Rapid identification of capybara (Hydrochaeris hydrochaeris) using allele-specific PCR

Henrique-Silva, Flávio; Cervini, Marcelo; Wm, Rios; Lusa, Ana Letícia Gori; Lopes, Alessandro Garcia; D, Gonçalves; Fonseca, Daniel Gonçalves da; Franzin, Fernanda Maria; Damalio, Julio Cesar Pissuti; Scaramuzzi, K; Camilo, Rodrigo Yamakami; Ferrarezi, T; Liberato, M.V.; Mortari, Norma; Matheucci, Euclides

doi:10.1590/s1519-69842007000100027

Cited by 2 publications

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“…In comparison with animals from the Myomorpha suborder, rodent species belonging to the Hystricomorpha suborder have a greater body weight (Table 6). Capybaras and pacas, in particular, are the largest rodents alive (Henrique‐Silva et al, 2007; Orsi et al, 2009). However, except for chinchillas, the ratio between testis mass and body weight (GSI) for this suborder is very low (Table 6), and these 3 rodent species have a monogamous mating system, have longer life spans, produce few litters per year (generally 1–2), and have a spatulate sperm head shape (Eisenberg, 1981; Eddy and O'Brien, 1994).…”

Section: Discussionmentioning

confidence: 99%

Duration of Spermatogenesis and Spermatogenic Efficiency in 2 Large Neotropical Rodent Species: The Agouti (Dasyprocta leporina) and Paca (Agouti paca)

Costa

Leal

Ferreira

et al. 2010

Journal of Andrology

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The agouti (Dasyprocta leporina) and paca (Agouti paca) are among the largest extant rodent species. Although these species have considerable economic potential, there are few reports in the literature concerning male reproductive biology in sexually mature agoutis and pacas. The objectives of the present study were to perform detailed stereologic and histologic analyses of the testis and estimate spermatogenic cycle length in these 2 Neotropical rodent species as well as to compare the data with those from other well-studied rodent members of the Hystricomorpha and Myomorpha suborders. Eight adult agoutis and 6 adult pacas were used. The spermatogenic cycle in agoutis and pacas lasted 9.5 6 0.03 and 11.5 6 0.16 days, respectively, whereas the total duration of spermatogenesis for these 2 species was 42.8 6 0.16 and 51.6 6 0.7 days, respectively. Most of the parameters investigated were similar to those obtained for the other members of the Hystricomorpha suborder. As a result of the combination of high values of seminiferous tubule volume density, number of Sertoli cells per gram of testis, Sertoli cell efficiency, and a relatively short duration of spermatogenesis, the spermatogenic efficiency found in agoutis (52 6 2 6 10 6 ) and pacas (39 6 2 6 10 6 ) was particularly high when compared with that of previously investigated mammalian species. The data presented in this investigation would be useful for studies related to animal production as well as improvement and conservation programs involving these 2 large Neotropical rodent species.

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Section: Discussionmentioning

confidence: 99%