The use of altrenogest to avoid hyperestrogenism after eCG-hCG ovulation induction in southern tigrina (Leopardus guttulus)

Micheletti, Tatiane; Brown, Janine L.; Walker, Susan L.; Cubas, Zalmir Silvino; Furtado, Priscila Viau; Putman, Sarah; Moraes, Wanderlei de; Oliveira, Marcos José de; Oliveira, Cláudio Alvarenga de; Moreira, Nei

doi:10.1016/j.theriogenology.2015.04.015

Cited by 8 publications

(5 citation statements)

References 25 publications

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“…Fecal extracts were analyzed using antibodies for progesterone (4‐pregnene‐11‐ol‐3,20‐dione‐3‐hemisuccinate:bovine serum albumin; CL425), estradiol (17ß‐estradiol‐3‐carboxymethyl oxime; R4972), testosterone (testosterone‐6‐carboxymethyl oxime; R156/7) and cortisol (cortisol‐3‐carboxymethyl oxime; R4866), all sourced from C. Munro, Clinical Endocrinology Lab, University of California, Davis, CA. Bateman et al () previously used the progesterone, estradiol, and testosterone antibodies for other otter species, and antibody cross‐reactivity was previously cited (progesterone, Graham, Schwarzenberger, Mostl, Galama, & Savage, ; estradiol, Micheletti et al, ; testosterone, Penfold et al, ; cortisol, Lupica & Turner, ).…”

Section: Methodsmentioning

confidence: 99%

Characterization of the behavior and reproductive endocrinology of giant river otters (Pteronura brasiliensis) in managed care

Metrione¹,

Bateman

Swanson

et al. 2018

Zoo Biology

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Propagation of giant river otters (GRO) in zoos is inconsistent: some pairs never reproduce while others are prolific in producing young but can be hindered by low cub survival. Developing effective breeding programs requires understanding normal reproductive parameters and behavior. Fecal samples were collected for 6-16 months from five breeding pairs, two individual females, and one female pair at seven zoos, and analyzed for fecal progesterone, estrogen, testosterone, and glucocorticoid (FGM) metabolites via enzyme immunoassay. Enclosure characteristics and management routines were recorded at six facilities where behavior was assessed over 1 week. Median fecal progestogens during pregnancy and pseudopregnancy were ∼2.5-3.8× greater than basal concentrations. Gestation lasted 66.5 ± 3.5 days (62-70 days); pseudopregnancies lasted 58 ± 11.6 days (41-69 days). Elevated progestogens indicate ovulation but cannot distinguish pregnancy from pseudopregnancy. Periodically sustained, elevated progestogens observed in two females housed without a male indicated spontaneous ovulation. Elevations in fecal estrogens were not associated with estrus, and seasonality in male testosterone was not observed. Wavering scream and contact call vocalizations among reproductively successful males and females, respectively, suggested the importance of social communication. Most facilities housing successful pairs had larger enclosures with more water than land area, vegetation, and limited public exposure. Baseline FGM were negatively correlated with enclosure size and percentage of water area (p < 0.05), and lower baseline FGM were associated with reproductive success (p < 0.05). These results suggest that housing GRO in spacious enclosures with open water and some insulation from disturbance might promote appropriate behavior, lower FGM, and reproduction.

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Section: Methodsmentioning

confidence: 99%

Characterization of the behavior and reproductive endocrinology of giant river otters (Pteronura brasiliensis) in managed care

Metrione¹,

Bateman

Swanson

et al. 2018

Zoo Biology

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“…This protocol was also effective in reducing hyperstimulation and hyperestrogenism after hCG and eCG administration. However, the authors affirmed that not all females responded uniformly [45]. In fact, studies with both conventional gonadotropins showed diversity of response in different feline species.…”

Section: Estrous and Ovulation Controlmentioning

confidence: 92%

“…For wild females exhibiting irregular or regular cycles of sexual activity, estrus synchronization support assisted breeding procedures particularly to maximize the chances of conception and the use of fresh or cryopreserved semen [44]. The administration of exogenous hormones, whether or not in association, can artificially synchronize the estrous and ovulation of wild females, altering its endogenous endocrine environment [45]. Research has dramatically increased the number of synchronization protocols for wild animals, being the prostaglandins, progestins, or gonadotropins the most available, each with specific functions and peculiar mechanism of action.…”

Section: Estrous and Ovulation Controlmentioning

confidence: 99%

Assisted Reproductive Techniques on South American Wild Mammals

Silva¹,

Pereira²,

Lima³

et al. 2016

Insights From Animal Reproduction

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For South American wild mammals, assisted reproductive techniques (ARTs) have been established in accordance with the procedures used for domestic mammals. However, often, it is not possible to infer the experimental conditions from one species to another. In general, the use of these ARTs aims the conservation of the animal genetic material, using gamete manipulation, embryo technology by in vivo or in vitro methods, and cloning. In all animals, the previous knowledge of reproductive physiology becomes the starting point for the use of ARTs in the expansion of all species of interest. In this sense, the purpose of this chapter is to develop an approach of theoretical, technical, and applied aspects of the ARTs in South American wild mammals, with emphasis on the state-of-theart and its progress and perspectives.

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“…Oestrus induction and ovulation. In wild females, estrus induction is an alternative that could help to increase the chances of gestation, even females could be artificially inseminated with fresh or frozen semen (Micheletti et al, 2015). This strategy requires the exogenous administration of hormones such as gonadotropin-releasing hormone (GnRh), LH, FSH or gonadotropins, alone or in combination, which modify the endocrine environment and induce ovulation.…”

Section: Assisted Reproduction Techniquesmentioning

confidence: 99%

Reproductive Aspects of Jaguar (Panthera Onca): Female

López-Pérez

Cortés-Villavicencio

Ávalos-Rodrı́guez

et al. 2021

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Objective: Describe the reproductive characteristics of the female jaguar as well as assisted reproduction techniques. Design/methodology/approach: A literature review about reproductive characteristics and assisted reproduction techniques was done to documented information about it. Results: The Jaguar is considered the largest feline in America, females are 1.57 to 2.19 m of length and weigh 45 to 82 kg. The jaguar female is ready for mating when it is about 2 years old. Regarding the estrous cycle, it is divided into: proestrus, estrus, diestrous, interestrous and anestrus. Environment influence on the reproductive behavior of the jaguar, being the steroids those that stimulate the production of pheromones to attract the male; in the female the secretion is cyclical. The gestation lasts approximately between 90 and 110 days and they usually give birth to 1 or up to 4 young. In the case of assisted reproduction, artificial insemination could be useful to preserve genetic material from animals with outstanding characteristics. Limitations on study/implications: The destruction of forests and jungles, the fragmentation of habitat, indiscriminate hunting, the lack of prey as a food source and the conflict with ranchers has put the Jaguar on the brink of extinction, in addition there is little information about its reproductive characteristics, which is why in Mexico, it is imperative to generate this information, mainly in free-living jaguar. Findings/conclusions: Reproductive characteristics of jaguar female were documented from a literature review as well as assisted reproduction techniques. Knowledge of these will allow developed reproductive strategies to work on a national conservation and reproduction strategy to preserve the species.

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The use of altrenogest to avoid hyperestrogenism after eCG-hCG ovulation induction in southern tigrina (Leopardus guttulus)

Cited by 8 publications

References 25 publications

Characterization of the behavior and reproductive endocrinology of giant river otters (Pteronura brasiliensis) in managed care

Characterization of the behavior and reproductive endocrinology of giant river otters (Pteronura brasiliensis) in managed care

Assisted Reproductive Techniques on South American Wild Mammals

Reproductive Aspects of Jaguar (Panthera Onca): Female

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