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日本鲭(Scomber japonicus)是我国近海重要经济鱼种,海洋环境变动对鱼类生命周期中最为脆弱的鱼卵和仔幼鱼的生长、存活直至种群补充产生重大的影响,其中产卵深度变动对其是否会产生影响,目前尚不清楚。为此,本文拟采用FVCOM(Finite-Volume Coastal Ocean Model)物理模型来模拟三维物理场,使用基于个体模型IBM(individual-based model)参数化并模拟日本鲭的早期生活史,从而建立起基于物理-生物个体的东海日本鲭初期生态耦合模型,使用该耦合模型模拟了日本鲭产卵水深不同导致鱼卵仔幼鱼从产卵场向育肥场的输运过程中经历物理环境的差异对鱼卵仔幼鱼的输运分布以及存活率的影响。研究发现,产卵深度的变动,未对鱼卵仔幼鱼的输运分布产生明显影响,但在输运过程中所处水深和水温的微小差异却导致了变浅(5 m)和加深(15 m)产卵深度鱼卵仔幼鱼的存活率降低,正常产卵深度(10 m)是最佳的产卵水深。因此,研究认为产卵深度的细微变动将会对东海日本鲭鱼卵仔幼鱼的存活率产生影响,但对鱼卵仔幼鱼输运则影响不大。
Scomber japonicus is an important economic species in the coastal waters of our country. The changes of the marine environment have a significant impact on the growth and survival of the fish and juveniles that are the most vulnerable in the fish’s life cycle. Whether it will have an impact is not yet clear. Therefore, this paper intends to use FVCOM physical model to simulate the three-dimensional physical field, and use IBM (individual-based model) to model and simulate the early life history of Japanese mackerel based on the physical - The initial ecological coupling model of the Japanese mackerel in the East China Sea by using this coupling model to simulate the differences in the physical environment during the transport of fish and oyster juveniles from the spawning site to the fattening site due to the different water depths of Japanese mackerel. Transport distribution of juveniles and survival effects. The study found that the changes of egg laying depth had no significant effect on the transport and distribution of juvenile fish eggs, but the slight differences of water depth and water temperature during transport led to the shallowing (5 m) and deepening 15 m). The survival rate of larvae of egg laying larvae decreased. The normal oviposition depth (10 m) was the best oviposition depth. Therefore, the study suggests that subtle changes in oviposition depth will have an impact on the survival rate of juvenile Japanese oyster mackerel eggs in the East China Sea, but little effect on the larval fish-eggfish transport.