Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism

The southern king crab, <i>Lithodes santolla</i>, is a well-known predator/scavenger species during its adult phase but its feeding strategy in early stages is less studied. This information is important to understand their role in ecosystems and to improve fishery management (i.e., stoc...

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Autores principales:	Luis Miguel Pardo, Claudia Andrade, Lisette Zenteno-Devaud, Bastián Garrido, Cristóbal Rivera
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Patagonia <i>Macrocystis</i> stable isotopes stomach content Decapoda <i>Lithodes santolla</i> Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/79976adf478d4ebda0a29072ecba810b
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spelling	oai:doaj.org-article:79976adf478d4ebda0a29072ecba810b2021-11-25T17:22:39ZTrophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism10.3390/d131105561424-2818https://doaj.org/article/79976adf478d4ebda0a29072ecba810b2021-11-01T00:00:00Zhttps://www.mdpi.com/1424-2818/13/11/556https://doaj.org/toc/1424-2818The southern king crab, <i>Lithodes santolla</i>, is a well-known predator/scavenger species during its adult phase but its feeding strategy in early stages is less studied. This information is important to understand their role in ecosystems and to improve fishery management (i.e., stock enhancement). Based on stomach contents and stable isotope analysis, we determined variation in the composition of diet and niche overlap in vagile and cryptic phase collected within and outside a kelp forest, <i>Macrocystis pyrifera</i>, of Aguila Bay at the Magellan Strait in Patagonia, Chile. Results of juvenile stomach content analysis showed 60% dissimilarity between cryptic and vagile juvenile phases. Algae dominated the volumetric contribution in cryptic juveniles while crustacean dominated the diet in vagile phase. Exoskeleton of other king crabs occurred in 43% of juveniles with crustaceans in their stomach. This fact confirms cannibalistic behavior in the wild in this species, which is consistent with findings in massive laboratory cultures. There was no evidence of isotopic niche shift between cryptic and vagile juvenile phases. Overlapping isotopic niches of different-sized juveniles suggest that they exploit similar food resources. However, vagile individuals occupy a higher trophic position than cryptic individuals, which could suggest a switch in dietary preference, from detritivorous/herbivory within kelp forests to omnivory outside of kelp forests, and an increase in the level of cannibalism in vagile juveniles.Luis Miguel PardoClaudia AndradeLisette Zenteno-DevaudBastián GarridoCristóbal RiveraMDPI AGarticlePatagonia<i>Macrocystis</i>stable isotopesstomach contentDecapoda<i>Lithodes santolla</i>Biology (General)QH301-705.5ENDiversity, Vol 13, Iss 556, p 556 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Patagonia <i>Macrocystis</i> stable isotopes stomach content Decapoda <i>Lithodes santolla</i> Biology (General) QH301-705.5
spellingShingle	Patagonia <i>Macrocystis</i> stable isotopes stomach content Decapoda <i>Lithodes santolla</i> Biology (General) QH301-705.5 Luis Miguel Pardo Claudia Andrade Lisette Zenteno-Devaud Bastián Garrido Cristóbal Rivera Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism
description	The southern king crab, <i>Lithodes santolla</i>, is a well-known predator/scavenger species during its adult phase but its feeding strategy in early stages is less studied. This information is important to understand their role in ecosystems and to improve fishery management (i.e., stock enhancement). Based on stomach contents and stable isotope analysis, we determined variation in the composition of diet and niche overlap in vagile and cryptic phase collected within and outside a kelp forest, <i>Macrocystis pyrifera</i>, of Aguila Bay at the Magellan Strait in Patagonia, Chile. Results of juvenile stomach content analysis showed 60% dissimilarity between cryptic and vagile juvenile phases. Algae dominated the volumetric contribution in cryptic juveniles while crustacean dominated the diet in vagile phase. Exoskeleton of other king crabs occurred in 43% of juveniles with crustaceans in their stomach. This fact confirms cannibalistic behavior in the wild in this species, which is consistent with findings in massive laboratory cultures. There was no evidence of isotopic niche shift between cryptic and vagile juvenile phases. Overlapping isotopic niches of different-sized juveniles suggest that they exploit similar food resources. However, vagile individuals occupy a higher trophic position than cryptic individuals, which could suggest a switch in dietary preference, from detritivorous/herbivory within kelp forests to omnivory outside of kelp forests, and an increase in the level of cannibalism in vagile juveniles.
format	article
author	Luis Miguel Pardo Claudia Andrade Lisette Zenteno-Devaud Bastián Garrido Cristóbal Rivera
author_facet	Luis Miguel Pardo Claudia Andrade Lisette Zenteno-Devaud Bastián Garrido Cristóbal Rivera
author_sort	Luis Miguel Pardo
title	Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism
title_short	Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism
title_full	Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism
title_fullStr	Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism
title_full_unstemmed	Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism
title_sort	trophic ecology of juvenile southern king crab associated with kelp forest: evidence of cannibalism
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/79976adf478d4ebda0a29072ecba810b
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_version_	1718412416329449472

Trophic Ecology of Juvenile Southern King Crab Associated with Kelp Forest: Evidence of Cannibalism

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