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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2013年50 No.1

Preliminary investigation of predation of the snail Bradybaena ravida by larvae of the firefly Pyrocoelia pectoralis
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Key Words:firefly, Pyrocoelia pectoralis, predation, extract of digestive tract, lethal effect
Abstract:

In order to explore the mechanism of predation of the snail Bradybaena ravida Benson by larvae of the firefly Pyrocoelia pectoralis Oliver, fourth instar larvae were dissected to observe the structure of the larval digestive tract. The larval gullet was separated into two branches near the ossified structure at the base of the mandibles and connected with both

tubular canals in the mandibles. No poison gland was found. B. ravida which were injected with larval midgut extract survived for a significantly shorter period than those injected with larval head extracts or extracts from other parts of the digestive tract (df=68, P<005). The survival time of snails injected with 5 mg/mL of larval midgut extract (1596±4

48) min was the most similar to the normal duration of predation of these snails by P. pectoralis larvae (1447±232) min.

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