Reduced byssal thread production and movement by the intertidal mussel<Emphasis Type="Italic"> Hormomya mutabilis</Emphasis> in response to effluent from predators |
| |
Authors: | Email author" target="_blank">So?IshidaEmail author Keiji?Iwasaki |
| |
Institution: | (1) Laboratory of Animal Ecology, Department of Zoology, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan,;(2) Institute for Natural Science, Nara University, Nara, Japan,;(3) , Fukui City Museum of Natural History, Asuwakami-cho, Fukui 918-8006, Japan, |
| |
Abstract: | Laboratory experiments were carried out to investigate byssal thread production by the intertidal mytilid mussel Hormomya mutabilis in response to effluent from the predatory crab Eriphia smithii and the starfish Coscinasterias acutispina. During the early period of the experiment, large H. mutabilis exposed to crab effluent produced a significantly smaller number of functional byssal threads than mussels in crab-free water.
No significant difference in the diameter of threads produced in the two treatments was detected. The number of functional
byssal threads produced by small H. mutabilis exposed to crab effluent did not differ significantly from that of mussels in crab-free water. However, small H. mutabilis exposed to crab effluent tended to discard fewer byssal bundles, that is, they shifted their attaching sites less frequently
than similar mussels in crab-free water. In the presence of waterborne cues from the crab, H. mutabilis tended to reduce both the secretion of byssal threads and movement across the substratum. No significant differences in behaviour
were observed between large mussels exposed to effluent from the starfish and those unexposed. The adaptive significance of
the responses shown by H. mutabilis is discussed in terms of protection against predators differing in foraging behaviour.
Electronic Publication |
| |
Keywords: | Byssal thread production Movement Intertidal mussel Predator effluent Predatory crab Seastar |
本文献已被 SpringerLink 等数据库收录! |
|