Morphological differentiation between geographically separated populations of Neomysis integer and Mesopodopsis slabberi (Crustacea, Mysida)
Remerie, T.; Bourgois, T.; Vanreusel, A. (2005). Morphological differentiation between geographically separated populations of Neomysis integer and Mesopodopsis slabberi (Crustacea, Mysida). Hydrobiologia 549(1): 239-250. https://dx.doi.org/10.1007/s10750-005-5438-x
In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117
Related to:
Remerie, T.; Bourgois, T.; Vanreusel, A. (2005). Morphological differentiation between geographically separated populations of Neomysis integer and Mesopodopsis slabberi (Crustacea, Mysida), in: Remerie, T. Molecular diversity and population structure of two mysid taxa along European coasts = Moleculaire diversiteit en populatiestructuur van twee taxa aasgarnalen langsheen Europese kusten. pp. 145-174, more
Morphological variation was examined in Neomysis integer and Mesopodopsis slabberi, two abundant, low dispersal mysid species (Crustacea, Mysida) along the European coasts. Both species dominate the hyperbenthic communities in the northeast Atlantic, and M. slabberi is also widely distributed in the Mediterranean and Black Sea. Three populations of these species were sampled throughout their distribution range; samples of N. integer were collected in the northeast Atlantic Eems-Dollard, Gironde and Guadalquivir estuaries; in the case of M. slabberi, mysids were sampled in two northeast Atlantic estuaries (Eems-Dollard and Guadalquivir) and one Mediterranean site (Ebro Delta). A total of 12 morphometric and 2 meristic characters were measured from 30-64 mysids per sample. Multivariate analysis showed clear morphometric differences between populations of both species. The morphological differentiation within M. slabberi was highly concordant with the available genetic data from mitochondrial loci, pointing to a large divergence between the Atlantic and Mediterranean populations. However, due to some overlap of individuals between the different populations, the present morphometric analysis does not suffice to assign the different populations to a separate (sub)species status. In the case of N. integer, the morphometric patterns showed a divergence of the Gironde population. Differentiation of populations within this mysid, as in M. slabberi, were mainly related to eye and telson morphology. Potential interactions of the mysid morphology and environmental conditions are discussed.
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