Genetically-based variation between two spider populations in foraging behavior.
作者： Ann V. Hedrick , Susan E. Riechert
DOI: 10.1007/BF00380078
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摘要: Optimal foraging theory is based on the assumption that at least some aspects of behavior are genetically determined (Pyke et al. 1977; Kamil and Sargent 1980; Pyke 1984). Nonetheless, very few studies have examined role genetics in behavior. Here, we report geographical differences a spider (Agelenopsis aperta) investigate whether these determined. Field were conducted two different populations A. aperta: one residing desert riparian habitat, other grassland habitat. Data from spiders' natural encounters with prey demonstrated spiders exhibited higher frequency attack than towards 13 15 types, including crickets ants. Grassland also had shorter latencies to 12 ants, spiders. Subsequently, reared under controlled conditions laboratory observed their interactions determine populational found field could be genetic. Again, showed latency (crickets, ants) These not significantly affected by hunger state or age Finally, second generation (F2) previous due genetic effects maternal effects. As before, (crickets) We conclude between aperta probably resulted either selection acting directly prey, traits which correlated
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