La. Mackie et Ad. Ansell, DIFFERENCES IN REPRODUCTIVE ECOLOGY IN NATURAL AND TRANSPLANTED POPULATIONS OF PECTEN-MAXIMUS - EVIDENCE FOR THE EXISTENCE OF SEPARATE STOCKS, Journal of experimental marine biology and ecology, 169(1), 1993, pp. 57-75
The seasonal reproductive and storage cycles of scallops, Pecten maxim
us (L.), transplanted as juveniles into the Bay of St. Brieuc, Brittan
y, from Scotland and from the Bay of Brest, were compared with the cyc
les of similar scallops in their areas of origin and with those of nat
ive St. Brieuc scallops. Major features of the reproductive cycle of t
he transplanted scallops remained unchanged from those of their areas
of origin, indicating that genetic factors played a major role in cont
rolling this cycle. In contrast, environmental factors apparently play
ed the dominant role in determining events in the storage cycle. The r
esults provide strong evidence, based on reproductive physiology, for
the existence of partially genetically separated stocks within the Eur
opean distribution of this scallop.