FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES

Several tropical freshwater fish species are generally generalistic feeders, sometimes followed by a diet reduction during the period of decreased resource availability. This study aimed to analyze the dietary overlap between nektonic and benthic fish species. The stomachs of 82 obligatory nektonics...

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Autores principales:	Guilherme Raphael Camargo Arcanjo SILVA, Maurício CETRA
Formato:	article
Lenguaje:	EN
Publicado:	Instituto de Pesca 2021
Materias:	food ecology trophic similarity dietary overlapping fish ecology. Aquaculture. Fisheries. Angling SH1-691 Environmental sciences GE1-350 Oceanography GC1-1581
Acceso en línea:	https://doaj.org/article/0322d16b4e35423380964c1a11f98996
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spelling	oai:doaj.org-article:0322d16b4e35423380964c1a11f989962021-11-27T04:05:23ZFOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES10.20950/1678-2305/bip.2021.47.e6341678-2305https://doaj.org/article/0322d16b4e35423380964c1a11f989962021-11-01T00:00:00Zhttps://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1616/1517https://doaj.org/toc/1678-2305Several tropical freshwater fish species are generally generalistic feeders, sometimes followed by a diet reduction during the period of decreased resource availability. This study aimed to analyze the dietary overlap between nektonic and benthic fish species. The stomachs of 82 obligatory nektonics and 52 benthic were removed. The diet composition for each individual was determined based on the analysis of the stomach content, and the contents were grouped into 11 categories. For the analysis of food items, the method of degree of food preference was used. To verify the niche overlap between benthic and nectonic, the Pianka index was applied. Benthic species consumed items across all 11 food categories and nektonic species consumed nine. The diet composition of species with nektonic and benthic habits showed a significant difference. Dietary overlapping suggests a supply of the same resources, as they are shared by both groups. The high concentration of water insect larvae in the food content of all sampled fish species, regardless of the position in the water column, shows the importance of insects in the water ecosystems. The composition of ecosystem diets is helpful towards understanding the community structure and can explain the coexistence between different fish’s groups where live in different micro-habitats and how tactics used to capture food which may minimize the effects of overlapping and competitive exclusion.Guilherme Raphael Camargo Arcanjo SILVAMaurício CETRAInstituto de Pescaarticlefood ecologytrophic similaritydietary overlappingfish ecology.Aquaculture. Fisheries. AnglingSH1-691Environmental sciencesGE1-350OceanographyGC1-1581ENBoletim do Instituto de Pesca, Vol 47, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	food ecology trophic similarity dietary overlapping fish ecology. Aquaculture. Fisheries. Angling SH1-691 Environmental sciences GE1-350 Oceanography GC1-1581
spellingShingle	food ecology trophic similarity dietary overlapping fish ecology. Aquaculture. Fisheries. Angling SH1-691 Environmental sciences GE1-350 Oceanography GC1-1581 Guilherme Raphael Camargo Arcanjo SILVA Maurício CETRA FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES
description	Several tropical freshwater fish species are generally generalistic feeders, sometimes followed by a diet reduction during the period of decreased resource availability. This study aimed to analyze the dietary overlap between nektonic and benthic fish species. The stomachs of 82 obligatory nektonics and 52 benthic were removed. The diet composition for each individual was determined based on the analysis of the stomach content, and the contents were grouped into 11 categories. For the analysis of food items, the method of degree of food preference was used. To verify the niche overlap between benthic and nectonic, the Pianka index was applied. Benthic species consumed items across all 11 food categories and nektonic species consumed nine. The diet composition of species with nektonic and benthic habits showed a significant difference. Dietary overlapping suggests a supply of the same resources, as they are shared by both groups. The high concentration of water insect larvae in the food content of all sampled fish species, regardless of the position in the water column, shows the importance of insects in the water ecosystems. The composition of ecosystem diets is helpful towards understanding the community structure and can explain the coexistence between different fish’s groups where live in different micro-habitats and how tactics used to capture food which may minimize the effects of overlapping and competitive exclusion.
format	article
author	Guilherme Raphael Camargo Arcanjo SILVA Maurício CETRA
author_facet	Guilherme Raphael Camargo Arcanjo SILVA Maurício CETRA
author_sort	Guilherme Raphael Camargo Arcanjo SILVA
title	FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES
title_short	FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES
title_full	FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES
title_fullStr	FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES
title_full_unstemmed	FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES
title_sort	food resource sharing among benthic and nektonic stream fish species
publisher	Instituto de Pesca
publishDate	2021
url	https://doaj.org/article/0322d16b4e35423380964c1a11f98996
work_keys_str_mv	AT guilhermeraphaelcamargoarcanjosilva foodresourcesharingamongbenthicandnektonicstreamfishspecies AT mauriciocetra foodresourcesharingamongbenthicandnektonicstreamfishspecies
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FOOD RESOURCE SHARING AMONG BENTHIC AND NEKTONIC STREAM FISH SPECIES

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