COMMON BIVALVE LARVAE FROM NEW . . .

New Zealand Journal of Marine and Freshwater Research abstracts

COMMON BIVALVE LARVAE FROM NEW ZEALAND: MYTILACEA

J.D.Booth

Marine Laboratory, Department of Zoology, Victoria University of Wellington, Private Bag, Wellington, New Zealand

Abstract The late stage larvae of five common mytilid bivalves (Mollusca: Pelecypoda: Mytilacea) are described and provisionally identified as Mytilus edulis aoieanus, Modiolus areolatus, Perna canaliculus, Xenostrobus pulex, and Modiolarca impacta. All are readily distinguishable on the basis of larval shell features, including hinge structure. However, one common species, Aulacomya maoriana, was not discerned, and thus the identifications must remain tentative.

The larvae were recovered from plankton samnles from Bay of Islands (35° 15' S, 174° 10' E), Wellington Harbour (41° 16' S, 174° 51' E), and Raumati Beach (40° 56' S, 174° 58' E), New Zealand, during 1970-72. Their seasonal occurrences in the plankton are described and related to the condition index of the adults as far as possible.

N.Z. Journal of Marine and Freshwater Research 11 (3) : 407-40
Received 17 June 1976; revision received 17 February 1977. Fisheries Research Division Publication 304

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