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...

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Autores principales:	Giordano,Rodolfo Gutterres, Santos,Luciano Neves dos
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar 2014
Materias:	reef fish visual census free diving scuba diving Brazil
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200003
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spelling	oai:scielo:S0718-560X20140002000032014-05-30Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefsGiordano,Rodolfo GutterresSantos,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.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del MarLatin american journal of aquatic research v.42 n.2 20142014-05-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200003en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	reef fish visual census free diving scuba diving Brazil
spellingShingle	reef fish visual census free diving scuba diving Brazil Giordano,Rodolfo Gutterres Santos,Luciano Neves dos Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs
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.
author	Giordano,Rodolfo Gutterres Santos,Luciano Neves dos
author_facet	Giordano,Rodolfo Gutterres Santos,Luciano Neves dos
author_sort	Giordano,Rodolfo Gutterres
title	Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs
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
publisher	Pontificia Universidad Católica de Valparaíso. Facultad de Recursos Naturales. Escuela de Ciencias del Mar
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2014000200003
work_keys_str_mv	AT giordanorodolfogutterres comparativeanalysisoffreeandscubadivingforbenthopelagicandcrypticfishspeciesassociatedwithrockyreefs AT santoslucianonevesdos comparativeanalysisoffreeandscubadivingforbenthopelagicandcrypticfishspeciesassociatedwithrockyreefs
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Comparative analysis of free and scuba diving for benthopelagic and cryptic fish species associated with rocky reefs

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