Fecal progestins during pregnancy and postpartum periods of captive red brocket deer (Mazama americana)

Krepschi, Victor Gasperotto; Polegato, Bruna Furlan; Zanetti, Eveline S.; Duarte, José Maurício Barbanti

doi:10.1016/j.anireprosci.2012.11.016

Cited by 20 publications

(10 citation statements)

References 33 publications

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“…A method that is commonly used to evaluate the ovaries of wild animals is the measurement of fecal progesterone metabolite levels (FPM) [37-39]. In the case of Neotropical deer, particularly M. gouazoubira , the characteristics of reproductive events have been studied using this method of monitoring the endocrine system [40-43]. …”

Section: Introductionmentioning

confidence: 99%

The role of chromosome variation in the speciation of the red brocket deer complex: the study of reproductive isolation in females

Cursino

Salviano²,

Abril

et al. 2014

BMC Evol Biol

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BackgroundThe red brocket deer, Mazama americana, has at least six distinct karyotypes in different regions of South America that suggest the existence of various species that are today all referred to as M. americana. From an evolutionary perspective, the red brockets are a relatively recent clade that has gone through intense diversification. This study sought to prove the existence of post-zygotic reproductive isolation in deer offspring between distinct chromosome lineages. To achieve this, inter-cytotype and intra-cytotype crosses were performed, which resulted in both F1 hybrid (n = 5) and pure offspring (n = 3) in captivity.ResultsF1 females were analyzed in terms of their karyotypes, ovarian histology, estrous cycles and in vitro embryo production. Pure females presented parameters that were similar to those previously reported for M. Americana; however, the parameters for hybrid females were different. Two hybrids were determined to be sterile, while the remaining hybrids presented characteristics of subfertility.ConclusionsThe results support the existence of well-established reproductive isolation among the most distant karyotype lineages and elucidates the need to define all karyotype variants and their geographical ranges in order to define the number of species of red brocket.

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Section: Introductionmentioning

confidence: 99%

The role of chromosome variation in the speciation of the red brocket deer complex: the study of reproductive isolation in females

Cursino

Salviano²,

Abril

et al. 2014

BMC Evol Biol

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“…Estrus in the female M. nemorivaga was confirmed through the manifestation of behaviors and signs, including diminished reactivity to the examiner's presence, positive stop reflex (Krepschi et al 2013), and translucent mucus secretion from the vagina. The lordosis response to handlers has been documented for red deer, Pere David's deer, Eld's deer, reindeer (reviewed by Morrow et al 2009), red brocket deer (Krepschi et al 2013), and brown brocket deer (Zanetti et al 2010).…”

Section: Resultsmentioning

confidence: 99%

First live offspring of Amazonian brown brocket deer (Mazama nemorivaga) born by artificial insemination

et al. 2016

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The Amazonian brown brocket deer (Mazama nemorivaga) is an endemic species of the Amazon rainforest region, which has suffered constant threats due to hunting and increasing deforestation. Artificial insemination (AI), combined with genomic banks, is considered an important tool for maintaining conservation programs of endangered species; however, the number of live offspring born from AI in nondomesticated cervids is extremely low. Thus, studies designed to develop, adapt, or enhance AI techniques are of fundamental importance. This report describes a successful transposition of the cervix with semen deposition in the uterine lumen of a M. nemorivaga female, based on the transcervical AI technique used in sheep, as well as using specific tools develop for IA in small ruminants, which have resulted in the birth of a healthy male fawn.

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“…Los resultados obtenidos pueden deberse a varios factores, uno de ellos son las variaciones individuales en la excreción y metabolización de progesterona, las cuales pueden influir en los perfiles hormonales [14]; este hecho debe ser tomado en cuenta con cuidado, ya que se encontró gran variación en los resultados analizados de manera individual; si este hecho se debiera a las variaciones individuales, estas serían demasiado grandes para considerar que las progestinas fecales reflejan de manera indirecta la actividad lútea; sin embargo, estos metabolitos han sido considerados buenos indicadores de la actividad ovárica en felinos, primates, ungulados y especialmente en Mazama americana [15] y M. gouazoubira [16] y otras especies, tanto domésticas como de zoológico [14]. Brousset et al [17] reportan que las variables que afectan la concentración hormonal contenida en los excrementos son: constipación, diarrea, restricción de alimentos, cantidad de fibra en la dieta, tratamientos con antibióticos que afecten la microbiota intestinal y las características metabólicas de cada individuo, lo cual también ha sido reportado por Palme et al [18].…”

Section: Resultados Y Discusiónunclassified

Método no invasivo de diagnóstico de gestación en venadas Odocoileus virginianus. (Non-Invasive Method for Pregnancy Diagnosis in Odocoileus Virginianus.)

et al. 2015

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ResumenObjetivo: Valorar la eficiencia del diagnóstico de gestación mediante la estimación de niveles de progestinas fecales en venadas cola blanca O. virginianus en la época no reproductiva. Materiales y métodos: Se analizaron muestras sanguíneas y heces de nueve venadas cola blanca (VCB), semanalmente, durante dos meses en la época reproductiva. Adicionalmente, las VCB fueron expuestas a macho durante un mes durante la época reproductiva, y se colectaron heces dos veces fuera de esta, para medir los niveles de metabolitos de progestinas. Se determinó el valor de corte para diagnosticar gestación a partir de los niveles de metabolitos de progestinas fecales en fase luteal y folicular. La progesterona sanguínea fue medida por radioinmunoanálisis, y se correlacionó con los niveles de progestinas fecales. Los diagnósticos de gestación fueron relacionados con los partos. Resultados: La correlación total entre niveles de progestinas sanguíneas y metabolitos de progestinas fecales fue 0,37 (p<0,01). La variación de la correlación individual fue 0,104 hasta 0,99. El valor de corte para diagnosticar gestación fue 4000 ng/g en heces. La eficiencia del diagnóstico de gestación fue 77,78 %; el valor predictivo del diagnóstico positivo fue 75 %, y el negativo fue 80 %, respectivamente. Conclusiones: Es posible diagnosticar gestación fuera de la época de reproducción mediante la estimación de los niveles de metabolitos de progestinas fecales, en VCB en cautiverio, tomando como valor de corte 4000 ng/g de heces.

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Fecal progestins during pregnancy and postpartum periods of captive red brocket deer (Mazama americana)

Cited by 20 publications

References 33 publications

The role of chromosome variation in the speciation of the red brocket deer complex: the study of reproductive isolation in females

The role of chromosome variation in the speciation of the red brocket deer complex: the study of reproductive isolation in females

First live offspring of Amazonian brown brocket deer (Mazama nemorivaga) born by artificial insemination

Método no invasivo de diagnóstico de gestación en venadas Odocoileus virginianus. (Non-Invasive Method for Pregnancy Diagnosis in Odocoileus Virginianus.)

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