發(fā)布時間：2018-03-07 08:22

  本文選題：帶魚　切入點：資源變動　出處：《浙江海洋大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：帶魚Trichiurus lepturus是中國的主要經(jīng)濟魚類之一,從北海道以南的日本各地沿岸海域到東海、朝鮮半島西岸及黃渤海均有分布,而且同屬于日本�！|海帶魚群系。日本在東黃海海域?qū)~的捕獲以大底拖網(wǎng)漁業(yè)、大中型圍網(wǎng)漁業(yè)和近海底拖網(wǎng)漁業(yè)為主。本文根據(jù)日本水產(chǎn)廳1981年到2009年間的日本海·東海帶魚群系漁獲量和單位努力量漁獲量(CPUE)數(shù)據(jù),對東黃海海域帶魚資源變動進行了統(tǒng)計研究,主要利用年齡結(jié)構(gòu)產(chǎn)量模型(Age-structured production model,ASPM)評估了該海域帶魚群系的資源尾數(shù)和生物量,描述了帶魚的資源變動情況和發(fā)展趨勢。結(jié)果表明,該海域帶魚群系的資源尾數(shù)持續(xù)下降,從1981年的1.7×107尾降至2009年的0.8×107尾。至于年齡組成,4到8齡的資源尾數(shù)急劇下降,從1997年開始幾乎沒有高年齡組資源。從1981年到1985年,帶魚種群生物量急劇減少,從7萬噸降至不足3萬噸。從2003年開始,種群生物量維持在一個較低的水平,低于1981年的10%。參數(shù)敏感性測試表明,相較于其他參數(shù),陡度系數(shù)h和自然死亡系數(shù)M對模型的影響較大。當(dāng)M的值越小時,評估的資源尾數(shù)越小;當(dāng)h的值越大時,資源尾數(shù)下降的速率越慢,即補充的速率越快。
[Abstract]:Trichiurus lepturus is one of the major economic fishes in China, ranging from the coastal waters of Japan south of Hokkaido to the East China Sea, the West Bank of the Korean Peninsula and the Yellow Sea and Bohai Sea. In addition, they belong to the Sea of Japan / East China Sea belt fish formation. Japan catches the belt fish in the East Huang Hai sea area with a large bottom trawling fishery. The large and medium-sized purse seine fishery and the near seabed trawl fishery are the main ones. Based on the data of catch and catch per unit effort of the Sea of Japan / East China Sea tracheid from 1981 to 2009 by Japan Fisheries Agency, In this paper, the variation of tracheid resources in the eastern Huang Hai sea area was studied. The mantissa and biomass of the tubfish formation in the area were evaluated by Age-structured production model (ASPM), an age-structured yield model. This paper describes the resource variation and development trend of the tubfish in this area. The results show that the resource mendings of the tubfish formation in this area have continued to decrease, from 1.7 脳 10 ~ 7 in 1981 to 0.8 脳 10 ~ 7 in 2009. As for the age composition, the resource mendings of the 4th to 8th instar decreased sharply. Since 1997, there have been few resources for the higher age group. From 1981 to 1985, the biomass of the tubfish population decreased sharply, from 70,000 tons to less than 30,000 tons. Since 1985, the biomass of the population has remained at a relatively low level. The parameter sensitivity test shows that the steepness coefficient h and the natural death coefficient M have greater influence on the model than other parameters. The smaller the value of M is, the smaller the resource Mantissa is, and when the value of h is larger, The slower the decrease of resource Mantissa, the faster the rate of replenishment.
【學(xué)位授予單位】：浙江海洋大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：S932.4

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