Heritability of Body Size Traits, Dressing Weight and Lipid Content in Channel Catfish

El-Ibiary, Hussein M.; Joyce, John A.

doi:10.2527/jas1978.47182x

Cited by 30 publications

(3 citation statements)

References 6 publications

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“…In other species, this low correlation between morphometric variables and body weight with body yields has already been observed (Botelho, ; Diodatti et al, ; Turra et al, ). Linear measurements are reliable parameters to estimate carcass and fillet weights, but not for the yields of these components (El‐Ibiary & Joice, ). Such observations reported by the authors corroborate with the results found in the present study.…”

Section: Discussionmentioning

confidence: 99%

Associations between morphometric variables and weight and yields carcass in PirapitingaPiaractus brachypomus

et al. 2019

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The objective of this work was to evaluate the association between morphometric variables and carcass characteristics in Pirapitinga. We used a thousand specimens of Pirapitinga with an average weight of 1,200 g, which were stunned, slaughtered, weighed, measured, and processed for morphometric and processing yield analysis, to obtain weights, carcass and fillet yields. Initially, the linearity of the variables was verified. Pearson's simple and partial correlation tests were performed between all metrics. Track analysis was performed considering the weights and yields of carcass and filet as dependent variables and the others as independent variables. Ridge regression models were used to eliminate the effects of multicollinearity among the independent variables. Observations showed that the simple correlations between body weights and yields were superior to the partial ones in terms of magnitude. The length and circumference of the specimens were the measures most linearly associated with weight, carcass weight and fillet with rib weight. As for carcass yield and fillet yield, linear correlation coefficients were low and not significant when associated with body weights.With the path analysis, we could observe significant positive correlations between the morphometric measurements for weight, carcass weight and fillet with rib weight.The standard length, body circumference and body circumference/body height ratio are the most correlated. The latter are the most important variables in the evaluation of body weights in Pirapitinga fish. They can serve as criteria for indirect selection in searching for fish with better carcass characteristics. As for fillet and carcass yields, the morphometric variables have not shown to be efficient for indirect selection. K E Y W O R D Sbreeding fish, correlation, multivariate, path analysis, round fish

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Section: Discussionmentioning

confidence: 99%

Associations between morphometric variables and weight and yields carcass in PirapitingaPiaractus brachypomus

et al. 2019

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“…Despite limited numbers of studies, sexual dimorphic heritabilities were also reported for other crustaceans, [e.g. h 2 for growth‐related traits was higher for the immature male than female in Red Swamp crawfish, Procambarus clarkii (Girard), Lutz & Woltress 1989], and fish (El‐Ibiary & Joyce 1978; Crandell & Gall 1993).…”

Section: Discussionmentioning

confidence: 99%

Heritability for growth traits in giant freshwater prawn, Macrobrachium rosenbergii (de Mann 1879) based on best linear unbiased prediction methodology

Kitcharoen

Rungsin

Koonawootrittriron

et al. 2011

Aquaculture Research

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In this study, heritability was estimated for growth-related traits of giant freshwater prawn (Macrobrachium rosenbergii) before and after morphological sexual differentiation. Estimation was made on data from16 fullsib and eight half-sib families. The variance estimation was performed using a univariate mixed linear animal model and variance components were analysed following an animal model using restricted maximum likelihood procedure using average information algorithm. Heritability estimates (h 2 ) varied considerably with ages. At 2 months old, h 2 for carapace length (CL; 0.35 AE 0.15) and body weight (BW; 0.26 AE 0.13) were higher than those estimated at 5 months old, based on mixed sex data. However, when data were sorted by sex, h 2 calculated from data of females were higher than those of males for CL (0.26 AE 0.16 vs. 0.10 AE 0.06), BW (0.28 AE 0.17 vs. 0.12 AE 0.08), body length (0.40 AE 0.17 vs. 0.11 AE 0.07), total length (0.47 AE 0.18 vs. 0.11 AE 0.07) and claw length (0.29 AE 0.16 vs. 0.03 AE 0.04). The same trend was observed for traits at 6 months old in both bulk and individual rearing.

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“…According to these authors, the low correlation can be attributed to the variations resulting from processing instead of the characteristics inherent to the fish morphology. According to El‐Ibiary and Joice (), the linear measures are reliable parameters for estimating carcass and filet weight, but not for the yield of these components. This fact was also found by Ribeiro et al, , when studying the association between morphometric variables of weight and yield of pirapitinga ( Piaractus brachypomus ) concluded that the morphometric variables were not efficient for indirect selection of animals.…”

Section: Discussionmentioning

confidence: 99%

Application of morphometric measures in estimation of body weight and discrimination ofAstyanax lacustrisandAstyanax fasciatus

et al. 2019

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The objective of this study was to verify the direct and indirect correlation between morphometric measures, ratios, body weight and yield in two lambari species Astyanax lacustris and Astyanax fasciatus and whether the discriminant analysis is capable of separating and allocating the species. We used 102 lambari yellow tail and 60 lambari red tail. The fish were weighed and submitted to the evaluation of the morphometric measurements. The direct and indirect effects were evaluated by the method of track analysis, considering weight at slaughter, weight of body parts and body yields as dependent variables and measures and morphometric ratios as explanatory variables. Astyanax lacustris presented higher height and body width, carcass yield and trunk, while A. fasciatus presented higher head yield and viscera weight. The discriminant analysis was able to classify 79.5% of the two species. Track analysis demonstrated that the morphometric measurements can be used for estimation of body and body components’ weight in A. lacustris and A. fasciatus. However, regarding the corporal yield; the morphometric measures were insufficient to explain the yield variations of the species.

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Heritability of Body Size Traits, Dressing Weight and Lipid Content in Channel Catfish

Cited by 30 publications

References 6 publications

Associations between morphometric variables and weight and yields carcass in PirapitingaPiaractus brachypomus

Associations between morphometric variables and weight and yields carcass in PirapitingaPiaractus brachypomus

Heritability for growth traits in giant freshwater prawn, Macrobrachium rosenbergii (de Mann 1879) based on best linear unbiased prediction methodology

Application of morphometric measures in estimation of body weight and discrimination ofAstyanax lacustrisandAstyanax fasciatus

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