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Laboratory culture of the larvae of conus textile gastropoda toxoglossa

Laboratory culture of the larvae of conus textile gastropoda toxoglossa

Journal of Experimental Marine Biology & Ecology 42(1): 27-38

The larvae of the Indo-Pacific gastropod C. textile Linne were reared in the laboratory from hatching through metamorphosis. Larvae fed a mixed phytoplankton culture of Isochrysis galbana and Phaeodactylum tricornutum grew at a rate of 0.06 mm/day and began metamorphosing 16 days after hatching. Unfed control cultures yielded no metamorphically competent larvae. Laboratory-reared larvae metamorphosed spontaneously on the walls of the fiberglass rearing tanks when their average shell length was 1.5 mm. Measurements made on field-collected C. textile juveniles indicate that the larvae metamorphose at the same size in the laboratory as they do in nature. Rates of larval shell length increase and dry weight increase paralleled each other until metamorphosis. At this point, shell growth slowed while dry weight increased suddenly. This weight increase may reflect calcification and strengthening of the fragile larval shell upon entering the benthic environment.

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Accession: 005787613

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