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Space-time distribution of the ichthyofauna from Saco da Fazenda estuary, ItajaĆ, Santa Catarina, Brazil
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Advisor(s)
Abstract(s)
A Ictiofauna do estuĆ”rio Saco da Fazenda foi estudada mensalmente entre julho de 2003 e junho de 2004 em quatro Ć”reas definidas em funĆ§Ć£o das caracterĆsticas fisiogrĆ”ficas e da representatividade do estuĆ”rio nesta regiĆ£o. Foram capturados 4502 exemplares, distribuĆdos em 42 espĆ©cies, 35 gĆŖneros e 21 famĆlias. Engraulidae foram os peixes mais abundantes, onde Cetengraulis edentulus dominou nas capturas. As espĆ©cies de ocorrĆŖncia ocasional, representadas, principalmente por indivĆduos juvenis, predominaram nas amostragens. As maiores abundĆ¢ncias ocorreram durante os meses de verĆ£o e outono, em contraste com as elevadas biomassas na primavera-outono; sendo que a Ć”rea IV diferenciou-se das demais, por contribuir com as maiores capturas. Os Ćndices de riqueza, diversidade e equitabilidade, apresentaram padrƵes semelhantes de flutuaĆ§Ć£o, com valores elevados nos meses de primavera e verĆ£o. O Ćndice de Jaccard revelou uma maior similaridade na composiĆ§Ć£o da ictiofauna entre as Ć”reas II e IV, enquanto a menor ocorreu entre I e IV, provavelmente devido Ć s diferentes Ć”reas destes locais.
ABSTRACT: From July 2003 to June 2004, the physiographic characteristics of the ichthyofauna of the estuary of Saco da Fazenda were studied in four defined areas representative of the estuary. A total of 4502 individuals were captured, with 42 species, 35 genera, and 21 families. Engraulidae were the most abundant fish, and Cetengraulis edentulus dominated the captures. The species of occasional occurrence prevailed in the samplings and were represented mainly by juvenile individuals. The highest abundances occurred during the months of summer and autumn, in contrast with high biomasses in the spring and autumn; area IV contributed the largest captures. The richness indexes, diversity, and equitability presented similar flotation patterns, with high values in spring and summer. The Jaccard index revealed a greater similarity in the composition of the ichthyofauna in areas II and IV, while the lowest happened between I and IV, which is probably due to the different sizes of these areas. This paper clearly shows the relevance of this estuary, albeit strongly impacted, for recruitment of small fish mainly during summer and autumn months.
ABSTRACT: From July 2003 to June 2004, the physiographic characteristics of the ichthyofauna of the estuary of Saco da Fazenda were studied in four defined areas representative of the estuary. A total of 4502 individuals were captured, with 42 species, 35 genera, and 21 families. Engraulidae were the most abundant fish, and Cetengraulis edentulus dominated the captures. The species of occasional occurrence prevailed in the samplings and were represented mainly by juvenile individuals. The highest abundances occurred during the months of summer and autumn, in contrast with high biomasses in the spring and autumn; area IV contributed the largest captures. The richness indexes, diversity, and equitability presented similar flotation patterns, with high values in spring and summer. The Jaccard index revealed a greater similarity in the composition of the ichthyofauna in areas II and IV, while the lowest happened between I and IV, which is probably due to the different sizes of these areas. This paper clearly shows the relevance of this estuary, albeit strongly impacted, for recruitment of small fish mainly during summer and autumn months.
Description
Copyright Ā© 2009 Coastal Education and Research Foundation (CERF).
Keywords
Abundance Diversity Richness Seasonal Fluctuations
Citation
Barreiros, J.P.; Branco, J.O.; Freitas, F., JR.; Machado, L.; Hostim Silva, M., and Verani, J.R. (2009). "Space-time distribution of the ichthyofauna from Saco da Fazenda Estuary, ItajaĆ, Santa Catarina, Brazil". Ā«Journal of Coastal ResearchĀ», 25(5), 1114ā1121. West Palm Beach (Florida). ISSN 0749-0208.
Publisher
Coastal Education and Research Foundation