科研之友
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摘要
The spatio-temporal patterns of three species of Prochilodontidae larvae that are intensely used as fishery resources in Central Amazonia are analysed. Sampling was conducted during 2011 at four stages of the hydrological cycle (flood, high water, falling and low water phases). Sixteen collecting stations were located in different habitats (mouths of lake channels, "barrancos," sandbars and the main river channel) along the Solimoes and Japura rivers. A total of 4,322 Prochilodontidae larvae were collected during this investigation, with most captures occurring in the Japura River (76.3% of larvae), while only 23.7% of the samples were caught in the Solimoes River. Most captures occurred during rising water, indicating a strong reproductive seasonality in these three species. Rainfall and water level, along with dissolved oxygen, water temperature and electric conductivity, determined the larvae's spatio-temporal distribution. These results confirm the importance of varzea areas along white water rivers for the conservation, preservation and maintenance of heavily used fishery resources in the Brazilian Central Amazonia.
- 出版日期2017-8
