The effects of cavity length on nest size, sex ratio and mortality of Centris (Heterocentris) analis (Hymenoptera, Apidae, Centridini)

被引:21
作者
Alonso, Juliana D. S. [1 ]
Silva, Janaina F. [1 ]
Garofalo, Carlos A. [1 ]
机构
[1] Fac Filosofia Ciencias & Letras Ribeirao Preto US, Dept Biol, BR-14040901 Ribeirao Preto, SP, Brazil
关键词
Centris analis; trap-nest; sex ratio; immature mortality; natural enemy; CASHEW ANACARDIUM-OCCIDENTALE; BEES HYMENOPTERA; SEMIDECIDUOUS FOREST; CRESSON HYMENOPTERA; HABITAT PREFERENCES; LEAFCUTTING BEES; APIS-MELLIFERA; BODY-SIZE; POLLINATORS; MEGACHILIDAE;
D O I
10.1007/s13592-011-0110-0
中图分类号
Q96 [昆虫学];
学科分类号
摘要
This study investigated the effects of different cavity lengths in trap-nests on the number of cells constructed per nest, sex ratio and mortality of offspring of Centris analis at three sites in Ribeiro Preto, So Paulo, Brazil. Cavity length did not affect the occupation rates of the trap-nests, with the exception of a preference for the shortest trap-nests found at one site. The number of cells per nest increased with trap-nest length. Cavity length affected neither brood cell size, the arrangement of sexes in the nests, nor the rates of immature mortality from parasitism or other causes, with the exception of one case. Cavity length influenced the sex ratio of offspring, with male-biased sex ratios decreasing as the length of the trap-nest increased. This study showed that an increase in the production of C. analis females can be achieved by increasing trap-nest length.
引用
收藏
页码:436 / 448
页数:13
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