Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland
A 3-year otter trawling experiment was conducted on a deepwater (120146 m) sandy bottom ecosystem on the Grand Banks of Newfoundland that had not experienced trawling for at least 12 years. The benthic macrofauna were sampled before and after trawling and in reference areas. The 200 grab samples co...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2001
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f01-053 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-053 |
id |
crcansciencepubl:10.1139/f01-053 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f01-053 2024-04-28T08:28:47+00:00 Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland Kenchington, E LR Prena, J Gilkinson, K D Gordon Jr., D C MacIsaac, K Bourbonnais, C Schwinghamer, P J Rowell, T W McKeown, D L Vass, W P 2001 http://dx.doi.org/10.1139/f01-053 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-053 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 58, issue 6, page 1043-1057 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2001 crcansciencepubl https://doi.org/10.1139/f01-053 2024-04-09T06:56:28Z A 3-year otter trawling experiment was conducted on a deepwater (120146 m) sandy bottom ecosystem on the Grand Banks of Newfoundland that had not experienced trawling for at least 12 years. The benthic macrofauna were sampled before and after trawling and in reference areas. The 200 grab samples collected contained 246 taxa, primarily polychaetes, crustaceans, echinoderms, and molluscs. Biomass was dominated by propeller clams (Cyrtodaria siliqua) and sand dollars (Echinarachnius parma), while abundance was dominated by the polychaete Prionospio steenstrupi and the mollusc Macoma calcarea. The most prominent feature of the data was a natural decline in the total number of species, the total abundance, and the abundance and biomass of selected species between 1993 and 1995. The only immediate effect of trawling was seen in 1994 when the abundance of 13 species, the biomass of 11 species (mostly polychaetes), and the total abundance per grab were significantly lower. There was little evidence of long-term trawling effects. When trawling disturbance was indicated, it appeared to mimic natural disturbance, shifting the community in the same direction in multidimensional scaling ordination; no distinctive trawling signature was observed. However, the results of this experiment should not be uncritically extrapolated to the impacts of commercial trawling. Article in Journal/Newspaper Newfoundland Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 58 6 1043 1057 |
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 Kenchington, E LR Prena, J Gilkinson, K D Gordon Jr., D C MacIsaac, K Bourbonnais, C Schwinghamer, P J Rowell, T W McKeown, D L Vass, W P Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
A 3-year otter trawling experiment was conducted on a deepwater (120146 m) sandy bottom ecosystem on the Grand Banks of Newfoundland that had not experienced trawling for at least 12 years. The benthic macrofauna were sampled before and after trawling and in reference areas. The 200 grab samples collected contained 246 taxa, primarily polychaetes, crustaceans, echinoderms, and molluscs. Biomass was dominated by propeller clams (Cyrtodaria siliqua) and sand dollars (Echinarachnius parma), while abundance was dominated by the polychaete Prionospio steenstrupi and the mollusc Macoma calcarea. The most prominent feature of the data was a natural decline in the total number of species, the total abundance, and the abundance and biomass of selected species between 1993 and 1995. The only immediate effect of trawling was seen in 1994 when the abundance of 13 species, the biomass of 11 species (mostly polychaetes), and the total abundance per grab were significantly lower. There was little evidence of long-term trawling effects. When trawling disturbance was indicated, it appeared to mimic natural disturbance, shifting the community in the same direction in multidimensional scaling ordination; no distinctive trawling signature was observed. However, the results of this experiment should not be uncritically extrapolated to the impacts of commercial trawling. |
format |
Article in Journal/Newspaper |
author |
Kenchington, E LR Prena, J Gilkinson, K D Gordon Jr., D C MacIsaac, K Bourbonnais, C Schwinghamer, P J Rowell, T W McKeown, D L Vass, W P |
author_facet |
Kenchington, E LR Prena, J Gilkinson, K D Gordon Jr., D C MacIsaac, K Bourbonnais, C Schwinghamer, P J Rowell, T W McKeown, D L Vass, W P |
author_sort |
Kenchington, E LR |
title |
Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland |
title_short |
Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland |
title_full |
Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland |
title_fullStr |
Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland |
title_full_unstemmed |
Effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the Grand Banks of Newfoundland |
title_sort |
effects of experimental otter trawling on the macrofauna of a sandy bottom ecosystem on the grand banks of newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
2001 |
url |
http://dx.doi.org/10.1139/f01-053 http://www.nrcresearchpress.com/doi/pdf/10.1139/f01-053 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 58, issue 6, page 1043-1057 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f01-053 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
58 |
container_issue |
6 |
container_start_page |
1043 |
op_container_end_page |
1057 |
_version_ |
1797587208638562304 |