长江上游特有鱼类受威胁及优先保护顺序的定量分析

根据本课题组1997～2002年野外渔获物调查数据并结合相关文献资料,运用濒危系数、遗传损失系数和物种价值系数对长江上游16种特有鱼类的优先保护顺序进行了定量分析.结果表明,达到一级急切保护的有达氏鲟(Acipenser dabryanus)、鲈鲤(Percocypris pingi)2种;达到二级急切保护的有宜宾鲴(Xenocypris fangi)、齐口裂腹鱼(Schizothorax prenanti)、四川白甲鱼(Onychostoma angustistomata)及云南鲴(Xenocypris yunnanensis)4种;达到三级急切保护的有岩原鲤(Procypris rabaudi)、厚颌鲂(Megalobrama pellegrini)、宽口光唇鱼(Acrossocheilus monticola)、黑尾近红鲌(Ancherythroculter nigrocauda)、华鲮(Sinilabeo rendahli)、短体副鳅(Paracobitis potanini)、圆口铜鱼(Coreius guichenoti)、长鳍吻鮈(Rhinogobio ventralis)及长薄鳅(Leptobotia elongata)9种;尚未达到急切保护,即处于四级保护的为异鳔鳅鮀(Gobiobotia boulengeri).

A quantitative analysis on threat and priority of conservation order of the endemic fishes in upper reaches of the Yangtze River

The coefficient of endangerment genetic lost and species value with field investigation and combination of the related documents and data were applied for quantitative analysis of the priority of conservation order of 16 endemic fish species in upper reaches of the Yangtze River. Two species (Acipenser dabryanus, Percocypris pingi) reached the first-class protection; four species (Xenocypris fangi, Schizothorax prenanti, Onychostoma angustistomata, Xenocypris yunnanensis) reached the second; nine species (Procypris rabaudi, Megalobrama pellegrini, Acrossocheilus monticola, Ancherythroculter nigrocauda, Sinilabeo rendahli, Paracobitis potanini, Coreius guichenoti, Rhinogobio ventralis, Leptobotia elongata) reached the third; one species (Gobiobotia boulengeri) reached the fourth, and did not reach impatient protection.