Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs
This work aimed to assess, through experimental comparisons between free and scuba diving performed in Arraial do Cabo city, RJ, Brazil, the abundances of Scartella cristata e Chaetodon striatus -two reef fish species of contrasting behaviors- in different depth layers of sheltered and exposed rocky...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2014 |
| País: | Chile |
| Institución: | CONICYT Chile |
| Repositorio: | SciELO Chile |
| OAI Identifier: | oai:scielo:S0718-560X2014000200003 |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200003 |
| Access Level: | acceso abierto |
| Palabra clave: | reef fish visual census free diving scuba diving Brazil |
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CL_20bb4e092ed22eb4e46e27eeb12ccc4c |
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oai:scielo:S0718-560X2014000200003 |
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Chile |
| spelling |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs Giordano,Rodolfo Gutterres Santos,Luciano Neves dos reef fish visual census free diving scuba diving Brazil This work aimed to assess, through experimental comparisons between free and scuba diving performed in Arraial do Cabo city, RJ, Brazil, the abundances of Scartella cristata e Chaetodon striatus -two reef fish species of contrasting behaviors- in different depth layers of sheltered and exposed rocky reefs. C. striatus was homogeneously distributed through all the depth strata (0-10 m) and scuba diving should be preferred over free diving to assess the abundance of this species at exposed rocky shores, undergoing continuous effects of waves and winds. Both free and scuba diving can be used indistinctly and with no data biases to appraise the abundances of C. striatus in non-turbulent reefs or in shallow zones (i.e., ≤ 5 m) of exposed reefs, and, for S. cristata, in all depth layers (i.e., up to 10 m) of both sheltered and exposed reefs. Although the abundances of S. cristata did not significantly differ between free and scuba diving, contrasting with most previous studies that stressed the risk of the first method to underestimate the abundance of small and cryptic species, it should be considered that the previous experience of the diver and the nature of our study (i.e., focused specifically on a cryptic species) may have contributed to our findings. Further studies are, however, necessary to test our findings in different conditions (i.e., depths, hydrodynamic characteristics, and habitat complexity) and for other tropical reef fish species, in order to increase the truthfulness of underwater visual census and reduce the risk of failure of fish conservation and management programs potentially based on biased data. Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200003 |
| title |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs |
| spellingShingle |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs Giordano,Rodolfo Gutterres reef fish visual census free diving scuba diving Brazil |
| title_short |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs |
| title_full |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs |
| title_fullStr |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs |
| title_full_unstemmed |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs |
| title_sort |
Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs |
| author |
Giordano,Rodolfo Gutterres |
| author_facet |
Giordano,Rodolfo Gutterres Santos,Luciano Neves dos |
| author_role |
author |
| author2 |
Santos,Luciano Neves dos |
| author2_role |
author |
| topic |
reef fish visual census free diving scuba diving Brazil |
| topic_facet |
reef fish visual census free diving scuba diving Brazil |
| description |
This work aimed to assess, through experimental comparisons between free and scuba diving performed in Arraial do Cabo city, RJ, Brazil, the abundances of Scartella cristata e Chaetodon striatus -two reef fish species of contrasting behaviors- in different depth layers of sheltered and exposed rocky reefs. C. striatus was homogeneously distributed through all the depth strata (0-10 m) and scuba diving should be preferred over free diving to assess the abundance of this species at exposed rocky shores, undergoing continuous effects of waves and winds. Both free and scuba diving can be used indistinctly and with no data biases to appraise the abundances of C. striatus in non-turbulent reefs or in shallow zones (i.e., ≤ 5 m) of exposed reefs, and, for S. cristata, in all depth layers (i.e., up to 10 m) of both sheltered and exposed reefs. Although the abundances of S. cristata did not significantly differ between free and scuba diving, contrasting with most previous studies that stressed the risk of the first method to underestimate the abundance of small and cryptic species, it should be considered that the previous experience of the diver and the nature of our study (i.e., focused specifically on a cryptic species) may have contributed to our findings. Further studies are, however, necessary to test our findings in different conditions (i.e., depths, hydrodynamic characteristics, and habitat complexity) and for other tropical reef fish species, in order to increase the truthfulness of underwater visual census and reduce the risk of failure of fish conservation and management programs potentially based on biased data. |
| publishDate |
2014 |
| format |
article |
| status_str |
publishedVersion |
| url |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200003 |
| eu_rights_str_mv |
openAccess |
| publisher |
Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar |
| institution |
CONICYT |
| collection |
SciELO Chile |
| reponame_str |
SciELO Chile |
| instname_str |
CONICYT Chile |
| _version_ |
1878404234083303425 |
| publishDateSort |
2014 |
| author_browse |
Giordano,Rodolfo Gutterres Santos,Luciano Neves dos |
| publisherStr |
Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar |
| score |
6,9460754 |