Using morphometric variables in evaluations of body of fish yields

Abstract

The study of the use of morphometric variables in the evaluation of body income in fish is of great importance from an economic point of view, because through them, can make an estimation of productivity, both for the farmer and for the fish processing industry; or even serve as selection criteria in breeding programs. The fish carcass quality is an essential factor for defining the preparation processes of products and types of fish cuts. Over the years it was developed several methods to evaluate in vivo animal goals to help the breeding and commercially classify carcasses. The housing assessment work, are disabled by the lack of standardization of the terms used and due to the divergence of body regions in which measurements are obtained. These facts undermine the comparison of data in the same species and in different species. Some morphometric measurements may exhibit a linear relationship with the body weight and the yield, indicating that there is proportionality between these parameters during growth. In breeding programs, knowledge of the correlation between characters is important when you want to do simultaneous selection or when a character of interest has a low heritability, problems of difficulty of measurement or identification. The correlation unfolding is dependent on the number of characters studied, which is generally established by prior knowledge the investigator as to their importance to possible inter-relationships expressed in path diagrams.