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19. Population biology of the crab Armases angustipes (Crustacea, Decapoda, Sesarmidae) at Brazilian tropical coast

Author

Marina de Sá Leitão C. de Araújo, Deusinete de O. Tenório, and Daniela da S. Castiglioni

Subjects
Dinâmica populacional, período reprodutivo, sesarmídeo, Zoology, QL1-991
Abstract

The semi terrestrial crabs are important elements of the fauna of coastal regions. The aim of this study was to analyze the population structure of Armases angustipes (Dana, 1852) at estuaries of the Ariquindá River, considered a non impacted area, and Mamucabas River, considered a few impacted area, on the south coast of state of Pernambuco, Brazil. The species occurred in all months of the year. The number of individuals per month varied, being higher in the months of transition between the seasons. This is probably due to significant seasonal variations of air and burrow temperature and burrow salinity. There was no sexual dimorphism in size of A. angustipes in the mangrove of Ariquindá River, but males were larger than females in the mangrove of Mamucabas River. In both estuaries, the sex ratio did not differ from Mendelian proportion, but showed a deviation for females. The analysis of temporal variation in sex ratio showed significant differences in some months of the year. These variations are due to cyclical events that act distinctly on each sex. In both estuaries, size classes of carapace width were equally represented by both sexes. The ovigerous females of A. angustipes occurred only in some months of the year, especially in summer, in both estuaries. Probably the high phytoplankton productivity observed in summer favors the reproductive activity, since these algae serve as food for the larvae. Specimens of the population of Rio Ariquindá are largest and wider than those of Mamucabas River. This fact, associated with the low abundance of crabs and the lower frequency of ovigerous females observed in Mamucabas River, is an indication that this population may be influenced by the environmental impacts that this estuary has received.

Published
2014
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21. Mordeduras humanas ocupacionais: meras agressões ou acidentes de trabalho com risco biológico?

Author

Botelho Rodrigues, G., Pacheco, V., Beleza, M., Silva, L., Leitão, C., Rodrigues, T. J., Baptista-Silva, R., Afonso, A., and Antunes, I.

Abstract

Copyright of RPDI - Revista Portuguesa de Doenças Infecciosas is the property of Sociedade Portuguesa de Doencas Infecciosas e Microbiologia Clinica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023

36. On the Merge of Fungal Activity with Ionic Liquids towards the Development of New Biotechnological Processes

Author

Petkovic, M., primary, Ferguson, J., additional, Bohn, A., additional, Trindade, J. R., additional, Martins, I., additional, Leitão, C., additional, Carvalho, M. B., additional, Rodrigues, C., additional, Garcia, H., additional, Ferreira, R., additional, Seddon, K. R., additional, Rebelo, L. P. N., additional, and Silva Pereira, C., additional

Published
2010
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