PARENTAL CARE IN TERRESTRIAL GASTROPODS

被引:77
|
作者
BAUR, B
机构
[1] Institute of Zoology, University of Basel, Basel, CH-4051
来源
EXPERIENTIA | 1994年 / 50卷 / 01期
关键词
PARENTAL INVESTMENT; JUVENILE SURVIVAL; EVOLUTION; GASTROPODS; MOLLUSKS; OVOVIVIPARITY; VIVIPARITY;
D O I
10.1007/BF01992042
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Parental care in terrestrial gastropods includes the preparation of oviposition sites, production of large, heavily-yolked eggs supplied with calcium carbonate, provisioning of hatchlings with eggs in species with facultative sibling cannibalism, egg retention, and ovoviviparity. Evidence for true viviparity is scarce in terrestrial gastropods, as it is for postlaying care of eggs, though external egg carrying on the shell occurs in a few species. Care of young has not been-observed in any terrestrial gastropod species. Provisioning of eggs with nutrients and calcium carbonate might be the most common form of parental investment. Ovoviviparity allows terrestrial gastropods to persist in habitats otherwise unsuitable for oviparous species (e.g. exposed rock walls). An interspecific comparison demonstrates that egg-retaining and ovoviviparous species produce smaller clutches than oviparous species and suggests a cost of parental care.
引用
收藏
页码:5 / 14
页数:10
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