نتایج جستجو برای: allometric coefficient

تعداد نتایج: 172571  

2015
Catherine M Hulshof Nathan G Swenson Michael D Weiser

The relationship between tree height and diameter is fundamental in determining community and ecosystem structure as well as estimates of biomass and carbon storage. Yet our understanding of how tree allometry relates to climate and whole organismal function is limited. We used the Forest Inventory and Analysis National Program database to determine height-diameter allometries of 2,976,937 indi...

2017
Caleb M Brown

Although the evolution and function of "exaggerated" bony projections in ornithischian dinosaurs has been subject to significant debate recently, our understanding of the structure and morphology of their epidermal keratinized coverings is greatly limited. The holotype of Borealopelta, a new nodosaurid ankylosaur, preserves osteoderms and extensive epidermal structures (dark organic residues), ...

1998
Thomas H. Dawson

The design of living beings is not only a matter of molecular biology but also of geometry and physics. This was once more demonstrated with a biophysical model by G. B. West et al. (1) that had been fine-tuned to predict the famous scaling law of metabolism (2), namely a 3/4 power relation between body mass and energy consumption. While properties and predictions of the model are remarkable, a...

Journal: :Journal of human evolution 2002
Michelle Singleton

Traditional classifications of the Old World monkey tribe Papionini (Primates: Cercopithecinae) recognized the mangabey genera Cercocebus and Lophocebus as sister taxa. However, molecular studies have consistently found the mangabeys to be diphyletic, with Cercocebus and Mandrillus forming a clade to the exclusion of all other papionins. Recent studies have identified cranial and postcranial fe...

2012
D. Sarma J. Das A. Dutta

Department of Zoology, Goalpara College, Goalpara-783 101, Assam (India) Department of Zoology, Gauhati University, Guwahati-78 1014, Assam (India) ABSTRACT: The studies were conducted during 2008–2010 to evaluate length-weight relationship and condition factor of Aorichthys aor in lower reaches of River Brahmaputra. 750 nos of fishes having weight of 20g to 1250 g and total length of 10 cm to ...

2016
Femke J. Taverne Ingeborg M. van Geijlswijk Dick J. J. Heederik Jaap A. Wagenaar Johan W. Mouton

BACKGROUND To optimize antimicrobial dosing in different animal species, pharmacokinetic information is necessary. Due to the plethora of cephalosporin antimicrobials and animal species in which they are used, assessment of pharmacokinetics in all species is unfeasible. In this study we aimed to describe pharmacokinetic data of cephalosporins by reviewing the available literature for food produ...

Journal: :Anatomical record 2011
Michelle Singleton Alfred L Rosenberger Chris Robinson Rob O'neill

The predominance of molar teeth in fossil hominin assemblages makes the patterning of molar shape variation a topic of bioanthropological interest. Extant models are the principal basis for understanding dental variation in the fossil record. As the sister taxon to the hominin clade, Pan is one such model and the only widely accepted extant hominid model for both interspecific and intraspecific...

2017
Matthew A. Vadeboncoeur Steven P. Hamburg Ruth D. Yanai

The allometric equations developed by Whittaker et al. (1974) at the Hubbard Brook Experimental Forest have been used to estimate biomass and productivity in northern hardwood forest systems for over three decades. Few other species-specific allometric estimates of belowground biomass are available, because of the difficulty of collecting the data, and such equations are rarely validated. Using...

ژورنال: بوم شناسی آبزیان 2015
Abbasi, Keyvan , Norouzi, Maryam ,

This study aimed to determine sex ratio, age, growth and reproduction of the populations of R.amarusin Sefidroodriver. In total 189 fish were caught monthly from February to June 2013. Overal sex ratio was 1:1/39. Total weight (W) and total length (TL) was 17/2-71/2mm and 0/06-5/81g, respectively. The condition coefficient of males was higher than females. Growth models in all population were p...

Journal: :New Journal of Physics 2013

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