CLUTCH SIZE IN A PARASITOID WASP - A MANIPULATION EXPERIMENT

被引:171
作者
HARDY, ICW
GRIFFITHS, NT
GODFRAY, HCJ
机构
[1] UNIV LONDON IMPERIAL COLL SCI & TECHNOL, DEPT BIOL, SILWOOD PK, ASCOT SL5 7PY, BERKS, ENGLAND
[2] UNIV LONDON IMPERIAL COLL SCI & TECHNOL, NERC, CTR POPULAT BIOL, ASCOT SL5 7PY, BERKS, ENGLAND
关键词
CLUTCH SIZE; PARASITOID; BETHYLIDAE;
D O I
10.2307/5515
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
1. The reproductive behaviour of a small, gregarious, ectoparasitoid wasp (Goniozus nephantidis (Muesebeck)) in the family Bethylidae was studied in the laboratory. The wasp lays a clutch of up to 20 eggs, with a very female-biased sex ratio, on the caterpillars of microlepidopterans. 2. Clutch size was strongly influenced by host size. 3. Clutches of different size were artificially created on hosts of approximately the same weight. The manipulations had little effect on juvenile survival, but adult female size decreased strongly with clutch size. Male size was also affected, although to a lesser extent. 4. In the laboratory, larger females lived longer and laid more eggs when provided with hosts. When deprived of hosts, smaller females lived slightly longer. 5. The possibility of using laboratory experiments to test clutch size models is discussed.
引用
收藏
页码:121 / 129
页数:9
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