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Article

Trophic Niche Dynamics and Diet Partitioning of King Crab Lithodes santolla in Chile’s Sub-Antarctic Water

by
Claudia Andrade
1,*,
Cristóbal Rivera
1,
Erik Daza
2,
Eduardo Almonacid
2,
Fernanda Ovando
1,
Flavia Morello
3 and
Luis Miguel Pardo
4,5,6
1
Laboratorio de Ecología Funcional, Instituto de la Patagonia, Universidad de Magallanes, Punta Arenas 6210427, Chile
2
Instituto de Fomento Pesquero, Punta Arenas 6210549, Chile
3
Centro de Estudios del Hombre Austral, Instituto de la Patagonia, Universidad de Magallanes, Punta Arenas 6210427, Chile
4
Laboratorio Costero de Calfuco, Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile
5
Centro de Investigación de Dinámica de Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia 5090000, Chile
6
Centro de Investigación en Ecosistemas de la Patagonia (CIEP), Coyhaique 5951601, Chile
*
Author to whom correspondence should be addressed.
Diversity 2022, 14(1), 56; https://doi.org/10.3390/d14010056
Submission received: 24 December 2021 / Revised: 11 January 2022 / Accepted: 12 January 2022 / Published: 15 January 2022
(This article belongs to the Special Issue Ecology and Management of Crab Species: Recent Advances and New Challenges)
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Abstract

The southern king crab Lithodes santolla is one of the most economically important fishery species in the southern waters of the Atlantic and Pacific Oceans. A combination of stomach content and stable isotope analyses was used to reveal the potential dietary characteristics, isotopic niche, overlap among maturity stages and sexes, and trophic relationships of an L. santolla population in the Nassau Bay, Cape Horn region. Stable isotope analyses indicated that L. santolla assimilated energy from a basal carbon source, the giant kelp Macrocystis pyrifera, forming the trophic baseline of the benthic food web. Moreover, the trophic position of L. santolla varied among late juveniles and adults, suggesting that the southern king crab does undergo an ontogenetic diet shift. L. santolla exhibited intraspecific isotopic niche variation, reflecting niche differentiation which allows the species to partition resources. The trophic relationships of L. santolla with the associated fauna suggested some potential interactions for food resources/habitat use when they are limited. This study is the first attempt to characterize the trophic dynamics of the southern king crab in the Cape Horn area and, by generating more data, contributes to the conservation of the king crab population and the long-term management of local fisheries that rely on this resource.
Keywords: Crustacea; trophic ecology; Macrocystis pyrifera; isotopic niche; stable isotopes; stomach content; fisheries; omnivory Crustacea; trophic ecology; Macrocystis pyrifera; isotopic niche; stable isotopes; stomach content; fisheries; omnivory
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MDPI and ACS Style

Andrade, C.; Rivera, C.; Daza, E.; Almonacid, E.; Ovando, F.; Morello, F.; Pardo, L.M. Trophic Niche Dynamics and Diet Partitioning of King Crab Lithodes santolla in Chile’s Sub-Antarctic Water. Diversity 2022, 14, 56. https://doi.org/10.3390/d14010056

AMA Style

Andrade C, Rivera C, Daza E, Almonacid E, Ovando F, Morello F, Pardo LM. Trophic Niche Dynamics and Diet Partitioning of King Crab Lithodes santolla in Chile’s Sub-Antarctic Water. Diversity. 2022; 14(1):56. https://doi.org/10.3390/d14010056

Chicago/Turabian Style

Andrade, Claudia, Cristóbal Rivera, Erik Daza, Eduardo Almonacid, Fernanda Ovando, Flavia Morello, and Luis Miguel Pardo. 2022. "Trophic Niche Dynamics and Diet Partitioning of King Crab Lithodes santolla in Chile’s Sub-Antarctic Water" Diversity 14, no. 1: 56. https://doi.org/10.3390/d14010056

APA Style

Andrade, C., Rivera, C., Daza, E., Almonacid, E., Ovando, F., Morello, F., & Pardo, L. M. (2022). Trophic Niche Dynamics and Diet Partitioning of King Crab Lithodes santolla in Chile’s Sub-Antarctic Water. Diversity, 14(1), 56. https://doi.org/10.3390/d14010056

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