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Small-scale distribution characteristics of Munida spp. populations (Decapoda: Anomura) off the Catalan coasts (western Mediterranean)

AuthorsHuguet, Carme ; Maynou, Francesc ; Abelló, Pere
KeywordsSpatial distribution
Population structure
Habitat partitioning
Western Mediterranean
Issue DateApr-2005
CitationJournal of Sea Research 53(4): 283-296 (2005)
AbstractThe small-scale distribution characteristics of three species of the anomuran genus Munida, namely Munida rutllanti, Munida intermedia and Munida tenuimana, have been studied on the lower shelf and upper-middle continental slope near the coasts of Tarragona and the Ebro delta region in the western Mediterranean. The differential bathymetric distribution showed that a fair degree of overlap exists between M. rutllanti and M. intermedia, with the former being mainly found at shallower depths. The size population structure of the three species showed that polymodality, as indicative of a longer life-span and of a higher degree of population structuring was more evident in the deeper-living species, whereas unimodality, as an indication of a recruitment dependent population, was more evident in the shallowest-occurring species. Geostatistics have been applied to determine the degree of spatial variability occurring in M. intermedia abundance, the better-sampled species. The Mantel test has been used to assess the significance of the overlap between the three species distributions as well as the relation between certain population parameters. A discussion on the population characteristics of M. rutllanti is made in relation with its expansion along the western Mediterranean in the last decades.
Description14 pages, 7 figures, 1 table
Publisher version (URL)http://dx.doi.org/10.1016/j.seares.2004.11.001
Appears in Collections:(ICM) Artículos
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