The critical swimming velocity of diploid and triploid brook trout

Stillwell, Evelyn J.; Benfey, Tillmann J.

doi:10.1111/j.1095-8649.1997.tb01520.x

Cited by 16 publications

(3 citation statements)

References 15 publications

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“…Other experiments about the critical swimming speed used as indicator of aerobic capacities have evidenced a similar lack of triploidy‐induced effect (Small and Randall 1989; Sezaki et al. 1991; Parsons 1993; Stillwell and Benfey 1996, 1997; Altamiras et al. 2002).…”

Section: Environmental Tolerancementioning

confidence: 57%

The physiology of triploid fish: current knowledge and comparisons with diploid fish

2008

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This paper is aimed at underlining the limited knowledge available about the physiology of triploid fishes compared with diploids. Whereas many aspects (induction, detection, growth, resistance to diseases, etc.) in the production and rearing of triploid fishes have widely been developed and described in the literature, other numerous questions of ecophysiology remain in abeyance, and the study of triploid cells physiology is still in its infancy. Triploid fishes can be considered as models worthwhile for physiological investigations not only for the economical stake in relation to the development of triploid fishes rearing, but also for the cytological and molecular features of their tissues and organs. The functional implications of these features have been poorly studied although they are potential areas of applied and/or fundamental studies.

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Section: Environmental Tolerancementioning

confidence: 57%

The physiology of triploid fish: current knowledge and comparisons with diploid fish

2008

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“…Measurements of aerobic capacity revealed no deficiency in triploid salmonids (Ojolick et al, 1995;Stillwell and Benfey, 1997), and tests on exhaustive exercise in brook trout, Salvelinus fontinalis, triploids showed that aerobic and anaerobic capacities of triploids were only compromised relative to diploids at high temperatures (Hyndman et al, 2003a(Hyndman et al, , 2003b. Further, forced swimming in triploid Atlantic salmon demonstrated no difference in their aerobic capacity compared with diploids, but anaerobic capabilities were affected (Cotterell and Wardle, 2004).…”

Section: Fishmentioning

confidence: 98%

“…Sub-optimal rearing conditions can lead to poorer performances of triploids. Examples include defective adjustment to seawater culture in salmonids (Johnson et al, 1986;Quillet et al, 1987;Quillet and Gaignon, 1990;Galbreath and Thorgaard, 1995;Ojolick et al, 1995;Chevassus, 1998;Bonnet et al, 1999), high rearing temperatures in rainbow trout (Ojolick et al, 1995), grow out at high stocking density and communal culture in grass carp (Cassani and Caton, 1986) and low level of dissolved oxygen in salmonids (Quillet at al, 1987;Quillet and Gaignon, 1990;Johnstone et al, 1991;Ojolick et al, 1995;Stillwell and Benfey, 1997;Bernier et al, 2004) and European sea bass (J.-C.…”

Section: Fishmentioning

confidence: 99%

Polyploid fish and shellfish: Production, biology and applications to aquaculture for performance improvement and genetic containment

et al. 2009

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Polyploids can be defined as organisms with one or more additional chromosome sets with respect to the number most frequently found in nature for a given species. Triploids, organisms with three sets of homologous chromosomes, are found spontaneously in both wild and cultured populations and can be easily induced in many commercially relevant species of fish and shellfish. The major consequence of triploidy is gonadal sterility, which is of advantage in the aquaculture of molluscs since it can result in superior growth. In fish, the induction of triploidy is mainly used to avoid problems associated with sexual maturation such as lower growth rates, increased incidence of diseases and deterioration of the organoleptic properties. Triploidy can also be used to increase the viability of some hybrids, and is regarded as a potential method for the genetic containment of farmed shellfish and fish. This review focuses on some current issues related to the application of induced polyploidy in aquaculture, namely: 1) the artificial induction of polyploidy and the effectiveness of current triploidisation techniques, including the applicability of tetraploidy to generate auto-and allotriploids; 2) the performance capacity of triploids with respect to diploids; 3) the degree and permanence of gonadal sterility in triploids; and 4) the prospects for the potential future generalised use of triploids to avoid the genetic impact of escapees of farmed fish and shellfish on wild populations. Finally, directions for future research on triploids and their implementation are discussed.

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Thermal Tolerance of Diploid Versus Triploid Rainbow Trout and Brook Trout Assessed by Time to Chronic Lethal Maximum

et al. 2006

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SynopsisAn effect of ploidy on thermal tolerance in juvenile trout was assessed in a series of tests comparing time to chronic lethal maximum (CLMax). Diploid and triploid fish were produced from a common spawn for three different groups each of brook trout Salvelinus fontinalis and of rainbow trout Oncorhynchus mykiss. One or two CLMax tests were performed per group, on between 15 and 50 individuals per ploidy within groups. The tests involved exposure of fish to a progressive 2°C day )1 water temperature increase and recording of the time at which each individual fish reached loss of equilibrium (LE). The time to LE data were rank transformed and analyzed as a randomized complete block design. Although relative performance varied among trials, the analysis indicated overall differences due to ploidy were small and nonsignificant among both brook trout and rainbow trout. Size proved to be significantly correlated with time to LE in the brook trout trials, but not in the rainbow trout trials. Two of the six groups included a large proportion of fish which had received a heat shock following fertilization, but were not successfully triploidized. In both cases, thermal tolerance of the heat-shocked diploids was similar to that of the non-heat shocked control diploids, indicating no persistent effect of the heat shock on thermal tolerance.

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The critical swimming velocity of diploid and triploid brook trout

Abstract: No significant difference was found in the critical swimming velocity of diploid and triploid brook trout Salvelinus fontinalis, suggesting that the triploid state is not associated with a reduced aerobic capacity. 1997 The Fisheries Society of the British Isles

Cited by 16 publications

References 15 publications

The physiology of triploid fish: current knowledge and comparisons with diploid fish

The physiology of triploid fish: current knowledge and comparisons with diploid fish

Polyploid fish and shellfish: Production, biology and applications to aquaculture for performance improvement and genetic containment

Thermal Tolerance of Diploid Versus Triploid Rainbow Trout and Brook Trout Assessed by Time to Chronic Lethal Maximum

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