Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon
The recovery of giant otter populations after the hunting prohibition and restriction of the pelt trade resulted in more frequent conflicts with fishermen. In this study, fisherman-giant otter conflicts were analyzed in the Uacari Sustainable Development Reserve, where giant otters are accused of in...
| Autor principal: | Rosas-Ribeiro, Patrícia F. |
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| Outros Autores: | Weber Rosas, Fernando Cesar, Zuanon, Jansen |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Biotropica
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18043 |
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oai:repositorio:1-18043 |
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oai:repositorio:1-18043 Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon Rosas-Ribeiro, Patrícia F. Weber Rosas, Fernando Cesar Zuanon, Jansen Conservation Management Diet Ecological Impact Fishing Community Food Consumption Generalist Gillnet Mustelid Nature-society Relations Predation Questionnaire Survey Recovery Plan Seasonality Stock Assessment Amazonas Brasil Carnivora Lutrinae Mammalia Pteronura Brasiliensis The recovery of giant otter populations after the hunting prohibition and restriction of the pelt trade resulted in more frequent conflicts with fishermen. In this study, fisherman-giant otter conflicts were analyzed in the Uacari Sustainable Development Reserve, where giant otters are accused of interfering with fisheries by eating the fish (predation), frightening the fish away (local interference), and damaging fishing equipment (direct interference). Interference by predation was analyzed by evaluating overlap in fish species consumption between humans (measured by subsistence and commercial catches) and giant otters. The giant otter diet was assessed from fecal samples, and the human diet through questionnaires. Local and direct interferences were analyzed through fish samples using gillnets and comparing capture efficiency with and without giant otters' presence. The overlap between human and giant otter diets was low (0.37), varied seasonally, and was smaller in the low water (0.24) than in the high water period (0.60), when both species tend to be more generalists. Overlap between fish species consumed by giant otters and those exploited by commercial fisheries was small (0.34). Giant otter presence during the experimental fishing was low (9.5%), restricted to the high water period, and did not significantly reduce the captures (U = 13, P = 0.61). The low overlap in diet may be a result of differences in preferences and fishing strategies. The conflict between giant otters and fishermen is greater in the high water period, when the income of the fisheries decreases; however, the conflict seems to be mainly motivated by the resident's prejudice against giant otters. © 2011 by The Association for Tropical Biology and Conservation. 2020-06-15T21:51:11Z 2020-06-15T21:51:11Z 2012 Artigo https://repositorio.inpa.gov.br/handle/1/18043 10.1111/j.1744-7429.2011.00828.x en Volume 44, Número 3, Pags. 437-444 Restrito Biotropica |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Conservation Management Diet Ecological Impact Fishing Community Food Consumption Generalist Gillnet Mustelid Nature-society Relations Predation Questionnaire Survey Recovery Plan Seasonality Stock Assessment Amazonas Brasil Carnivora Lutrinae Mammalia Pteronura Brasiliensis |
| spellingShingle |
Conservation Management Diet Ecological Impact Fishing Community Food Consumption Generalist Gillnet Mustelid Nature-society Relations Predation Questionnaire Survey Recovery Plan Seasonality Stock Assessment Amazonas Brasil Carnivora Lutrinae Mammalia Pteronura Brasiliensis Rosas-Ribeiro, Patrícia F. Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon |
| topic_facet |
Conservation Management Diet Ecological Impact Fishing Community Food Consumption Generalist Gillnet Mustelid Nature-society Relations Predation Questionnaire Survey Recovery Plan Seasonality Stock Assessment Amazonas Brasil Carnivora Lutrinae Mammalia Pteronura Brasiliensis |
| description |
The recovery of giant otter populations after the hunting prohibition and restriction of the pelt trade resulted in more frequent conflicts with fishermen. In this study, fisherman-giant otter conflicts were analyzed in the Uacari Sustainable Development Reserve, where giant otters are accused of interfering with fisheries by eating the fish (predation), frightening the fish away (local interference), and damaging fishing equipment (direct interference). Interference by predation was analyzed by evaluating overlap in fish species consumption between humans (measured by subsistence and commercial catches) and giant otters. The giant otter diet was assessed from fecal samples, and the human diet through questionnaires. Local and direct interferences were analyzed through fish samples using gillnets and comparing capture efficiency with and without giant otters' presence. The overlap between human and giant otter diets was low (0.37), varied seasonally, and was smaller in the low water (0.24) than in the high water period (0.60), when both species tend to be more generalists. Overlap between fish species consumed by giant otters and those exploited by commercial fisheries was small (0.34). Giant otter presence during the experimental fishing was low (9.5%), restricted to the high water period, and did not significantly reduce the captures (U = 13, P = 0.61). The low overlap in diet may be a result of differences in preferences and fishing strategies. The conflict between giant otters and fishermen is greater in the high water period, when the income of the fisheries decreases; however, the conflict seems to be mainly motivated by the resident's prejudice against giant otters. © 2011 by The Association for Tropical Biology and Conservation. |
| format |
Artigo |
| author |
Rosas-Ribeiro, Patrícia F. |
| author2 |
Weber Rosas, Fernando Cesar Zuanon, Jansen |
| author2Str |
Weber Rosas, Fernando Cesar Zuanon, Jansen |
| title |
Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon |
| title_short |
Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon |
| title_full |
Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon |
| title_fullStr |
Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon |
| title_full_unstemmed |
Conflict between Fishermen and Giant Otters Pteronura brasiliensis in Western Brazilian Amazon |
| title_sort |
conflict between fishermen and giant otters pteronura brasiliensis in western brazilian amazon |
| publisher |
Biotropica |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18043 |
| _version_ |
1787141934079279104 |
| score |
11.755432 |