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Sexual differentation

Chinchillas are quite easy to sex and this can be done al birth.

Male - as with many rodent species, the anogenital distance is longer in the male than it is in the female (Fig.

14.71. The penis can be extruded by gentle pressure at its base.

I he domestic ferret. Mustelapiiloriusfuro. is a member of the order Carnivora and the family Mustelidae.

Or

Other related species include badgers, otters, stoats and weasels, all of which are long bodied agile crea­tures capable of prbgcolor=white>Polyoestrous Polyoestrous Polyoestrous Length of oestrous cycle Every 4 days 30—35 days 14 days 4-6 days 15-16 days Every 4 days 4-5 days 4-5 days Type of ovulation Induced: occurs within IO hours of mating Spontaneous Spontaneous Spontaneous Spontaneous Spontaneous Spontaneous Sponuneous Gestation period 28-32 days 111 days 28 -32 days 24-26 days 63 days 15-18 days 19-21 days 20-22 days Average litter s⅛e 2-7 2-3 3 6 3-7 6-12 6-12 Type of young at birth Althcial Precocial Althcial Altricial Precocial Althcial Althcial Althcial Weaning age 4-6 weeks 6-8 weeks 6-7 weeks 3-4 weeks 3-4 weeks 3—4 weeks 18 days 3 weeks Age of sexual matuπty 5-8 months 8 months 12 months 10-12 weeks 6-10 weeks 6-10 weeks 3-4 weeks 5 6 weeks

I

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Source: Aspinall V., Capello M.. Introduction to Veterinary Anatomy and Physiology. Elsevier - Health Sciences Division,2004. — 252 p.. 2004
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