Reproductive Biology of Crocodilians

Hale, Matthew D.; Cloy-McCoy, Jessica A.; Doheny, Brenna M.; Parrott, Benjamin B.

doi:10.1016/b978-0-12-809633-8.20612-2

Cited by 3 publications

(7 citation statements)

References 17 publications

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Section: Crocodiliansmentioning

confidence: 99%

“…Crocodilians are typically solitary, although dominant males usually monopolize reproductive females and patrol and defend territories harboring the females [260]. Copulation occurs in the water [260]. Females lay eggs in holes or in mounds and, unlike most other non-avian reptiles, care for their hatched young [260].…”

Section: Crocodiliansmentioning

confidence: 99%

“…Copulation occurs in the water [260]. Females lay eggs in holes or in mounds and, unlike most other non-avian reptiles, care for their hatched young [260]. The number of eggs laid in a single clutch ranges from ten to fifty [260].…”

Section: Crocodiliansmentioning

confidence: 99%

“…Females lay eggs in holes or in mounds and, unlike most other non-avian reptiles, care for their hatched young [260]. The number of eggs laid in a single clutch ranges from ten to fifty [260]. Crocodilian eggs are protected by hard shells made of calcium carbonate [260].…”

Section: Crocodiliansmentioning

confidence: 99%

“…The number of eggs laid in a single clutch ranges from ten to fifty [260]. Crocodilian eggs are protected by hard shells made of calcium carbonate [260]. The incubation period is two to three months [260].…”

Section: Crocodiliansmentioning

confidence: 99%

See 4 more Smart Citations

Exploring the global animal biodiversity in the search for new drugs - Reptiles

Mans¹,

Djotaroeno²,

Pawirodihardjo³

et al. 2021

J Transl Sci

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Section: Crocodiliansmentioning

confidence: 99%

Section: Crocodiliansmentioning

confidence: 99%

Section: Crocodiliansmentioning

confidence: 99%

Section: Crocodiliansmentioning

confidence: 99%

Section: Crocodiliansmentioning

confidence: 99%

See 3 more Smart Citations

Exploring the global animal biodiversity in the search for new drugs - Reptiles

Mans¹,

Djotaroeno²,

Pawirodihardjo³

et al. 2021

J Transl Sci

View full text Add to dashboard Cite

show abstract

Post-testicular sperm maturation in the saltwater crocodile

Nixon

Anderson

Bromfield

et al. 2021

Reprod. Fertil. Dev.

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Conservation efforts to secure the long-term survival of crocodilian species would benefit from the establishment of a frozen sperm bank in concert with artificial breeding technologies to maintain genetic diversity among captive assurance populations. Working towards this goal, our research has focused on the saltwater crocodile Crocodylus porosus as a tractable model for understanding crocodilian sperm physiology. In extending our systematic characterisation of saltwater crocodile spermatozoa, in this study we examined the development of motility during sperm transport through the excurrent duct system of the male crocodile. The results show that approximately 20% of crocodile testicular spermatozoa are immediately motile but experience a gradient of increasing motility (percentage motile and rate of movement) as they transit the male reproductive tract (epididymis). Moreover, we confirmed that, as in ejaculated crocodile spermatozoa, increased intracellular cAMP levels promoted a significant and sustained enhancement of sperm motility regardless of whether the cells were isolated from the testis or epididymis. Along with the development of artificial reproductive technologies, this research paves the way for the opportunistic recovery, storage and potential utilisation of post-mortem spermatozoa from genetically valuable animals.

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Assisted breeding technology in the saltwater crocodile

Johnston

Lever²,

McLeod³

et al. 2021

Reprod. Fertil. Dev.

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This review reports the current status of artificial breeding technology in the Crocodylia and the future requirements for the establishment of AI in the saltwater crocodile. Although there are challenges regarding safe restraint and immobilisation, semen collection of the saltwater crocodile by manual stimulation has proven effective in yielding sufficient volume and sperm concentrations for empirical and molecular analyses of sperm preservation and physiology. Nevertheless, there is still much to learn with respect to fundamental anatomy, physiology and behaviour in both sexes, but particularly in the female. Although lessons can be learned from successful AI in the alligator, the details of this research are not readily accessible. Future research needs to focus on the proximate factors of seasonality and the underlying control of the female’s annual reproductive cycle; this will require novel and innovative ways to collect blood samples without causing stress or injury, and ideally a dedicated crocodile research breeding colony. Because the saltwater crocodile is a farmed species, there is likely to be sufficient impetus for the application of assisted breeding technology to drive future productivity in the industry. These developments will also have benefits for the genetic and reproductive management of endangered captive populations.

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Reproductive Biology of Crocodilians

Cited by 3 publications

References 17 publications

Exploring the global animal biodiversity in the search for new drugs - Reptiles

Exploring the global animal biodiversity in the search for new drugs - Reptiles

Post-testicular sperm maturation in the saltwater crocodile

Assisted breeding technology in the saltwater crocodile

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