Advanced

Human impact on the fish diversity in the four largest lakes of Sweden

Degerman, Eva LU ; Hammar, Johan; Nyberg, Per and Svardson, Gunnar (2001) In Ambio 30(8). p.522-528
Abstract
The four largest Swedish lakes, Vanern, Vattern, Malaren, Hjalmaren, host important commercial fisheries for char, salmon, trout, whitefish, vendace (cisco), perch, pike-perch, pike and eel, i.e. highly diverse biological resources. Case studies illustrate physical, chemical and biological impacts on some of these commercial species caused by constructions of dams and ship canals, eutrophication, and overexploitation. Although some original species have been lost and a few new species have been added, the recent human interference has basically caused major shifts in dominance of the fish community structures because of eutrophication, alterations in the abundance of eel or crayfish, and due to overfishing. The latter is in some cases... (More)
The four largest Swedish lakes, Vanern, Vattern, Malaren, Hjalmaren, host important commercial fisheries for char, salmon, trout, whitefish, vendace (cisco), perch, pike-perch, pike and eel, i.e. highly diverse biological resources. Case studies illustrate physical, chemical and biological impacts on some of these commercial species caused by constructions of dams and ship canals, eutrophication, and overexploitation. Although some original species have been lost and a few new species have been added, the recent human interference has basically caused major shifts in dominance of the fish community structures because of eutrophication, alterations in the abundance of eel or crayfish, and due to overfishing. The latter is in some cases caused by the Great Lake Fishery Paradox--in an environment with several predators and competitors, but with ample food resources, especially salmonid fish but also species like pike-perch may adapt a life history favoring growth over sexual maturation. If harvested at a conventional size these populations will decline rapidly due to too small spawning stocks. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ambio
volume
30
issue
8
pages
522 - 528
publisher
Springer
external identifiers
  • pmid:11878026
ISSN
0044-7447
language
English
LU publication?
yes
id
de45b8ab-d0a3-4851-bd5c-8942a6929024 (old id 1122475)
date added to LUP
2008-06-26 12:06:15
date last changed
2016-04-16 05:24:08
@article{de45b8ab-d0a3-4851-bd5c-8942a6929024,
  abstract     = {The four largest Swedish lakes, Vanern, Vattern, Malaren, Hjalmaren, host important commercial fisheries for char, salmon, trout, whitefish, vendace (cisco), perch, pike-perch, pike and eel, i.e. highly diverse biological resources. Case studies illustrate physical, chemical and biological impacts on some of these commercial species caused by constructions of dams and ship canals, eutrophication, and overexploitation. Although some original species have been lost and a few new species have been added, the recent human interference has basically caused major shifts in dominance of the fish community structures because of eutrophication, alterations in the abundance of eel or crayfish, and due to overfishing. The latter is in some cases caused by the Great Lake Fishery Paradox--in an environment with several predators and competitors, but with ample food resources, especially salmonid fish but also species like pike-perch may adapt a life history favoring growth over sexual maturation. If harvested at a conventional size these populations will decline rapidly due to too small spawning stocks.},
  author       = {Degerman, Eva and Hammar, Johan and Nyberg, Per and Svardson, Gunnar},
  issn         = {0044-7447},
  language     = {eng},
  number       = {8},
  pages        = {522--528},
  publisher    = {Springer},
  series       = {Ambio},
  title        = {Human impact on the fish diversity in the four largest lakes of Sweden},
  volume       = {30},
  year         = {2001},
}