Geographic variation in Loligo forbesi in the Northeast Atlantic Ocean: analysis of morphometric data and tests of causal hypotheses |
| |
| Authors: | G J Pierce R S Thorpe L C Hastie A S Brierley A Guerra P R Boyle R Jamieson P Avila |
| |
| Institution: | (1) Department of Zoology, University of Aberdeen, Tillydrone Avenue, AB9 2TN Aberdeen, Scotland;(2) Scottish Office Agriculture and Fisheries Department, Victoria Road, P. O. Box 101, AB9 8DB Aberdeen, Scotland;(3) Department of Environmental and Evolutionary Biology, Port Erin Marine Laboratory, University of Liverpool, Port Erin, Isle of Man, British Isles;(4) Instituto de Investigaciones Marinas, Eduardo Cabello 6, E-26208 Vigo, Spain;(5) Present address: School of Biological Sciences, University College of North Wales, LL57 2UW Bangor, Gwynedd, South Wales, Great Britain |
| |
| Abstract: | Geographic 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. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
