Ikuma SUGIYAMA
About the change in the aquatic environment of the sea area around the Kashiwazaki port where a genital situation of [ishimozuku] was assumed to be an index
Tokuzo HOSOYAMADA , Naoyuki INUKAI
The fishing industry is actively done in Japan, and the fishing industry is important industry in Niigata Prefecture. Especially, [ishimozuku] is important marine products in Niigata Prefecture. However, it is not known well about the ecosystem of [ishimozuku]. Then, [ishimozuku] investigates a genital current state of [ishimozuku], and aims to understand how the aquatic environment of the sea area around Kashiwazaki is going now to the grasp whether living under what condition, and the assumption of [ishimozuku] an index in the present study. The present study clarified a genital condition of [ishimozuku] as the former stage, and understood the element that influenced and existed in the genital.
First of all, the growth condition of [ishimozuku] was understood from information that executed the site investigation in the vicinity of the Kashiwazaki port in cooperation with Niigata Prefecture and obtained it and information, etc. obtained from the hearing survey etc. to the thesis and the person in the past related to the fishery.
Next, a change with the lapse of time of the element thought to be deeply related to the understood genital environment was overlapped, and the relativity of those items and the growth conditions of [ishimozuku] was examined. As a result, the result of saying of the relation of the total durations of sunshine at time and the promotion period when waves of 4m or more in the parasitism period and winter appeared to growth was obtained.
It has been understood to be able to understand the environmental transformation more in detail by being able to understand the presence of the environmental transformation by examining the haul of [ishimozuku], and examining the parasitism area and the wet weight above.
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