【摘要】 根据1997年12月至1999年6月利用“北斗”号调查船的SimradEK500回声探测-积分系统在南海北部海域获取的渔业资源调查资料,运用渔业资源声学评估方法对该海域的带鱼科(Trichiuridae)鱼类、蓝圆(Decapterusmaruadsi)、竹鱼(Trachurusjaponicus)、金线鱼科(Nemipterus)鱼类以及大眼鲷科(Priacanthidae)鱼类等5类23种经济鱼类进行了评估与分析。结果表明,在南海北部海域带鱼科、蓝圆、竹鱼、金线鱼科和大眼鲷科的资源量分别为50.4×104t、16.3×104t、10.4×104t、9.8×104t和9.2×104t,其中带鱼科的资源量密度以冬季和粤西海域最高,蓝圆和竹鱼的资源量密度都以秋季和粤东海域最高,但竹鱼的资源量密度秋季明显高于其他季节。金线鱼科秋季在112°30′～116°E珠江口近海海域自西南到东北出现高度密集分布带,大眼鲷科在南海北部海域的分布较广泛,没有出现明显的高度密集区。更多还原

【Abstract】 Acoustic surveys of fish stocks in the north waters of South China Sea were conducted using calibrated Simrad EK500 echosounder on board R/V "Beidou" in spring （April to June）,summer （July to September）,autumn （October to December） and winter （December to February） from December 1997 to June 1999,and the survey sea area was 99?724?（n mile）²,104?833?（n mile）²,94?485?（n mile）² and 140?426?（n mile）² for spring,summer,autumn and winter,respectively.Based on the data,multi-species acoustic assessments were carried out for each stratum on the basis of taxonomical groups.Though the acoustic survey has been conducted successfully in the Yellow Sea since 1984,it was the first time in South China Sea.In addition,multi-species acoustic assessments were carried out for the first time in China.This paper assessed mainly the stocks of 23 species of 5 commercial taxonomical groups （Trichiuridae,Decapterus maruadsi,Trachurus japonicus,Nemipterus and Priacanthidae） using multi-species acoustic assessment means.The results showed that stocks of Trichiuridae,Decapterus maruadsi,Trachurus japonicus,Nemipterus and Priacanthidae were 50.4×10⁴?t,16.3×10⁴?t,10.4×10⁴?t,9.8×10⁴?t and 9.2×10⁴?t,respectively,in the north waters of South China.Seasonal variation and sea area variation in stock density of Trichiuridae was obvious that the highest in winter and in west Guangdong waters,and it was low in the sea area around 200?m of water depth.The highest stock density of Decapterus maruadsi and Trachurus japonicus occurred both in the autumn and in east Guangdong waters.Though the dense area of Decapterus maruadsi was not obvious compared with the past,distribution of Decapterus maruadsi was wide in the north waters of South China Sea.The stock density of Trachurus japonicus in autumn was higher than that in other seasons,and moreover,dense area occurred in offshore Guangdong.The dense area of Nemipterus occurred mainly in the sea area of 112°30′-116°E from southwest to northeast along the Pearl River estuary in autumn.Priacanthidae was distributed widely in the north waters of South China Sea,but there was not obvious dense area.更多还原