The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica
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| Formato: | Online |
| Idioma: | eng |
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Universidad de Costa Rica
2001
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/26295 |
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RBT262952022-05-25T21:44:57Z The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica Rostad, Thomas Hansen, Katherine Loe Grab trawling Gulf of Nicoya benthic disturbance Four van Veen grab replicates where collected to sample macrofauna (organism retained on a 500 μ mesh sieve) at four stations in the Gulf of Nicoya, during October 24, 1997, January 16 and April 30, 1998. This information was used to search for any effects of trawling on the benthic fauna. Two stations where located in a trawled area, and two stations where in a protected area. Diversity (H') varied from 2.01 to 3.52 in the trawled area and from 2.13 to 2.78 in the protected area. Diversity was generally higher in the trawled area, and this was in contradiction to what we would have expected from other studies where the trend has been that trawling reduces diversity. Brittlestars and lancelets seemed to be the groups mostly harmed by the trawling, while amphipods where more abundant in trawled areas. The multivariate analyses did not reveal the patterns of faunal change as well as we hoped. This is surely because of our lack of more replicate samples. The multivariate analyses are easily confounded when few sites are analyzed. We have found differences in the type of fauna found in trawled and protected areas and, considering the differences in environmental variables in our stations and our lack of replication, this indicates that there are differences and a larger investigation is in order to reveal its magnitude. Universidad de Costa Rica 2001-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/26295 Revista de Biología Tropical; Vol. 49 No. S2 (2001): Volume 49 - Supplement 2 - December 2001: Aquatic ecosystems of Costa Rica II; 91–95 Revista de Biología Tropical; Vol. 49 Núm. S2 (2001): Volumen 49 - Suplemento 2 - Diciembre 2001: Ecosistemas acuáticos de Costa Rica II; 91–95 Revista Biología Tropical; Vol. 49 N.º S2 (2001): Volume 49 - Supplement 2 - December 2001: Aquatic ecosystems of Costa Rica II; 91–95 2215-2075 0034-7744 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/26295/26502 Copyright (c) 2001 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
eng |
| format |
Online |
| author |
Rostad, Thomas Hansen, Katherine Loe |
| spellingShingle |
Rostad, Thomas Hansen, Katherine Loe The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica |
| author_facet |
Rostad, Thomas Hansen, Katherine Loe |
| author_sort |
Rostad, Thomas |
| title |
The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica |
| title_short |
The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica |
| title_full |
The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica |
| title_fullStr |
The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica |
| title_full_unstemmed |
The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica |
| title_sort |
effects of trawling on the benthic fauna of the gulf of nicoya, costa rica |
| title_alt |
The effects of trawling on the benthic fauna of the Gulf of Nicoya, Costa Rica |
| publisher |
Universidad de Costa Rica |
| publishDate |
2001 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/26295 |
| work_keys_str_mv |
AT rostadthomas theeffectsoftrawlingonthebenthicfaunaofthegulfofnicoyacostarica AT hansenkatherineloe theeffectsoftrawlingonthebenthicfaunaofthegulfofnicoyacostarica AT rostadthomas effectsoftrawlingonthebenthicfaunaofthegulfofnicoyacostarica AT hansenkatherineloe effectsoftrawlingonthebenthicfaunaofthegulfofnicoyacostarica |
| _version_ |
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