Production of F1 Offspring with Vitrified Sperm from a Live-Bearing Fish, the Green Swordtail Xiphophorus hellerii
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چکیده
منابع مشابه
Maternal Size and Age Shape Offspring Size in a Live-Bearing Fish, Xiphophorus birchmanni
Many studies of offspring size focus on differences in maternal investment that arise from ecological factors such as predation or competition. Classic theory predicts that these ecological factors will select for an optimal offspring size, and therefore that variation in a given environment will be minimized. Yet recent evidence suggests maternal traits such as size or age could also drive mea...
متن کاملSperm Swimming Velocity Predicts Competitive Fertilization Success in the Green Swordtail Xiphophorus helleri
Sperm competition is expected to favour the evolution of traits that influence the performance of sperm when they compete to fertilize a female's eggs. While there is considerable evidence that selection favours increases in sperm numbers, much less is known about how sperm quality contributes towards competitive fertilization success. Here, we determine whether variation in sperm quality influ...
متن کاملThe Generation of Live Offspring from Vitrified Oocytes
Oocyte cryopreservation is extremely beneficial for assisted reproductive technologies, the treatment of infertility and biotechnology and offers a viable alternative to embryo freezing and ovarian grafting approaches for the generation of embryonic stem cells and live offspring. It also offers the potential to store oocytes to rescue endangered species by somatic cell nuclear transfer and for ...
متن کاملOutcome of dyadic conflict in male green swordtail fish, Xiphophorus helleri:
Abstract. The relative contribution of prior experience and of size asymmetries to the determination of dyadic dominance between unfamiliar individuals was examined using pairs of green swordtail fish, Xiphophorus helleri. Three experiments were conducted to assess the extent to which superiority in size could override potential handicaps resulting from prior experience. These results indicated...
متن کاملDistinguishing kinds of prior dominance and subordination experiences in males of green swordtail fish (Xiphophorus helleri).
In experiments, there are usually two general ways of obtaining dominants and subordinates to test for the effect of recent experience upon ulterior behavior and dominance. One is to 'impose' such an experience on the contestants by a priori deciding which individual of the pair will become the dominant and which will become the subordinate through the use of rigged contests. The second techniq...
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ژورنال
عنوان ژورنال: Zebrafish
سال: 2011
ISSN: 1545-8547,1557-8542
DOI: 10.1089/zeb.2011.0704