The risk of being at the top: foot-cropping in the New Zealand cockle Austrovenus stutchburyi
作者： Kim N. Mouritsen , Robert Poulin
DOI: 10.1017/S0025315403007409H
关键词: Agronomy 、 Cropping 、 Austrovenus 、 Ecology 、 Austrovenus stutchburyi 、 Foot (unit) 、 Population 、 Predation 、 Biology 、 Veneridae 、 Cockle
摘要: The common phenomenon of sublethal predation in soft-bottom bivalves usually involves nipping siphons. Here we show that foot cropping, hitherto documented only Donax spp., is widespread the New Zealand cockle Austrovenus stutchburyi (Veneridae). Depending on locality, cropping frequency ranged between 14 and 34% cockles, average proportion area cropped nine 21%. Estimates biomass lost to croppers at time sampling varied 235 2040 mg ww m -2 . It emphasized likely affect population dynamics cockles.
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