Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile

One of the primary ways in which species interact with their environment is through foraging; thereby directly consuming some fraction of their surrounding habitat. The habitat itself, in turn, may dictate the types of foraging opportunities that are available to the inhabitants. To investigate the...

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Autores principales:	PÉREZ-MATUS,ALEJANDRO, PLEDGER,SHIRLEY, DÍAZ,FRANCISCO J, FERRY,LARA A, VÁSQUEZ,JULIO A
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2012
Materias:	Chile Manly α predation trophic guilds understory
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100003
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spelling	oai:scielo:S0716-078X20120001000032012-06-13Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern ChilePÉREZ-MATUS,ALEJANDROPLEDGER,SHIRLEYDÍAZ,FRANCISCO JFERRY,LARA AVÁSQUEZ,JULIO A Chile Manly α predation trophic guilds understory One of the primary ways in which species interact with their environment is through foraging; thereby directly consuming some fraction of their surrounding habitat. The habitat itself, in turn, may dictate the types of foraging opportunities that are available to the inhabitants. To investigate the relationship between habitat availability and diet composition of habitat-associated fishes, we estimated the relative abundance of the potential sessile and mobile prey items and the diet of the fish species assemblage associated to kelp forest. Specifically, diet and feeding selectivity of the kelp-forest associated fish assemblage were determined by calculating Manly's alpha selectivity index. We determined the diet of kelp forest associated fishes and their foraging behavior by comparing prey availability with those items present in the stomachs of fishes captured by gill net and spear gun. We calculated the degree of dietary overlap among fishes from four locations along the northern coast of Chile. Results indicate that utilization of prey by predators is predominantly affected by potential prey availability. With the exception of the two carnivorous species such as Pinguipes chilensis (Valenciennes, 1883) and Paralabrax humeralis (Cuvier & Valenciennes, 1828), whose diet did not change among sites, all other kelp-associated fishes changed their dietary habitats to consistent with the availability of local resources. Benthic resources changed among the different study sites, which led to differing diets even in the same species from different locations. Eleven of the 12 kelp forest fishes also showed some selectively for benthic prey. We conclude that the ability of fishes to be plastic in their feeding preference and, therefore, partition the benthic resources may set adaptations to co-exist in a dynamic environment such as kelp forest.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.85 n.1 20122012-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100003en10.4067/S0716-078X2012000100003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chile Manly α predation trophic guilds understory
spellingShingle	Chile Manly α predation trophic guilds understory PÉREZ-MATUS,ALEJANDRO PLEDGER,SHIRLEY DÍAZ,FRANCISCO J FERRY,LARA A VÁSQUEZ,JULIO A Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile
description	One of the primary ways in which species interact with their environment is through foraging; thereby directly consuming some fraction of their surrounding habitat. The habitat itself, in turn, may dictate the types of foraging opportunities that are available to the inhabitants. To investigate the relationship between habitat availability and diet composition of habitat-associated fishes, we estimated the relative abundance of the potential sessile and mobile prey items and the diet of the fish species assemblage associated to kelp forest. Specifically, diet and feeding selectivity of the kelp-forest associated fish assemblage were determined by calculating Manly's alpha selectivity index. We determined the diet of kelp forest associated fishes and their foraging behavior by comparing prey availability with those items present in the stomachs of fishes captured by gill net and spear gun. We calculated the degree of dietary overlap among fishes from four locations along the northern coast of Chile. Results indicate that utilization of prey by predators is predominantly affected by potential prey availability. With the exception of the two carnivorous species such as Pinguipes chilensis (Valenciennes, 1883) and Paralabrax humeralis (Cuvier & Valenciennes, 1828), whose diet did not change among sites, all other kelp-associated fishes changed their dietary habitats to consistent with the availability of local resources. Benthic resources changed among the different study sites, which led to differing diets even in the same species from different locations. Eleven of the 12 kelp forest fishes also showed some selectively for benthic prey. We conclude that the ability of fishes to be plastic in their feeding preference and, therefore, partition the benthic resources may set adaptations to co-exist in a dynamic environment such as kelp forest.
author	PÉREZ-MATUS,ALEJANDRO PLEDGER,SHIRLEY DÍAZ,FRANCISCO J FERRY,LARA A VÁSQUEZ,JULIO A
author_facet	PÉREZ-MATUS,ALEJANDRO PLEDGER,SHIRLEY DÍAZ,FRANCISCO J FERRY,LARA A VÁSQUEZ,JULIO A
author_sort	PÉREZ-MATUS,ALEJANDRO
title	Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile
title_short	Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile
title_full	Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile
title_fullStr	Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile
title_full_unstemmed	Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile
title_sort	plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern chile
publisher	Sociedad de Biología de Chile
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100003
work_keys_str_mv	AT perezmatusalejandro plasticityinfeedingselectivityandtrophicstructureofkelpforestassociatedfishesfromnorthernchile AT pledgershirley plasticityinfeedingselectivityandtrophicstructureofkelpforestassociatedfishesfromnorthernchile AT diazfranciscoj plasticityinfeedingselectivityandtrophicstructureofkelpforestassociatedfishesfromnorthernchile AT ferrylaraa plasticityinfeedingselectivityandtrophicstructureofkelpforestassociatedfishesfromnorthernchile AT vasquezjulioa plasticityinfeedingselectivityandtrophicstructureofkelpforestassociatedfishesfromnorthernchile
_version_	1718439661404160000

Plasticity in feeding selectivity and trophic structure of kelp forest associated fishes from northern Chile

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