Spermiogenesis and spermiation in a marsupial, the tammar wallaby (Macropus eugenii)
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چکیده
منابع مشابه
The first comprehensive genetic linkage map of a marsupial: the tammar wallaby (Macropus eugenii).
The production of a marsupial genetic linkage map is perhaps one of the most important objectives in marsupial research. This study used a total of 353 informative meioses and 64 genetic markers to construct a framework genetic linkage map for the tammar wallaby (Macropus eugenii). Nearly all markers (93.8%) formed a significant linkage (LOD > 3.0) with at least one other marker, indicating tha...
متن کاملSpectral sensitivity of photoreceptors in an Australian marsupial, the tammar wallaby (Macropus eugenii)
Microspectrophotometric measurements on the rod photoreceptors of the tammar wallaby showed that they have a peak absorbance at 501 nm. This indicates that macropod marsupials have a typical mammalian rhodopsin. An electroretinogram-based study of the photoreceptors confirmed this measurement and provided clear evidence for a single middle wavelength-sensitive cone pigment with a peak sensitivi...
متن کاملProposal to Sequence the Genome of the Model Marsupial Macropus Eugenii (tammar Wallaby)
Marsupials were regarded as curiosities by their early European discoverers, animals to be wondered at. Nevertheless, it was recognised very early that they could make a major contribution to our understanding of reproductive processes, and indeed marsupial research led the field of reproduction during the first half of the 20 century. Marsupials are mammals, but represent a 100+ million year i...
متن کاملDigestive plasticity of the small intestine and the fermentative hindgut in a marsupial herbivore, the tammar wallaby (Macropus eugenii)
We investigated the effects of a ground, pelleted diet versus natural forage on the gross morphology of the gastrointestinal tract of a mediumsized (5 7 kg body mass) macropodid marsupial, the tammar wallaby ( Macropus eugenii). The empty wet mass ( g) of the small intestine of tammar wallabies maintained on a pelleted diet for 6 weeks was 22% greater than that of animals maintained on natural ...
متن کاملThe cone visual pigments of an Australian marsupial, the tammar wallaby (Macropus eugenii): sequence, spectral tuning, and evolution.
Studies on marsupial color vision have been limited to very few species. There is evidence from behavioral, electroretinographic (ERG), and microspectrophotometric (MSP) measurements for the existence of both dichromatic and trichromatic color vision. No studies have yet investigated the molecular mechanisms of spectral tuning in the visual pigments of marsupials. Our study is the first to dete...
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ژورنال
عنوان ژورنال: Journal of Anatomy
سال: 1997
ISSN: 0021-8782,1469-7580
DOI: 10.1046/j.1469-7580.1997.19030377.x