Reproductive ecology of the Far Eastern catfish, Silurus asotus (Siluridae), with a comparison to its two congeners in Lake Biwa, Japan
Reproductive ecology of the Far Eastern catfish, Silurus asotus (Siluridae), with a comparison to its two congeners in Lake Biwa, Japan
复制标题
远东鲶鱼（鲶科）的繁殖生态学，与其在日本琵琶湖的两种同系物的比较
DOI：
10.1007/s10641-006-9083-7
复制
发表时间：
2007
影响因子：
1.4
通讯作者：
M. Maehata
中科院分区：
文献类型：
--
作者：
M. Maehata
鲇鱼（Silurus asotus）的产卵活动在四月底至八月底的临时水域（稻田）进行，时间从傍晚至午夜，通常与降雨有关。鲶鱼的产卵与降水、浊度、水深和水温等水文参数相关。鲶鱼的产卵习性，特别是使用临时水域，如降雨后或灌溉后被淹没的稻田，被认为是为了适应亚洲雨季明显的季风气候。鲶鱼的表观性别比例明显偏向雌性。在当地种群中观察到该物种的生殖生态，特别是交配行为的种内变异。本文通过比较琵琶湖琵琶鱼种群的交配行为、生殖环境和性别比，讨论了可能导致这种差异的因素。在美国的琵琶湖流域，有两种不同种类的鲶鱼。biwaensisandS。lithophilus。
Spawning activity of the catfish,Silurus asotus, takes place in temporary water (rice fields) from early evening to midnight, generally in connection with rainfall, from late April to late August. Spawning of the catfish was correlated with hydrographic parameters dependent on rainfall: daily precipitation, turbidity, water depth, and water temperature. The spawning habits of the catfish, and in particular the use of temporary waters such as rice fields that become submerged after rainfall or by irrigation, are presumed to be adaptations to the Asian monsoon climate with a pronounced rainy season. The apparent sex ratio of the catfish was extremely biased toward females. Intraspecific variation in the reproductive ecology, particularly mating behavior, of this species is observed among local populations. Factors that may have caused this variation are discussed in the context of a comparison of mating behavior, reproductive environment, and sex ratio between the Lake Biwa population ofS. asotusand other conspecific populations, as well as two other species of silurid catfish that occur in the Lake Biwa drainage,S. biwaensisandS. lithophilus.