Abstract
Postlarval lobsters (4th–7th stage) exclusively fed frozen brine shrimp (Artemia saline) were assayed for food-search response to extracts and metabolites from four common prey: soft clams (Mya arenaria), blue mussels (Mytilus edulis), rock crabs (Cancer irroratus), and sea stars (Asterias vulgaris). Concentrations of soluble primary amines, protein, and ammonia in prey tissues and metabolites were determined. No significant responses were observed for any prey metabolites diluted to 1 and 10%, while onlyA. vulgaris evoked a significant response at full strength, suggesting that predatorily naive lobsters have yet to develop more pronounced chemosensory responses shown by field-collected lobsters. Removal of protein with retention of small-molecular-weight polar molecules did not appear to affect response to prey extracts. EC50s, as micromoles per liter amines, computed from prey extract dose-response curves indicate differences per unit amine between prey extracts, withA. vulgaris extract more potent as an attractant than either bivalve extract.C. irroratus extract was equally attractive as the other three extracts. Ammonia levels excreted into seawater over 3 hr were similar for all prey species, while soluble primary amines and proteins were undetectable. Ammonia and protein per gram whole prey varied significantly between extracts of prey species, while primary amines were similar. Lobsters may be attracted preferentially to carrion species with higher concentrations of amines and/or higher potency of attractants per unit amine.
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Daniel, P.C., Bayer, R.C. Attraction of predatorily naive postlarval lobsters to extracts of metabolites of common prey:Mytilus edulis, Mya arenaria, Cancer irroratus, andAsterias vulgaris . J Chem Ecol 13, 1201–1215 (1987). https://doi.org/10.1007/BF01020549
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DOI: https://doi.org/10.1007/BF01020549