Wild and farmed burbot Lota lota: differences in energy consumption and behavior during the spawning season

IF 2.2 2区 农林科学 Q2 FISHERIES Aquaculture Environment Interactions Pub Date : 2021-03-11 DOI:10.3354/meps00389
O. Slavík, P. Horký
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引用次数: 1

Abstract

Farmed fish released in a native environment can display different spawning behaviour compared to their wild conspecifics. In our study, farmed and wild burbot, a species recently introduced for aquacultural production, were equipped with electromyogram (EMG) radio tags. EMG biotelemetry allows a description of the spatial distribution of fish together with simultaneous measurements of individual energy consumption. Farmed burbot were released into the wild to simulate stocking or hatchery escape and were observed over a nocturnal phase during November to January. The observational period was assumed to cover the whole spawning season, including an expected peak of spawning activity determined according to egg production by naturally spawning burbot in an experimental seminatural river channel. We detected increased energy consumption and lower movement activity at the time of expected peak spawning for wild burbot only. Across the whole spawning season, farmed females showed lower movement activity and energy consumption than wild females, whereas the opposite results were found for farmed males. Farmed and wild fish kept larger distances between each other than the individuals within a group (farmed and wild) across the whole spawning season. The closest positions occurred between males and females in the wild group, while for farmed fish, the closest position was found within the same sex. Sexually conditioned energy consumption and spatial distribution differed between wild and farmed fish.
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野生和养殖的河豚:产卵季节能量消耗和行为的差异
在自然环境中放生的养殖鱼类与它们的野生同类相比,可以表现出不同的产卵行为。在我们的研究中,养殖和野生burbot(一种最近引进用于水产养殖生产的物种)配备了肌电图(EMG)无线电标签。肌电生物遥测技术可以描述鱼类的空间分布,同时测量个体能量消耗。养殖的burbot被释放到野外,模拟放养或孵化场逃跑,并在11月至1月的夜间阶段进行观察。假设观察期覆盖整个产卵季节,包括根据实验半自然河道中自然产卵的burbot产蛋量确定的预期产卵活动高峰。我们发现,在预期的高峰产卵时间,只有野生burbot的能量消耗增加,运动活动减少。在整个产卵季节,养殖雌鱼的运动活动和能量消耗低于野生雌鱼,而养殖雄鱼则相反。在整个产卵季节,养殖鱼和野生鱼之间的距离比一个群体(养殖和野生)中的个体之间的距离要大。在野生组中,最接近的位置发生在雄性和雌性之间,而在养殖组中,最接近的位置发生在同性之间。野生鱼和养殖鱼的性条件能量消耗和空间分布存在差异。
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来源期刊
Aquaculture Environment Interactions
Aquaculture Environment Interactions FISHERIES-MARINE & FRESHWATER BIOLOGY
CiteScore
4.90
自引率
13.60%
发文量
15
审稿时长
>12 weeks
期刊介绍: AEI presents rigorously refereed and carefully selected Research Articles, Reviews and Notes, as well as Comments/Reply Comments (for details see MEPS 228:1), Theme Sections and Opinion Pieces. For details consult the Guidelines for Authors. Papers may be concerned with inter­actions between aquaculture and the environment from local to ecosystem scales, at all levels of organisation and investigation. Areas covered include: -Pollution and nutrient inputs; bio-accumulation and impacts of chemical compounds used in aquaculture. -Effects on benthic and pelagic assemblages or pro­cesses that are related to aquaculture activities. -Interactions of wild fauna (invertebrates, fishes, birds, mammals) with aquaculture activities; genetic impacts on wild populations. -Parasite and pathogen interactions between farmed and wild stocks. -Comparisons of the environmental effects of traditional and organic aquaculture. -Introductions of alien species; escape and intentional releases (seeding) of cultured organisms into the wild. -Effects of capture-based aquaculture (ranching). -Interactions of aquaculture installations with biofouling organisms and consequences of biofouling control measures. -Integrated multi-trophic aquaculture; comparisons of re-circulation and ‘open’ systems. -Effects of climate change and environmental variability on aquaculture activities. -Modelling of aquaculture–environment interactions; ­assessment of carrying capacity. -Interactions between aquaculture and other industries (e.g. tourism, fisheries, transport). -Policy and practice of aquaculture regulation directed towards environmental management; site selection, spatial planning, Integrated Coastal Zone Management, and eco-ethics.
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