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Benthic decapod crustaceans associated with captures of Munida spp. (Decapoda: Anomura) in the Beagle Channel, Argentina
Pérez-Barros, P.; Tapella, F.; Romero, M.C.; Calcagno, J.; Lovrich, G.A. (2004). Benthic decapod crustaceans associated with captures of Munida spp. (Decapoda: Anomura) in the Beagle Channel, Argentina. Sci. Mar. (Barc.) 68(2): 237-246. https://dx.doi.org/10.3989/scimar.2004.68n2237
In: Scientia Marina (Barcelona). Consejo Superior de Investigaciones Científicas. Institut de Ciènces del Mar: Barcelona. ISSN 0214-8358; e-ISSN 1886-8134, more
Peer reviewed article  

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Keywords
    Aquatic communities > Benthos
    Check lists
    Distribution
    Anomura [WoRMS]; Decapoda [WoRMS]; Munida Leach, 1821 [WoRMS]
    PSW, Argentina, Tierra del Fuego, Beagle Channel [Marine Regions]; PSW, Chile, Magellan Straits [Marine Regions]
    Marine/Coastal

Authors  Top 
  • Pérez-Barros, P.
  • Tapella, F.
  • Romero, M.C.
  • Calcagno, J.
  • Lovrich, G.A.

Abstract
    Benthic decapod crustacean assemblages in the Beagle Channel are dominated by the galatheid crabs Munidasubrugosa and Munida gregaria. This study deals with the bathymetric and spatial distribution, density and diversity of the assemblage of decapod species that co-occur with Munida spp. in the Beagle Channel. A total of 131 samples were obtained using an epibenthic trawl from February 1999 to December 2000. They were taken monthly from two depth strata separated by the 40 m isobath (range: 4-262 m), and from three different sites: Bahía Lapataia, Ushuaia and Punta Segunda. Sixteen of the 36 recorded species of decapod crustaceans from the Beagle Channel were caught. Munidasubrugosa and M. gregaria contributed 94% to the total decapod material. Of the remaining 6%, Austropandalusgrayi (Caridea) was the most abundant species, constituting 43% of the non-galatheid decapod fraction. Some species, namely Paguruscomptus and Eurypodius spp., were characteristic of shallow waters (<40 m), while others like Campylonotus semistriatus occurred in deeper waters (> 40 m). The average density and diversity of non-galatheid decapods varied with depth and location. Decapod diversity correlated positively with the density of algae and polychaete tubes. The influence of three-dimensional bottom structure on decapod diversity in the Beagle Channel is discussed.

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