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Heavy loads of para...
Heavy loads of parasitic freshwater pearl mussel (Margaritifera margaritifera L.) larvae impair foraging, activity and dominance performance in juvenile brown trout (Salmo trutta L.)
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- Filipsson, Karl (author)
- Karlstads universitet,Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Institutionen för miljö- och livsvetenskaper (from 2013)
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- Petersson, Tina (author)
- Karlstads universitet,Institutionen för miljö- och livsvetenskaper (from 2013)
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- Höjesjö, Johan, 1967 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Piccolo, John, 1964- (author)
- Karlstads universitet,Institutionen för miljö- och livsvetenskaper (from 2013)
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- Näslund, Joacim, 1985 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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- Wengström, Niklas, 1969 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Göteborgs universitet; Swedish Anglers Assoc, Gothenburg,
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- Österling, Martin, 1970- (author)
- Karlstads universitet,Institutionen för miljö- och livsvetenskaper (from 2013)
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(creator_code:org_t)
- 2016-11-28
- 2018
- English.
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In: Ecology of Freshwater Fish. - : Wiley. - 0906-6691 .- 1600-0633. ; 27:1, s. 70-77
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https://doi.org/10.1...
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Abstract
Subject headings
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- © 2016 John Wiley & Sons A/S.The life cycle of the endangered freshwater pearl mussel (Margaritifera margaritifera) includes a parasitic larval phase (glochidia) on the gills of a salmonid host. Glochidia encystment has been shown to affect both swimming ability and prey capture success of brown trout (Salmo trutta), which suggests possible fitness consequences for host fish. To further investigate the relationship between glochidia encystment and behavioural parameters in brown trout, pairs (n = 14) of wild-caught trout (infested vs. uninfested) were allowed to drift feed in large stream aquaria and foraging success, activity, agonistic behaviour and fish coloration were observed. No differences were found between infested and uninfested fish except for in coloration, where infested fish were significantly darker than uninfested fish. Glochidia load per fish varied from one to several hundred glochidia, however, and high loads had significant effects on foraging, activity and behaviour. Trout with high glochidia loads captured less prey, were less active and showed more subordinate behaviour than did fish with lower loads. Heavy glochidia loads therefore may negatively influence host fitness due to reduced competitive ability. These findings have implications not only for management of mussel populations in the streams, but also for captive breeding programmes which perhaps should avoid high infestation rates. Thus, low levels of infestation on host fish which do not affect trout behaviour but maintains mussel populations may be optimal in these cases.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Keyword
- Behaviour
- Brown trout
- Glochidia
- Host
- Parasite
- Biology
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Filipsson, Karl
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Petersson, Tina
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Höjesjö, Johan, ...
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Piccolo, John, 1 ...
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Näslund, Joacim, ...
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Wengström, Nikla ...
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Österling, Marti ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
- Articles in the publication
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Ecology of Fresh ...
- By the university
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University of Gothenburg
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Karlstad University