |
http://repositorio.furg.br/handle/1/1943 |
geographic |
White Sea |
geographic_facet |
White Sea |
genre |
White Sea Copepods |
genre_facet |
White Sea Copepods |
op_relation |
MENDOZA-CARRANZA, Manuel; VIEIRA, João Paes. Ontogenetic niche feeding partitioning in juvenile of white sea catfish Genidens barbus in estuarine environments, southern Brazil. Journal of the Marine Biological Association of the United Kingdom, v. 89, n. 4, p. 839–848, 2009. Disponível em: <http://journals.cambridge.org/download.php?file=%2FMBI%2FMBI89_04%2FS0025315408002403a.pdf&code=d9c7a421e537eee667d2aaa56a4c8e16>. Acesso em: 09 mar. 2012. 0025-3154 http://repositorio.furg.br/handle/1/1943 |
op_rights |
restrict access |
_version_ |
1782341342778621952 |