Opportunities and challenges related to sperm cryopreservation in Atlantic salmon gene banks

Bøe, Kristin; Bjøru, Bjørn; Bårdsen, Marthe Tangvold; Wist, Anveig Nordtug; Wolla, Steffen; Sivertsen, Arne

doi:10.1111/csp2.552

Cited by 9 publications

(7 citation statements)

References 58 publications

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“…It is therefore pointless to invest in major biobanking projects that rely entirely on the use of cryopreserved, but untested, sperm samples. However, it is worth mentioning that the IUCN Species Survival Commission recently established an Animal Biobanking Specialist Group in 2022, thus endorsing the value that is currently being placed on biobanking as a further resource for species recovery programs (https://www.iucn.org/our-union/commissions/group/iucn-ssc-animalbiobanking-conservation-specialist-group) Agricultural and fisheries biobanks that focus on commercially significant species and breeds (Blackburn, 2018;Boe et al, 2021), as well as those focused on basic sciences and that store particular genetic lines of mice (Kaneko and Serikawa, 2012;Landel, 2005) and small fishes (Tiersch et al, 2011;Yang and Tiersch, 2009) ensure that their stocks of spermatozoa are reliably fertile. This level of assurance is not currently possible with most wild species, and it is for that reason that I regard only the Black-footed ferret and Giant panda projects as possessing well-established sperm biobanks.…”

Section: Integration Of Biobanks and Biodiversity Conservationmentioning

confidence: 99%

“…Agricultural and fisheries biobanks that focus on commercially significant species and breeds ( Blackburn, 2018 ; Boe et al, 2021 ), as well as those focused on basic sciences and that store particular genetic lines of mice ( Kaneko and Serikawa, 2012 ; Landel, 2005 ) and small fishes ( Tiersch et al, 2011 ; Yang and Tiersch, 2009 ) ensure that their stocks of spermatozoa are reliably fertile. This level of assurance is not currently possible with most wild species, and it is for that reason that I regard only the Black-footed ferret and Giant panda projects as possessing well-established sperm biobanks.…”

Section: Integration Of Biobanks and Biodiversity Conservationmentioning

confidence: 99%

“…Moreover, reproductive biotechnologists may be able to contribute their skills to the mitigation efforts, especially through technologies such as cryobiology, the biobanking of reproductive cells and tissues for future use in supporting, or even regenerating, threatened populations ( Holt and Comizzoli, 2021 ). Some of the available technologies have their origins in agriculture and fisheries, where it is now commonplace to use artificial insemination (AI) for breeding domestic mammals and some birds, and to use cryopreserved spermatozoa for breeding over 200 commercially important fish species ( Boe et al, 2021 ; Mayer, 2019 ). However, it is very clear that for wild species, sperm cryopreservation techniques have to be refined for every target species ( Comizzoli and Holt, 2022 ; Holt and Comizzoli, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

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Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Holt

2023

Anim. Reprod.

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Mitigation of the widely known threats to the world's biodiversity is difficult, despite the strategies and actions proposed by international agreements such as the United Nations Framework Convention on Climate Change (UNFCCC) and the Convention on Biological Diversity (CBD). Nevertheless, many scientists devote their time and effort to finding and implementing various solutions to the problem. One potential way forward that is gaining popularity involves the establishment of biobank programs aimed at preserving and storing germplasm from threatened species, and then using it to support the future viability and health of threatened populations. This involves developing and using assisted reproductive technologies to achieve their goals. Despite considerable advances in the effectiveness of reproductive technologies, differences between the reproductive behavior and physiology of widely differing taxonomic groups mean that this approach cannot be applied with equal success to many species. Moreover, evidence that epigenetic influences and developmental plasticity, whereby it is now understood that embryonic development, and subsequent health in later life, can be affected by peri-conceptional environmental conditions, is raising the possibility that cryopreservation methods themselves may have to be reviewed and revised when planning the biobanks. Here, I describe the benefits and problems associated with germplasm biobanking across various species, but also offer some realistic assessments of current progress and applications.

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Section: Integration Of Biobanks and Biodiversity Conservationmentioning

confidence: 99%

Section: Integration Of Biobanks and Biodiversity Conservationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Holt

2023

Anim. Reprod.

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“…The cryopreservation of sperm represents a multifaceted technique offering a plethora of advantages in fisheries management. These include the conservation of genetic diversity within fish populations, the preservation of gametes sourced from elite breeding individuals, facilitation of genetic material transport, and the provision of a reliable sperm reservoir independent of broodstock maturation synchronization (Judycka et al, 2019a;Bøe et al, 2021). However, despite considerable strides in standardizing cryopreservation protocols for fish semen, the practical application of cryopreserved sperm faces a myriad of challenges outweighing opportunities.…”

Section: Challenges Of Cryopreservationmentioning

confidence: 99%

Preservation of fish male germplasm in Poland

Judycka,

Dietrich,

Nynca

et al. 2024

Front. Mar. Sci.

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The natural resources of a country, including ichthyofauna, constitute a vital aspect of its national heritage. Fish populations are threatened with loss of biodiversity as a result of human activity (anthropopressure), resulting in water pollution, habitat destruction and overfishing. Additionally, the escalating threat is exacerbated by climate change, primarily manifested in periodic reservoir and watercourse desiccation. Genetic variability of captive is also threated as fish raised in hatcheries are susceptible to bacterial and viral diseases. Therefore, methodologies for fish sperm cryopreservation aimed at safeguarding the gene pool of both natural and captive fish populations assume paramount importance for their conservation and mitigation of irreversible losses, particularly crucial in light of increasing ecological disasters. This paper offers an overview of cryopreservation research in Poland, tracing back to early initiatives in the 1970s concerning carp (Cyprinus carpio) semen and culminating in recent advancements, where standardized cryopreservation methodologies were developed. We delve into the freezing results of semen of various fish species, encompassing both wild specimens like whitefish (Coregonus lavaretus) and lake minnows (Eupallasella percnurus), and farmed species such as sturgeons, carp, and numerous salmonid species. Additionally, we delineate projects that support such endeavors. Recent milestones in the establishment of fish sperm cryobanks in Poland catering to both wild and farmed species, including carp and rainbow trout (Oncorhynchus mykiss) – the most economically significant fish in Poland were presented. We also expound on the implementation of cryopreserved semen from sex-reversed rainbow trout in hatchery practices. Furthermore, we discuss significant challenges pertaining to sperm banking, particularly concerning funding and the practical utilization of cryostored semen samples for egg fertilization under hatchery conditions.

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“…Because Yaqui Catfish are long-lived and iteroparous, broodstock that produce few surviving offspring can be respawned to retain their genetic variation in introduced populations. Cryopreservation of sperm can extend the reproductive life of males beyond their natural life span and can be used to slow the loss of genetic variation over time (Boe et al 2021).…”

Section: Key Program Element Descriptionmentioning

confidence: 99%

The optimal stocking strategy for Yaqui Catfish

Stewart,

Barron,

Harden

et al. 2023

N American J Fish Manag

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The Yaqui Catfish Ictalurus pricei, a species endemic to the southwestern United States and west‐central Chihuahua and Sonora, Mexico, is extinct in the United States and extremely endangered in Mexico due to habitat loss and hybridization with nonnative Channel Catfish Ictalurus punctatus. To re‐establish populations in the United States, a binational program consisting of broodstock collection, fish propagation, stocking, and post‐stocking monitoring is necessary. This programmatic approach is encapsulated within a Conservation Propagation and Stocking Program (CPSP), which documents important recovery actions, such as genetic management, fish culture, stocking, and post‐stocking assessments. The focus of our work is to identify the optimal stocking strategy for Yaqui Catfish, thereby informing the framework of a CPSP for the species’ recovery. Our strategy involved simulating population growth using an age‐structured simulation model with varying amounts of stocking contribution rates, stocking density, and stocking frequency, and incorporating these biological data with economic information within a utility function to quantify stocking costs. The optimal strategy requires releasing Yaqui Catfish at a density of 200 ha‐1 every 5 years. This strategy excludes natural recruitment, as historically, stocked Yaqui Catfish inhabited waters that were either too small or void of habitat to induce natural spawning. However, were larger waters or waters having appropriate habitats (e.g., interstitial spaces) also stocked, it should increase natural recruitment, thereby enabling populations to become self‐sustaining and drastically reduce the reliance on hatcheries for stocking and salvaging declining populations. Our results provide important stocking recommendations within a CPSP, emphasizing the need to build a broodstock before genetically pure Yaqui Catfish disappear. The successful implementation of the optimal stocking strategy requires multiple locations to stock fish and is contingent on strengthening binational partnerships. This approach fills an important void in Yaqui Catfish re‐establishment, helping prime the successful recovery of this species.

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Opportunities and challenges related to sperm cryopreservation in Atlantic salmon gene banks

Cited by 9 publications

References 58 publications

Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Biobanks, offspring fitness and the influence of developmental plasticity in conservation biology

Preservation of fish male germplasm in Poland

The optimal stocking strategy for Yaqui Catfish

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