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Evaluating stocking of YOY pike Esox lucius as a tool in the restoration of shallow lakes

Skov, Christian and Nilsson, Anders LU (2007) In Freshwater Biology 52(9). p.1834-1845
Abstract
1. Stocking of piscivores in shallow, eutrophicated lakes to reduce cyprinid densities is a common approach in lake restorations. Young-of-the-year (YOY) pike Esox lucius are frequently used to reduce cyprinid densities, but their effectiveness is equivocal. This study uses a simple model to assess the efficacy of pike stocking as a lake restoration tool. 2. The model evaluates YOY pike consumption in relation to different survival and growth patterns, timing of stocking, degree of piscivory of pike as well as YOY cyprinid growth patterns and productivity. The parameters used in the model are obtained from field surveys in eight study lakes stocked with YOY pike as well as from the literature. 3. Our model showed that all parameters... (More)
1. Stocking of piscivores in shallow, eutrophicated lakes to reduce cyprinid densities is a common approach in lake restorations. Young-of-the-year (YOY) pike Esox lucius are frequently used to reduce cyprinid densities, but their effectiveness is equivocal. This study uses a simple model to assess the efficacy of pike stocking as a lake restoration tool. 2. The model evaluates YOY pike consumption in relation to different survival and growth patterns, timing of stocking, degree of piscivory of pike as well as YOY cyprinid growth patterns and productivity. The parameters used in the model are obtained from field surveys in eight study lakes stocked with YOY pike as well as from the literature. 3. Our model showed that all parameters studied were important for predicting the effects of pike stocking on cyprinids. In particular, body size at stocking, cyprinid production and pike survival were good predictors of biomanipulation success. 4. However, our model showed that only under very specific circumstances will stocking of YOY pike result in a reduction of YOY cyprinid densities large enough to affect water quality. 5. The findings of this study question the efficacy of pike stocking as an appropriate and reliable tool for restoration programmes in shallow lakes, and indicate that when used efforts should be made to optimize the timing of stocking in relation to YOY cyprinid production and to increase the stocking body size of the pike. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
cyprinid reduction, biomanipulation, ecosystem services, model, evaluation
in
Freshwater Biology
volume
52
issue
9
pages
1834 - 1845
publisher
Wiley-Blackwell
external identifiers
  • wos:000248960100016
  • scopus:34547772048
ISSN
0046-5070
DOI
10.1111/j.1365-2427.2007.01795.x
language
English
LU publication?
yes
id
bd38b752-b3ff-472d-964c-06617863a3c5 (old id 689037)
date added to LUP
2008-01-03 08:17:48
date last changed
2017-07-30 04:35:56
@article{bd38b752-b3ff-472d-964c-06617863a3c5,
  abstract     = {1. Stocking of piscivores in shallow, eutrophicated lakes to reduce cyprinid densities is a common approach in lake restorations. Young-of-the-year (YOY) pike Esox lucius are frequently used to reduce cyprinid densities, but their effectiveness is equivocal. This study uses a simple model to assess the efficacy of pike stocking as a lake restoration tool. 2. The model evaluates YOY pike consumption in relation to different survival and growth patterns, timing of stocking, degree of piscivory of pike as well as YOY cyprinid growth patterns and productivity. The parameters used in the model are obtained from field surveys in eight study lakes stocked with YOY pike as well as from the literature. 3. Our model showed that all parameters studied were important for predicting the effects of pike stocking on cyprinids. In particular, body size at stocking, cyprinid production and pike survival were good predictors of biomanipulation success. 4. However, our model showed that only under very specific circumstances will stocking of YOY pike result in a reduction of YOY cyprinid densities large enough to affect water quality. 5. The findings of this study question the efficacy of pike stocking as an appropriate and reliable tool for restoration programmes in shallow lakes, and indicate that when used efforts should be made to optimize the timing of stocking in relation to YOY cyprinid production and to increase the stocking body size of the pike.},
  author       = {Skov, Christian and Nilsson, Anders},
  issn         = {0046-5070},
  keyword      = {cyprinid reduction,biomanipulation,ecosystem services,model,evaluation},
  language     = {eng},
  number       = {9},
  pages        = {1834--1845},
  publisher    = {Wiley-Blackwell},
  series       = {Freshwater Biology},
  title        = {Evaluating stocking of YOY pike Esox lucius as a tool in the restoration of shallow lakes},
  url          = {http://dx.doi.org/10.1111/j.1365-2427.2007.01795.x},
  volume       = {52},
  year         = {2007},
}