Comparative study of immunohistochemical methods to diagnose mycobacteriosis in swordtail Xiphophorus helleri
نویسندگان
چکیده
منابع مشابه
Sperm 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 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...
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 کاملMerging social hierarchies: Effects on dominance rank in male green swordtail fish (Xiphophorus helleri).
When the same set of individuals are placed in different social contexts, some groups members often experience a change in dominance status. We examined the context-dependence of social status using a group fusion protocol in male green swordtail fish (Xiphophorus helleri). Six individuals were matched for size and separated into two groups of three fish. Each triad established a stable hierarc...
متن کاملFemale preference for dynamic traits in the green swordtail, Xiphophorus helleri
Analyses of the relationship between female preference and male behaviour have been complicated by correlated variation in factors such as male size and appearance. This study examined the effects of systematically manipulating male behaviour, while holding male morphology constant. Female green swordtails were shown video-recorded sequences of the same male engaging in an active courtship disp...
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ژورنال
عنوان ژورنال: Diseases of Aquatic Organisms
سال: 1996
ISSN: 0177-5103,1616-1580
DOI: 10.3354/dao024117