Seasonal migrations of plaice (Pleuronectes platessa) through the Dover Strait
Seasonal migrations of plaice (Pleuronectes platessa) through the Dover Strait
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鲽鱼 (Pleuronectesplatessa) 通过多佛海峡的季节性迁徙
DOI：
10.1007/bf00993655
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
J. Metcalfe
中科院分区：
文献类型：
--
作者：
G. Arnold;J. Metcalfe
对1985年和1988年11月至次年3月的五个月中拖网试验结果进行分析，揭示了欧鲽（Pleuronectes platessaL.）穿过北海南部海湾和英吉利海峡之间的多佛海峡。成熟鱼的中层水渔获量最高的南去tidespriorto高峰产卵（1月下旬），而渔获的花鱼，最高的北去tidesafterpeak产卵。对渔获量数据的详细分析提供的证据表明，雄鱼比雌鱼更早完成产卵前的洄游，产卵后的洄游则更晚，因此在产卵场停留的时间更长。未成熟的雌鱼渔获量表明，南迁移后，成熟的鱼。这种“假运行”可能是一种方法，通过这种方法，未成熟的比目鱼利用高密度的成熟和产卵鱼的存在来了解产卵场的位置。分析还表明，白天和晚上渔获量的差异不太可能是白天避开渔具的结果。研究结果证实，选择性的潮流运输是欧洲大陆架上的快速潮流地区的欧鲽的一个关键的迁移机制。
Analysis of paired-haul mid-water trawling experiments conducted in the five months November to March during the years 1985 and 1988 revealed the seasonal pattern of migration of plaice (Pleuronectes platessaL.) moving through the Dover Strait between the Southern Bight of the North Sea and the English Channel. Mid-water catches of maturing fish were highest on south-going tidespriorto peak spawning (late January), while catches of spent fish, were highest on north-going tidesafterpeak spawning. Detailed analysis of the catch data provided evidence that males complete their pre-spawning migration earlier, and their post-spawning migration later, than female fish and consequently spend more time on the spawning ground. Catches of immature female fish indicated a migration south following that of the mature fish. This “dummy run” may be a method by which immature plaice use the presence of high densities of mature and spawning fish to learn the location of the spawning ground. The analysis also indicated that differences in catch rates between day and night are unlikely to be the result of gear avoidance by day. The results confirm that selective tidal-stream transport is a key migratory mechanism for plaice in areas of fast tidal streams on the European continental shelf.