Assisted Reproductive Technologies in Amphibian Conservation
Summary
Amphibian populations are experiencing unprecedented declines driven by habitat loss, disease and climate change, placing numerous species at risk of extinction. Assisted reproductive technologies (ART) offer powerful tools to augment traditional conservation breeding programmes and maintain genetic diversity within dwindling populations. These methods encompass hormone-induced gamete release, in vitro fertilisation (IVF), gamete cryopreservation and genome resource banking. By enabling controlled spawning, rapid expansion of founder lines and long-term storage of genetic material, ART can circumvent environmental or behavioural barriers to reproduction in captivity. Practical applications range from stimulating spermiation and ovulation through targeted hormone protocols to establishing biobanks of sperm and oocytes for future reintroduction efforts. Integrated ART approaches support demographic and genetic management objectives, bolster ex situ assurance colonies and facilitate linkage between wild and captive populations. As conservation priorities intensify globally, the refinement and standardisation of amphibian ART will be critical to securing viable populations for release and habitat restoration initiatives.
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Assisted Reproductive Technologies in Amphibian Conservation publication trend
The graph below shows the total number of articles in assisted reproductive technologies in amphibian conservation across all publications each year (not limited to Nature Index journals).
Technical terms
Assisted reproductive technologies (ART): A suite of techniques including hormone-induced gamete release, in vitro fertilisation and cryopreservation, designed to support captive breeding and genetic management of threatened species.
Spermiation: The process by which males are induced to release spermatozoa into urine or external media following hormonal stimulation.
Ovulation induction: The administration of exogenous hormones to trigger oocyte maturation and release in female amphibians.
In vitro fertilisation (IVF): The external combination of sperm and eggs to generate embryos outside the reproductive tract.
Genome resource banking: The cryogenic storage of gametes or gonadal tissue to preserve genetic diversity for future breeding and reintroduction efforts.
References
- Hormone-induced sperm-release in the critically endangered Booroolong frog (Litoria booroolongensis): effects of gonadotropin-releasing hormone and human chorionic gonadotropin. Conservation Physiology (2019).
- Hormonal induction of spermiation in a Eurasian bufonid (Epidalea calamita). Reproductive Biology and Endocrinology (2019).
- Integrating biobanking minimises inbreeding and produces significant cost benefits for a threatened frog captive breeding programme. Conservation Letters (2020).
- Linking in‐situ and ex‐situ populations of threatened amphibians through genome banking. Conservation Science and Practice (2021).
- Applying cryopreservation to anuran conservation biology. Conservation Science and Practice (2019).
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