Sex-Linked Growth Divergence of Summer Flounder from a Commercial Farm

King, Nöel; Nardi, George C.; Jones, Carroll J.

doi:10.1300/j028v11n01_07

Cited by 23 publications

(28 citation statements)

References 2 publications

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“…Irrespective of water temperature or male parentage, however, the fish in these studies developed predominantly as phenotypic males. While several other studies have reported most, or all male differentiation in summer flounder raised at relatively high water temperatures (≥19°C) (King et al 2001;Specker & Chandlee 2003;Carroll, Watanabe & Losordo 2005;Colburn et al 2009), to our knowledge, no reports of female-skewed or balanced sex ratios have been reported for normal, cultured fish of this species, nor have we observed such changes during commercial production. Although Colburn et al (2009) reported higher proportions of female, normal and meiognogenetic fish (26% and 64% respectively) when raised at very low temperatures (12°C for 178 days), the conditions conducive for inducing female differentiation at the expected ratios (50% and 100% respectively) were not achieved.…”

Section: Discussioncontrasting

confidence: 76%

“…Growth rate remains the dominant factor controlling profitability of land-based culture of this species, and the costs associated with juvenile growth to market size must be reduced to gain competitiveness on the global market (King, Nardi & Jones 2001). Summer flounder, like other Paralichthyd species, exhibit sexually dimorphic growth rates, with females growing considerably faster and larger than males (Morse 1981;King et al 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Summer flounder, like other Paralichthyd species, exhibit sexually dimorphic growth rates, with females growing considerably faster and larger than males (Morse 1981;King et al 2001). A tremendous increase in growth performance could therefore be realized through the production of all-female populations of fingerlings (King et al 2001).…”

Section: Introductionmentioning

confidence: 99%

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Sex differentiation of summer flounder (Paralichthys dentatesL.) raised at practical hatchery temperatures

Colburn

Breton

Nardi³

et al. 2013

Aquac Res

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Female summer flounder grow considerably faster than males, and rearing temperature has been shown to influence sex differentiation in related species. The present studies were conducted to examine sex differentiation of post-metamorphic juveniles reared at temperatures conducive for commercial production. In experiments 1 and 2, offspring produced from crosses with meiogynogenetic, sex-reversed males and normal females were raised at 14, 16 or 18°C for ≥300 days or 12°C for 30, 60 or 120 days and then transferred to a male-determining temperature (21°C). In all cases, the fish developed predominantly as phenotypic males (≥74%). In a third experiment, offspring produced from crosses with normal males and females were reared at 15, 17 and 19°C for 111, 227 and 278 days and then transferred to 21°C. Most fish (≥92.1%) developed as phenotypic males irrespective of rearing temperature or length of exposure. Several hypotheses are proposed for these findings and further research is necessary to understand the sex-determining mechanisms in this species before the economic advantages associated with sexually dimorphic growth can be realized.

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Section: Discussioncontrasting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Sex differentiation of summer flounder (Paralichthys dentatesL.) raised at practical hatchery temperatures

Colburn

Breton

Nardi³

et al. 2013

Aquac Res

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“…Female Summer Flounder Paralichthys dentatus grow faster (Poole 1961;King et al 2001) and mature at a larger size (Able and Kaiser 1994;Packer et al 1999) than males. In addition, the sex ratio of young fish is skewed in favor of males, probably due to a complex interaction between temperature and the biochemistry of sex determination (Luckenbach et al 2009).…”

mentioning

confidence: 99%

“…We discuss the spatiotemporal distributions of the fish and of the fishing effort in more detail below. The MRS in each fishery, operating on the sex-specific growth rates (Poole 1961;King et al 2001), forces a higher fraction of females at age in the catch than would be expected N) and sex. The black horizontal line within each box is the mean, the ends of the box represent the interquartile range, the ends of whiskers denote the 5th and 95th percentiles, and the dots are outliers.…”

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confidence: 99%

Estimating the Sex Composition of the Summer Flounder Catch using Fishery‐Independent Data

et al. 2015

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Models that account for sex‐specific behavior and population dynamics are becoming more common in the stock assessment of sexually dimorphic fishes. However, such models can be data intensive and require some knowledge or assumptions about the sex ratio of fishery landings. A recent stock assessment review of Summer Flounder Paralichthys dentatus identified the need to account for sex‐specific fishing mortality in the assessment model; however, no data on the sex composition of the catch were available. Fishery‐independent, sex‐specific information for this species is collected annually by the National Marine Fisheries Service's Northeast Fisheries Science Center during their bottom trawl survey. Sex at age from the survey could be applied to the fishery landings if the probability of landing a given sex at a given age is equivalent for fish collected by the survey and those in the landings. To generate the first regionally comprehensive database on the sex ratio of Summer Flounder landings and to determine the efficacy of using survey sex‐at‐age keys to estimate the sex of landed fish, we recorded the sex composition of the commercial and recreational catches of Summer Flounder (n = 31,912) in 2010 and 2011. When (1) trawl survey length data were left‐truncated to simulate the minimum retention sizes in the fisheries and (2) age–length keys generated from fishery‐dependent data were applied to length frequency distributions from the survey to simulate the growth rates of landed fish, the sex‐at‐age pattern in the survey‐derived data closely resembled the patterns in the catch. However, statistically significant differences in sex at age remained between the catch and the survey‐derived data. We hypothesize that these differences are attributable to differences in the spatiotemporal distributions of the sexes and of the survey and fishing effort. Received March 9, 2015; accepted June 23, 2015

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Sex Control in Southern and Summer Flounder

Chen

Zhao

et al. 2018

Sex Control in Aquaculture

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Sex-Linked Growth Divergence of Summer Flounder from a Commercial Farm

Cited by 23 publications

References 2 publications

Sex differentiation of summer flounder (Paralichthys dentatesL.) raised at practical hatchery temperatures

Sex differentiation of summer flounder (Paralichthys dentatesL.) raised at practical hatchery temperatures

Estimating the Sex Composition of the Summer Flounder Catch using Fishery‐Independent Data

Sex Control in Southern and Summer Flounder

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