Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes
Previous research indicated that fish populations in arctic lakes maintain a constant size distribution and abundance in the face of the environmental variability experienced over their recent history. Such stability was tested over 15 seasons in Little Nauyuk and Gavia lakes (Northwest Territories)...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1994
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f94-023 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-023 |
id |
crcansciencepubl:10.1139/f94-023 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f94-023 2024-04-07T07:49:38+00:00 Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes Johnson, Lionel 1994 http://dx.doi.org/10.1139/f94-023 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-023 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 1, page 209-225 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1994 crcansciencepubl https://doi.org/10.1139/f94-023 2024-03-08T00:37:42Z Previous research indicated that fish populations in arctic lakes maintain a constant size distribution and abundance in the face of the environmental variability experienced over their recent history. Such stability was tested over 15 seasons in Little Nauyuk and Gavia lakes (Northwest Territories) which contained previously undisturbed populations of Arctic char (Salvelinus alpinus). Initially, the length–frequency distribution of Arctic char in Little Nauyuk Lake was bell shaped, and in Gavia Lake, it could be described by a negative logarithmic expression. Initial sampling of Gavia Lake removed the largest fish, allowing a well-defined mode to develop (cf. Little Nauyuk Lake). In both lakes the modal value remained constant throughout the exploitation phase. When fishing ceased the populations returned to their original state without evident oscillation. The stable state of the dominant population is considered to be one of "least dissipation". It is hypothesized that ecosystem structure depends on countervailing forces, one tending to decelerate energy flow through the ecosystem and the second tending to accelerate it. For ecosystems to exist, the tendency to decelerate energy flow must dominate system behaviour over ecological time. An ecosystem is regarded as a hemeorhetic system, stability seeking through the stabilization of energy flows. Article in Journal/Newspaper Arctic Northwest Territories Salvelinus alpinus Canadian Science Publishing Arctic Northwest Territories Canadian Journal of Fisheries and Aquatic Sciences 51 1 209 225 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Johnson, Lionel Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Previous research indicated that fish populations in arctic lakes maintain a constant size distribution and abundance in the face of the environmental variability experienced over their recent history. Such stability was tested over 15 seasons in Little Nauyuk and Gavia lakes (Northwest Territories) which contained previously undisturbed populations of Arctic char (Salvelinus alpinus). Initially, the length–frequency distribution of Arctic char in Little Nauyuk Lake was bell shaped, and in Gavia Lake, it could be described by a negative logarithmic expression. Initial sampling of Gavia Lake removed the largest fish, allowing a well-defined mode to develop (cf. Little Nauyuk Lake). In both lakes the modal value remained constant throughout the exploitation phase. When fishing ceased the populations returned to their original state without evident oscillation. The stable state of the dominant population is considered to be one of "least dissipation". It is hypothesized that ecosystem structure depends on countervailing forces, one tending to decelerate energy flow through the ecosystem and the second tending to accelerate it. For ecosystems to exist, the tendency to decelerate energy flow must dominate system behaviour over ecological time. An ecosystem is regarded as a hemeorhetic system, stability seeking through the stabilization of energy flows. |
format |
Article in Journal/Newspaper |
author |
Johnson, Lionel |
author_facet |
Johnson, Lionel |
author_sort |
Johnson, Lionel |
title |
Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes |
title_short |
Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes |
title_full |
Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes |
title_fullStr |
Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes |
title_full_unstemmed |
Long-term Experiments on the Stability of Two Fish Populations in Previously Unexploited Arctic Lakes |
title_sort |
long-term experiments on the stability of two fish populations in previously unexploited arctic lakes |
publisher |
Canadian Science Publishing |
publishDate |
1994 |
url |
http://dx.doi.org/10.1139/f94-023 http://www.nrcresearchpress.com/doi/pdf/10.1139/f94-023 |
geographic |
Arctic Northwest Territories |
geographic_facet |
Arctic Northwest Territories |
genre |
Arctic Northwest Territories Salvelinus alpinus |
genre_facet |
Arctic Northwest Territories Salvelinus alpinus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 51, issue 1, page 209-225 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f94-023 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
51 |
container_issue |
1 |
container_start_page |
209 |
op_container_end_page |
225 |
_version_ |
1795664019617480704 |