Multiple paternity and maintenance of genetic diversity in the live-bearing rockfishes Sebastes spp.

Hyde, John R.; Kimbrell, Carol A.; Robertson, Larry D.; Clifford, Kevin; Lynn, Eric A.; Vetter, Russell D.

doi:10.3354/meps07296

Cited by 26 publications

(25 citation statements)

References 32 publications

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“…Another potential benefit of multiple mating for individual females is the potential reduction in the probability of incomplete fertilization of eggs in a brood (Gunderson 1977, Sogard et al 2008. As a consequence of the benefits to individual females, the population may benefit from reduced inbreeding depression, and an increase in the effective population size (N E ; Hyde et al 2008). Evidence for hybrid matings was surprisingly common in our data (9 of 14 broods).…”

Section: Parentage Analysismentioning

confidence: 73%

“…No evidence of multiple paternity was found in broods from quillback rockfish. Multiple paternity has been described in 13 of 21 rockfish species examined to date (Yoshida et al 2001, Hyde et al 2008, Sogard et al 2008, Van Doornik et al 2008, Blanco Gonzalez et al 2009, and seems to be common in the genus. Considering the close relationship of copper and quillback rockfishes (Hyde & Vetter 2007), the absence of evidence of multiple paternity in quillback rockfish in the present study may be a consequence of low sample size, rather than evidence that it does not occur.…”

Section: Parentage Analysismentioning

confidence: 99%

“…Multiple paternity may be a bet-hedging strategy for rockfishes when a female's knowledge of mate selection criteria is imperfect (Yasui 2001). Such a strategy may improve the genetic diversity of offspring from a single female, thereby improving the odds that some fraction of her larvae encounter favorable environmental conditions and survive (Cushing 1990, Hyde et al 2008, Van Doornik et al 2008. Another potential benefit of multiple mating for individual females is the potential reduction in the probability of incomplete fertilization of eggs in a brood (Gunderson 1977, Sogard et al 2008.…”

Section: Parentage Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Ultimately, the decision whether or not to mate appears to lie with the female (Hyde et al 2008). Multiple mating, with up to 4 different fathers, has been demonstrated in 13 different rockfish species to date, and may be a common bethedging strategy in the genus when mate selection criteria are uncertain or incomplete (Yasui 2001, Hyde et al 2008, Sogard et al 2008, Van Doornik et al 2008, Blanco Gonzalez et al 2009). As consequences of selective mate choice by females and multiple paternity, a population of organisms that experiences sweepstakes recruitment, such as rockfishes, may experience enhanced genetic diversity and avoid the loss of rare alleles, may see diminished impacts of inbreeding depression, and may benefit from increased effective population size (Hedgecock 1994).…”

Section: Introductionmentioning

confidence: 99%

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Mate selection in captive-breeding rockfishes Sebastes spp.: inference from parentage analysis and the major histocompatibility complex (MHC)

Johansson¹,

Clifford²,

Fodness³

et al. 2012

Mar. Ecol. Prog. Ser.

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Rockfish species of the genus Sebastes are notable for being numerous and diverse. Rockfishes are unusual among fish because they fertilize their eggs internally and release live, swimming larvae. They undergo complex courting behaviors, which may allow females to be selective about their mates. The major histocompatibility complex (MHC) is implicated as having an important influence on mate selection in other fishes, especially in sticklebacks and salmonids. Research suggests that females choose mates that optimize the MHC genotypes of their offspring. Previous research on rockfishes indicates that multiple functional MHC sequences may be found in each species, and that multiple mating is common in the genus, possibly as a bet-hedging strategy against uncertain or incomplete mate-selection information. In this project, we characterized the MHC genotypes of copper (S. caurinus) and quillback (S. maliger) rockfish parents, assessed parentage of 14 larval broods, and assessed the MHC genotypes of the parents to determine if MHC-mediated mate choice was occurring. As in previous studies, we found that rockfishes possess multiple, highly variable MHC genes, and that females may mate with multiple males. We also found evidence of female preference for particular males. However, we found no strong evidence of selection based on MHC genotype. Females were not consistently selective based on relatedness, allele count, proportion of shared alleles, or minimum, mean, or maximum DNA or amino acid genetic distance. Instead, it appears that females were selective based on other measures of mate quality not considered in this study, with some hedging of bets through multiple mating also occurring.

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Section: Parentage Analysismentioning

confidence: 73%

Section: Parentage Analysismentioning

confidence: 99%

Section: Parentage Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mate selection in captive-breeding rockfishes Sebastes spp.: inference from parentage analysis and the major histocompatibility complex (MHC)

Johansson¹,

Clifford²,

Fodness³

et al. 2012

Mar. Ecol. Prog. Ser.

Self Cite

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An integrative mating system assessment of a nonmodel, economically important Pacific rockfish (Sebastes melanops) reveals nonterritorial polygamy and conservation implications for a large species flock

Karageorge

Wilson

2017

Ecology and Evolution

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Characterizing the mating systems of long‐lived, economically important Pacific rockfishes comprising the viviparous Sebastes species flock is crucial for their conservation. However, direct assignment of mating success to sires is precluded by open, offshore populations and high female fecundity. We addressed this challenge by integrating paternity‐assigned mating success of females with the adult sex ratio (ASR) of the population, male evolutionary responses to receptive females, and reproductive life history traits—in the framework of sexual selection theory—to assess the mating system of Sebastes melanops. Microsatellite parentage analysis of 17 pregnant females, 1,256 of their progeny, and 106 adults from the population yielded one to four sires per brood, a mean of two sires, and a female mate frequency distribution with a truncated normal (random) pattern. The 11 multiple paternity broods all contained higher median allele richness than the six single paternity broods (Wilcoxon test: W = 0, p < .001), despite similar levels of average heterozygosity. By sampling sperm and alleles from different males, polyandrous females gain opportunities to enhance their sperm supply and to lower the cost of mating with genetically incompatible males through reproductive compensation. A mean of two mates per mated female with a variance of one, an ASR = 1.2 females per male, and the expected population mean of 2.4 mates for mated males (and the estimated 35 unavailable sires), fits polygamous male mate frequency distributions that distinguish polygynandry and polyandrogyny mating systems, that is, variations of polygamy, but not polyandry. Inference for polygamy is consistent with weak premating sexual selection on males, expected in mid‐water, schooling S. melanops, owing to polyandrous mating, moderately aggregated receptive females, an even ASR, and no territories and nests used for reproduction. Each of these characteristics facilitates more mating males and erodes conspicuous sexual dimorphism. Evaluation of male evolutionary responses of demersal congeners that express reproductively territorial behavior revealed they have more potential mechanisms for producing premating sexual selection, greater variation in reproductive success, and a reduced breeding effective population size of adults and annual effective size of a cohort, compared to S. melanops modeled with two mates per adult. Such divergence in behavior and mating system by territorial species may differentially lower their per capita birth rates, subsequent population growth, and slow their recovery from exploitation.

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Paternal genotype reconstruction reveals multiple paternity and sex ratios in a breeding population of leatherback turtles (Dermochelys coriacea)

Stewart

Dutton

2011

Conserv Genet

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When animals are difficult to observe while breeding, insights into the mating system may be gained by using molecular techniques. Patterns of extra-pair copulation, multiple paternity and parental genotype analysis may elucidate population characteristics that help improve knowledge of life history while informing management decisions. During the course of a long-term study of leatherback turtles, we assessed the level of multiple paternity in successive clutches for 12 known females nesting at Sandy Point National Wildlife Refuge (St. Croix, U.S. Virgin Islands). We used seven polymorphic microsatellite markers to genotype the females and 1,019 hatchlings representing 38 nests (3-4 clutches from each female). Using deductive genotype reconstruction and GERUD1.0, we identified the 12 mothers and 17 different fathers that were responsible for 38 nests. We found that seven females (58.3%) showed no evidence of multiple paternity in their clutches, while five females (41.7%) had mated with two males each. There was evidence of two fathers (polyandry) in successive clutches for these five females. Multiple fathers didn't contribute to clutches equally. For clutches laid by an individual female, the primary father was responsible for 53.7 to 85.9% of the hatchlings. We demonstrate the feasibility of using male genotype reconstruction to characterize the male component of this breeding population and to assess operational sex ratios for breeding sea turtles.

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Multiple paternity and maintenance of genetic diversity in the live-bearing rockfishes Sebastes spp.

Cited by 26 publications

References 32 publications

Mate selection in captive-breeding rockfishes Sebastes spp.: inference from parentage analysis and the major histocompatibility complex (MHC)

Mate selection in captive-breeding rockfishes Sebastes spp.: inference from parentage analysis and the major histocompatibility complex (MHC)

An integrative mating system assessment of a nonmodel, economically important Pacific rockfish (Sebastes melanops) reveals nonterritorial polygamy and conservation implications for a large species flock

Paternal genotype reconstruction reveals multiple paternity and sex ratios in a breeding population of leatherback turtles (Dermochelys coriacea)

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