Density-Dependent Maturation, Growth, and Female Dominance in Lake Superior Lake Herring (Coregonus artedii)
Density-Dependent Maturation, Growth, and Female Dominance in Lake Superior Lake Herring (Coregonus artedii)
复制标题
苏必利尔湖鲱鱼 (Coregonus artedii) 的密度依赖性成熟、生长和雌性优势
DOI：
10.1139/f91-072
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发表时间：
1991
影响因子：
2.4
通讯作者：
Ronald J. Albrecht
中科院分区：
文献类型：
--
作者：
S. Bowen;D. J. D'Angelo;Stephen H. Arnold;Michael J. Keniry;Ronald J. Albrecht
在极低密度下，与密度相关的成熟年龄、新兵性别比例、生长和繁殖力的变化导致产卵种群由许多年长的雌性和很少的年轻雄性组成，其中每条湖鲱鱼的产卵量增加了五倍。在低密度条件下，雌性成熟期延迟，而雄性成熟期延迟。因此，从2岁的 +到6岁的 +，男性在最年轻的年龄段占主导地位，但女性的数量越来越多。一个湖泊鲱鱼种群结构的模型表明，尽管延迟成熟可以解释衰退种群的许多特征，但它不能解释整个种群的雌性化。该模型被用来评估不同的成人死亡率、招募失败和新兵性别比变化的影响，只有后者才能充分解释总体女性。尽管这些反应具有明显的补偿性，但苏必利奥湖萧条的缓慢和不稳定的恢复…
Density-related changes in age at maturation, sex ratio of recruits, growth, and fecundity at very low density result in spawning populations which comprise many older females and few young males and in which egg production per lake herring (Coregonus artedii) is increased by a factor of five. Age of maturation is delayed at low density for females, but not for males. Thus, males dominate the youngest age classes but females become increasingly more abundant from age 2 + through age 6 +. A model of lake herring population structure showed that although delayed maturation accounts for many characteristics of depressed populations, it does not explain overall population femaleness. The model was used to evaluate effects of differential adult mortality, recruitment failure, and changes in the sex ratio of recruits, and only the latter provided an adequate explanation for overall femaleness. Despite the apparently compensatory nature of these responses, the slow and unsteady recovery of depressed Lake Superio...