Results 251 to 260 of about 8,809 (288)
Some of the next articles are maybe not open access.
Allometric Growth and the Beverton and Holt Yield Equation
Transactions of the American Fisheries Society, 1964Abstract In the development of their theory of fishing, Beverton and Holt assume that growth is isometric and thus express the body weight of a fish as directly proportional to the cube of its length. The effect on their theory of replacing this assumption with an allometric growth equation estimated from weight-length data is examined in this paper ...
G. J. Paulik, Lawrence E. Gales
openaire +1 more source
Calculation and Miscalculation of the Allometric Equation Reconsidered
BioScience, 1969In the December 1968 issue of BioScience, an article appeared entitled "Calculation and Miscalculation of the Allometric Equation as a Model in Biological Data" by Jerrold H. Zar. This article, while dealing with a very basic and important problem of data analysis-the question of whether or not to use data transformations in fitting models to ...
openaire +1 more source
Estimation of parameters of allometric equations.
Bollettino della Societa italiana di biologia sperimentale, 1993Accurate parameter estimation of allometric equations is a question of considerable interest. Various techniques that address this problem exist. In this paper it is assumed that the measured values are normally distributed and a maximum likelihood estimation approach is used.
M, Valente +3 more
openaire +1 more source
On the hidden physical dimensions of the allometric equation.
Archivos de biologia y medicina experimentales, 1993The aim of the present study was to submit Huxley's allometric equation (Y = aMb) to a dimensional analysis; in this equation Y is any biological variable, a is the mass-coefficient, M represents body mass, and b the mass-exponent. The dimensions of each of its components is thoroughly analyzed by means of the MLT-system of physics, as is the ...
E, Morgado, B, Günther
openaire +1 more source
Allometric equations for estimating the foliage biomass of Scots pine
European Journal of Forest Research, 2007The research described in this paper was performed in the Niepolomice Forest (Southern Poland) in 2001 as part of the Forest Environmental Monitoring and Management System (FOREMMS; 5FP IST) project. The material for the present study consisted of the measurement results of the biomass of Scots pine shoots with needles and needles alone carried out on ...
Jarosław Socha, Piotr Wężyk
openaire +1 more source
Correcting for Bias in Log‐Transformed Allometric Equations
Ecology, 1983mals: their productivity and population dynamics, IBP. Volume 5. Cambridge University Press, London, England. Mahmud, F. S. 1980. Alary polymorphism in the small brown planthopper Laodelphax striatellus (Homoptera: Delphacidae). Entomologia Experimentalis et Applicata 28: 47-53. McCoy, E. D., and J. R. Rey. 1981. Alary polymorphism among the salt marsh
openaire +1 more source
Allometric equations for biomass assessment of subalpine dwarf shrubs
Alpine Botany, 2011Shrubs are an important component of mountain ecosystems in terms of productivity and diversity. The estimate of shrub biomass via allometric equations represents a non-destructive alternative to obtain quantitative data. We propose allometric equations to estimate aboveground biomass from easily acquirable descriptive parameters of plant height and ...
Tasneem M. Elzein +3 more
openaire +1 more source
Common allometric equations for estimating the tree weight of mangroves
Journal of Tropical Ecology, 2005Inventory data on tree weights of 104 individual trees representing 10 mangrove species were collected from mangrove forests in South-East Asia to establish common allometric equations for the trunk, leaf, above-ground and root weight. We used the measurable tree dimensions, such as dbh (trunk diameter at breast height), DR0.3 (trunk diameter at 30 cm ...
KOMIYAMA, Akira +2 more
openaire +2 more sources
Some theoretical consequences of the allometric growth equations
The Bulletin of Mathematical Biophysics, 1955The rate of growth of an organism may be described as a function of both its mass and of the time. In particular, if the rate of growth is described as a function of mass alone, one derives the so-called principle of “equifinality”, according to which the final mass achieved is independent of any interruption of the growth process.
openaire +1 more source
Allometric equations for four valuable tropical tree species
Forest Ecology and Management, 2006Four tree species were harvested periodically over a 13-year period from plantations in the humid lowlands of Costa Rica: Cedrela odorata, Cordia alliodora, Hyeronima alchorneoides, and Euterpe oleracea. The soil was a well-drained, volcanic alluvium, and high fertility coupled with 4 m of annual rainfall and high temperatures led to rapid growth rates;
Thomas G. Cole, John J. Ewel
openaire +1 more source