Effect of maternal growth history on egg number and size in wild white-spotted char (<i>Salvelinus leucomaenis</i>)

Morita, Kentaro; Yamamoto, Shoichiro; Takashima, Yoshinobu; Matsuishi, Takashi; Kanno, Yasuji; Nishimura, Kinya

doi:10.1139/f99-082

Cited by 55 publications

(56 citation statements)

References 25 publications

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“…Crossin et al (2004) reported that egg size was reduced in sockeye populations performing particularly energydemanding migrations, and Braun et al (2013) reported that in years of energetically demanding migration conditions, female sockeye salmon produced smaller eggs for their size than in years when conditions were more benign. Jonsson et al (1996) reported that Atlantic salmon egg size changes with juvenile growth rate, and similar relationships have been reported for some other salmonids (Morita et al 1999, Tamate & Maekawa 2000, but not for brown trout Salmo trutta (Jonsson & Jonsson 1999) or some Pacific salmonids Oncorhynchus spp. (Quinn et al 2004(Quinn et al , 2011.…”

Section: Discussionsupporting

confidence: 63%

Linking embryonic temperature with adult reproductive investment in Atlantic salmon Salmo salar

Jönsson¹,

Jönsson²,

Finstad³

2014

Mar. Ecol. Prog. Ser.

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The expression of fitness-related traits, such as egg and gonad size, often varies among habitats and exhibits clinal variation along climatic and latitudinal gradients. However, the mechanisms allowing such variations are obscure and have been ascribed to both phenotypic plasticity and genetic adaptation. We experimentally tested whether variation in egg and gonad size of a poikilotherm vertebrate is influenced by the temperature individuals experienced during embryogenesis, possibly as an epigenetic effect. Atlantic salmon Salmo salar eggs were incubated under 3 embryonic thermal regimes: cold, mixed and warm treatments. The cold group received ambient river water (mean ± SD: 2.6 ± 0.4°C) and the warm group received water at 4.6°C above ambient temperature, the expected temperature in the river towards the end of this century, from fertilization until exogenous feeding commenced. The mixed group received ambient river water until hatching, whereupon the larvae received heated water until exogenous feeding commenced. When exogenous feeding was initiated, all fish were reared under identical, natural thermal conditions. At adulthood, fish that developed from warm-incubated eggs were largest, had the highest mass−length relationship and developed larger eggs and higher gonad mass relative to their own body size. There was no similar effect of thermal environment during larval development. The treatment did not affect age of maturity or fecundity. Thus, thermal conditions during embryogenesis affected the expression of adult life-history traits, a mechanism by which fish may rapidly change the size of their propagules to the anticipated thermal offspring environment. This is a novel result explaining variation in these core life-history traits.

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Section: Discussionsupporting

confidence: 63%

Linking embryonic temperature with adult reproductive investment in Atlantic salmon Salmo salar

Jönsson¹,

Jönsson²,

Finstad³

2014

Mar. Ecol. Prog. Ser.

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“…However, for many stocks reduced egg sizes for old females may be difficult to observe, presumably because size-selective fishing reduces the likelihood of observing old females (Kamler, 2005). Further, maternal growth rates may affect egg sizes (Morita et al, 1999), but the influence of growth history on egg size is not consistent across species (Quinn et al, 2004). Because of the relationships between maternal characteristics and egg size, changes in average maternal characteristics within a stock may affect mean egg size and have consequences for population dynamics.…”

Section: Introductionmentioning

confidence: 99%

Maternal and stock effects on egg-size variation among walleye Sander vitreus stocks from the Great Lakes region

Wang

Einhouse

Fielder

et al. 2012

Journal of Great Lakes Research

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“…Females probably spend more energy on body growth than males. In this case, larger body means more eggs production and higher fecundity (Morita et al, 1999). On the other hand, males probably spend more energy producing more sperm, in reproductive competition with other males, rather than on growth, as stated by Parker (1982).…”

Section: Discussionmentioning

confidence: 91%

Population structure and reproductive biology of Astyanax gymnodontus (Characiformes: Characidae), a poorly known endemic fish of the Iguaçu River basin, Brazil

Baumgartner

Silva²,

Baumgartner

2016

RBT

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Success in fish breeding depends on reproduction intensity, periodicity and the place where it occurs. Information about fish species reproduction is important to assist managers, and to determine conservation and management strategies. The fish assemblage of the Iguaçu River basin is already known for its high endemism, and despite this privilege, the large number of dams built along it, threat this particular biodiversity. Astyanax gymnodontus is an endemic fish species and studies on its population structure and reproductive biology are important, since they represent the first step for further community studies. Our objective was to evaluate some aspects of the population structure and reproductive biology of A. gymnodontus in the influence area of Salto Santiago dam, Iguaçu River, Paraná State, Brazil. Sampling was made monthly from July 2003 to June 2005, and bimonthly from July 2005 to March 2013, at five sites in the influence area of Salto Santiago dam. Fishes were collected using 10 m length gillnets with meshes ranging from 2.5 to 6.0 cm between non-adjacent knots and trammel nets with inner meshes of 6.0 cm between non-adjacent knots. Nets were arranged on surface, bottom and margins of each site, exposed for 24 h. Additional drags on littoral areas were performed from January to March and October to December from 2009 to 2011, with 50.0 m nets, 0.5 cm mesh size, for juveniles capture. We captured and analyzed 21 932 individuals, being 9 249 females and 12 683 males, representing 42.2 % and 57.8 %, respectively. The average body length was 8.8 cm for females and 8.3 cm for males. The average weight was 18.8 g for females and 16.0 g for males. Sex ratio calculated for the entire period was 1.8 males/female. Males were more abundant than females in 73.2 % of samples and significant differences were observed in 35.3 % of samples. The estimated length at first maturity (SL 50 ) was 6.4 cm for females and 6.2 cm for males. We suggest that sexual differences in body length and weight, and sex ratio occurred as a result of sexual differences in energy allocation. Females spend more energy on body growth, which means more eggs production and higher fecundity. As an integrated response, males spend more energy on sperm production, in competition with other males, leading to a smaller body size. Differences in estimated SL 50 might be an indicator of this sexual difference in energy allocation. The reproduction period was from September to February, with greater intensity at the beginning of this period, and the sites of highest reproductive intensity were those immediate downstream from dams, and therefore with more riverine characteristics. Rev. Biol. Trop. 64 (1): 69-77. Epub 2016 March 01.

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Effect of maternal growth history on egg number and size in wild white-spotted char (Salvelinus leucomaenis)

Cited by 55 publications

References 25 publications

Linking embryonic temperature with adult reproductive investment in Atlantic salmon Salmo salar

Linking embryonic temperature with adult reproductive investment in Atlantic salmon Salmo salar

Maternal and stock effects on egg-size variation among walleye Sander vitreus stocks from the Great Lakes region

Population structure and reproductive biology of Astyanax gymnodontus (Characiformes: Characidae), a poorly known endemic fish of the Iguaçu River basin, Brazil

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