The role of an estuary environment for regeneration of claws in the American lobster, Homarus americanus H.Milne Edwards, 1837 (Decapoda)

Citation
M. Moriyasu et al., The role of an estuary environment for regeneration of claws in the American lobster, Homarus americanus H.Milne Edwards, 1837 (Decapoda), CRUSTACEANA, 72, 1999, pp. 415-433
Citations number
45
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Aquatic Sciences
Journal title
CRUSTACEANA
ISSN journal
0011-216X → ACNP
Volume
72
Year of publication
1999
Part
4
Pages
415 - 433
Database
ISI
SICI code
0011-216X(199906)72:<415:TROAEE>2.0.ZU;2-M
Abstract
The life history of the American lobster, Homarus americanus, has been stud ied in the Bideford River estuary, Malpeque Bay, on the northern shore of P rince Edward Island, Canada. Lobsters migrate into the bay in early summer and two distinct moultings take place in May-June and in September. Lobster s with missing claws moult in both seasons, while uninjured individuals mai nly moult in May-June. Neither uninjured lobsters nor individuals with miss ing claws larger than 43 mm CL moult twice a year in the estuary. A high pe rcentage (30-40%) of individuals has missing claws in summer and the percen tage of animals with regenerated small claws increases towards October-Nove mber After the regeneration of missing claws, lobsters appear to emigrate t o deeper water outside the bay. The estuarine environment might be used as a moulting and regenerating area for injured animals in spring-fall. Conver sely, this environment does not appear to sustain high reproductive activit ies, because a low prevalence of mature females is observed throughout the year in this environment. These findings reveal the diversity of habitats u sed by different stages and groups of lobsters, especially the importance o f an estuarine environment for moulting of claw regenerating lobsters.