Determinate Versus Indeterminate Fecundity in American Shad, an Anadromous Clupeid
Determinate Versus Indeterminate Fecundity in American Shad, an Anadromous Clupeid
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美国鲥鱼（一种溯河产卵的鲫鱼）的确定性与不确定性繁殖力
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发表时间：
2014
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影响因子：
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通讯作者：
J. Olney
中科院分区：
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作者：
A. Hyle;R. McBride;J. Olney
摘要美国沙的历史生殖力估计使用了一种确定的方法，估计年生殖力的卵母细胞在一个单一的时间点产卵前的常备库存。这样的生殖力估计已经（1）从加拿大海洋到佛罗里达的人口报告，（2）应用于生活史进化的假设检验，和（3）用于人口模型，以建议管理政策。然而，美国沙德卵黄卵母细胞离合器的异步发展，这表明，新的卵母细胞可能会出现在产卵开始后，一个确定的生育力的方法向下偏置的结果。如果是这样的话，年繁殖力应该是一个产品的批量大小和批次的数量-一个不确定的繁殖力的方法。我们调查了卵母细胞招聘，闭锁，产卵间隔使用性腺组织学的女性从Mattaponi河，弗吉尼亚州。批量大小（即，产卵前水合卵母细胞的数量）是用重量法估计的。
AbstractHistorical fecundity estimates of American Shad Alosa sapidissima used a determinate method that estimated annual fecundity as the standing stock of oocytes at a single point of time prior to spawning. Such fecundity estimates have been (1) reported for populations from the Canadian Maritimes to Florida, (2) applied to hypothesis tests of life history evolution, and (3) used in demographic models to advise management policy. However, American Shad have asynchronous development of yolked oocyte clutches, which suggests that new oocytes could arise after spawning commences, biasing the results of a determinate fecundity method downward. If so, annual fecundity should be a product of batch size and the number of batches—an indeterminate fecundity method. We investigated oocyte recruitment, atresia, and spawning intervals using gonad histology of females from the Mattaponi River, Virginia. Batch size (i.e., the number of hydrated oocytes prior to a spawning event) was estimated using a gravimetric met...