An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research
Recently in Atlantic Canada, there has been increased concern associated with potato farming due to an increase in the fre-quency and magnitude of fish kills downstream of agricultural cultivation activities following major storm events. Over a period of three years (1999–2001), we monitored the pop...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.551.501 2023-05-15T15:56:51+02:00 An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research Michelle A. Gray Kelly R. Munkittrick The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.501 http://www.cawq.ca/journal/temp/article/176.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.501 http://www.cawq.ca/journal/temp/article/176.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cawq.ca/journal/temp/article/176.pdf text 2005 ftciteseerx 2016-01-08T11:34:49Z Recently in Atlantic Canada, there has been increased concern associated with potato farming due to an increase in the fre-quency and magnitude of fish kills downstream of agricultural cultivation activities following major storm events. Over a period of three years (1999–2001), we monitored the population structure and physiological performance of slimy sculpin (Cottus cognatus) within the Little River, located in an intensive potato cultivation region of northwestern New Brunswick. The slimy sculpin, a small-bodied benthic fish, was considered suitable for monitoring due to its natural abundance through-out the system, limited mobility, lack of commercial fishing pressures, and easily measured life history characteristics. Rather than focus on particular agricultural stressors, an effects-based assessment of the fish in the system was conducted to deter-mine whether there were observable and persistent responses of sculpin in the agricultural region. We found that the local population structure at agricultural sites consisted of fewer young-of-the-year sculpin in 2 of 3 fall collections. In comparison with forested reaches, adult sculpin were larger but with smaller gonads, and females had smaller livers, gonads, and fewer and smaller eggs. These biological responses were reduced in the fall of the third year following drier conditions than the previous two years. The effects-based approach successfully demonstrated biological impacts on sculpin both temporally and spatially and therefore the species ’ potential for studying non-point source impacts in environmental monitoring. Key words: effects-based assessment, agriculture, non-point source pollution, slimy sculpin Text Cottus cognatus Slimy sculpin Unknown Canada Little River ENVELOPE(-135.687,-135.687,60.894,60.894) |
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ftciteseerx |
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English |
description |
Recently in Atlantic Canada, there has been increased concern associated with potato farming due to an increase in the fre-quency and magnitude of fish kills downstream of agricultural cultivation activities following major storm events. Over a period of three years (1999–2001), we monitored the population structure and physiological performance of slimy sculpin (Cottus cognatus) within the Little River, located in an intensive potato cultivation region of northwestern New Brunswick. The slimy sculpin, a small-bodied benthic fish, was considered suitable for monitoring due to its natural abundance through-out the system, limited mobility, lack of commercial fishing pressures, and easily measured life history characteristics. Rather than focus on particular agricultural stressors, an effects-based assessment of the fish in the system was conducted to deter-mine whether there were observable and persistent responses of sculpin in the agricultural region. We found that the local population structure at agricultural sites consisted of fewer young-of-the-year sculpin in 2 of 3 fall collections. In comparison with forested reaches, adult sculpin were larger but with smaller gonads, and females had smaller livers, gonads, and fewer and smaller eggs. These biological responses were reduced in the fall of the third year following drier conditions than the previous two years. The effects-based approach successfully demonstrated biological impacts on sculpin both temporally and spatially and therefore the species ’ potential for studying non-point source impacts in environmental monitoring. Key words: effects-based assessment, agriculture, non-point source pollution, slimy sculpin |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Michelle A. Gray Kelly R. Munkittrick |
spellingShingle |
Michelle A. Gray Kelly R. Munkittrick An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research |
author_facet |
Michelle A. Gray Kelly R. Munkittrick |
author_sort |
Michelle A. Gray |
title |
An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research |
title_short |
An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research |
title_full |
An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research |
title_fullStr |
An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research |
title_full_unstemmed |
An effects-based assessment of slimy sculpin (Cottus cognatus) populations in agricultural regions of northwestern New Brunswick. Water Quality Research |
title_sort |
effects-based assessment of slimy sculpin (cottus cognatus) populations in agricultural regions of northwestern new brunswick. water quality research |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.501 http://www.cawq.ca/journal/temp/article/176.pdf |
long_lat |
ENVELOPE(-135.687,-135.687,60.894,60.894) |
geographic |
Canada Little River |
geographic_facet |
Canada Little River |
genre |
Cottus cognatus Slimy sculpin |
genre_facet |
Cottus cognatus Slimy sculpin |
op_source |
http://www.cawq.ca/journal/temp/article/176.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.551.501 http://www.cawq.ca/journal/temp/article/176.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766392494702985216 |