Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population
Abstract – Production of cannibalistic Arctic char ( Salvelinus alpinus (L.)) and their prey conspecifics were estimated in an allopatric population, situated in an alpine ultraoligotrophic lake in central Norway. Estimates of population abundance were obtained by mark recapture and successive remov...
Published in: | Ecology of Freshwater Fish |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2001
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1034/j.1600-0633.2001.100404.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0633.2001.100404.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0633.2001.100404.x |
id |
crwiley:10.1034/j.1600-0633.2001.100404.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1034/j.1600-0633.2001.100404.x 2024-06-02T08:01:36+00:00 Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population Finstad, A. G. Jansen, P. A. Langeland, L. 2001 http://dx.doi.org/10.1034/j.1600-0633.2001.100404.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0633.2001.100404.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0633.2001.100404.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 10, issue 4, page 220-226 ISSN 0906-6691 1600-0633 journal-article 2001 crwiley https://doi.org/10.1034/j.1600-0633.2001.100404.x 2024-05-03T11:21:10Z Abstract – Production of cannibalistic Arctic char ( Salvelinus alpinus (L.)) and their prey conspecifics were estimated in an allopatric population, situated in an alpine ultraoligotrophic lake in central Norway. Estimates of population abundance were obtained by mark recapture and successive removal experiments. Assuming stable age distribution, we estimated mean yearly biomass (±95% CL) of char in sampled size groups vulnerable to predation (60 to 150 mm) to 7.93 (5.11–14.30) kg · ha −1 . Similarly, mean yearly biomass (±95% CL) of cannibalistic char (> 250 mm) was estimated to 0.62 (0.50–1.06) kg · ha −1 . Annual production (±95% CL) of char in length groups 60 to 150 mm was estimated to be 4.31 (2.74–8.03) kg · ha −1 · year −1 , and production (±95% CL) of cannibalistic char to 0.19 (0.15–0.33) kg · ha −1 · year −1 . Depending on the food conversion factor (set to vary from 0.1 to 0.4), the cannibalistic char removed from 10% to 40% of the production of char in sampled size‐classes vulnerable to predation yearly. The overall ecological efficiency in energy transfer between the prey and predator population was 4.4%. Article in Journal/Newspaper Arctic Salvelinus alpinus Wiley Online Library Arctic Norway Ecology of Freshwater Fish 10 4 220 226 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract – Production of cannibalistic Arctic char ( Salvelinus alpinus (L.)) and their prey conspecifics were estimated in an allopatric population, situated in an alpine ultraoligotrophic lake in central Norway. Estimates of population abundance were obtained by mark recapture and successive removal experiments. Assuming stable age distribution, we estimated mean yearly biomass (±95% CL) of char in sampled size groups vulnerable to predation (60 to 150 mm) to 7.93 (5.11–14.30) kg · ha −1 . Similarly, mean yearly biomass (±95% CL) of cannibalistic char (> 250 mm) was estimated to 0.62 (0.50–1.06) kg · ha −1 . Annual production (±95% CL) of char in length groups 60 to 150 mm was estimated to be 4.31 (2.74–8.03) kg · ha −1 · year −1 , and production (±95% CL) of cannibalistic char to 0.19 (0.15–0.33) kg · ha −1 · year −1 . Depending on the food conversion factor (set to vary from 0.1 to 0.4), the cannibalistic char removed from 10% to 40% of the production of char in sampled size‐classes vulnerable to predation yearly. The overall ecological efficiency in energy transfer between the prey and predator population was 4.4%. |
format |
Article in Journal/Newspaper |
author |
Finstad, A. G. Jansen, P. A. Langeland, L. |
spellingShingle |
Finstad, A. G. Jansen, P. A. Langeland, L. Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population |
author_facet |
Finstad, A. G. Jansen, P. A. Langeland, L. |
author_sort |
Finstad, A. G. |
title |
Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population |
title_short |
Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population |
title_full |
Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population |
title_fullStr |
Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population |
title_full_unstemmed |
Production and predation rates in a cannibalistic Arctic char ( Salvelinus alpinus L.) population |
title_sort |
production and predation rates in a cannibalistic arctic char ( salvelinus alpinus l.) population |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1034/j.1600-0633.2001.100404.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1034%2Fj.1600-0633.2001.100404.x https://onlinelibrary.wiley.com/doi/pdf/10.1034/j.1600-0633.2001.100404.x |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Salvelinus alpinus |
genre_facet |
Arctic Salvelinus alpinus |
op_source |
Ecology of Freshwater Fish volume 10, issue 4, page 220-226 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1034/j.1600-0633.2001.100404.x |
container_title |
Ecology of Freshwater Fish |
container_volume |
10 |
container_issue |
4 |
container_start_page |
220 |
op_container_end_page |
226 |
_version_ |
1800746006067806208 |