Two contradictory elements determine invertebrate recruitment: dispersion of larvae and spatial restrictions on adults

Authors
Citation
M. Bhaud, Two contradictory elements determine invertebrate recruitment: dispersion of larvae and spatial restrictions on adults, OCEANOL ACT, 23(4), 2000, pp. 409-422
Citations number
66
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Aquatic Sciences
Journal title
OCEANOLOGICA ACTA
ISSN journal
0399-1784 → ACNP
Volume
23
Issue
4
Year of publication
2000
Pages
409 - 422
Database
ISI
SICI code
0399-1784(200007/08)23:4<409:TCEDIR>2.0.ZU;2-3
Abstract
The primary constraint on recruitment results from the difference between t he area throughout which larvae are disseminated and that in which adults l ive. The nature of the life cycle imposes a dispersion phase; the requireme nts of adult life impose a localised habitat for larval settlement. Compati bility between these two types of constraint is required for a species to b e maintained, which means that larval dispersion must be studied with refer ence to habitat conditions. The most important aspect of this search for co mpatibility between two elements is the existence of sterile areas of dispe rsion; they presuppose that successful larval fixation does not necessarily imply successful population recruitment. Many responses, ensuring compatib ility between larval dispersion and the constraints of adult habitat requir ements, have been selected by species to reduce the size of the sterile dis persion area. Finally the shortcomings of traditional studies in benthology , which fail to specify the reproductive capacity of the individuals collec ted, are emphasized. (C) 2000 Ifremer/CNRS/IRD/Editions scientifiques et me dicales Elsevier SAS.