J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan
ABSTRACT. Two hypotheses have been proposed to explain the dynamics of sympatric populations of deepwater sculpin (Myoxocephalus thompsonii) and slimy sculpin (Cottus cognatus). The first hypothesis is that slimy sculpins negatively affect survival of deepwater sculpins, and therefore deepwater scul...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.518.3254 2023-05-15T15:47:16+02:00 J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan Charles P. Madenjian Darryl W. Hondorp Timothy J. Desorcie Jeffrey D. Holuszko The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.3254 http://www.glerl.noaa.gov/pubs/fulltext/2005/20050030.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.3254 http://www.glerl.noaa.gov/pubs/fulltext/2005/20050030.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.glerl.noaa.gov/pubs/fulltext/2005/20050030.pdf text ftciteseerx 2016-01-08T09:58:19Z ABSTRACT. Two hypotheses have been proposed to explain the dynamics of sympatric populations of deepwater sculpin (Myoxocephalus thompsonii) and slimy sculpin (Cottus cognatus). The first hypothesis is that slimy sculpins negatively affect survival of deepwater sculpins, and therefore deepwater sculpins coexist with slimy sculpins only when a keystone predator, lake trout (Salvelinus namaycush), is abun-dant. According to the second hypothesis, changes in the abundances of the sculpins are driven by inter-actions with fishes other than sculpins. To evaluate both hypotheses, we applied regression analyses to long-term observations on abundances of both sculpin populations in Lake Michigan during 1973–2002. For slimy sculpin abundance, we considered the predation effect by lake trout and the effect of deepwater sculpins on slimy sculpins. For deepwater sculpin abundance, we considered the effect of alewife (Alosa pseudoharengus) on deepwater sculpins, the predation effect by burbot (Lota lota), and the effect of slimy sculpins on deepwater sculpins. An information criterion was used to select the best regression model explaining the temporal trends. The best model to explain trends in slimy sculpin abundance was the model that included the lake trout predation term only. The best model to explain trends in deepwater sculpin abundance was a model including the alewife and burbot predation terms. Thus, a negative effect of slimy sculpins on deepwater sculpins was not essential in capturing the sculpin community dynamics. Therefore, our results supported the second hypothesis. Further, our results supported the contention that control of the alewife population was a prerequisite for restoration of deepwater sculpin populations. INDEX WORDS: Deepwater sculpin, food web, predation, restoration, slimy sculpin, species inva-sions. Text Burbot Cottus cognatus Lota lota lota Slimy sculpin Unknown |
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Open Polar |
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ftciteseerx |
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English |
description |
ABSTRACT. Two hypotheses have been proposed to explain the dynamics of sympatric populations of deepwater sculpin (Myoxocephalus thompsonii) and slimy sculpin (Cottus cognatus). The first hypothesis is that slimy sculpins negatively affect survival of deepwater sculpins, and therefore deepwater sculpins coexist with slimy sculpins only when a keystone predator, lake trout (Salvelinus namaycush), is abun-dant. According to the second hypothesis, changes in the abundances of the sculpins are driven by inter-actions with fishes other than sculpins. To evaluate both hypotheses, we applied regression analyses to long-term observations on abundances of both sculpin populations in Lake Michigan during 1973–2002. For slimy sculpin abundance, we considered the predation effect by lake trout and the effect of deepwater sculpins on slimy sculpins. For deepwater sculpin abundance, we considered the effect of alewife (Alosa pseudoharengus) on deepwater sculpins, the predation effect by burbot (Lota lota), and the effect of slimy sculpins on deepwater sculpins. An information criterion was used to select the best regression model explaining the temporal trends. The best model to explain trends in slimy sculpin abundance was the model that included the lake trout predation term only. The best model to explain trends in deepwater sculpin abundance was a model including the alewife and burbot predation terms. Thus, a negative effect of slimy sculpins on deepwater sculpins was not essential in capturing the sculpin community dynamics. Therefore, our results supported the second hypothesis. Further, our results supported the contention that control of the alewife population was a prerequisite for restoration of deepwater sculpin populations. INDEX WORDS: Deepwater sculpin, food web, predation, restoration, slimy sculpin, species inva-sions. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Charles P. Madenjian Darryl W. Hondorp Timothy J. Desorcie Jeffrey D. Holuszko |
spellingShingle |
Charles P. Madenjian Darryl W. Hondorp Timothy J. Desorcie Jeffrey D. Holuszko J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan |
author_facet |
Charles P. Madenjian Darryl W. Hondorp Timothy J. Desorcie Jeffrey D. Holuszko |
author_sort |
Charles P. Madenjian |
title |
J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan |
title_short |
J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan |
title_full |
J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan |
title_fullStr |
J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan |
title_full_unstemmed |
J. Great Lakes Res. 31:267–276 Internat. Assoc. Great Lakes Res., 2005 Sculpin Community Dynamics in Lake Michigan |
title_sort |
j. great lakes res. 31:267–276 internat. assoc. great lakes res., 2005 sculpin community dynamics in lake michigan |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.3254 http://www.glerl.noaa.gov/pubs/fulltext/2005/20050030.pdf |
genre |
Burbot Cottus cognatus Lota lota lota Slimy sculpin |
genre_facet |
Burbot Cottus cognatus Lota lota lota Slimy sculpin |
op_source |
http://www.glerl.noaa.gov/pubs/fulltext/2005/20050030.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.518.3254 http://www.glerl.noaa.gov/pubs/fulltext/2005/20050030.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766382054236225536 |