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Merriam's kangaroo rats live individually within a maze of burrows. Males and females each establish individual territories. They defend their territories against other male and female merriami, primarily to protect often scarce food resources. It is typical that they locate multiple entrances to their burrow complex at the base of shrubs near ...
A Merriam's kangaroo rat female will allow multiple males to mount her in a short time, perhaps to ensure greater chances of producing offspring. Mating in banner-tailed kangaroo rats involves more chasing and foot drumming in the male before the female allows him to mate. [19] Banner-tailed kangaroo rats mate on mounds and the more successful ...
One difference between the glans penis and the glans clitoridis is that the glans clitoridis packs nerve endings into a volume only about one-tenth the size of the glans penis. Therefore, the glans clitoridis has greater variability in cutaneous corpuscular receptor density (1-14 per 100× high-powered field) compared with the glans penis (1-3 ...
Various aged naked mole-rats. The naked mole-rat (Heterocephalus glaber), also known as the sand puppy, [6] is a burrowing rodent native to the Horn of Africa and parts of Kenya, notably in Somali regions [1]. It is closely related to the blesmols and is the only species in the genus Heterocephalus. [7]
Rats such as the bandicoot rat (Bandicota bengalensis) are murine rodents related to true rats but are not members of the genus Rattus. [4] [5] Male rats are called bucks; unmated females, does, pregnant or parent females, dams; and infants, kittens or pups. A group of rats is referred to as a mischief. [6]
Likewise, male cephalopods have only a single testicle. In the female of most cephalopods the nidamental glands aid in development of the egg. The "penis" in most unshelled male cephalopods is a long and muscular end of the gonoduct used to transfer spermatophores to a modified arm called a hectocotylus. That in turn is used to transfer the ...
The Indian gerbil (Tatera indica) also known as antelope rat, is a species of rodent in the family Muridae. It is found in western and southern Asia, from Syria east through to Bangladesh. [2] It is the only species in the genus Tatera. Members of the genus Gerbilliscus have, historically, been placed in Tatera.
Bcl-2 is an antiapoptotic protein. The level of Bcl-2 in PD8 male rats is much higher than that in female rats of the same age, hence the number of apoptotic cells of MPNc in PD8 male rats is much lower than PD8 female rats. On the other hand, Bax, a proapoptotic protein, shows lower level in PD8 males than in PD8 females.