Reproductive Medicine in Lizards

Knotek, Z.; Eva, Carola; Oliveri, Matteo

doi:10.1016/j.cvex.2016.11.006

Cited by 25 publications

(11 citation statements)

References 10 publications

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“…Fluid therapy was given subcutaneously divided on both hind legs with a dose of 20 mL/kg for maintaining the body fluids (Knotek et al 2017). Clinically the V. salvator was still active and tongue was forking out normally.…”

Section: ■ Discussionmentioning

confidence: 99%

“…Noninvasive treatment and husbandry improvement was indicated in this case. Sexually maturity in captive animals could occur at early age due to the care and diet compared to age maturity for reproducing (Knotek et al 2017). Young varanid which achieve earlier sexual maturity usually produce bigger egg but in lesser quantity (Thompson & Pianka 2001).…”

Section: ■ Discussionmentioning

confidence: 99%

“…Treatment: Husbandry improvement of nesting box filled with sand placed in the enclosure. The monitor was given only supportive fluids of NaCl 0.9% with a dose of 20 mL/kg BW refer to Knotek et al (2017) subcutaneously on both the hind legs. Owner was advised to do close observation back at home with placing a nest box into the monitor's enclosure.…”

Section: ■ Casementioning

confidence: 99%

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Non-invasive and husbandry treatment in a singular post-ovulatory egg stasis on an Asian water monitor (Varanus salvator)

et al. 2020

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Asian water monitor (Varanus salvator) is among the largest species of monitor lizards kept in captivity due to the elegancy and character of the species. Captive breeding projects of monitor lizards are not common among reptile keepers. A two years old female V. salvator was presented with complains of anorexic and distended abdomen. No record of copulation or egg deposition was noticed from the particular specimen. Radiography confirmed a post-ovulatory egg-stasis (POES) occurring in the coelomic cavity. Fluid therapy and husbandry improvement was indicated as treatments. Oviposition of the POES was noticed 4 days after treatment. Young monitors could be prone to have less quantity of eggs but larger in size

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Section: ■ Discussionmentioning

confidence: 99%

Section: ■ Discussionmentioning

confidence: 99%

Section: ■ Casementioning

confidence: 99%

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Non-invasive and husbandry treatment in a singular post-ovulatory egg stasis on an Asian water monitor (Varanus salvator)

et al. 2020

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“…In avian species, DA implants are rarely employed, usually to medically reduce aggressivity or treat sex-related disorders such as excessive egg laying, with great variability in efficacy and duration [ 18 , 19 , 20 , 21 , 22 , 23 ]. In reptiles, GnRH agonists have been poorly investigated so far: in lizards, suppression of gonadic activity was reported only in iguanas [ 18 , 24 , 25 , 26 ]. Regarding chelonians, annual applications of DA implants reduced serum testosterone levels after the fourth treatment in a male Chelonia mydas [ 27 ]; DA was successfully used to treat chronic ovodeposition problems in a Testudo graeca up to 24 months after implantation [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Determination of Efficacy of Single and Double 4.7 mg Deslorelin Acetate Implant on the Reproductive Activity of Female Pond Sliders (Trachemys scripta)

Bardi

Manfredi

Capitelli³

et al. 2021

Animals

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The use of long-acting gonadotropin-releasing hormone (GnRH) agonists to suppress fertility has been poorly investigated in reptiles, and the few available studies show inconsistent results. The efficacy of single and double intramuscular 4.7 mg deslorelin acetate implants in captive pond sliders (Trachemys scripta) was investigated, with 20 animals divided into three groups: a single-implant group (6 animals), a double-implant group (6 animals), and a control group (no implant). During one reproductive season (March to October), plasmatic concentration of sexual hormones (estradiol, progesterone, and testosterone) and ovarian morphometric activity via computed tomography were monitored about every 30 days. A significative decrease in the number of phase II ovarian follicles was detected in the double-implant group compared with the control group, but no significant difference was noted in the number of phase III and phase IV follicles, egg production, and plasmatic concentration of sexual hormones. Results show that neither a single nor a double deslorelin acetate implant can successfully inhibit reproduction in female pond sliders during the ongoing season, but the lower number of phase II follicles in the double-implant group can possibly be associated with reduced fertility in the following seasons.

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“…Female lizards (veiled chameleons, bearded dragons and green iguanas) kept under low quality husbandry practices (e.g. sub-optimal temperatures, limited exposure to UVB ultraviolet radiation, small terraria with crowding and stress and an insufficient feeding regime) suffer from retained ovarian follicles (or pre-ovulatory follicular stasis) and dystocia (or egg binding, post-ovulatory egg stasis) (Dorrestein et al 2007;Kneidinger 2009;Knotek et al 2009;Kummrow et al 2010;Knotek et al 2017).…”

mentioning

confidence: 99%

Effect of a GnRH agonist (deslorelin) on ovarian activity in leopard geckos (Eublepharis macularius)

Eva¹,

Oliveri²,

Knotková³

et al. 2019

Vet. Med.

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The aim of this study was to evaluate the effectiveness of deslorelin acetate in the regulation of reproductive activity in captive leopard geckos (Eublepharis macularius). Fourteen healthy adult females were separated into two groups. Under general anaesthesia, deslorelin acetate implants (4.7 mg) or placebo implants were administered into the coelom of ten female geckos and four female geckos, respectively. One healthy adult male Leopard gecko was added to each group of females (five females with GnRH implants and two females with placebo implants). The geckos were regularly monitored over two breeding seasons (visual examination, weight control). Nesting sites were checked daily. There were no postoperative complications or any other health problems during the study. Implant administration did not result in long-term suppression of reproductive function. No significant differences were found in the number of clutches between the female groups (deslorelin implants versus placebo implants) or in the number of clutches between the two breeding seasons. Deslorelin acetate implants did not interfere with ovarian activity in captive female leopard geckos. The use of GnRH agonist implants is not an appropriate method for control of reproductive function in female leopard geckos.

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Reproductive Medicine in Lizards

Cited by 25 publications

References 10 publications

Non-invasive and husbandry treatment in a singular post-ovulatory egg stasis on an Asian water monitor (Varanus salvator)

Non-invasive and husbandry treatment in a singular post-ovulatory egg stasis on an Asian water monitor (Varanus salvator)

Determination of Efficacy of Single and Double 4.7 mg Deslorelin Acetate Implant on the Reproductive Activity of Female Pond Sliders (Trachemys scripta)

Effect of a GnRH agonist (deslorelin) on ovarian activity in leopard geckos (Eublepharis macularius)

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