Advanced

Phosphorus Release by Fish in Relation to External and Internal Load in a Eutrophic Lake

Persson, Anders LU (1997) In Limnology and Oceanography 42(3). p.577-583
Abstract
The aim of this study was to compare the rate of phosphorus release from fish with estimates of external and internal load in the eutrophic Finjasjon, Sweden. Phosphorus release from roach and bream, when fed either benthic (Chironomidae) or pelagic (Daphnia) prey, was measured in laboratory tanks. These results were transformed to whole lake conditions by using calculated fish consumption rates of both benthic and pelagic prey based on field data for the community structure, growth rate, and diet of the fish. Phosphorus (P) release from the fish was on the average 0.53 mg P m-2 d-1, which was of the same magnitude (110% of external load) as the external load and 42% of the internal load. Most of the P released from the fish was of pelagic... (More)
The aim of this study was to compare the rate of phosphorus release from fish with estimates of external and internal load in the eutrophic Finjasjon, Sweden. Phosphorus release from roach and bream, when fed either benthic (Chironomidae) or pelagic (Daphnia) prey, was measured in laboratory tanks. These results were transformed to whole lake conditions by using calculated fish consumption rates of both benthic and pelagic prey based on field data for the community structure, growth rate, and diet of the fish. Phosphorus (P) release from the fish was on the average 0.53 mg P m-2 d-1, which was of the same magnitude (110% of external load) as the external load and 42% of the internal load. Most of the P released from the fish was of pelagic origin, being recycled within the water column. Some 18% of the released P was due to benthic feeding, mainly by large bream, thus representing P translocated from the sediment to the water. This last component of the P release constituted 27% of the external and 10% of the internal load. The P release from fish was in a form directly available to phytoplankton, suggesting that P release from fish may be an important nutrient source for algae. (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
Limnology and Oceanography
volume
42
issue
3
pages
577 - 583
publisher
ASLO
ISSN
1939-5590
language
English
LU publication?
yes
id
46040b6e-6ea9-4126-a8dd-b234447dcba8 (old id 1023093)
alternative location
http://www.jstor.org/stable/2838825
date added to LUP
2012-04-20 10:47:15
date last changed
2016-04-16 03:00:15
@article{46040b6e-6ea9-4126-a8dd-b234447dcba8,
  abstract     = {The aim of this study was to compare the rate of phosphorus release from fish with estimates of external and internal load in the eutrophic Finjasjon, Sweden. Phosphorus release from roach and bream, when fed either benthic (Chironomidae) or pelagic (Daphnia) prey, was measured in laboratory tanks. These results were transformed to whole lake conditions by using calculated fish consumption rates of both benthic and pelagic prey based on field data for the community structure, growth rate, and diet of the fish. Phosphorus (P) release from the fish was on the average 0.53 mg P m-2 d-1, which was of the same magnitude (110% of external load) as the external load and 42% of the internal load. Most of the P released from the fish was of pelagic origin, being recycled within the water column. Some 18% of the released P was due to benthic feeding, mainly by large bream, thus representing P translocated from the sediment to the water. This last component of the P release constituted 27% of the external and 10% of the internal load. The P release from fish was in a form directly available to phytoplankton, suggesting that P release from fish may be an important nutrient source for algae.},
  author       = {Persson, Anders},
  issn         = {1939-5590},
  language     = {eng},
  number       = {3},
  pages        = {577--583},
  publisher    = {ASLO},
  series       = {Limnology and Oceanography},
  title        = {Phosphorus Release by Fish in Relation to External and Internal Load in a Eutrophic Lake},
  volume       = {42},
  year         = {1997},
}