Plasticity in resource allocation based life history traits in the Pacific oyster, <i>Crassostrea gigas</i>. I. Spatial variation in food abundance

Ernande, Bruno; Boudry, Pierre; Clobert, Jean; Haure, Joël

doi:10.1046/j.1420-9101.2003.00674.x

Cited by 107 publications

(106 citation statements)

References 70 publications

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“…The findings of this and previous studies (Widdows and Shick, 1985;Lesser, 2016) in relation to changing metabolisms of intertidal bivalves when transplanted, suggest that oysters are highly plastic (Collicutt and Hochachka, 1977;Greenway and Storey, 1999;Hamdoun et al, 2003;Ernande et al, 2004;David et al, 2005;Zhang et al, 2012). Plastic responses allow for an immediate response to cope with, and potentially overcome, a stressor (West-Eberhard, 1989).…”

Section: Condition Indexmentioning

confidence: 51%

Intertidal oysters reach their physiological limit in a future high-CO2 world

Scanes

Parker

O’Connor

et al. 2017

Journal of Experimental Biology

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Sessile marine molluscs living in the intertidal zone experience periods of internal acidosis when exposed to air (emersion) during low tide. Relative to other marine organisms, molluscs have been identified as vulnerable to future ocean acidification; however, paradoxically it has also been shown that molluscs exposed to high CO 2 environments are more resilient compared with those molluscs naive to CO 2 exposure. Two competing hypotheses were tested using a novel experimental design incorporating tidal simulations to predict the future intertidal limit of oysters in a high-CO 2 world; either high-shore oysters will be more tolerant of elevated P CO2 because of their regular acidosis, or elevated P CO2 will cause high-shore oysters to reach their limit. Sydney rock oysters, Saccostrea glomerata, were collected from the high-intertidal and subtidal areas of the shore and exposed in an orthogonal design to either an intertidal or a subtidal treatment at ambient or elevated P CO2 , and physiological variables were measured. The combined treatment of tidal emersion and elevated P CO2 interacted synergistically to reduce the haemolymph pH ( pH e ) of oysters, and increase the P CO2 in the haemolymph (P e,CO2 ) and standard metabolic rate. Oysters in the intertidal treatment also had lower condition and growth. Oysters showed a high degree of plasticity, and little evidence was found that intertidal oysters were more resilient than subtidal oysters. It is concluded that in a high-CO 2 world the upper vertical limit of oyster distribution on the shore may be reduced. These results suggest that previous studies on intertidal organisms that lacked tidal simulations may have underestimated the effects of elevated P CO2 .

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Section: Condition Indexmentioning

confidence: 51%

Intertidal oysters reach their physiological limit in a future high-CO2 world

Scanes

Parker

O’Connor

et al. 2017

Journal of Experimental Biology

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“…Pleiotropy assessed by genetic correlations in a pedigree and hormone manipulation A second method to assess pleiotropy is to measure a negative genetic correlation between traits in a pedigree (Sinervo, 2000;Svensson et al, 2001) or in controlled crosses Ernande et al, 2004). As noted in the Introduction, negative genetic correlations among phenotypic traits and components of fitness may arise from a pleiotropy.…”

Section: Genetic Methods For Resolving Trade-offsmentioning

confidence: 99%

“…Trade-offs are well studied in many natural systems (Sinervo, 1999;Zera and Harshman, 2000;Reznick et al, 2000;Roff and Fairbairn, 2006). There is however, evidence that life history trade-off geometries are complex and often involve more than the two traits listed above (Ferrière and Clobert, 1992;Sinervo, 1999;Ernande et al, 2004;Miller and Sinervo, 2007). For example, densitydependent competition can alter the form of the egg size-number trade-off that governs progeny survival and recruitment and thereby alter the costs of reproduction trade-off that governs adult reproduction and survival Lancaster et al, 2008).…”

Section: The Genetic Source(s) Of Life History Trade-offsmentioning

confidence: 99%

The role of pleiotropy vs signaller–receiver gene epistasis in life history trade-offs: dissecting the genomic architecture of organismal design in social systems

et al. 2008

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Traditional life history theory ignores trade-offs due to social interactions, yet social systems expand the set of possible trade-offs affecting a species evolution-by introducing asymmetric interactions between the sexes, age classes and invasion of alternative strategies. We outline principles for understanding gene epistasis due to signaller-receiver dynamics, gene interactions between individuals, and impacts on life history trade-offs. Signaller-receiver epistases create trade-offs among multiple correlated traits that affect fitness, and generate multiple fitness optima conditional on frequency of alternative strategies. In such cases, fitness epistasis generated by selection can maintain linkage disequilibrium, even among physically unlinked loci. In reviewing genetic methods for studying life history tradeoffs, we conclude that current artificial selection or gene manipulation experiments focus on pleiotropy. Multi-trait selection experiments, multi-gene engineering methods or multiple endocrine manipulations can test for epistasis and circumvent these limitations. In nature, gene mapping in field pedigrees is required to study social gene epistases and associated trade-offs. Moreover, analyses of correlational selection and frequency-dependent selection are necessary to study epistatic social system trade-offs, which can be achieved with group-structured versions of Price's (1970) equation.

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“…5 year is a genetically different trait than survival to 1 . 5 years (Ernande et al, 2003(Ernande et al, , 2004De´gremont et al, 2007). However, Gjøen et al (1997) studying resistance against a pathogenic bacteria Aeromonas salmonicida in Atlantic salmon, found a strong (0 .…”

Section: (I) Survival Within Fingerling Stagementioning

confidence: 99%

Genetic architecture of rainbow trout survival from egg to adult

Vehviläinen

Kause

Koskinen³

et al. 2010

Genet. Res.

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SummarySurvival from birth to a reproductive adult is a challenge that only robust individuals resistant to a variety of mortality factors will overcome. To assess whether survival traits share genetic architecture throughout the life cycle, we estimated genetic correlations for survival within fingerling stage, and across egg, fingerling and grow-out stages in farmed rainbow trout. Genetic parameters of survival at three life cycle stages were estimated for 249 166 individuals originating from ten year classes of a pedigreed population. Despite being an important fitness component, survival traits harboured significant but modest amount of genetic variation (h 2 =0 . 07-0 . 27). Weak associations between survival during egg-fry and fingerling periods, between early and late fingerling periods (r G =0 . 30) and generally low genetic correlations between fingerling and grow-out survival (mean r G =0 . 06) suggested that life-stage specific survival traits are best regarded as separate traits. However, in the sub-set of data with detailed time of death records, positive genetic correlations between early and late fingerling survival (r G =0 . 89) showed that during certain years the best genotypes in the early period were also among the best in the late period. That survival across fingerling period can be genetically the same, trait was indicated also by only slightly higher heritability (h 2 =0 . 15) estimated with the survival analysis of time to death during fingerling period compared to the analysis treating fingerling survival as a binary character (h 2 =0 . 11). The results imply that (1) inherited resistance against unknown mortality factors exists, but (2) ranking of genotypes changes across life stages.

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Plasticity in resource allocation based life history traits in the Pacific oyster, Crassostrea gigas. I. Spatial variation in food abundance

Cited by 107 publications

References 70 publications

Intertidal oysters reach their physiological limit in a future high-CO2 world

Intertidal oysters reach their physiological limit in a future high-CO2 world

The role of pleiotropy vs signaller–receiver gene epistasis in life history trade-offs: dissecting the genomic architecture of organismal design in social systems

Genetic architecture of rainbow trout survival from egg to adult

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