CONSTRAINTS ON EGG MASSES .1. RETARDED DEVELOPMENT WITHIN THICK EGG MASSES
CONSTRAINTS ON EGG MASSES .1. RETARDED DEVELOPMENT WITHIN THICK EGG MASSES
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DOI：
10.1016/0022-0981(84)90231-4
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发表时间：
1984-01-01
影响因子：
2
通讯作者：
STRATHMANN, RR
中科院分区：
文献类型：
--
作者：
CHAFFEE, C;STRATHMANN, RR
头足纲腹足类Melanochlamys diomedea （Bergh）和多毛纲纲Nereis vexillosa Grube凝胶状卵团深处的胚胎发育速度比靠近卵团表面的胚胎慢。在一些田间地点，田葵卵块的非同步发育开始时间比其他地点早。在实验室的静水中，diomedea的卵团的非同步性特别明显，当卵团分裂时，同步性更大，孵化完成得更早。在相同的野外地点和生境中，头蛛Haminoea vesicula （Gould）的薄凝胶状卵带与diomedea的较厚且不同步发育的球形卵团是同步发育的。卵团的形状和大小影响发育速度，但这种影响尚未包括在生活史适应模型中。
Embryos deep within gelatinous egg masses of the cephalaspidean gastropod Melanochlamys diomedea (Bergh) and the nereid polychaete Nereis vexillosa Grube develop more slowly than embryos near the surface of the egg mass. The onset of asynchronous development in egg masses of M. diomedea is earlier at some field sites than others. Asynchrony in egg masses of M. diomedea is especially pronounced in still water in the laboratory, and synchrony is greater and hatching completed earlier when the egg mass is divided. Development is synchronous in the thin gelatinous egg ribbons of the cephalaspidean Haminoea vesicula (Gould) from the same field sites and habitat as the thicker and asynchronously developing spheroidal egg masses of M. diomedea. Form and size of egg masses affect rates of development, but this effect has not been included in models of life history adaptations.