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  Co-existence of a pair of pelagic planktivorous coregonid fishes

Helland, I. P., Harrod, C., Freyhof, J., & Mehner, T. (2008). Co-existence of a pair of pelagic planktivorous coregonid fishes. Evolutionary Ecology Research, 10(3), 373-390.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D6DC-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D6DD-F
Genre: Journal Article

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Helland, I.P. et al., 2008, S-38783.pdf (Publisher version), 294KB
 
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 Creators:
Helland, Ingeborg Palm, Author
Harrod, Chris1, 2, Author              
Freyhof, Jörg, Author
Mehner, Thomas, Author
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              
2Department Evolutionary Genetics, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445635              

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Free keywords: δ¹³C; δ¹⁵N; niche overlap; reproductive isolation; resource competition; stable isotope analysis; stomach content analysis; sympatric species
 Abstract: Hypothesis: Ecological specialization facilitates co-existence of Coregonus spp. in Lake Stechlin. A difference in trophic ecology is the dominant means by which the species are ecologically segregated. Background: Sympatric fish species pairs in post-glacial lakes often feed on different resources, segregating available trophic resources. Organisms: Sympatric European winter-spawning Coregonus albula and the local endemic dwarf-sized spring-spawning Coregonus fontanae. Time and place: March-December 2005, Lake Stechlin, North Germany. Methods: By combining stomach content analyses and stable isotope analyses we compared consumption patterns of the two species at different depths over a 10-month period. Results: Stable isotope analyses and stomach content analyses both showed little trophic difference between the two species, but a significant effect of capture depth and body size on individual diet. Conclusions: The sympatric species pair in Lake Stechlin does not follow the expected pattern of niche segregation. Trophic divergence is not the dominant grounds for co-existence.

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Language(s): eng - English
 Dates: 2008-03
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: eDoc: 366742
Other: 2611/S 38783
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Title: Evolutionary Ecology Research
Source Genre: Journal
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Pages: - Volume / Issue: 10 (3) Sequence Number: - Start / End Page: 373 - 390 Identifier: ISSN: 1522-0613