Effects of egg size on offspring development and fitness in brown trout, Salmo trutta L.

Ojanguren, Alfredo F.; Reyes-Gavilán, Felipe G.; Braña, F.

doi:10.1016/s0044-8486(96)01398-1

Cited by 78 publications

(71 citation statements)

References 45 publications

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“…The presence of positive correlations between female size and egg size, and between egg size and early offspring size, has been well documented in salmonids (Beacham et al, 1985;Ojanguren et al, 1996). Between the wild and domesticated populations used in the present study, large differences in maternal body size existed (see also Fraser et al, 2010).…”

Section: Maternal Traitssupporting

confidence: 54%

Multigenerational hybridisation and its consequences for maternal effects in Atlantic salmon

et al. 2013

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Outbreeding between segregating populations can be important from an evolutionary, conservation and economical-agricultural perspective. Whether and how outbreeding influences maternal effects in wild populations has rarely been studied, despite both the prominent maternal influence on early offspring survival and the known presence of fitness effects resulting from outbreeding in many taxa. We studied several traits during the yolk-feeding stage in multigenerational crosses between a wild and a domesticated Atlantic salmon (Salmo salar) population up to their third-generation hybrid in a common laboratory environment. Using cross-means analysis, we inferred that maternal additive outbreeding effects underlie most offspring traits but that yolk mass also underlies maternal dominant effects. As a consequence of the interplay between additive and dominant maternally controlled traits, offspring from first-generation hybrid mothers expressed an excessive proportion of residual yolk mass, relative to total mass, at the time of first feeding. Their residual yolk mass was 23-97% greater than those of other crosses and 31% more than that predicted by a purely additive model. Offspring additive, epistatic and epistatic offspring-bymaternal outbreeding effects appeared to further modify this largely maternally controlled cross-means pattern, resulting in an increase in offspring size with the percentage of domesticated alleles. Fitness implications remain elusive because of unknown phenotype-by-environment interactions. However, these results suggest how mechanistically co-adapted genetic maternal control on early offspring development can be disrupted by the effects of combining alleles from divergent populations. Complex outbreeding effects at both the maternal and offspring levels make the prediction of hybrid phenotypes difficult.

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Section: Maternal Traitssupporting

confidence: 54%

Multigenerational hybridisation and its consequences for maternal effects in Atlantic salmon

et al. 2013

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“…Stronger relationships with the standard length were found for the farmed fish and correlations for the spawner weight were similar for both populations. Similar relationships of the reproductive parameters with the size of brood fish have been found by many authors (MCFADDEN et al, 1965;BAGENAL, 1969;OJANGUREN et al, 1996;L´ABÉE-LUND and HINDAR, 1990;LOBON-CERVIA et al, 1997).…”

Section: Discussionsupporting

confidence: 87%

Effect of Culture Conditions on Reproductive Traits of Brown Trout Salmo Trutta L.

Randák¹,

Kocour²,

Žlábek³

et al. 2006

Bull. Fr. Pêche Piscic.

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Progeny from artificial propagation of wild brown trout (Salmo trutta L.) of the Blanice river, Czech Republic, were farmed to maturity and spawned at ages three, four and five during [2002][2003][2004]. Reproductive parameters and biological quality of eggs in this farmed population were compared to those of the original wild population. ANCOVA showed no differences between wild and farmed fish in weight of eggs per female, total fecundity, or relative fecundity in any year. Significantly higher egg diameter (4.57 mm, P = 0.001) and weight (69.3 mg, P = 0.0375) were found in the wild population in 2002 and conversely in 2004, the mean egg weight was higher in the farmed population (94.7 mg, P = 0.0021). Differences in egg diameter in this year (4.64 ± 0.06 and 4.82 ± 0.06 in wild and farmed trout, respectively) were close to the level of significance (P = 0.079). Mutual correlations between length or weight and studied reproductive traits were similar in both populations. Fertilization rate, duration of incubation period, egg losses during incubation and mortality of starving hatched fry were monitored in embryos and larvae of farmed population only (FxF), crosses between farmed females and wild males (FxW) and wild population only (WxW). Altogether 6.3%, 5.8% and 5.4% of eggs died during incubation period in FxF, FxW and WxW, respectively. There were also no significant differences in duration of incubation period and mortality of starving fry. It can be concluded that farming conditions did not significantly affect the reproductive parameters and quality of eggs in the first generation of farmed broodstock. Key-words:Wild, farmed, reproduction, fecundity, fry, mortality, starvation, Salmo trutta. EFFET DES CONDITIONS D'ÉLEVAGE SUR LES CARACTÉRISTIQUES

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“…La evidencia obtenida mediante experimentos de laboratorio, utilizando ejemplares silvestres de trucha café, indican que esta situación ocurriría efectivamente en esta especie, ya que los peces se alimentan a una tasa más alta cuando están en contacto visual y olfativo con otros ejemplares en comparación a cuando están en aislamiento (Sundstrom & Jonhsson, 2001). Asimismo, otros estudios de laboratorio también indican que la competencia aumenta la tasa de crecimiento en trucha café pero en función del parentesco, dado que ejemplares sin parentesco criados en un ambiente común muestran un mejor desempeño en comparación a cuando son hermanos (Ojarguren et al, 1996). Finalmente, existe evidencia obtenida de experimentos con ejemplares triploides de trucha café (Colihueque & Álvarez, 2005), que también es concordante con la importancia de la altura de la columna de agua y el flujo de agua, puesto que la alteración de estas variables afectan el crecimiento y sobrevivencia en la etapa de alevín.…”

Section: Rendimiento Productivo Bajo Condiciones De Cultivo Intensivounclassified

Cultivo de la trucha cafe anadroma: una nueva alternativa para la diversificacion de la salmonicultura nacional

Colihueque¹

2015

lajar

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RESUMEN.Con el propósito de aportar información para contribuir al desarrollo del cultivo de la trucha café anádroma (Salmo trutta trutta) en Chile, también llamada seatrout, en este trabajo se revisan los siguientes aspectos: i) características genéticas y origen evolutivo de la trucha café naturalizada existente en el país, ii) rendimiento reproductivo bajo condiciones de cautiverio, and iii) eficiencia del proceso de esmoltificación, tasa de crecimiento y maduración sexual en agua dulce y agua de mar de la trucha café anádroma. Estos últimos parámetros son particularmente relevantes para una apropiada evaluación de su desempeño bajo condiciones de cultivo intensivo. El análisis de estos aspectos indica que las poblaciones naturalizadas de trucha café en Chile presentan un alto grado de variación genética, junto con un probable origen único (línea filogenética Atlántica, norte de Europa); éstas también presentan un rendimiento reproductivo óptimo, que excede aquel observado en otros salmónidos. Además, el proceso de esmoltificación de la trucha café anádroma es equivalente al observado en salmónidos totalmente anádromos, como el salmón del Atlántico y el salmón coho. Asimismo, con excepción de la maduración precoz, que es más alta que en el salmón del Atlántico, sobre todo en los machos, esta variedad también muestra una favorable tasa de crecimiento y sobrevivencia en agua de mar. Todos estos antecedentes indican que el cultivo de la trucha café anádroma es una alternativa interesante, con potencial para ser incorporada en la salmonicultura nacional. Palabras clave: Salmo trutta trutta, trucha café, variabilidad genética, cultivo, rendimiento, acuicultura. Anadromous brown trout farming: a new alternative for the diversification of the national salmon farmingABSTRACT. In order to provide information which will contribute to the development of anadromous brown trout (Salmo trutta trutta) farming in Chile, also called seatrout, this study reviews the following aspects: i) the genetic characteristics and the evolutionary origins of the naturalized populations of brown trout distributed in our country, ii) their reproductive performance under conditions of captivity, and iii) the efficiency of smoltification process, growth rate and sexual maturation in freshwater and seawater for the anadromous brown trout. These latter parameters are particularly relevant for an appropriate evaluation of their performance under intensive culture conditions. The analysis of these issues indicates that naturalized populations of brown trout in Chile have a high degree of genetic variation, along with a probable single origin (Atlantic phylogenetic lineage, northern Europe); they also exhibit optimal reproductive performance, exceeding that observed in other farmed salmonids. Moreover, the smoltification process of the anadromous brown trout is equivalent to that of fully anadromous salmonids, such as Atlantic salmon and coho salmon. With the exception of early maturation, which is higher than in the Atlantic salmon, especially in...

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Effects of egg size on offspring development and fitness in brown trout, Salmo trutta L.

Cited by 78 publications

References 45 publications

Multigenerational hybridisation and its consequences for maternal effects in Atlantic salmon

Multigenerational hybridisation and its consequences for maternal effects in Atlantic salmon

Effect of Culture Conditions on Reproductive Traits of Brown Trout Salmo Trutta L.

Cultivo de la trucha cafe anadroma: una nueva alternativa para la diversificacion de la salmonicultura nacional

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