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

Diversity ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 56
Author(s):  
Claudia Andrade ◽  
Cristóbal Rivera ◽  
Erik Daza ◽  
Eduardo Almonacid ◽  
Fernanda Ovando ◽  
...  

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.

2020 ◽  
Vol 47 (8) ◽  
pp. 1013-1021
Author(s):  
O. A. Krylovich ◽  
G. G. Boeskorov ◽  
M. V. Shchelchkova ◽  
A. B. Savinetsky

2009 ◽  
Vol 56 (5) ◽  
pp. 812-826 ◽  
Author(s):  
G. Stowasser ◽  
R. McAllen ◽  
G.J. Pierce ◽  
M.A. Collins ◽  
C.F. Moffat ◽  
...  

2010 ◽  
Vol 23 (2) ◽  
pp. 107-116 ◽  
Author(s):  
Jill P. Zamzow ◽  
Craig F. Aumack ◽  
Charles D. Amsler ◽  
James B. McClintock ◽  
Margaret O. Amsler ◽  
...  

AbstractGut contents studies have shown that Notothenia coriiceps, a prevalent shallow water fish species along the western Antarctic Peninsula, has a highly variable diet. This variability, coupled with small home ranges, suggest that microhabitat may play a role in determining the chief prey items of N. coriiceps. We trapped fish from three sites comprised of two different algal microhabitats around Palmer Station, Antarctica and investigated their diets via gut contents and stable isotope analyses. Gut contents analysis revealed that amphipods were the primary prey item at all three sites, but the distribution of amphipod species eaten varied between sites. Other important prey classes were snails, limpets, algae and fish. Overall, the gut content data suggested that algal microhabitat was less important than geographic location in determining diet. On the other hand, stable isotope analysis indicated that fish from the Palmaria decipiens site were more enriched in both carbon and nitrogen than fish from Desmarestia menziesii sites. Hence, it would appear that in the longer term, algal microhabitat may influence fish diets and trophic relationships.


2016 ◽  
Vol 35 (1) ◽  
pp. 191-197 ◽  
Author(s):  
Alejandra Piñón-Gimate ◽  
Mercedes M. Gómez-Valdez ◽  
Alejandra Mazariegos-Villarreal ◽  
Elisa Serviere-Zaragoza

2013 ◽  
Vol 69 (1-2) ◽  
pp. 110-115 ◽  
Author(s):  
J.P. Coelho ◽  
C.L. Mieiro ◽  
E. Pereira ◽  
A.C. Duarte ◽  
M.A. Pardal

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