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The effect of temperature on the feeding rate of the rough oyster drill, Eupleura caudata (Say)
Manzi, J.J. (1970). The effect of temperature on the feeding rate of the rough oyster drill, Eupleura caudata (Say). Proceedings of the National Shellfisheries Association 60: 54-58
In: Proceedings of the National Shellfisheries Association. Economy Printing: Easton. ISSN 0077-5711, more
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    Marine/Coastal
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  • Manzi, J.J.
Abstract
    Feeding rates of Eupleura caudata (Say) were studied at a series of controlled water temperatures. The negligible consumption of young Crassostrea virginica and Mulinia lateralis at 10.0°C indicates that this temperature is near the lower limit for predatory activity. Feeding rates increased with increasing temperature from 10.0 to 27.5 °C, and decreased when the temperature was increased from 27.5 to 30.0°C. Feeding rates were maximum at 25.0 and 27.5°C. Drills consumed more M. lateralis than C. virginica at all experimental temperatures although physical differences between the prey may account for this disparity. Drills were cannibalistic in the presence of alternative food sources throughout the range of temperature studied. Cannibalism increased as the temperature and feeding rates increased and the highest incidence of cannibalism was at optimum feeding temperatures (25.0 and 27.5°C). Ovipositing drills discriminated between the two prey organisms as substrata for capsular attachment; they deposited egg capsules readily on the valves of C. virginica but only infrequently on the valves of M. lateralis.
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