Morphometric changes, gonad histology, and fecundity estimates in migrating New Zealand freshwater eels (Anguilla spp.)
Morphometric changes, gonad histology, and fecundity estimates in migrating New Zealand freshwater eels (Anguilla spp.)
复制标题
新西兰淡水鳗鱼（安圭拉属）洄游的形态变化、性腺组织学和繁殖力估计
DOI：
10.1080/00288330.1981.9515908
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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
摘要在澳洲鳗鲡（Anguilla australis）和澳洲鳗鲡（A. Dieffenbachii雄性眼睛面积增加2倍，雌性增加1.5-1.6倍。A.在产卵洄游的初期，花叶万年青的性发育较成熟。在雄性中，性腺体比（GSR）为0.5-2.7，组织切片显示精母细胞是精子发生的最常见阶段。对于. australis的GSR为0.03-0.70，组织学上以精原细胞为主。以.万年青雌性的平均GSR为8.12，平均卵直径为0.33 mm，组织切片显示大多数卵处于卵黄沉积阶段。与此相反，A.南方古猿雌虫3.5只，卵径平均0.22mm，卵黄期卵少。卵数表明，繁殖力与总长度增加。对23 A. dieffenbachii（全长711-1452 mm）的变异范围为105万~ 2083万，26 A.澳大利亚...
Abstract During transition from the non‐migrant feeding stage to the migrant stage in Anguilla australis and A. dieffenbachii the eyes increase in area by a factor of 2 in males and of 1.5–1.6 in females. A. dieffenbachii is more sexually advanced at the beginning of the spawning migration. In males the gonadosomatic ratio (GSR) was 0.5–2.7 and histological sections showed spermatocytes as the most common stage of spermatogenesis. For A. australis the GSR was 0.03–0.70, and histologically spermatogonia were predominant. In A. dieffenbachii females the mean GSR was 8.12, mean egg diameter was 0.33 mm, and histological sections showed that most eggs were at the stage of yolk deposition. In contrast, the mean GSR of A. australis females was 3.5, mean egg diameter was 0.22 mm, and few eggs were at the yolked stage. Egg counts showed that fecundity increased with total length. Fecundity estimates for 23 A. dieffenbachii (total length 711–1452 mm) varied from 1.05 million to 20.83 million and for 26 A. australi...