Length-weight relationships and prediction equations of body composition of farm raised Astyanax aff. Fasciatus (Actinopterygii: Characiformes: Characidae)

This study ascertains the length-weight relationship and predicts body composition equations in cultivated Astyanax aff. fasciatus. A total of 300 fish were distributed in five groups according to body weight: 1.19 ± 0.18, 3.7 ± 0.70, 7.55 ± 0.97, 12.28 ± 2.32 and 22.16 ± 2.64 g. The length-weight r...

Full description

Saved in:
Bibliographic Details
Published in:Zoologia (Curitiba, Brazil) Brazil), 2014-12, Vol.31 (6), p.521-524
Main Authors: Furuya, Valéria R.B., Michelato, Mariana, Cruz, Thais P. da, Furuya, Wilson M.
Format: Article
Language:English
Subjects:
Actinopterygii
Animal populations
Aquaculture
Astyanax
Body weight
Characidae
Characiformes
Fish
growth
mathematical modeling
Physical growth
Regression analysis
ZOOLOGY
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study ascertains the length-weight relationship and predicts body composition equations in cultivated Astyanax aff. fasciatus. A total of 300 fish were distributed in five groups according to body weight: 1.19 ± 0.18, 3.7 ± 0.70, 7.55 ± 0.97, 12.28 ± 2.32 and 22.16 ± 2.64 g. The length-weight relationship was elaborated using linear (y i = b0 + b1x i) or second-order (y i = b0 + b1x i + b1x i²) regression analysis. The value of the b slope in the length-weight relationship was 3.6971 and the intercept was 0.0031. The prediction equations obtained for body moisture, crude protein, crude lipid and ash were, y = 71.680 - 0.404BW, y = 17.140 - 0.095BW, y = 8.432 +0.364BW and y = 3.720 - 0.032BW, respectively, where BW is the body weight of fish (g). The use of prediction equations to describe body composition as a tool to support fish production and commercialization is suggested.
ISSN:1984-4670
1984-4689
1984-4689
DOI:10.1590/S1984-46702014000600001