Age determination of Cape porcupines,Hystrix africaeaustralis
نویسندگان
چکیده
منابع مشابه
Reproduction in the Cape porcupine Hystrix africaeaustralis: an ecological perspective
Cape porcupines, Hystrix africaeaustralis, apparently have a wide ecological tolerance and are found extensive ly throughout Southern Africa. These fossorial hystrico morph rodents are monogamous, live in extended family groups, breed seasonally in summer rainfall areas, and adult pairs produce only a single litter each year. A litter interval ofabout one year is maintained through lactationa...
متن کاملUrinary characteristics of the Cape porcupine Hystrix africaeaustralis: effects of photoperiod and temperature.
The Cape porcupine Hystrix africaeaustralis is a large (11-18 kg), nocturnal, burrowing and group-living rodent. It experiences a metabolic response to seasonal acclimatization and is a hind gut fermenter. Changes in the urinary electrolyte and free urinary catecholamine concentrations of Cape porcupines were related to combined changes of ambient temperature and photoperiod regime. Three group...
متن کاملFunctional anatomy of the ovaries of pregnant and lactating Cape porcupines, Hystrix africaeaustralis.
The constituent cell types of the ovary of the porcupine were similar to those of New World hystricomorph rodents and accessory corpora lutea and luteal bodies were formed through the luteinization of the membrana granulosa or theca interna of antral follicles. All luteal bodies were histologically similar. The total volume of luteal tissue per female was not affected by fetal age and was unrel...
متن کاملSexual behavior of the female porcupine Hystrix africaeaustralis.
Porcupines are sexually active throughout the estrous cycle, and sexual behavior is not affected by the reproductive status and hormonal milieu of females. Increased female-male interactions during estrus are the only indications of behavioral changes during estrus. The lack of aggression shown by females to known males as opposed to aggression shown to strange males, the greater interest shown...
متن کاملSonographic Determination of Gestational Age
Appropriate assessment of gestational age is paramount in obstetric care. Making appropriate management decisions requires accurate appraisal of gestational age. Accurate pregnancy dating may assist obstetricians in appropriately counseling women who are at risk of a preterm delivery about likely neonatal outcomes and is also essential in the evaluation of fetal growth and the detection of intr...
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ژورنال
عنوان ژورنال: South African Journal of Zoology
سال: 1985
ISSN: 0254-1858
DOI: 10.1080/02541858.1985.11447940