Coupling body weight and its composition: a quantitative genetic analysis in rainbow trout

Kause, Antti; Ritola, Ossi; Paananen, Tuija; Mäntysaari, Esa; Eskelinen, Unto

doi:10.1016/s0044-8486(01)00884-5

Cited by 107 publications

(96 citation statements)

References 31 publications

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“…2) resulted in the redder and more yellow colour appearance of the fillets (JOHNSTON et al, 2000;DILER et al, 2004). The results of the fillet composition analysis with a higher fat and protein concentration in the older rainbow trout are in accordance with other investigations in fish (KAUSE et al, 2002;BJOERNEVIK et al, 2004). A reason for this age-related increase in the proximate parameters fat and protein might be the change from mainly active-growing to passive-maintenance metabolism influenced by reduced motility and inadequate feeding of the animals.…”

Section: Resultssupporting

confidence: 88%

“…However, the increase in the nutrient content is a positive effect considering the nutritional value of the fish fillets especially after processing. With regard to the ploidy status of the trout the lower fat and partly reduced protein concentration in the fillets of the triploid fish contradicts the results by KAUSE et al (2002) who presented a relationship between fillet weight and its fat and protein concentration. It could be suggested that the increased hypertrophy in the T is mainly related to higher water accumulation in the muscle tissue accompanied with a general reduction in the dry matter and especially the fat and partly the protein concentration.…”

Section: Resultscontrasting

confidence: 58%

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Flesh characteristics of pan-size triploid and diploid rainbow trout (<i>Oncorhynchus mykiss</i>) reared in a commercial fish farm

et al. 2008

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Flesh characteristics of pan-size triploid and diploid rainbow trout (Oncorhynchus mykiss) reared in a commercial fish farm AbstractSexual maturation of rainbow trout during production has a negative effect on the slaughter yields and flesh quality. Induction of triploidy is a method to prevent the development of fertile trout. In many investigations sexually mature triploid and diploid rainbow trout had been compared. In the present study the slaughter characteristics and flesh quality of female immature diploid and triploid rainbow trout reared up to 66 and 75 weeks (pan-size-format) were compared. Considering the age the old fish had significantly higher body and fillet weights accompanied with larger muscle fibres. The fillets of the old trout were brighter and redder, had a reduced water-holding capacity (WHC) and contained more fat and protein. With regard to the ploidy status the triploid trout had higher body and fillet weights and larger muscle fibres. The fillets of the triploid fish were brighter, had a reduced WHC and lower fat contents. With regard to the age-ploidy status interaction the young and old triploid trout had better growth characteristics but the WHC and the fillet fat concentration was reduced in these animals. The colour values were inconsistent. The pH and electrical conductivity values indicated no higher pre-or peri-mortal stress and/or different stress susceptibility of the investigated young as well as old triploid and diploid trout. In conclusion, it could be suggested that induction of triploidy positively influences body and fillet development mainly by muscle fibre hypertrophy, but the triploid fillets showed slightly worse flesh characteristics (Brightness, WHC).

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Section: Resultssupporting

confidence: 88%

Section: Resultscontrasting

confidence: 58%

Flesh characteristics of pan-size triploid and diploid rainbow trout (<i>Oncorhynchus mykiss</i>) reared in a commercial fish farm

et al. 2008

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“…Growth rate is usually of primary interest in those programs, as development of fast growing strains via selective breeding would allow lowering production costs significantly by reducing the duration of the rearing cycle. Carcass processing traits and body composition traits also are essential ingredients of economic profitableness as they influence the yield of final product, its quality, and its acceptance by the consumer (Neira et al 2004;Kause et al 2002). For example, fillet yield and gutted yield are primary components of economic gain when fish are marketed as pan 106 E. Saillant et al: Aquat.…”

Section: Introductionmentioning

confidence: 99%

Genetic variation for carcass quality traits in cultured sea bass (Dicentrarchus labrax)

Saillant

Dupont‐Nivet

Sabourault

et al. 2009

Aquat. Living Resour.

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-Genetic parameters for carcass quality traits were estimated in 27 families of sea bass (3 dams × 9 sires factorial mating design), raised mixed in the same tanks starting before hatching. Offspring parentage was determined a posteriori using 6 microsatellite loci. Carcass quality traits were recorded at 818 days post fertilization (mean standard length: 32.6 ± 3.1 cm). Genetic parameters were estimated from the sire half sib variance and covariance components. Heritability of body weight (BW) and carcass processing traits (standardized to body weight) percent head weight (Head%), percent viscera weight (Viscera%) and percent visceral fat weight (VisceFat%) were relatively high ranging from 0.48 ± 0.15 (Viscera%) to 0.87 ± 0.23 (Head%); the estimate of heritability for fillet yield (Fillet%) was lower (0.25 ± 0.10) but was significantly greater than zero. Body weight was positively correlated to Fillet%, Viscera%, and VisceFat%, and negatively correlated to Head%. These results indicate that these carcass processing traits can be modified by directional selection and that selection for greater BW would lead to an increase of Fillet%, Viscera% and VisceFat% and a decrease of Head%. Muscle lipid content (MuscleLipid%) was determined using two indirect methods: measurements with a Torry Fish Fatmeter (TorryLipid) and determination of the percentage of dry matter content (MuscleDry%) via desiccation. Both measures were highly correlated to chemical measurements of MuscleLipid%. Regression analysis indicated a superior predictive value of TorryLipid suggesting that MuscleLipid% may be evaluated via rapid, non lethal measurements with a Torry Fish Fatmeter. Heritability estimates of TorryLipid and MuscleDry% differed significantly from zero (TorryLipid: 0.28± 0.12, MuscleDry%: 0.36± 0.14) indicating that MuscleLipid% could be lowered by directional selection. TorryLipid and MuscleDry% were weakly correlated to body weight and carcass processing traits suggesting that simultaneous improvement of MuscleLipid% and other carcass quality traits may require definition of multi-trait selection indices.

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“…These methods include correlation analysis, path analysis, and regression analysis. To date, studies of phenotypic and genetic relationships among growth-related traits have been performed in many fish species, including Oncorhynchus mykiss (Kause et al, 2002), Scophthalmus maximus (Wang et al, 2010), Pangasianodon hypophthalmus (Sang et al, 2009), Paralichthys olivaceus (Tian et al, 2011), Penaeus vannamei (Pérez-Rostro and Ibarra, 2003), and Salmo salar (Haffray et al, 2012). For example, nine morphological traits (total length, head length, snout length, body width, head width, interorbital distance, body depth, head depth, and body weight) from juvenile Polyodon spathula were measured, among which total length was the most predominant variable to affect body weight (Yuan et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Optimization of selective breeding through analysis of morphological traits in Chinese sea bass (Lateolabrax maculatus)

Wang

Chen

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Determining correlations between certain traits of economic importance constitutes an essential component of selective activities. In this study, our aim was to provide effective indicators for breeding programs of Lateolabrax maculatus, an important aquaculture species in China. We analyzed correlations between 20 morphometric traits and body weight, using correlation and path analyses. The results indicated that the correlations among all 21 traits were highly significant, with the highest correlation coefficient identified between total length and body weight. The path analysis indicated that total length (X 1 ), body width (X 5 ), distance from first dorsal fin origin to anal fin origin (X 10 ), snout length (X 16 ), eye diameter (X 17 ), eye cross (X 18 ), and slanting distance from snout tip to first dorsal fin origin (X 19 ) significantly affected body weight (Y) directly. The following multiple-

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Coupling body weight and its composition: a quantitative genetic analysis in rainbow trout

Cited by 107 publications

References 31 publications

Flesh characteristics of pan-size triploid and diploid rainbow trout (<i>Oncorhynchus mykiss</i>) reared in a commercial fish farm

Flesh characteristics of pan-size triploid and diploid rainbow trout (<i>Oncorhynchus mykiss</i>) reared in a commercial fish farm

Genetic variation for carcass quality traits in cultured sea bass (Dicentrarchus labrax)

Optimization of selective breeding through analysis of morphological traits in Chinese sea bass (Lateolabrax maculatus)

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Coupling body weight and its composition: a quantitative genetic analysis in rainbow trout

Cited by 107 publications

References 31 publications

Flesh characteristics of pan-size triploid and diploid rainbow trout (&lt;i&gt;Oncorhynchus mykiss&lt;/i&gt;) reared in a commercial fish farm

Flesh characteristics of pan-size triploid and diploid rainbow trout (&lt;i&gt;Oncorhynchus mykiss&lt;/i&gt;) reared in a commercial fish farm

Genetic variation for carcass quality traits in cultured sea bass (Dicentrarchus labrax)

Optimization of selective breeding through analysis of morphological traits in Chinese sea bass (Lateolabrax maculatus)

Contact Info

Product

Resources

About

Flesh characteristics of pan-size triploid and diploid rainbow trout (<i>Oncorhynchus mykiss</i>) reared in a commercial fish farm

Flesh characteristics of pan-size triploid and diploid rainbow trout (<i>Oncorhynchus mykiss</i>) reared in a commercial fish farm