Jacobson, Philip and Bergström, Ulf and Eklöf, Johan
(2019).
Size-dependent diet composition and feeding of Eurasian perch (Perca fluviatilis) and northern pike (Esox lucius) in the Baltic Sea.
Boreal Environment Research. 24
, 137-153
[Journal article]
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Abstract
To understand food web dynamics, knowledge about factors influencing trophic interactions is fundamental. Using stomach content analysis, we investigated size-dependent predator-prey relations of two coastal predatory fish in the Baltic Sea: perch (Perca fluviatilis) and northern pike (Esox lucius). Perch undergo two ontogenetic diet shifts, from zooplankton to macroinvertebrates at ca. 50 mm; and then to fish at ca. 250 mm. For pike, all sizes (103–810 mm) fed almost exclusively on fish. The fish prey of perch and pike was predominantly three-spined stickleback in spring, and gobiids in late summer. The mean and maximum prey:predator size ratio was larger, while the minimum was smaller for pike compared with perch. Perch and pike fed on smaller-sized gobiids, three-spined and nine-spined stickleback compared within the environment. Our results on size-dependent diets of perch and pike is useful for quantitative analyses of food-web interactions and for ecosystem-based management.
Authors/Creators: | Jacobson, Philip and Bergström, Ulf and Eklöf, Johan |
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Title: | Size-dependent diet composition and feeding of Eurasian perch (Perca fluviatilis) and northern pike (Esox lucius) in the Baltic Sea |
Year of publishing : | 2019 |
Volume: | 24 |
Page range: | 137-153 |
Number of Pages: | 17 |
Publisher: | Boreal Environment Research Publishing Board |
ISSN: | 1239-6095 |
Language: | English |
Publication Type: | Journal article |
Refereed: | Yes |
Article category: | Scientific peer reviewed |
Version: | Published version |
Full Text Status: | Public |
Subjects: | (A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science |
Keywords: | Eurasian perch (Perca fluviatilis), Northern pike (Esox lucius), food web dynamics, trophic interactions, stomach content analysis, size-dependent diets |
URN:NBN: | urn:nbn:se:slu:epsilon-p-102238 |
Permanent URL: | http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-102238 |
ID Code: | 16400 |
Faculty: | NJ - Fakulteten för naturresurser och jordbruksvetenskap |
Department: | (NL, NJ) > Department of Aquatic Resources |
Deposited By: | SLUpub Connector |
Deposited On: | 25 Nov 2019 09:32 |
Metadata Last Modified: | 25 Nov 2019 09:32 |
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