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为探讨我国极危物种中国大鲵(Andrias davidianus)的保护策略,于2014年8月22日至9月11日在日本实地调查和文献查询日本大鲵(A.japonicus)的现状,结果发现分布区各地均有众多的志愿者参与日本大鲵的保护和研究,其种群密度达到38.2-64.3尾/km(N=5),平均遇见率44.3±34.6(SD)尾/km(N=11),能够参加繁殖的雄雌比例介于1.5:1与9.6:1间(N=3).繁殖地多为乡村溪流的河岸洞穴,受修筑堰坝、硬化河岸以及改造河道的影响,部分地方种群的繁殖补充量极低,在京都府、三重县和奈良县还面临外来物种中国大鲵的入侵、竞争以至杂交的威胁,个别地方杂交个体所占比例高达90%.这启示我们,在保护我国大鲵时,应注意控制增殖放流的强度、选择适宜的放流地点并加强放流个体的遗传背景检测.图4表2参26
In order to explore the conservation strategy of Andrias davidianus, a critically endangered species in China, the status quo of A. japonicus in Japan from August 22 to September 11, 2014 was surveyed in Japan. The results showed that all the distribution areas A large number of volunteers participated in the conservation and research of Japanese raccoon dogs and their population density reached 38.2-64.3 hk / km (N = 5) with an average encounter rate of 44.3 ± 34.6 (SD) tail / km (N = 11) Propagation of male and female ratio between 1.5: 1 and 9.6: 1 (N = 3). Breeding is mostly river creek caves, by the construction of barrage, hardened river banks and the impact of the transformation of the river, some local population breeding supplement In Kyoto Prefecture, Mie Prefecture and Nara Prefecture, the number of hybrid individuals in individual places still accounts for as much as 90% of the invasive alien species of Chinese big cats, threatening competition and hybridization, which indicates that we should, at the time of our protection, Attention should be paid to controlling the intensity of proliferation release, selecting appropriate release sites and enhancing the genetic background of individuals excreted.