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Morphometric relationships in the Chaetognath Sagitta setosa Müller 1847: within population versus between population variability
Pilar Andreu, Tecla Riera

Sagitta setosa is a neritic Chaetognath exhibiting a discontinuous geographic distribution. To assess the influence of its discontinuous geographic distribution on morphometric variability between isolated populations, we conducted a biometric study of S. setosa from three different locations: Goteborg and Plymouth (North Atlantic) and Barcelona ( Western Mediterranean). Out results do indicate some disparity between the populations that is reflected not in size differences, largely determined by water temperature, but in shape (body proportions).

Keywords: Chetognath, Sagitta setosa, morphometric, variability.
Contents of this volume Sci. Mar. 54(2) : 101-105 Back PDF
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