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Growth of juvenile black rockfish (Sebastes melanops) during estuarine residence
Environmental Biology of Fishes ( IF 1.4 ) Pub Date : 2021-07-16 , DOI: 10.1007/s10641-021-01106-7
Brittany D. Schwartzkopf 1 , Scott A. Heppell 1 , Lorenzo Ciannelli 2 , John C. Garza 3
Affiliation  

Many juvenile fishes have specific habitat requirements, and while some habitats may be more important than others for growth and survival, habitat-specific growth and survival information is missing for the sensitive juvenile life stage of many species. Given the potential impact of habitat productivity on growth and the importance of growth to survival, we evaluated the influence of specific estuarine habitats on post-settlement growth of a marine fish. Juvenile black rockfish (Sebastes melanops) were collected from May to September over 2 years at both anthropogenic (dock) and natural (eelgrass) habitats in a marine-dominated estuary on the central Oregon coast. Recent growth decreased throughout each year, which correlates with an increase in fish size. Recent growth did not differ between habitats in 2016, a year of increased upwelling, but did differ between habitats in 2017, when upwelling was reduced. Recent growth remained high between years at the eelgrass habitat but greatly decreased at the dock habitat between years. During high upwelling years, Yaquina Bay may be an extension of nearshore waters, where a high diversity of prey resources and less variation in source of nutrients leads to high juvenile black rockfish growth rates regardless of habitat type. In years of variable ocean conditions, however, habitat type may become more important for growth, with eelgrass providing a higher quality and more consistent habitat compared to anthropogenic structures, and therefore contributing to consistent and higher interannual growth rates.



中文翻译:

黑石斑鱼幼鱼(Sebastes melanops)在河口栖息期间的生长

许多幼鱼都有特定的栖息地要求,虽然一些栖息地对生长和生存可能比其他栖息地更重要,但许多物种在敏感的幼鱼生命阶段缺少特定栖息地的生长和生存信息。鉴于栖息地生产力对生长的潜在影响以及生长对生存的重要性,我们评估了特定河口栖息地对海洋鱼类定居后生长的影响。幼年黑石斑鱼(Sebastes melanops) 从 5 月到 9 月,在俄勒冈州中部海岸以海洋为主的河口的人为(码头)和自然(鳗草)栖息地收集了 2 年的时间。最近的增长每年都在下降,这与鱼的大小增加有关。2016 年,上升流增加的一年,栖息地之间的近期增长没有差异,但在上升流减少的 2017 年,栖息地之间的增长确实有所不同。最近几年间,鳗草栖息地的增长率仍然很高,但几年间码头栖息地的增长率却大大下降。在上升流高的年份,亚奎纳湾可能是近岸水域的延伸,无论栖息地类型如何,这里猎物资源的高度多样性和营养来源的变化都导致黑石斑鱼幼鱼的生长率很高。然而,在多年变化的海洋条件下,

更新日期:2021-07-16
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