Sensitive Periods for the Influence of the Hydric Environment on Eggs and Hatchlings of Painted Turtles (Chrysemys picta)

Gutzke, William H. N.; Packard, Gary C.

doi:10.1086/physzool.59.3.30156105

Cited by 49 publications

(80 citation statements)

References 7 publications

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“…First, in turtles, incubation at lower constant temperatures is associated with a greater incorporation of yolk nutrients into hatchling tissues (Gutzke et al, 1987;Booth et al, 2004). Accordingly, the observed elevations in TAC following lowtemperature incubation may be reflective of a greater deposition of unused maternally derived yolk antioxidants into hatchling liver tissue.…”

Section: Discussionmentioning

confidence: 99%

Temperature experienced during incubation affects antioxidant capacity but not oxidative damage in hatchling red-eared slider turtles (Trachemys scripta elegans)

Treidel

Carter

Bowden

2015

Journal of Experimental Biology

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Our understanding of how oxidative stress resistance phenotypes are affected by the developmental environment is limited. One component of the developmental environment, which is likely central to early life oxidative stress among ectothermic and oviparous species, is that of temperature. We investigated how incubation temperature manipulations affect oxidative damage and total antioxidant capacity (TAC) in red-eared slider turtle (Trachemys scripta elegans) hatchlings. First, to determine whether temperature fluctuations elicit oxidative stress, eggs from clutches were randomly assigned to either a constant (29.5°C) or daily fluctuating temperature incubation (28.7±3°C) treatment. Second, to assess the effect of temperature fluctuation frequency on oxidative stress, eggs were incubated in one of three fluctuating incubation regimes: 28.7±3°C fluctuations every 12 h (hyper), 24 h (normal) or 48 h (hypo). Third, we tested the influence of average incubation temperature by incubating eggs in a daily fluctuating incubation temperature regime with a mean temperature of 26.5°C (low), 27.1°C (medium) or 27.7°C (high). Although the accumulation of oxidative damage in hatchlings was unaffected by any thermal manipulation, TAC was affected by both temperature fluctuation frequency and average incubation temperature. Individuals incubated with a low frequency of temperature fluctuations had reduced TAC, while incubation at a lower average temperature was associated with enhanced TAC. These results indicate that although sufficient to prevent oxidative damage, TAC is influenced by developmental thermal environments, potentially because of temperature-mediated changes in metabolic rate. The observed differences in TAC may have important future consequences for hatchling fitness and overwinter survival.

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Section: Discussionmentioning

confidence: 99%

Temperature experienced during incubation affects antioxidant capacity but not oxidative damage in hatchling red-eared slider turtles (Trachemys scripta elegans)

Treidel

Carter

Bowden

2015

Journal of Experimental Biology

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“…Under those circumstances, parental ability to bias sex ratios accordingly is also favored. Survival Differential mortality Burger and Zappalorti 1988Janzen 1995Rhen and Lang 1995Bobyn and Brooks 1994Elphick and Shine 1999Gutzke and Packard 1987aJoanen et al 1987 Fecundity Sexual size dimorphism Head et al 1987Allsteadt and Lang 1995aAllsteadt and Lang 1995aBobyn and Brooks 1994Webb et al 1987 Phenotypic effects Allsteadt and Lang 1995aArnold et al 1995Braña and Ji 2000 Crews et al 1998 Bull and Charnov 1989Demuth 2001Gutzke and Crews 1988Packard and Packard 2001Elphick and Shine 1999Rhen and Lang 1999bGutzke et al 1987…”

Section: Adaptive Hypothesesmentioning

confidence: 99%

“…Ewert et al 1994 Tousignant and Crews 1995Ferguson and Joanen 1983Gutzke and Packard 1987aGutzke et al 1987Harlow and Shine 1999Hutton 1987Joanen et al 1987McKnight and Gutzke 1993O'Steen 1998Packard et al 1987Webb and Cooper-Preston 1989 Seasonal hatching time Kynard 1981 Conover andKynard 1981 Harlow and Taylor 2000 Acknowledgments-Many thanks to Claude Pieau, Mike Ewert, Carrie Morjan, Rachel Bowden, and Dean Adams for their insightful criticisms and suggestions on this manuscript.…”

mentioning

confidence: 98%

Temperature-Dependent Sex Determination in Vertebrates

Valenzuela¹,

Lance²

2018

Open Monographs

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“…Segundo Gutzke & Packard (1986), no ambiente úmido os ovos absorvem água e no ambiente seco eles se desidratam. Com isso os ovos do ambiente úmido geram filhotes maiores que aqueles do ambiente seco.…”

Section: Influência Do Período De Desova Na Embriogêneseunclassified

“…O desenvolvimento dos embriões de tartaruga de ovos de casca flexível e porosa foi profundamente afetado pelo ambiente hídrico do local da desova da incubação (Gutzke & Packard, 1986;Packard & Packard 1988), mas os ovos de casca rígida pouco permeável mostram menor influência da umidade (Packard et al, 1981;Gettinger et al, 1984;Ferreira Júnior et al, 2007). O sucesso da eclosão variou mais entre espécies de casca flexível (C. picta) do que entre aqueles de casca rígida (C. serpentina) indicando que as trocas de água foi um fator que limitou a sobrevivência dos embriões.…”

Section: Localização Dos Ninhosunclassified

Efeitos de Fatores Ambientais na Reprodução de Tartarugas

Júnior

2009

Acta Amaz.

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ResumoPara as espécies de tartaruga que apresentam a determinação sexual dependente da temperatura da incubação o local e o momento da desova, exercem influências que vão além da definição do sexo dos embriões. A influência do local da desova se estende a todo o desenvolvimento embrionário afetando o comportamento e o tamanho dos filhotes. O momento em que ocorre a desova trará conseqüências ao ambiente térmico dos ninhos à medida que a temperatura e a umidade variam ao longo do ano. A umidade será decisiva nas trocas hídricas e gasosas entre os ovos e o meio afetando a absorção do vitelo e o crescimento dos embriões. As cheias e os alagamentos são importantes fatores de perda de ninhos nas espécies de tartaruga de água doce. A desova no momento adequado possibilita uma incubação segura, sem a interferência de alagamentos dos ninhos e conseqüente morte dos embriões. A predação dos ninhos varia de acordo com o local da desova, o tipo e a abundância de predadores e a profundidade da câmara de ovos. A escolha de pontos de desova no interior da vegetação, onde a taxa de predação é geralmente menor, nem sempre é a estratégia mais frequentemente adotada pelas tartarugas, uma vez que esse procedimento pode levar a uma maior exposição das fêmeas aos predadores, à diminuição do sucesso da eclosão ou a alterações na razão sexual provocadas por diferenças na temperatura da incubação.PalavRas-chave: quelônios, nidificação, embriogênese, predação, eclosão. Environmental factors effects in turtles reproduction AbstrActTurtle species in which the sex determination is dependent of incubation temperature, the nest site and the laying moment will affect more than embryo sex determination. The influence of the laying site extends all over the embryonic development, affecting hatching weight and size. The time of the egg-laying will bring consequences to the nest thermal environment, as the temperature and humidity change throughout the year. The humidity will be decisive in gaseous and hydric exchanges between eggs and the environment, affecting yolk absorption and embryo growth. Floods and inundation are important factors related to nest loss in freshwater turtle species. Egg laying at the appropriated time makes a safe incubation possible, without the interference of nest inundation and subsequent embryo death. The nest predation varies according to the egg-laying site, type and abundance of predator and nest depth. The choice of areas in the middle of vegetation, where the predation rate is generally smaller, is not always the most used strategy by turtles, since this procedure can decrease the hatching success or provoke changes in sex ratio.

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Sensitive Periods for the Influence of the Hydric Environment on Eggs and Hatchlings of Painted Turtles (Chrysemys picta)

Cited by 49 publications

References 7 publications

Temperature experienced during incubation affects antioxidant capacity but not oxidative damage in hatchling red-eared slider turtles (Trachemys scripta elegans)

Temperature experienced during incubation affects antioxidant capacity but not oxidative damage in hatchling red-eared slider turtles (Trachemys scripta elegans)

Temperature-Dependent Sex Determination in Vertebrates

Efeitos de Fatores Ambientais na Reprodução de Tartarugas

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