Minimization of genetic diversity loss of endangered fish species captive broodstocks by means of minimal kinship selective crossbreeding

Ortega-Villaizán, M.; Noguchi, Daiki; Taniguchi, Nobuyuki

doi:10.1016/j.aquaculture.2011.04.047

Cited by 19 publications

(15 citation statements)

References 21 publications

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“…Alternatively, conducting single-pair mating among non-related individuals and ensuring equal reproductive success among them could help maintaining the current level of genetic variability (Letcher and King, 1999). In this sense, implementing crossbreeding selective models based on minimum kinship has been shown to perform better than random models at preserving diversity under low effective broodstock size (Ortega-Villaizan et al, 2011). …”

Section: Evolution Of Relatedness and Breeding Protocolsmentioning

confidence: 99%

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

et al. 2016

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Section: Evolution Of Relatedness and Breeding Protocolsmentioning

confidence: 99%

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

et al. 2016

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“…Another approach is to manage captive populations using molecular relatedness estimator values as proxies for pedigreebased kinships (hereafter termed minimal relatedness [mr] selection; Doyle et al 2001;del Mar Ortega-Villaizan et al 2011). Minimal relatedness selection has previously been referred to as minimal kinship (MK) selection, but we distinguish it from pedigree-based MK selection because it is based on molecular relatedness estimators and is not a strict application of MK selection as defined by Ballou and Lacy (1995).…”

Section: Broodstock Spawningmentioning

confidence: 99%

“…Using this method, it is possible to incorporate information about individual relatedness into the design of mating schemes with the intention of retaining founder genetic diversity (Doyle et al 2001). A simulation study examined the performance of mr selection in a Barfin Flounder Verasper moseri captive broodstock program and determined that it retained both genetic and allelic diversities better than random mating (del Mar Ortega-Villaizan et al 2011).…”

Section: Broodstock Spawningmentioning

confidence: 99%

Fish Hatchery Genetic Management Techniques: Integrating Theory with Implementation

et al. 2015

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Artificial propagation of fish species in hatcheries has been conducted on a large scale for several decades. In recent years, however, there has been an increase in conservation hatcheries, which aim not only to produce fish for supplementing wild populations but also to preserve the genetic diversity and integrity of threatened or endangered species. Important considerations for the latter are maximizing genetic diversity and effective population size while minimizing inbreeding and adaptation to captivity. Several studies document the theoretical implementation of captive management strategies designed to achieve these goals. However, the practical application of many of these strategies to conservation hatcheries remains challenging, as the majority of the guidelines were developed for small zoo populations. The aims of this review are (1) to survey current fish conservation hatchery managers in order to assess current hatchery practices and goals; (2) to present available management strategies for conservation hatcheries that may minimize the genetic effects of artificial propagation; and (3) to present genetic management options and their trade‐offs to managers developing fish conservation hatcheries. The results of the survey suggest that the majority of the responding conservation and nonconservation hatcheries use random broodstock selection and pairing techniques while valuing the importance of maintaining genetic diversity and effective population size and minimizing inbreeding. This article reviews the application of small‐population management techniques to conservation hatcheries in an effort to increase their utility in recovery plans for endangered fish species.

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“…Theory predicts that selecting breeders that minimize each generation's mean kinship should reduce the rate of population evolution by more effectively retaining genetic diversity compared to random mating (Frankham ; Ortega‐Villaizan et al . ; Ivy & Lacy ). However, this theory remains largely untested empirically (Williams & Hoffman ).…”

Section: Introductionmentioning

confidence: 99%

The impacts of inbreeding, drift and selection on genetic diversity in captive breeding populations

et al. 2014

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The goal of captive breeding programmes is often to maintain genetic diversity until re-introductions can occur. However, due in part to changes that occur in captive populations, approximately one-third of re-introductions fail. We evaluated genetic changes in captive populations using microsatellites and mtDNA. We analysed six populations of white-footed mice that were propagated for 20 generations using two replicates of three protocols: random mating (RAN), minimizing mean kinship (MK) and selection for docility (DOC). We found that MK resulted in the slowest loss of microsatellite genetic diversity compared to RAN and DOC. However, the loss of mtDNA haplotypes was not consistent among replicate lines. We compared our empirical data to simulated data and found no evidence of selection. Our results suggest that although the effects of drift may not be fully mitigated, MK reduces the loss of alleles due to inbreeding more effectively than random mating or docility selection. Therefore, MK should be preferred for captive breeding. Furthermore, our simulations show that incorporating microsatellite data into the MK framework reduced the magnitude of drift, which may have applications in long-term or extremely genetically depauperate captive populations.

show abstract

Minimization of genetic diversity loss of endangered fish species captive broodstocks by means of minimal kinship selective crossbreeding

Cited by 19 publications

References 21 publications

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

First-generation genetic drift and inbreeding risk in hatchery stocks of the wreckfish Polyprion americanus

Fish Hatchery Genetic Management Techniques: Integrating Theory with Implementation

The impacts of inbreeding, drift and selection on genetic diversity in captive breeding populations

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