نتایج جستجو برای: allometric growth
تعداد نتایج: 820456 فیلتر نتایج به سال:
Department of Animal Science,Faculty of Agriculture,University of Uyo, Uyo, Akwa Ibom State, Nigeria A total of 40 New Zealand white rabbits were used in a study where prediction models were developed for predicting live weight and evaluating the carcass. In the study, six body measurements namely, body length, thigh circumference, shank length, chest width, body circumference and girth were de...
BACKGROUND Peak oxygen uptake (VO(2peak)) can be defined as the highest oxygen rate consumed during exhaustive or maximal exercise. The evaluation of the aerobic fitness can be expressed as relative to body mass, but this procedure may not fully remove differences when heavy subjects are assessed. Thus, the allometric scaling procedure is an attractive strategy to compare individuals with large...
Metabolic rate of living organisms (energy produced per unit time) increases slower than organisms' mass. This phenomenon, when applied to different taxa, is called interspecific allometric scaling. Its causes remain unknown. Here we show that interspecific allometric scaling for multicellular organisms occurred as the result of evolution of organisms within the food chain, and certain mechanic...
Nonlinear regression is increasingly used to develop allometric equations for forest biomass estimation (i.e., as opposed to the traditional approach of logtransformation followed by linear regression). Most statistical software packages, however, assume additive errors by default, violating a key assumption of allometric theory and possibly producing spurious models. Here, we show that such mo...
This study aimed to investigate the changes and growth pattern of Persian sturgeon fishing in fishing regions of Golestan and biological characteristics of this species over a period of 10 years. The highest amount of Persian sturgeon fishing was in 2012, when a total of 143 pieces of this species were caught from five fishing grounds in Golestan province, and the lowest amount was caught in 13...
Precise exponential scaling with size is a fundamental aspect of phenotypic variation. These allometric power laws are often invariant across taxa and have long been hypothesized to reflect developmental constraints. Here we test this hypothesis by investigating the evolutionary potential of an allometric scaling relationship in drosophilid wing shape that is nearly invariant across 111 species...
this research develops an allometric model for estimation of biomass based on the height and dbh of trees in the hyrcanian forests of iran. an accurate allometric model reduces the uncertainty of allometric equation in biomass estimation using radar images. in this study, 317 trees were selected randomly from the 4 different dominant tree species for the development of an allometric model cover...
ABSTRACT The skulls of 54 specimens the South American tapir, Tapirus terrestris collected in department Loreto, Peru were measured, analyzed and compared to investigate skull development this species. Univariate, multivariate allometric analyses performed using 32 variables through traditional morphometrics. Significant shape variation was detected among ontogenetic classes. Young individuals ...
Extended abstract Introduction: Today, various technologies have been developed to improve seed quality with the aim of increasing the percentage, speed and uniformity of germination and better seedling establishment under different environmental conditions. One of these technologies is seed pre-treatment or seed priming. In this regard, some studies confirmed that pre-treatment of seeds with ...
In multivariate regression, interest lies on how the response vector depends a set of covariates. A regression model is proposed where covariates explain variation in only direction first principal component axis. This not parsimonious, but it provides an easy interpretation allometric growth studies log-transformed data corresponds to constants growth. The naturally generalizes two–group exten...
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