Evidence of genetic and environmental influences on meristic variation in the rainbow trout, Salmo gairdneri Richardson

MacGregor, Robert B.; MacCrimmon, Hugh R.

doi:10.1007/bf00001413

Cited by 25 publications

(5 citation statements)

References 23 publications

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“…Higher variability in pterygiophore counts than vertebral counts is supported in a species of catastomid (Barton and Wilson, 1999). Studies on variation in fishes have reported that fin traits are more variable than vertebral ones in general (Cloutier et al, 2010;Barton and Wilson, 1999;MacGregor and MacCrimmon, 1977). Median fins rely on the same positioning cues as the vertebral column early in development (Freitas et al, 2006) and later in development articulate with the neural and haemal spines (Figure 2) (Bird and Mabee, 2003).…”

Section: Discussionmentioning

confidence: 95%

Intraspecific variation in fossil vertebrate populations: Fossil killifishes (Actinopterygii: Cyprinodontiformes) from the Oligocene of Central Europe

Frey

Maxwell

Sánchez‐Villagra

2016

Palaeontologia Electronica

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A quantification of intraspecific variation in morphological traits is necessary not only as a basis for taxonomic work but also to understand a basic aspect of evolution. Comparisons among species could reveal differences in plasticity in development among them and even give clues on evolvability. Studies of this kind are rare for extinct species of vertebrates given the lack of adequate samples, but there are notable exceptions. Morphometric and meristic data were collected for three species of fossil killifish in order to quantify intraspecific variation: 67 specimens of Prolebias rhenanus from the Lower Oligocene of Baden-Württemberg, 40 specimens of Pr. stenoura from the Lower Oligocene of Puy-de-Dôme, and 141 specimens of Paralebias cephalotes from the Upper Oligocene of Aix-en-Provence. Nearly identical patterns of intraspecific variation exist between the two species of Prolebias. Fin base lengths and precaudal lengths of the vertebral column are the most variable traits in both species, followed by pterygiophore counts, then other axial length measurements and, least variable, vertebral counts. In neither species was there a significant difference in observed variation between fin and vertebral or meristic and morphometric traits. The only significant correlation shared between the two species is the positive relationship between caudal length of the vertebral column and length of the anal fin base. Precaudal length of the vertebral column is less variable in Paralebias than in Prolebias, while precaudal vertebral count is more variable, in absolute values of the coefficient of variation. Variability in elongation of precaudal vertebrae may be the underlying cause of the absence of correlation between decreased variation in precaudal length of the vertebral column and increased variation in precaudal count in Paralebias cephalotes. We report more similar patterns of variation among Prolebias congeners than between Prolebias and Paralebias, suggesting that trait variability is changing over evolutionary time in this actinopterygian lineage.

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Section: Discussionmentioning

confidence: 95%

Intraspecific variation in fossil vertebrate populations: Fossil killifishes (Actinopterygii: Cyprinodontiformes) from the Oligocene of Central Europe

Frey

Maxwell

Sánchez‐Villagra

2016

Palaeontologia Electronica

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“…Barlow 1961, Garside 1966, Kwain 1975, MacGregor & MacCrimmon 1977. In addition to environmental influences, Leary et al (1984) have reported that genetic modification of developmental rate may also affect meristic variation.…”

Section: Discussionmentioning

confidence: 99%

“…Leary et al (1985b) have reported the relatively high narrow sense heritabilities of 0.67, 0.37, 0.84, and 0.52 for UGR, LGR, PEL, and PECT, respectively in the Arlee strain of rainbow trout. Furthermore, MacGregor & MacCrimmon (1977) have argued that differences in meristic counts among groups of rainbow trout raised in a common environment is evidence of at least partial genetic control of these characters in this species.…”

Section: Discussionmentioning

confidence: 99%

Deviation from morphological intermediacy in interstrain hybrids of rainbow trout, Salmo gairdneri

Ferguson

Danzmann

1987

Environ Biol Fish

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“…In the past, some information on the meristic character count of wild sharpsnout seabream was reported by Bini (1968), Tortonese (1975), Whitehead, Bauchot, Hureau, Nielsen & Tortonese (1986) and Fischer, Schneider & Bauchot (1987). Body malformations may be caused by environmental factors (biotic and abiotic factors; Paperna 1978; Sloof 1982; Treasurer 1992) and are often determined in the first stage of development (MacGregor & MacCrimmon 1977).…”

Section: Explanation Of the Key Used For The Anomalies Of The Wild Amentioning

confidence: 99%

Meristic variation and skeletal anomalies of wild and reared sharpsnout seabream juveniles (Diplodus puntazzo , Cetti 1777) off coastal Sicily, Mediterranean Sea

Favaloro

Mazzola

2003

Aquaculture Research

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Evidence of genetic and environmental influences on meristic variation in the rainbow trout, Salmo gairdneri Richardson

Cited by 25 publications

References 23 publications

Intraspecific variation in fossil vertebrate populations: Fossil killifishes (Actinopterygii: Cyprinodontiformes) from the Oligocene of Central Europe

Intraspecific variation in fossil vertebrate populations: Fossil killifishes (Actinopterygii: Cyprinodontiformes) from the Oligocene of Central Europe

Deviation from morphological intermediacy in interstrain hybrids of rainbow trout, Salmo gairdneri

Meristic variation and skeletal anomalies of wild and reared sharpsnout seabream juveniles (Diplodus puntazzo , Cetti 1777) off coastal Sicily, Mediterranean Sea

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