THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERY
The aim of this scientific note was to evaluate the influence of the coastal current on the estimation of relative abundance indices for small-scale marine shrimp trawling to indicate the best relative abundance index to be used for stock assessment and conservation. Georeferenced experimental traw...
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| Format: | Article |
| Language: | English |
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Instituto de Pesca
2021-12-01
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| Series: | Boletim do Instituto de Pesca |
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| Online Access: | https://institutodepesca.org/index.php/bip/article/view/1657 |
| _version_ | 1797214624720879616 |
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| author | Paulo Victor do Nascimento ARAÚJO Alex Barbosa de MORAES Flávia LUCENA FRÉDOU Fúlvio Aurélio de Morais FREIRE |
| author_facet | Paulo Victor do Nascimento ARAÚJO Alex Barbosa de MORAES Flávia LUCENA FRÉDOU Fúlvio Aurélio de Morais FREIRE |
| author_sort | Paulo Victor do Nascimento ARAÚJO |
| collection | DOAJ |
| description |
The aim of this scientific note was to evaluate the influence of the coastal current on the estimation of relative abundance indices for small-scale marine shrimp trawling to indicate the best relative abundance index to be used for stock assessment and conservation. Georeferenced experimental trawls were carried out with standardized equipment and capture time on the coast of Rio Grande do Norte, northeastern Brazil. Drags followed convergent and divergent orientations in relation to the flow of the local coastal current. The results showed that the direction of the coastal current flow directly influences the distances and drag shifts, generating variations in the sampling effort and, consequently, bias when using Catch per Unit Effort (CPUE) as a relative abundance index. Conversely, the adoption of Catch per Unit of Swept Area (CPUA) as an index of relative abundance for shrimp trawling becomes more suitable since the variations in the distances of trawl shifts are perceptible through this index.
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| first_indexed | 2024-04-24T11:17:08Z |
| format | Article |
| id | doaj.art-716ae83b86ba41e7b128ca2808bcd497 |
| institution | Directory Open Access Journal |
| issn | 1678-2305 |
| language | English |
| last_indexed | 2024-04-24T11:17:08Z |
| publishDate | 2021-12-01 |
| publisher | Instituto de Pesca |
| record_format | Article |
| series | Boletim do Instituto de Pesca |
| spelling | doaj.art-716ae83b86ba41e7b128ca2808bcd4972024-04-11T05:52:23ZengInstituto de PescaBoletim do Instituto de Pesca1678-23052021-12-0147THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERYPaulo Victor do Nascimento ARAÚJO0Alex Barbosa de MORAES1Flávia LUCENA FRÉDOU2Fúlvio Aurélio de Morais FREIRE3Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Norte - IFRN, Campus Macau, Grupo de Pesquisa em Análise Ambiental, Modelagem e Geoinformação - PAMGEIA.Universidade Federal do Rio Grande do Norte - UFRN, Campus Universitário Lagoa Nova, Centro de Biociências - CB, Departamento de Botí¢nica e Zoologia - BEZ, LaboratoÌÂrio de Ecologia e EvoluçaÌÆ’o de CrustaÌÂceos - LABEEC.Universidade Federal Rural de Pernambuco - UFRPE, Campus Dois Irmãos, Departamento de Pesca e Aquicultura - DEPAqUniversidade Federal do Rio Grande do Norte - UFRN, Campus Universitário Lagoa Nova, Centro de Biociências - CB, Departamento de Botí¢nica e Zoologia - BEZ, LaboratoÌÂrio de Ecologia e EvoluçaÌÆ’o de CrustaÌÂceos - LABEEC. The aim of this scientific note was to evaluate the influence of the coastal current on the estimation of relative abundance indices for small-scale marine shrimp trawling to indicate the best relative abundance index to be used for stock assessment and conservation. Georeferenced experimental trawls were carried out with standardized equipment and capture time on the coast of Rio Grande do Norte, northeastern Brazil. Drags followed convergent and divergent orientations in relation to the flow of the local coastal current. The results showed that the direction of the coastal current flow directly influences the distances and drag shifts, generating variations in the sampling effort and, consequently, bias when using Catch per Unit Effort (CPUE) as a relative abundance index. Conversely, the adoption of Catch per Unit of Swept Area (CPUA) as an index of relative abundance for shrimp trawling becomes more suitable since the variations in the distances of trawl shifts are perceptible through this index. https://institutodepesca.org/index.php/bip/article/view/1657fishing effort;Catch per Unit Effort;Catch per Unit Swept Area;fisheries research;trawl fishing;artisanal fishing. |
| spellingShingle | Paulo Victor do Nascimento ARAÚJO Alex Barbosa de MORAES Flávia LUCENA FRÉDOU Fúlvio Aurélio de Morais FREIRE THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERY Boletim do Instituto de Pesca fishing effort; Catch per Unit Effort; Catch per Unit Swept Area; fisheries research; trawl fishing; artisanal fishing. |
| title | THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERY |
| title_full | THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERY |
| title_fullStr | THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERY |
| title_full_unstemmed | THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERY |
| title_short | THE INFLUENCE OF THE COASTAL CURRENT ON THE ESTIMATION OF RELATIVE ABUNDANCE INDICES IN SMALL-SCALE SHRIMP FISHERY |
| title_sort | influence of the coastal current on the estimation of relative abundance indices in small scale shrimp fishery |
| topic | fishing effort; Catch per Unit Effort; Catch per Unit Swept Area; fisheries research; trawl fishing; artisanal fishing. |
| url | https://institutodepesca.org/index.php/bip/article/view/1657 |
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