Unprotected larval development in the Antarctic scallop Adamussium colbecki (Mollusca: Bivalvia: Pectinidae)

Autor:	Thomas R. Waller, Stephen P. Alexander, Paul Arthur Berkman
Rok vydání:	1991
Předmět:	Larva food.ingredient biology Ecology Pectinidae Marine larval ecology Geology Oceanography biology.organism_classification Bivalvia food Adamussium Yolk Mollusca Ecology Evolution Behavior and Systematics Laternula elliptica
Zdroj:	Antarctic Science. 3:151-157
ISSN:	1365-2079 0954-1020
Popis:	Most Antarctic bivalves are small and protect their young by holding fertilized eggs or larvae in their mantle cavities for varying periods. Nourishment for these early growth stages is provided by yolk reserves rather than by planktotrophy. The anomalously large Antarctic scallop, Adamussium colbecki, has unprotected planktotrophic larvae that are spawned during the austral spring. Successful recruitment of these larvae, in populations which are most abundant in oligotrophic habitats, may be associated with episodic pulses of organic material. Reasons why planktotrophy persists in A. colbecki are suggested by a comparison with another large Antarctic bivalve, Laternula elliptica. The latter has protected lecithotrophic larvae that are released at the beginning of the austral winter. This comparison suggests that unprotected larval development persists in A. colbecki because of unusual anatomical and ecological adaptations among the adults of the Adamussium lineage that have been evolving in the Southern Ocean since the early Oligocene.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8307bb189575352d50fe5ba00985a359 https://doi.org/10.1017/s0954102091000184 Zobrazit plný text záznamu