Fertilization success in <i>Galeolaria caespitosa</i> (Polychaeta: Serpillidae): gamete characteristics, role of sperm dilution, gamete age, and contact time
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چکیده
منابع مشابه
Kinetics of Fertilization in the Sea Urchin Strongylocentrotus franciscanus: Interaction of Gamete Dilution, Age, and Contact Time.
Determining fertilization success of free spawning organisms in the field requires knowledge of how eggs and sperm interact under varying encounter frequencies and durations. In the laboratory, we investigated the relative influence of sperm concentration, egg concentration, sperm-egg contact time, and sperm age on fertilization in the sea urchin Strongylocentrotus franciscanus. Our results ind...
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A review of 392 cycles of in-vitro fertilization (IVF) was carried out in order to identify whether any factors such as sperm concentration at insemination, sperm motility or morphology, oocyte grading, number of oocytes retrieved, patient age, follicular stimulation protocols or duration of follicular growth, could be associated with the incidence of polyploidy or completely failed fertilizati...
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We have developed an assay for detecting the acrosome reaction in mouse sperm using chlortetracycline (CTC) as a fluorescent probe . Sperm known to be intact with nonreacted acrosomes show CTC fluorescence in the presence of Ca" over the anterior portion of the sperm head on the plasma membrane covering the acrosome . Sperm which have undergone the acrosome reaction do not show fluorescence on ...
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Gamete production for both males and females can be energetically expensive such that selection should maximize fertilization opportunities while minimizing fertilization costs. In laboratory studies of Drosophila reproduction, however, the failure of eggs to yield adult progeny can be quite high, suggesting that female control over gamete utilization is surprisingly inefficient. We examined ga...
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Both gamete competition and gamete limitation can generate anisogamy from ancestral isogamy, and both sperm competition (SC) and sperm limitation (SL) can increase sperm numbers. Here, we compare the marginal benefits due to these two components at any given population level of sperm production using the risk and intensity models in sperm economics. We show quite generally for the intensity mod...
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ژورنال
عنوان ژورنال: Scientia Marina
سال: 2006
ISSN: 1886-8134,0214-8358
DOI: 10.3989/scimar.2006.70s3309