The aim of this study was to evaluate the phases of sexual development and spermatogenesis of Spix's yellow-toothed cavy Galea spixii based on analyses of the structural components of the testes. The testes of animals from 0 to days of age were collected by orchiectomy, weighed, and processed for analysis by light microscopy. At 45 days of age, spermatozoa were seen in the tubular lumen. Spermatogenesis was not established in animals from 45 to days of age. The stages of sexual development may be classified into the following phases: from birth to the age of 15 days immature ; 30 days of age prepubertal ; days of age pubertal ; and and days of age postpubertal.
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Additional Information Encyclopedia of Life. Galea spixii Spix's yellow-toothed cavy Facebook. Kingdom Animalia animals. Animalia: information 1 Animalia: pictures Animalia: specimens Animalia: sounds Animalia: maps Eumetazoa metazoans. Eumetazoa: pictures Eumetazoa: specimens Eumetazoa: sounds Eumetazoa: maps Bilateria bilaterally symmetrical animals.
Bilateria: pictures Bilateria: specimens Bilateria: sounds Bilateria: maps Deuterostomia deuterostomes. Deuterostomia: pictures Deuterostomia: specimens Deuterostomia: sounds Phylum Chordata chordates. Chordata: information 1 Chordata: pictures Chordata: specimens Chordata: sounds Craniata craniates. Craniata: pictures Craniata: specimens Craniata: sounds Subphylum Vertebrata vertebrates. Vertebrata: information 1 Vertebrata: pictures Vertebrata: specimens Vertebrata: sounds Superclass Gnathostomata jawed vertebrates.
Gnathostomata: pictures Gnathostomata: specimens Gnathostomata: sounds Euteleostomi bony vertebrates. Euteleostomi: pictures Euteleostomi: specimens Euteleostomi: sounds Class Sarcopterygii lobe-finned fishes and terrestrial vertebrates. Sarcopterygii: pictures Sarcopterygii: specimens Sarcopterygii: sounds Tetrapoda tetrapods. Tetrapoda: pictures Tetrapoda: specimens Tetrapoda: sounds Amniota amniotes. Amniota: pictures Amniota: specimens Amniota: sounds Synapsida synapsids.
Synapsida: pictures Synapsida: specimens Synapsida: sounds Class Mammalia mammals. Mammalia: information 1 Mammalia: pictures Mammalia: specimens Mammalia: sounds Subclass Theria Therian mammals. Theria: pictures Theria: specimens Theria: sounds Infraclass Eutheria placental mammals.
Eutheria: pictures Eutheria: specimens Eutheria: sounds Order Rodentia rodents. Rodentia: information 1 Rodentia: pictures Rodentia: specimens Rodentia: sounds 2. Suborder Hystricomorpha hystricognath rodents. Hystricomorpha: pictures Hystricomorpha: specimens Hystricomorpha: sounds 1. Infraorder Hystricognathi hystricognath rodents.
Hystricognathi: pictures Hystricognathi: specimens Hystricognathi: sounds 1. Family Caviidae cavies. Caviidae: information 1 Caviidae: pictures 36 Caviidae: specimens Subfamily Caviinae cavies. Caviinae: pictures 10 Caviinae: specimens 7. Genus Galea yellow-toothed cavies. Galea: pictures 1. Species Galea spixii Spix's yellow-toothed cavy.
Read more Connect with us Help us improve the site by taking our survey. Facebook Twitter Pinterest. Classification Kingdom Animalia animals Animalia: information 1 Animalia: pictures Animalia: specimens Animalia: sounds Animalia: maps The ADW Team gratefully acknowledges their support.
Development of Spermatogenesis in Captive-Bred Spix's Yellow-Toothed Cavy (Galea Spixii)
Spix's yellow-toothed cavy Galea spixii is a rodent , a cavy species from South America. Galea spixii and G. It is the most stable species within the Galea group because it is extremely abundant throughout its range. Gestation is about fifty days. Litters size ranges from one to five, with an average of three. They have hair and open eyes at birth.
The aim of this work was to investigate the thermal biology of the Spix's yellow-toothed cavy Galea spixii from the hot and dry environment of the Brazilian Caatinga by infrared thermography and biophysical equations. We monitored the rectal temperature, as well as the non-evaporative radiative and convective pathways and evaporative heat exchanges of males and females. The mean rectal temperature of females and males was We identified thermal windows by infrared thermography.