Seasonal recruitment of the hydroid Podocoryna loyola (Hydractiniidae) in the Paranaguá Bay, South of Brazil
| Autor: | Ariane Lima Bettim, Maria Angélica Haddad |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Cnidaria geography geography.geographical_feature_category biology Ecology 010604 marine biology & hydrobiology Estuary Introduced species Aquatic Science Seasonality Oceanography biology.organism_classification medicine.disease 010603 evolutionary biology 01 natural sciences Salinity Abundance (ecology) Hydroid (zoology) medicine Bay Ecology Evolution Behavior and Systematics |
| Zdroj: | Marine Biology Research. 13:560-572 |
| ISSN: | 1745-1019 1745-1000 |
| Popis: | Knowledge about the seasonal patterns of recruitment and growth of a non-native species is a precondition to forecast its effect on the native community. The aim of this study was to analyse the seasonality of the hydrozoan Podocoryna loyola, a possible non-native hydroid species in southern Brazilian estuaries, on sets of polyethylene plates, submerged every three months over four years (April 2009 to April 2013), in the Paranagua Bay. The species’ abundance was measured as cover, area and number of colonies. These measures showed the same pattern of variation over the seasonal cycles, with higher values occurring in the warmer seasons. A high percentage of colonies with gonozooids also occurred in the warmer seasons, except in the first year, explaining the reduction in the number and cover of colonies at the beginning of the second year. Atypical salinity conditions in the summer/autumn of the second year may have caused the absence of P. loyola until the spring of the next year. Beyond the inf... |
| Databáze: | OpenAIRE |
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