期刊
HYDROBIOLOGIA
卷 771, 期 1, 页码 207-225出版社
SPRINGER
DOI: 10.1007/s10750-015-2631-4
关键词
Xiphopenaeus kroyeri; Small-scale fisheries; Population dynamics; Closed season; Physico-chemical parameters; Population stratification; Life cycle
资金
- National Council of Technological and Scientific Development-CNPq (Edital Universal) [4811222004-4]
- Centro de Estudos do Mar of UFPR (CEM)
The sea-bob shrimp is a shallow-water species whose population dynamics along the southern and southeastern coasts of Brazil is influenced by the upwelling of the South Atlantic Central Water (SACW). Since the SACW does not reach our study area, we hypothesize that life cycle and distribution patterns are dominated by the local regime of estuarine plumes. Also, we would expect higher biomasses and larger individuals in autumn due to the closed fishing season. We conducted a survey for a year, consisting of 20 monthly trawling hauls. Spawning peaks occurred in spring and autumn, related to rainy periods with greater estuarine loads of particulate material and phytoplankton production. The relative abundance of larger individuals increased with depth, while juveniles concentrated at shallower sites. Size classes prior to the closed season were affected by increased fishing during summer due to tourist demand. Water transparency and bottom temperature were the main factors controlling the distribution and life cycle of sea-bob shrimp. Seasonal changes in biomass could be related to the inshore-offshore migrations of the type-3 life cycle, compounded by the impacts of fishing. Thus, fishing and local hydrography can drive life cycle and distribution patterns of the species, with important management implications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据