期刊
BRAIN BEHAVIOR AND EVOLUTION
卷 86, 期 1, 页码 58-74出版社
KARGER
DOI: 10.1159/000438449
关键词
Behavior; Cone snails; Conotoxins; Evolution; Piscivory; Prey shifts; Venoms
资金
- National Institute of General Medical Sciences [GM048677]
- Russian Foundation of Basic Research [RFBR 14-04-31048 Mol-A]
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [P01GM048677] Funding Source: NIH RePORTER
The venomous fish-hunting cone snails (Conus) comprise eight distinct lineages evolved from ancestors that preyed on worms. In this article, we attempt to reconstruct events resulting in this shift in food resource by closely examining patterns of behavior, biochemical agents (toxins) that facilitate prey capture and the combinations of toxins present in extant species. The first sections introduce three different hunting behaviors associated with piscivory: 'taser-and-tether', 'net-engulfment' and 'strike-and-stalk'. The first two fish-hunting behaviors are clearly associated with distinct groups of venom components, called cabals, which act in concert to modify the behavior of prey in a specific manner. Derived fish-hunting behavior clearly also correlates with physical features of the radular tooth, the device that injects these biochemical components. Mapping behavior, biochemical components and radular tooth features onto phylogenetic trees shows that fish-hunting behavior emerged at least twice during evolution. The system presented here may be one of the best examples where diversity in structure, physiology and molecular features were initially driven by particular pathways selected through behavior. (C) 2015 S. Karger AG, Basel
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