渔业部门与科学界之间的合作:在波罗的海东南部鲱鱼(Culpea harengus)和鲱鱼(Sprattus sprattus)觅食地捕鱼期间进行 CTD 探针测量

IF 2.6 3区 地球科学 Q2 OCEANOGRAPHY
Piotr Pieckiel , Diana Dziaduch , Lidia Dzierzbicka-Głowacka , Marcin Kalarus
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引用次数: 0

摘要

对 282 个 CTD 探头的测量结果进行了分析,以确定水体的温度、盐度、深度和氧饱和度等参数。这些测量数据是在商业性中上层捕捞鲱鱼(Clupea harengus)和鲱鱼(Sprattus sprattus)期间进行的。这些物种目前是波罗的海商业捕捞的主要目标。研究于 2018-2022 年期间在波罗的海东南部进行,主要是在格但斯克深海,大部分时间是在白天。每年影响捕鱼策略和单位努力量渔获量增加的主要因素是温度。无论在哪个季节,捕捞期间最常测量到的温度约为 5.8°C,而在最丰富的冬季,温度为 5°C。这是波罗的海温跃层和次温跃层形成边界内的温度值。形成的鱼群在白天随该层动态移动,全年出现在不同深度,最高可达 65.7 米。与鲱鱼相比,鲱鱼在水体深层和温度较低时数量更多。冬季,在卤线水平观察到鱼群,这可能与该季节存在首选的最佳食物基地密切相关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Cooperation between the fishery sector and science: CTD probe measurements during fishing catches on the feeding grounds of herring (Culpea harengus) and sprat (Sprattus sprattus) in the south-eastern part of the Baltic Sea

282 CTD probe measurements were analysed for the parameters of temperature, salinity, depth and oxygen saturation of the water column. These measurements were taken during commercial pelagic fishing for herring (Clupea harengus) and sprat (Sprattus sprattus). These species are currently the main target of commercial fishing in the Baltic Sea. Research was carried out throughout the years 2018–2022 in the south-eastern Baltic Sea, mainly in the Gdańsk Deep, mostly during the daytime. The main factor that influenced both, fishing strategy and the increase in catch per unit effort throughout each year, was temperature. Regardless of the season, the most frequent temperature measured was around 5.8°C during fishing, and 5°C in the most abundant winter season. This is the value occurring within the boundaries of the formation of the thermocline and the hypolimnion layer in the Baltic Sea. The formed shoals of fish moved dynamically with this layer in the daytime and occurred throughout the year at various depths in a range of up to 65.7 m. A stronger reaction to temperature changes was also observed for sprat, which is the most exploited fish in the Baltic Sea. This species was observed to be more numerous in the deeper layers of the water column and at lower temperatures than herring. In the winter, shoals of fish were observed at the level of the halocline, which may be strongly related to the presence of a preferred optimal food base in this season.

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来源期刊
Oceanologia
Oceanologia 地学-海洋学
CiteScore
5.30
自引率
6.90%
发文量
63
审稿时长
146 days
期刊介绍: Oceanologia is an international journal that publishes results of original research in the field of marine sciences with emphasis on the European seas.
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