کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2416650 1104286 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Do gill parasites influence the foraging and antipredator behaviour of rainbow darters, Etheostoma caeruleum?
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Do gill parasites influence the foraging and antipredator behaviour of rainbow darters, Etheostoma caeruleum?
چکیده انگلیسی

Parasites are known to affect an array of characteristics of their hosts, including morphology, physiology and behaviour. We examined the foraging and antipredator behaviour of rainbow darters, Etheostoma caeruleum, that were parasitized by glochidia larvae of freshwater mussels (Ptychobranchus occidentalis and Venustaconcha pleasii: Unionidae). Glochidia attach to the gills of the host and become encapsulated in host tissue. Over a period of days or weeks the larvae develop into free-living juveniles, which then leave the host. Parasitized darters increased ventilation rates (either early in the infestation or at the height of the infestation), were less active during foraging trials, lost more body size than nonparasitized darters and showed significantly weaker responses to predation risk (signalled by the presence of a chemical alarm cue). Therefore, even for a relatively short-term infection, parasitized darters may pay a cost in terms of decreased growth and decreased probability of survival.


► Darters increased ventilation early and at the height of glochidial infestation.
► Parasitized darters decreased activity during foraging trials.
► Darters that were parasitized lost relatively more body size.
► Parasitism weakened responses to predation risk.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Behaviour - Volume 82, Issue 4, October 2011, Pages 817–823
نویسندگان
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