Results 41 to 50 of about 15,591 (149)

Canine evolution in sabretoothed carnivores: natural selection or sexual selection? [PDF]

open access: yesPLoS ONE, 2013
The remarkable elongated upper canines of extinct sabretoothed carnivorous mammals have been the subject of considerable speculation on their adaptive function, but the absence of living analogues prevents any direct inference about their evolution.
Marcela Randau   +2 more
doaj   +1 more source

Allometry and sexual dimorphism of the Neotropical freshwater anomuran Aegla marginata Bond-Buckup & Buckup, 1994 (Crustacea, Anomura, Aeglidae)

open access: yesNauplius
This study analyzes ontogenetic allometry in Aegla marginata Bond-Buckup & Buckup, 1994, a freshwater crustacean, in order to evaluate the growth pattern and the presence of sexual dimorphism, using a multivariate approach.
Alexandre Ribeiro da Silva   +3 more
doaj   +1 more source

Retrospective and Prospective Human Intravenous and Oral Pharmacokinetic Projection of Dipeptidyl peptidase-IV Inhibitors Using Simple Allometric Principles – Case Studies of ABT-279, ABT-341, Alogliptin, Carmegliptin, Sitagliptin and Vildagliptin

open access: yesJournal of Pharmacy & Pharmaceutical Sciences, 2015
Purpose: The purpose of this exercise was to explore the utility of allometric scaling approach for the prediction of intravenous and oral pharmacokinetics of six dipeptidy peptidase-IV (DPP-IV) inhibitors viz. ABT-279, ABT-341, alogliptin, carmegliptin,
Ravindranath R Gilibili   +3 more
doaj   +1 more source

Allometry and morphological trait relationship in the sexually dimorphic Chinese dobsonfly, Acanthacorydalis asiatica (Wood-Mason, 1884) (Megaloptera, Corydalidae) [PDF]

open access: yesZooKeys, 2019
Male insects with large weapons such as horns and elongate mandibles would be expected to invest more on such structures than other parts of the body for advantages in male to male competition for mating.
Chengquan Cao, Pei Yu, Fumio Hayashi
doaj   +3 more sources

Multivariate allometry

open access: yes, 1996
The subject of allometry is variation in morphometric variables or other features of organisms associated with variation in size. Such variation can be produced by several biological phenomena, and three different levels of allometry are therefore ...
Christian Peter Klingenberg
core   +1 more source

Male mate choice scales female ornament allometry in a cichlid fish

open access: yesBMC Evolutionary Biology, 2010
Background Studies addressing the adaptive significance of female ornamentation have gained ground recently. However, the expression of female ornaments in relation to body size, known as trait allometry, still remains unexplored.
Kullmann Harald   +4 more
doaj   +1 more source

Statistical origin of allometry

open access: yes, 2011
The allometry relationship (AR) between two properties of a living network X and Y is X=aYb where one or both of the variables is a measure of size and the allometry coefficient a and exponent b are fit to data.
D. West, B. J. West
core   +1 more source

On the Relationship between Ontogenetic and Static Allometry [PDF]

open access: yes, 2013
Ontogenetic and static allometries describe how a character changes in size when the size of the organism changes during ontogeny and among individuals measured at the same developmental stage, respectively.
James M. Cheverud   +11 more
core   +2 more sources

Evolution of sexual dimorphism of wing shape in the Drosophila melanogaster subgroup

open access: yesBMC Evolutionary Biology, 2009
Background Sexual dimorphism of body size has been the subject of numerous studies, but few have examined sexual shape dimorphism (SShD) and its evolution.
Baylac Michel   +2 more
doaj   +1 more source

allometry

open access: yes, 2013
This is the matlab m-file containing the code used for the simulations of our ...
Fromhage, Lutz   +3 more
core   +1 more source

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