Decapods associated with the southern king crab (Lithodes santolla) fishery in central patagonia (44? s, chile)
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Date
Authors
DE LOS RIOS ESCALANTE, PATRICIO RENE
Figueroa-Muñoz, Guillermo
Molinet, Carlos Alberto
Díaz, Manuel
De Los Ríos Escalante, Patricio R.
Figueroa-Muñoz, Guillermo
Molinet, Carlos Alberto
Díaz, Manuel
De Los Ríos Escalante, Patricio R.
Authors
Date
Datos de publicación:
10.3390/jmse9121353
Keywords
Bathymetric Pattern - Biodiversity - Crustacean Assemblage - Inner Seas
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Abstract
The southern king crab, Lithodes santolla, is an important fishery resource in the inner seas of Chilean Patagonia. The fishing gear used to catch southern king crab (bait trap) and its operation at different depths over several months provide the opportunity to gather information about relative abundance. The aim of the present study was to analyze the information collected from the catches of southern king crab and its associated fauna in the Magdalena Fjord to study the biodiversity and ecology of scavenging decapod crustaceans. Specifically, the study aimed to determine the bathymetric patterns of abundance by species, to model the abundance by season (winter and spring) and to determine the structuring pattern of scavenging decapods assemblage. Samples were collected between June and November 2019 by deploying traps in four bathymetric strata: 1 = 0 50 m; 2 = 51 100 m; 3 =101 150 m; 4 = 151 200 m. We registered a total of 673 decapod specimens associated with the southern king crab fishery, representing five species: Lithodes santolla (n = 96), Libidoclaea smithii (n = 10), Metacarcinus edwardsii (n = 58), Munida gregaria (n = 507) and Peltarion spinulosum (n = 2). The abundance of decapod species varied by month and bathymetric strata. We found bathymetric patterns for L. santolla abundance, M. gregaria, M. edwardsii, and total species abundance. The most informative model to explain scavenging decapod abundance by generalized linear model (GLM) included species and season. The null model of species cooccurrence analysis revealed that all species associations during the sampled months were random. Our study is the first that provides evidence about patterns of bathymetrical and temporal variation of scavenging decapod abundance and expands the body of knowledge regarding the biodiversity of scavenger decapods in the Magdalena Sound. © 2021 Elsevier B.V., All rights reserved.
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Keywords
Bathymetric Pattern , Biodiversity , Crustacean Assemblage , Inner Seas
Citation
10.3390/jmse9121353