کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2418963 1104361 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Shoaling behaviour of fish under parasitism and predation risk
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Shoaling behaviour of fish under parasitism and predation risk
چکیده انگلیسی

Shoaling is a common antipredatory adaptation in several fish species. However, parasite infections may alter shoaling behaviour of fish by impairing fish sensory/motor systems and by reducing the net benefit of shoaling. In an experimental study, we investigated whether Diplostomum spathaceum (Trematoda) eye flukes alter shoaling behaviour of rainbow trout, Oncorhynchus mykiss, and if this has an interaction with predation risk. The parasite reduces the vision of fish by inducing cataract formation, which in previous studies has been shown to alter fish escape responses and crypsis. We found that the shoals of infected fish contained fewer individuals and they divided into separate groups more often compared with controls. The difference between infected and control fish in their shoaling behaviour further increased undersimulated avian predation, which increased the cohesiveness of groups in control fish but not in infected fish. These findings suggest that reduced shoaling of D. spathaceum-infected fish may predispose them to predation by birds, and thus provide a potential mechanism to enhance the transmission of this trophically transmitted parasite.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Behaviour - Volume 75, Issue 1, January 2008, Pages 145–150
نویسندگان
, , ,