Management implications of genetic differentiation between native and hatchery populations of brown trout (Salmo trutta) in Spain

García‐Marín, José‐Luis; Jorde, Per Erik; Ryman, Nils; Utter, Fred M.; Plá, Carles

doi:10.1016/0044-8486(91)90090-t

Cited by 101 publications

(94 citation statements)

References 18 publications

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“…As summarized in Table 4, the allelic distributions in these 48 additional locations are typical of those from unstocked areas selected for this study, but with evidence of varying degrees of interbreeding with hatchery populations of German (presumably Rhenish) origin (García-Marín et al, 1991). Particularly noteworthy is the lower overall frequency of the LDH-C*90 allele in the Black Sea (Danube) and Mediterranean rivers, drainages where this allele is absent or at a low frequency in populations selected for this study.…”

Section: Additional Studiesmentioning

confidence: 93%

Postglacial colonization of brown trout in Europe based on distribution of allozyme variants

1999

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Compatible data from 11 polymorphic allozyme loci were assembled from 14 published studies and additional unpublished information for 232 native collections of brown trout sampled over a broad geographical range. Most of the genetic variation was explained by the distribution of allelic variation at the LDH-C* and CK-A1* loci. Patterns of geographical distribution coupled with postglacial geological events supported a model of colonization from three preglacial lineages, each fixed for different sets of alleles at these two loci. During glacial retreat, recolonization is proposed to have occurred mainly into adjacent areas through (i) a northwestern migration from an eastern Mediterranean-Caspian refuge, (ii) a northern expansion from a refuge in Atlantic drainages of Iberia and southern France, and (iii) a northern and eastern radiation from a refuge centred near the English Channel. Extant populations in deglaciated areas are suggested to represent mixed or pure descendants of these migrating groups. Repopulation from a fourth Mediterranean refuge distinguished by the presence of the LDH-A2*100QL allele was excluded based on the absence of this allele in repopulated areas.

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Section: Additional Studiesmentioning

confidence: 93%

Postglacial colonization of brown trout in Europe based on distribution of allozyme variants

1999

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“…Tissue extraction, electrophoresis and procedures for visualizing proteins generally followed the methods of Aebersold et al (1987) with minor modifications (García-Marín et al, 1991). The electrophoresis was carried out in 11% starch horizontal gels.…”

Section: Methodsmentioning

confidence: 99%

Genetic homogeneity of dolphinfish (<i>Coryphaena hippurus</i>) in the western Mediterranean and the eastern Atlantic

Plá¹,

Pujolar²

1999

Sci. Mar.

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SUMMARY: Dolphinfish (Coryphaena hippurus) is an epipelagic, highly migratory species distributed worldwide in tropical and temperate waters including the Mediterranean Sea. Protein electrophoresis analyses can provide knowledge of the genetic population structure of the species and therefore be used as a tool for fishery management. Areas sampled include the islands of Majorca and Sicily in the western Mediterranean and the Canary Islands in the eastern Atlantic. The results of the protein electrophoresis reveal a level of genetic variability similar to other highly migratory species. No differences were found among locations, and it was not possible to reject the null hypothesis of one panmictic population in the area studied.

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“…Al comparar estos valores de diferenciación genética con aquellos informados para poblaciones localizadas en su zona de distribución nativa que corresponde a Europa ( Fig. 1) (Garcia-Marin et al, 1991;Presa et al, 1994;Apostolidis et al, 1996), se observa que las poblaciones de trucha café en Chile son altamente homogéneas, aunque dentro de ellas existe un alto grado de variación genética. Estos resultados sugieren que la trucha café tiene una composición genética más bien mixta, que puede haberse originado antes o durante su proceso de introducción en el país.…”

Section: Origen Y Características Genéticasunclassified

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

Colihueque¹

2015

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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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Management implications of genetic differentiation between native and hatchery populations of brown trout (Salmo trutta) in Spain

Cited by 101 publications

References 18 publications

Postglacial colonization of brown trout in Europe based on distribution of allozyme variants

Postglacial colonization of brown trout in Europe based on distribution of allozyme variants

Genetic homogeneity of dolphinfish (<i>Coryphaena hippurus</i>) in the western Mediterranean and the eastern Atlantic

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

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