Seasonal variation in serum testosterone, testicular volume, and semen characteristics in the coyote (Canis latrans).

Seasonal variation in seminal characteristics, testicular measurements and plasma testosterone concentration in Iranian Khalkhali bucks

The aim of the present study was to determine seasonal variations in semen characteristics, testicular size, and plasma testosterone concentration in Iranian Khalkhali goats. An artificial vagina was used to collect semen from 10 bucks (2–4 years of age), from November 2013 to October 2014. Testicular circumference was higher (P<0.05) from September to October. Ejaculate volume, sperm ...

Semen characteristics sexual behavior and variation of serum testosterone concentrations in caspian ponies

Seasonal variation in the characteristics of the Azarbaijani buffalo (Bubalus bubalis) semen

To study the seasonal variation in the characteristics of the Azarbaijani buffalo semen, three 2-4-year-oldbulls of Azarbaijani water buffaloes, kept in the Buffalo Breeding Center, in Urmia, northwest of Iran, wereselected. Semen samples were collected once a week for a period of one year using artificial vagina and abuffalo cow as a dummy. Semen volume, colour, pH and motility and spermatozoa...

Taxonomic Implications of Morphological and Genetic Differences in Northeastern Coyotes (Coywolves) (Canis latrans × C. lycaon), Western Coyotes (C. latrans), and Eastern Wolves (C. lycaon or C. lupus lycaon)

common in nature, having been documented in amphibians, insects, fish, birds, and especially within closely related plant species (Berger 1973; arnold 1992; Fritz et al. 1994; haddad et al. 1994; Parris et al. 1999; arnold et al. 1999; albert et al. 2006; Schierenbeck and Ellstrand 2009; Meyerson et al. 2010). allendorf et al. (2001) noted that hybridization is more common in fish than in other...

Influence of exogenous gonadotropin-releasing hormone on seasonal reproductive behavior of the coyote (Canis latrans).

Wild Canis species such as the coyote (C. latrans) express a suite of reproductive traits unusual among mammals, including perennial pair-bonds and paternal care of the young. Coyotes also are monestrous, and both sexes are fertile only in winter; thus, they depend upon social and physiologic synchrony for successful reproduction. To investigate the mutability of seasonal reproduction in coyote...