Differences in the exploitation of bream in three shallow lake systems and their relation to water quality

E.H.R.R. Lammens, E.H. van Nes, W.M. Mooij

Research output: Contribution to journalArticleAcademicpeer-review

35 Citations (Scopus)

Abstract

1. The development of bream populations, water transparency, chlorophyll-a concentration, extent of submerged vegetation and densities of the zebra mussel, Dreissena polymorpha, were analysed in three shallow eutrophic lake systems subject to different fish management. 2. In Lake Veluwemeer, the bream population was reduced from c. 100 to 20 kg ha1 after 5 years of fishing. The mortality caused by the fishery was estimated at 38␘f bream >15 cm in addition to a 13␗atural mortality of bream >17 cm. The decline was followed by an expansion of the Chara beds present in the shallow parts, an increase in water transparency in the open-water zone, an increase in the density of zebra mussels and a decrease in chlorophyll-a concentrations. 3. The newly created Lake Volkerak showed trends opposite to those in Lake Veluwemeer. Bream colonised the lake in 1988 and reached a biomass of c. 140 kg ha1 in 1998. The water transparency decreased from a maximum of 3 m to c. 1 m and the chlorophyll-a concentration increased from 5 to 45 g L1. Submerged vegetation colonised up to 20␘f the total lake area in the first 5 years after creation of the lake in 1987 but decreased to 10s turbidity increased. 4. Seine fishery in the Frisian lake system did not appear to affect the bream population despite annual catches as high as 40-50 kg ha1. The estimated natural mortality of fish >15 cm was 15nd mortality by fishery was 26ÐThe high loss was apparently compensated by good recruitment and high growth rates resulting from a c. 1 °C higher water temperature during the years when bream were removed by fishing. There was only a slight decrease in chlorophyll-a concentrations and a slight increase in water transparency. 5. The results of this study suggest that the effects of bream exploitation in eutrophic lakes can vary depending on the efficiency of the fishery, recruitment success and temperature regime. In the absence of fishery, bream dominated the fish community in the study lakes and apparently prevented D. polymorpha and submerged vegetation from establishing because of physical disturbance, enhanced internal P-loading and resettling of resuspended sediments.
LanguageEnglish
Pages2435-2442
JournalFreshwater Biology
Volume47
DOIs
Publication statusPublished - 2002

Fingerprint

bream
water quality
lakes
lake
Dreissena polymorpha
submerged vegetation
transparency
fishery
fisheries
chlorophyll a
chlorophyll
mortality
water
vegetation
fishing
fish
physical disturbance
Chara
open water
turbidity

Keywords

  • aquatic animals
  • fishes
  • ecology
  • water quality
  • lakes
  • netherlands
  • lake ijssel

Cite this

@article{90c3c4de9a084d6c8c15eb6eb2b0760f,
title = "Differences in the exploitation of bream in three shallow lake systems and their relation to water quality",
abstract = "1. The development of bream populations, water transparency, chlorophyll-a concentration, extent of submerged vegetation and densities of the zebra mussel, Dreissena polymorpha, were analysed in three shallow eutrophic lake systems subject to different fish management. 2. In Lake Veluwemeer, the bream population was reduced from c. 100 to 20 kg ha1 after 5 years of fishing. The mortality caused by the fishery was estimated at 38␘f bream >15 cm in addition to a 13␗atural mortality of bream >17 cm. The decline was followed by an expansion of the Chara beds present in the shallow parts, an increase in water transparency in the open-water zone, an increase in the density of zebra mussels and a decrease in chlorophyll-a concentrations. 3. The newly created Lake Volkerak showed trends opposite to those in Lake Veluwemeer. Bream colonised the lake in 1988 and reached a biomass of c. 140 kg ha1 in 1998. The water transparency decreased from a maximum of 3 m to c. 1 m and the chlorophyll-a concentration increased from 5 to 45 g L1. Submerged vegetation colonised up to 20␘f the total lake area in the first 5 years after creation of the lake in 1987 but decreased to 10s turbidity increased. 4. Seine fishery in the Frisian lake system did not appear to affect the bream population despite annual catches as high as 40-50 kg ha1. The estimated natural mortality of fish >15 cm was 15nd mortality by fishery was 26{\DH}The high loss was apparently compensated by good recruitment and high growth rates resulting from a c. 1 °C higher water temperature during the years when bream were removed by fishing. There was only a slight decrease in chlorophyll-a concentrations and a slight increase in water transparency. 5. The results of this study suggest that the effects of bream exploitation in eutrophic lakes can vary depending on the efficiency of the fishery, recruitment success and temperature regime. In the absence of fishery, bream dominated the fish community in the study lakes and apparently prevented D. polymorpha and submerged vegetation from establishing because of physical disturbance, enhanced internal P-loading and resettling of resuspended sediments.",
keywords = "waterkwaliteit, meren, waterdieren, vissen, ecologie, nederland, ijsselmeer, aquatic animals, fishes, ecology, water quality, lakes, netherlands, lake ijssel",
author = "E.H.R.R. Lammens and {van Nes}, E.H. and W.M. Mooij",
year = "2002",
doi = "10.1046/j.1365-2427.2002.01008.x",
language = "English",
volume = "47",
pages = "2435--2442",
journal = "Freshwater Biology",
issn = "0046-5070",
publisher = "Wiley",

}

Differences in the exploitation of bream in three shallow lake systems and their relation to water quality. / Lammens, E.H.R.R.; van Nes, E.H.; Mooij, W.M.

In: Freshwater Biology, Vol. 47, 2002, p. 2435-2442.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Differences in the exploitation of bream in three shallow lake systems and their relation to water quality

AU - Lammens, E.H.R.R.

AU - van Nes, E.H.

AU - Mooij, W.M.

PY - 2002

Y1 - 2002

N2 - 1. The development of bream populations, water transparency, chlorophyll-a concentration, extent of submerged vegetation and densities of the zebra mussel, Dreissena polymorpha, were analysed in three shallow eutrophic lake systems subject to different fish management. 2. In Lake Veluwemeer, the bream population was reduced from c. 100 to 20 kg ha1 after 5 years of fishing. The mortality caused by the fishery was estimated at 38␘f bream >15 cm in addition to a 13␗atural mortality of bream >17 cm. The decline was followed by an expansion of the Chara beds present in the shallow parts, an increase in water transparency in the open-water zone, an increase in the density of zebra mussels and a decrease in chlorophyll-a concentrations. 3. The newly created Lake Volkerak showed trends opposite to those in Lake Veluwemeer. Bream colonised the lake in 1988 and reached a biomass of c. 140 kg ha1 in 1998. The water transparency decreased from a maximum of 3 m to c. 1 m and the chlorophyll-a concentration increased from 5 to 45 g L1. Submerged vegetation colonised up to 20␘f the total lake area in the first 5 years after creation of the lake in 1987 but decreased to 10s turbidity increased. 4. Seine fishery in the Frisian lake system did not appear to affect the bream population despite annual catches as high as 40-50 kg ha1. The estimated natural mortality of fish >15 cm was 15nd mortality by fishery was 26ÐThe high loss was apparently compensated by good recruitment and high growth rates resulting from a c. 1 °C higher water temperature during the years when bream were removed by fishing. There was only a slight decrease in chlorophyll-a concentrations and a slight increase in water transparency. 5. The results of this study suggest that the effects of bream exploitation in eutrophic lakes can vary depending on the efficiency of the fishery, recruitment success and temperature regime. In the absence of fishery, bream dominated the fish community in the study lakes and apparently prevented D. polymorpha and submerged vegetation from establishing because of physical disturbance, enhanced internal P-loading and resettling of resuspended sediments.

AB - 1. The development of bream populations, water transparency, chlorophyll-a concentration, extent of submerged vegetation and densities of the zebra mussel, Dreissena polymorpha, were analysed in three shallow eutrophic lake systems subject to different fish management. 2. In Lake Veluwemeer, the bream population was reduced from c. 100 to 20 kg ha1 after 5 years of fishing. The mortality caused by the fishery was estimated at 38␘f bream >15 cm in addition to a 13␗atural mortality of bream >17 cm. The decline was followed by an expansion of the Chara beds present in the shallow parts, an increase in water transparency in the open-water zone, an increase in the density of zebra mussels and a decrease in chlorophyll-a concentrations. 3. The newly created Lake Volkerak showed trends opposite to those in Lake Veluwemeer. Bream colonised the lake in 1988 and reached a biomass of c. 140 kg ha1 in 1998. The water transparency decreased from a maximum of 3 m to c. 1 m and the chlorophyll-a concentration increased from 5 to 45 g L1. Submerged vegetation colonised up to 20␘f the total lake area in the first 5 years after creation of the lake in 1987 but decreased to 10s turbidity increased. 4. Seine fishery in the Frisian lake system did not appear to affect the bream population despite annual catches as high as 40-50 kg ha1. The estimated natural mortality of fish >15 cm was 15nd mortality by fishery was 26ÐThe high loss was apparently compensated by good recruitment and high growth rates resulting from a c. 1 °C higher water temperature during the years when bream were removed by fishing. There was only a slight decrease in chlorophyll-a concentrations and a slight increase in water transparency. 5. The results of this study suggest that the effects of bream exploitation in eutrophic lakes can vary depending on the efficiency of the fishery, recruitment success and temperature regime. In the absence of fishery, bream dominated the fish community in the study lakes and apparently prevented D. polymorpha and submerged vegetation from establishing because of physical disturbance, enhanced internal P-loading and resettling of resuspended sediments.

KW - waterkwaliteit

KW - meren

KW - waterdieren

KW - vissen

KW - ecologie

KW - nederland

KW - ijsselmeer

KW - aquatic animals

KW - fishes

KW - ecology

KW - water quality

KW - lakes

KW - netherlands

KW - lake ijssel

U2 - 10.1046/j.1365-2427.2002.01008.x

DO - 10.1046/j.1365-2427.2002.01008.x

M3 - Article

VL - 47

SP - 2435

EP - 2442

JO - Freshwater Biology

T2 - Freshwater Biology

JF - Freshwater Biology

SN - 0046-5070

ER -