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Title

Geographic variation in Loligo forbesi in the Northeast Atlantic Ocean: analysis of morphometric data and tests of causal hypotheses

AuthorsPierce, Graham J.; Thorpe, Roger S.; Hastie, Lee C.; Brierley, A. S.; Guerra, Ángel ; Boyle, Peter R.; Jamlison, R.; Avila, P.
Issue Date1994
PublisherSpringer
CitationMarine Biology 119(4): 541-547 (1994)
AbstractGeographic variation in the squid Loligo forbesi was investigated using multivariate analysis of morphometric and meristic characters in samples of squid taken from 13 localities in the Northeast Atlantic Ocean. Two character sets, body morphometrics and beak morphometrics, indicated similar patterns of variation, with squid from the Azores differing markedly from those on the continental shelf. No consistent pattern was apparent in meristic data. Partial Mantel tests indicated that similarity matrices for morphological data were significantly correlated with distance matrices for (a) geographic proximity, (b) whether the capture site was on the continental shelf or the Azorean bank, and (c) (beak data only) average seasurface temperature at site of capture. Partial Mantel tests on allozyme data for the same individuals support hypothesis (b). The results suggest that L. forbesi in the Azores may reasonably be regarded as a distinct stock, differing significantly from L. forbesi on the continental shelf.
Description7 páginas, 4 figuras, 3 tablas.-- The original publication is available at www.springerlink.com
Publisher version (URL)http://dx.doi.org/10.1007/BF00354316
URIhttp://hdl.handle.net/10261/53743
DOI10.1007/BF00354316
ISSN0025-3162
E-ISSN1432-1793
Appears in Collections:(IIM) Artículos
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