Does Body Size Optimization Result in Skewed Body Size Distribution on a Logarithmic Scale?

1999 ◽  
Vol 153 (4) ◽  
pp. 445
Author(s):  
Kindlmann ◽  
Anthony F. G. Dixon ◽  
Dostalkova
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Size Optimization ◽  
Logarithmic Scale ◽  
Optimization Result

Does Body Size Optimization Result in Skewed Body Size Distribution on a Logarithmic Scale?

1999 ◽  
Vol 153 (4) ◽  
pp. 445-447 ◽  
Author(s):  
Pavel Kindlmann ◽  
Anthony F. G. Dixon ◽  
Iva Dostálková
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Size Optimization ◽  
Logarithmic Scale ◽  
Optimization Result

scholarly journals Accretion of a large LL parent planetesimal from a recently formed chondrule population

2020 ◽  
Vol 6 (16) ◽  
pp. eaay8641
Author(s):  
Graham H. Edwards ◽  
Terrence Blackburn
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Total Duration ◽  
Parent Body ◽  
Ordinary Chondrite ◽  
Minimum Size ◽  
Thermal Models ◽  
Early Stages ◽  
Chondritic Meteorites ◽  
Chondrule Formation

Chondritic meteorites, derived from asteroidal parent bodies and composed of millimeter-sized chondrules, record the early stages of planetary assembly. Yet, the initial planetesimal size distribution and the duration of delay, if any, between chondrule formation and chondrite parent body accretion remain disputed. We use Pb-phosphate thermochronology with planetesimal-scale thermal models to constrain the minimum size of the LL ordinary chondrite parent body and its initial allotment of heat-producing 26Al. Bulk phosphate 207Pb/206Pb dates of LL chondrites record a total duration of cooling ≥75 Ma, with an isothermal interior that cools over ≥30 Ma. Since the duration of conductive cooling scales with parent body size, these data require a ≥150-km radius parent body and a range of bulk initial 26Al/27Al consistent with the initial 26Al/27Al ratios of constituent LL chondrules. The concordance suggests that rapid accretion of a large LL parent asteroid occurred shortly after a major chondrule-forming episode.

Interspecific Allometries Are by-Products of Body Size Optimization

1997 ◽  
Vol 149 (2) ◽  
pp. 352-380 ◽  
Author(s):  
Jan Koziowski ◽  
January Weiner
Keyword(s):  
Body Size ◽  
Size Optimization ◽  
By Products

Species body size distribution patterns of marine benthic macrofauna assemblages from contrasting sediment types

1999 ◽  
Vol 79 (5) ◽  
pp. 793-801 ◽  
Author(s):  
David M. Parry ◽  
Michael A. Kendall ◽  
Ashley A. Rowden ◽  
Stephen Widdicombe
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Species Turnover ◽  
Distribution Patterns ◽  
Benthic Macrofauna ◽  
Size Spectrum ◽  
Size Spectra ◽  
Β Diversity ◽  
Sediment Types ◽  
Geometric Size

Species body size spectra have been constructed for macrofauna assemblages from four sites with contrasting sediment granulometry and heterogeneity in and around Plymouth Sound. The number of species and species turnover (β diversity) were higher on coarse sediment. While the fauna were distinct between sites, the median geometric size-class was conservative (class 14; 0.153–0.305 mg dry blotted weight). Only one site had significantly lower heterogeneity within the species size spectrum, yet this was the most heterogeneous sediment. As such, we were unable to reject the null hypothesis that species body size distribution patterns are conservative despite differences in sediment granulometry and heterogeneity.

Body size distribution in Daphnia populations as an effect of prey selectivity by planktivorous fish

Hydrobiologia ◽  
2010 ◽  
Vol 643 (1) ◽  
pp. 5-19 ◽  
Author(s):  
Z. Maciej Gliwicz ◽  
Ewa Szymanska ◽  
Dariusz Wrzosek
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Planktivorous Fish ◽  
Prey Selectivity

Body Size Distribution of Spider Species in Various Forest Habitats

2017 ◽  
Vol 65 (4) ◽  
pp. 359-370
Author(s):  
Marzena Stańska ◽  
Tomasz Stański
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Spider Species ◽  
Forest Habitats

Random mating by size in a population of common toads (Bufo bufo)

1987 ◽  
Vol 8 (4) ◽  
pp. 321-330 ◽  
Author(s):  
Jeremy G.M. Robertson ◽  
Jacob Höglund
Keyword(s):  
Body Size ◽  
Mating System ◽  
Size Distribution ◽  
Random Mating ◽  
Bufo Bufo ◽  
Operational Sex Ratio ◽  
Southern Sweden ◽  
Female Fecundity ◽  
Mean Size ◽  
Displacement Patterns

AbstractThe mating system of a population of individually marked common toads (Bufo bufo) was studied during two years at a pond on the island Öland, southern Sweden. The mating system can be described as explosive breeding with scramble competition for mates. Males outnumbered females by approximately 2:1 and competed for the possession of females by guarding them prior to spawning and by displacing already paired males. Data on displacement patterns showed that smaller males were displaced more often than larger males. However, successful males were not larger than the male they displaced. Furthermore, thc mean size of spawning males was not different from the population mean and the size distribution of spawning males did not differ from the size distribution expected by chance. No size assortion could be detected among spawning pairs. Female fecundity showed a strong correlation with increasing body size. Males of all sizes showed capability of fertilizing all eggs of any female. Females apparently did not choose their mates. Though males would enhance their reproductive success by mating with large and more fecund females, this scenario was probably hampered due to a short breeding season and an operational sex ratio close to 2: 1.

Habitat type as strongest predictor of the body size distribution ofChydorus sphaericus(O. F. Müller) in small water bodies

2014 ◽  
Vol 99 (5) ◽  
pp. 382-392 ◽  
Author(s):  
Anna M. Basińska ◽  
Marcin Antczak ◽  
Kasper Świdnicki ◽  
Vincent E. J. Jassey ◽  
Natalia Kuczyńska-Kippen
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Habitat Type ◽  
The Body ◽  
Water Bodies ◽  
Small Water ◽  
Small Water Bodies

scholarly journals Spiders associated with Psychotria carthagenensis Jacquin. (Rubiaceae): vegetative branches versus inflorescences, and the influence of Crematogaster sp. (Hymenoptera, Formicidae), in South-Pantanal, Brazil

2008 ◽  
Vol 68 (2) ◽  
pp. 229-232 ◽  
Author(s):  
RR. Faria ◽  
TN. Lima
Keyword(s):  
Body Size ◽  
Size Distribution ◽  
Relative Abundance ◽  
Behavioral Experiment ◽  
Control Treatment ◽  
Significant Difference ◽  
Spider Community ◽  
Guild Composition ◽  
Spider Abundance ◽  
Different Parts

The aim of this study was to analyze: i) the spider community in vegetative and reproductive branches of Psychotria carthagenensis concerning relative abundance, guild composition and body size distribution; ii) ant abundance in diferent types of branches and iii) the spider behavior when experimentally put in contact with inflorescences covered with ants. There was no difference between vegetative and reproductive branches in relation to spider abundance, composition of guilds and body size distribution of spiders. However, there was a significant difference in ant abundance. In the behavioral experiment, 90% of the spiders were expelled from inflorescences by ants; in control treatment, 100% remained in the inflorescences. The ant density in different parts of the plant may explain the spider distribution.

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