Can jaguar (Panthera onca) ovulate without copulation?

Jorge‐Neto, Pedro Nacib; Luczinski, Thiago Cavalheri; Araújo, Gediendson Ribeiro de; Júnior, Jorge Aparecido Salomão; Traldi, A; Santos, Jairo Antonio Melo dos; Requena, Letícia Alecho; Gianni, Maria Cristina Machado; Deco‐Souza, Thyara de; Pizzutto, Cristiane Schilbach; Baldassarre, Hernán

doi:10.1016/j.theriogenology.2020.02.026

Cited by 15 publications

(7 citation statements)

References 18 publications

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“…In the present case, there were no reports of external hormonal administration, and while some unknown individual factors may have played a role in the carcinogenesis, the presence of the male enclosure near the female enclosure may have favoured a higher endogenous hormonal exposure, considering the felid female reproductive physiology, which allows ovulation even without copulation in this species 11 . This is unlike what is normally expected in domestic cats, 12,13 although ovulation not preceded by coitus may also occur in the latter 14,15 …”

Section: Discussionmentioning

confidence: 54%

Metastatic mammary tubulopapillary carcinoma in a captive black jaguar (Panthera onca)

Lopes

Reis

Lacerda

et al. 2022

Vet Record Case Reports

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A 12-year-old female captive jaguar (Panthera onca) developed sudden severe respiratory distress and died close to the onset of clinical signs. The animal underwent mastectomy to remove neoplasms in the mammary glands 2 years prior to death. During the post-mortem examination, multiple nodules were found in the remaining left inguinal mammary glands. Similar lesions were found in other organs. Microscopically, neoplasms were characterised by a tubulopapillary pattern with papillary projections into the central lumen of newly formed tubules (tubulopapillary mammary carcinoma). Immunohistochemistry (IHC) for oestrogen receptor, progesterone receptor and high molecular weight cytokeratin on the mammary tissue site and a metastatic site was performed with positive results. IHC for Ki-67 was performed in the mammary lesion with positive labelling in 50% of the cells. In captive felids, malignant neoplasms may be aggressive with limited therapeutic options. Thus, attention is needed in anticipating arising tumours to support the use of control therapies and the long-term preservation of captive jaguars.

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Section: Discussionmentioning

confidence: 54%

Metastatic mammary tubulopapillary carcinoma in a captive black jaguar (Panthera onca)

Lopes

Reis

Lacerda

et al. 2022

Vet Record Case Reports

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“…It, however, remains unclear why behavioral estrus was observed in two of the lionesses without a rise in fecal estrogen and J TT progesterone metabolites concentration. Ovulation in Panthera genus species is triggered by copulation or sensorial stimulation (Jorge-Neto et al 2020). Therefore, the lack of ovulation observed during this study may demonstrate a estrus detection failure or a compromised ovarian function.…”

Section: J Tt Discussionmentioning

confidence: 73%

Suppression of ovarian activity in a captive African Lion Panthera leo after deslorelin treatment

et al. 2020

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With the intent to evaluate the efficiency of a contraceptive treatment for cyclic ovarian suppression in African Lionesses Panthera leo using a Gonadotrophin-Releasing Hormone (GnRH) agonist bioimplant, noninvasive fecal steroid assay associated with the observation of the behavioral estrus were employed for a period of 36 months. Five captive adult females, maintained with a vasectomized male, subcutaneously received a 9.4mg deslorelin acetate implant. The treatment initially stimulated behavioral estrus along with ovarian activity, demonstrated by an estrogen increase in two lionesses. A rise in progesterone concentration in two other animals suggested possible treatment-induced ovulation. After the initial period, deslorelin prevented ovarian activity for at least 22 months. Two females exhibited signs of behavioral estrus after 22 and 31 months. A third lioness with an increased estrogen concentration did not exhibit behavioral estrus signs or a consequent progesterone surge until 33 months after implantation, suggesting a possible resumption of ovarian activity. One female did not exhibit any behavioral estrus signs nor a rise in steroid levels after the “treatment-induced” estrus throughout the entire experiment (36 months). One lioness died after 15 months without exhibiting signs of estrus or an increased progesterone level, however, the estrogen concentration increased 12 months post-implantation, suggesting resumed ovarian activity. The study showed that long-term treatment with a GnRH agonist can be extremely effective as a contraceptive treatment in African lionesses, however, the duration of contraception may vary among individuals and may bear the risk of permanent loss of normal ovarian activity.

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“… Araújo et al (2021a) report observing the lack or scarcity of penile spines in adult jaguars in both ex situ and in situ environments, despite the production of high-quality semen. Consequently, the absence or scarcity of penile spines does not render reproduction unfeasible, especially given that ovulation in the jaguar can be induced by sensory stimuli ( Jorge-Neto et al, 2020b ) and by the multiple copulations during the female estrus period ( Jorge-Neto et al, 2018 ). Photographs of the penile spines of Panthera species have rarely been published.…”

Section: Discussionmentioning

confidence: 99%

Cryopreservation of jaguar (Panthera onca) sperm cells using different cryoprotectants and different thawing temperatures

et al. 2023

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The cryopreservation of jaguar semen must be improved to produce high-quality biobanking doses. Until now, the rare studies of semen freezing in the species have only evaluated glycerol, always with a significant reduction in sperm quality in thawed semen. The purpose of this study was to assess the efficacy of three cryoprotectants, dimethylsulfoxide (DMSO), glycerol (GLY), and methanol (MET), in the cryopreservation of jaguar semen in an LDL-based extender, as well as the effect of thawing temperature on dosage quality. Five mature males with a history of reproduction were used. On the males, an infrared thermal image (IRT) was captured, the spicules and testes were analyzed, and the CASA system was used to evaluate the quality of fresh and thawed sperm. The superficial IRT was 4.6 ± 1.2 °C cooler than the anal sphincter, and the semen measured between 27.3 and 28.7 °C shortly after exiting the urethra. The total motility of fresh sperm was 55.3 ± 22.6%, and progressive motility was 36.3 ± 18%. The total motility of thawed sperm was 5.28 ± 2.51%, 4.49 ± %2.49, and 0.51 ± 0.62% for DMSO, GLY, and MET, respectively. DMSO and GLY performed better than MET, and there was no difference in thawing temperature (37°C 30 s vs. 50°C 12 s). All animals exhibit a considerable level of morphological changes in sperm. Low amounts of total and progressive motility were found in the thawed sperm. Males with a high level of sperm morphological changes were found to be fertile, but the lone male with normospermia was infertile. Thus, we contest the applicability of the commonly used morphological classification for bovines to felid species.

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Can jaguar (Panthera onca) ovulate without copulation?

Cited by 15 publications

References 18 publications

Metastatic mammary tubulopapillary carcinoma in a captive black jaguar (Panthera onca)

Metastatic mammary tubulopapillary carcinoma in a captive black jaguar (Panthera onca)

Suppression of ovarian activity in a captive African Lion Panthera leo after deslorelin treatment

Cryopreservation of jaguar (Panthera onca) sperm cells using different cryoprotectants and different thawing temperatures

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