沿海复杂性对温带淡水水库早期幼鱼群落昼夜分布的影响

IF 1.6 3区 农林科学 Q3 FISHERIES Ecology of Freshwater Fish Pub Date : 2023-07-16 DOI:10.1111/eff.12740
Zuzana Sajdlová, Tomáš Jůza, Vladislav Draštík, Jaromír Seďa, Martin Čech
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引用次数: 1

摘要

研究了两个不同淹没水生植被覆盖的温带淡水水库早期幼鱼群落的昼夜分布。白天,富含植物的Žlutice水库的幼鱼群落约99.9%分布在潜水植被近岸带,平均丰度为~7982个。相比之下,在远洋栖息地,白天发现的鱼很少。在植物贫乏的Římov水库,98.9%的幼鱼在白天占据上层生境,平均丰度为~333个。1000 m−3。两种水体中上层生境鱼类的垂直分布均受明显的热、氧分层影响,6 m以下均无个体出现。夜间,88.8%的幼鱼群落位于上层生境,平均丰度为~1423只。1000 m−3。与Římov水库的群落相比,它们的昼夜水平变化更为明显,后者的夜间远洋平均丰度为~523个。1000 m−3。Římov水库中仅有1.1%的幼鱼群落在白天出现在沿岸,0.7%出现在夜间,平均白天丰度为~1688头。1000 m−3,夜间平均丰度为~1664个。研究表明,在温带层状水库中,如果存在发育良好的滨海带和丰富的水生植被,早期幼鱼将进行昼夜水平运动。
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The effect of littoral complexity on the diel distribution of early juvenile fish communities in temperate freshwater reservoirs

The diel distribution of early juvenile fish communities from two temperate freshwater reservoirs that differed in cover of submerged aquatic vegetation was investigated. In the daytime, about 99.9% of the juvenile fish community from the plant-rich Žlutice Reservoir was found in the nearshore belt of submerged aquatic vegetation reaching an average abundance of ~7982 inds. 1000 m−3. In contrast, in the pelagic habitat, few fish were found at day. In the plant-poor Římov Reservoir, 98.9% of juveniles occupied the pelagic habitat during daytime and reached an average abundance of ~333 inds. 1000 m−3. Vertical distribution of fish in the pelagic habitat in both water bodies was affected by steep thermal and oxygen stratification and no individuals occurred below 6 m depth. At night, 88.8% of the juvenile fish community from the plant-rich Žlutice Reservoir was in the pelagic habitat with an average abundance of ~1423 inds. 1000 m−3. Their diel horizontal shifts were much more pronounced compared to the community from the Římov Reservoir that reached an average nighttime pelagic abundance of ~523 inds. 1000 m−3. Only 1.1% of the juvenile fish community in the Římov Reservoir was found in the littoral during the daytime and 0.7% at night reaching an average daytime abundance of ~1688 inds. 1000 m−3 and average nighttime time abundance of ~1664 inds. 1000 m−3. This study indicates that if a well-developed littoral zone with abundant aquatic vegetation is present, early juvenile fish will perform diel horizontal movement in temperate stratified reservoirs.

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来源期刊
Ecology of Freshwater Fish
Ecology of Freshwater Fish 农林科学-海洋与淡水生物学
CiteScore
4.10
自引率
0.00%
发文量
45
审稿时长
12-24 weeks
期刊介绍: Ecology of Freshwater Fish publishes original contributions on all aspects of fish ecology in freshwater environments, including lakes, reservoirs, rivers, and streams. Manuscripts involving ecologically-oriented studies of behavior, conservation, development, genetics, life history, physiology, and host-parasite interactions are welcomed. Studies involving population ecology and community ecology are also of interest, as are evolutionary approaches including studies of population biology, evolutionary ecology, behavioral ecology, and historical ecology. Papers addressing the life stages of anadromous and catadromous species in estuaries and inshore coastal zones are considered if they contribute to the general understanding of freshwater fish ecology. Theoretical and modeling studies are suitable if they generate testable hypotheses, as are those with implications for fisheries. Manuscripts presenting analyses of published data are considered if they produce novel conclusions or syntheses. The journal publishes articles, fresh perspectives, and reviews and, occasionally, the proceedings of conferences and symposia.
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