Timing and periodicity of migrating New Zealand freshwater eels (Anguilla spp.)
Timing and periodicity of migrating New Zealand freshwater eels (Anguilla spp.)
复制标题
新西兰淡水鳗鱼（安圭拉属）迁徙的时间和周期
DOI：
10.1080/00288330.1981.9515915
复制
发表时间：
1981
影响因子：
1.6
通讯作者：
P. R. Todd
中科院分区：
文献类型：
--
作者：
P. R. Todd
摘要成年淡水鳗澳鳗和澳洲鳗的洄游。在3个地区研究了dieffenbachii：Ellesmere湖（坎特伯雷）（43 ° 48 ′ S，172 ° 31 ′ E）; Onoke湖（Wairarapa）（41 ° 23 ′ S，175 ° 08 ′ E）;和Makara溪（惠灵顿）（41 ° 13 ′ S，174 ° 43 ′ E）。在埃尔斯米尔湖，迁徙的鳗鱼从1月开始聚集在离海最近的出口地区，一直持续到6月。鳗鱼是按一定的顺序到达的：A。australis雄性、雌性; A.花叶万年青雄性雌性商业渔获量表现出月球周期性最大的渔获量发生在最后一个季度和最小的渔获量在满月。没有明显的环境因素与迁移，除了最大的商业渔获量是在高湖平面的时候。如果在迁徙过程中湖泊向大海开放，迁徙鳗鱼的捕捞活动就会停止，它们就会逃到海里。在Onoke湖，迁移的鳗鱼聚集在最靠近大海的浅水区，从2月开始，一直持续到5月或5月。
Abstract The migration of adult freshwater eels Anguilla australis and A. dieffenbachii was studied in 3 areas: Lake Ellesmere (Canterbury) (43°48′S, 172°31′E); Lake Onoke (Wairarapa) (41°23′S, 175°08′E); and the Makara Stream (Wellington) (41°13′S, 174°43′E). In Lake Ellesmere, migrating eels began congregating at the outlet area nearest the sea in January and continued until June. Eels arrived in a definite sequence: A. australis males, females; A. dieffenbachii males, females. Commercial catches exhibited a lunar periodicity with largest catches occurring just after the last quarter and smallest catches during the full moon. No obvious environmental factors were associated with the migration except that the largest commercial catches were made at times of high lake level. If the lake is opened to the sea during migration, fishing for migrating eels ceases and they escape out to sea. In Lake Onoke, aggregation of migrating eels in shallow areas nearest the sea began in February and lasted until May or J...