MEPS 225:299-310 (2002)  -  doi:10.3354/meps225299

Techniques for the identification of bivalve larvae

Elizabeth D. Garland, Cheryl Ann Zimmer*

Biology Department and Applied Ocean Physics and Engineering Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA
*Corresponding author. Previously published as Cheryl Ann Butman. Present address: Department of Biology, University of California, 621 Charles E. Young Dr. South, Los Angeles, CA, 90095-1606, USA. Email:

ABSTRACT: Quantification of planktonic larval distributions has been limited by processing time, given the large numbers of samples generated by extensive field surveys. Until recently, the only technique available for reliable species identification of bivalve larvae was direct microscopic observation, but even this method is restricted to larval stages and species that can be distinguished morphologically. Molecular methods (e.g. antibody and oligonucleotide markers) show considerable promise for identifying bivalve larvae to species, regardless of developmental stage, alleviating ambiguity or subjectivity of some traditional, morphology-based taxonomy. Moreover, attaching species-specific molecular probes to fluorescent reporter tags, for example, has great potential for automated, expedited sample-processing. Optical identification techniques are promising, but probably not at the species level. Current methods of distinguishing bivalve larvae‹morphological, molecular (i.e. immunological and DNA-based), or optical‹are reviewed here to facilitate the selection of appropriate techniques for a given research problem and to stimulate the development of creative alternative approaches for rapid and accurate species identification.

KEY WORDS: Bivalve larvae · Species identification · Immunofluorescent probes · Oligonucleotide probes · Molecular markers

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