منابع مشابه
Play in fishes, frogs and reptiles
What animals engage in play? Not too many years ago play was considered by most scholars and scientists as something we see in rather intelligent warm-blooded animals, such as monkeys and apes, dogs, cats, elephants, otters, bears, and some birds, such as crows and parrots. Of course, horses play, especially young ones: the origins of the phrase ‘horsing around’ are not hard to fathom. In fact,...
متن کاملTumors of fishes, amphibians, and reptiles.
s of other reported cases of papilloma SCHROEDERS, 1908: In several species of gudgeon Gobio the author observed "fibro-epitheliomata." In some fish the tumors were solitary, in others multiple. In all instances they were ,sharply circumscribed, papillomatous, and yellow-white in color. JOHNSTONE, 1912 : An irregular cauliflower-like growth was observed on the snout of a halibut Hippoglossus hi...
متن کاملY Fuse? Sex Chromosome Fusions in Fishes and Reptiles
Chromosomal fusion plays a recurring role in the evolution of adaptations and reproductive isolation among species, yet little is known of the evolutionary drivers of chromosomal fusions. Because sex chromosomes (X and Y in male heterogametic systems, Z and W in female heterogametic systems) differ in their selective, mutational, and demographic environments, those differences provide a unique ...
متن کاملUltrasound Detection in Fishes and Frogs: Discovery and Mechanisms
The frequency range of hearing in fishes and frogs historically has been thought to be confined to relatively low frequencies in comparison to mammals (Hawkins, 1981; Fay, 1988). The fishes with the greatest sensitivity and frequency bandwidth, such as the otophysans, a group of species that have a mechanical coupling between the swim bladder and inner ear, have upper frequency sensitivities be...
متن کاملSup. Mat.: Y fuse? Patterns of sex chromosome fusions in fishes and reptiles
Consider fusions that originate at rate mC in sex (sex = m or f) and involving chromosome C (C = X, Y, Z, or W). We assume that there is no recombination between the sex determining region (SDR) and the fusion; that is, an X-A fusion is assumed to remain X-A and not recombine to create a fused Y-A chromosome. [Such recombination events would lead to expanded chromosome regions on both sex chrom...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2015
ISSN: 0960-9822
DOI: 10.1016/j.cub.2014.10.027