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Ecosystem-wide body-size trends in Cambrian-Devonian marine invertebrate lineages
- Article from:
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Paleobiology
- Article date:
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April 1, 2008
- Author:
- Novack-Gottshall, Philip M
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Copyright informationCopyright Paleontological Society Spring 2008. Provided by ProQuest LLC. (Hide copyright information)
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Abstract.-
Fossil marine lineages are generally expected to exhibit long-term trends of increasing body size because of inherent fitness advantages or secular changes in environmental conditions. Because empirical documentation of this trend during the Paleozoic has been lacking for most taxonomic groups, the magnitude, timing, and taxonomic breadth of the trend have remained elusive. This study uses the largest existing database of fossil invertebrate sizes from four faunally important phyla to document ecosystem-wide size trends in well-preserved biotas from deep-subtidal, soft-substrate assemblages during the Cambrian through Devonian. Size of type specimens was measured along standard ...
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Gender, body size and social relations in American high schools.
Social Forces;
March 1, 2008 ;
Crosnoe, Robert Frank, Kenneth Mueller, Anna Strassmann;
787 words
......any above-average (and even average) body size (Allon 1981; Anderson et al. 1992; Dejong...Brownell 2001). In this way, divergence from body size ideals creates a major disadvantage in...1998). These social consequences of body size, then, suggest that the long-term implications...
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GRADIENT OF FISH PREDATION ALTERS BODY SIZE DISTRIBUTIONS OF LAKE BENTHOS.
Ecology;
February 1, 2000 ;
BLUMENSHIN, STEVEN C. LODGE, DAVID M. HODGSON, JAMES R.;
787 words
......fish produced consistent, predictable body size distributions of benthos in which large...Generalizations addressing patterns of body size distributions within and among ecosystems...words: benthic-pelagic links; benthos; body size distribution; fish bioenergetics; Micropterous...
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Weighty matters: Body size, diet and specialization in aphidophagous...
European Journal of Entomology;
July 1, 2008 ;
Sloggett, John J;
787 words
...Key words. Body size, prey size, prey density, capture efficiency...to have no relationship with ladybird body size. However, these arguments possess a...Because of this relationship, ladybird body size also provides an important trade-off...
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Differences in body size among chuckwalla (Sauromalus obesus) populations.
Ecology;
January 1, 1999 ;
Tracy, Christopher R.;
787 words
...INTRODUCTION Body size is perhaps the most important factor...organisms (Miles and Dunham 1992), and body size in turn is influenced by phylogeny...studies of life-history characters, and body size in particular, often focus on identifying...
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Energetic constraints and the relationship between body size and home...
Ecology;
January 1, 1999 ;
Kelt, Douglas A. Van Vuren, Dirk;
787 words
......relationship between home range size and body size in mammals concluded that we presently...assumed that allometric relationships with body size were linear across all species. Many...variation that is allowable for a given body size. For example, the relationship between...
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Increasing human body size and its physical and environmental...
Townsend Letter;
February 1, 2008 ;
Samaras, Thomas T. Desnoes, Jonn;
787 words
......various factors related to increasing body size and its impact on chronic disease and...presented little-known findings on human body size in an article entitled, How Human Size...presented at that time indicated that larger body size, both height and weight, resulted in...
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Temporary shift of body size in hooded crows Corvus corone cornix of NW...
Folia Zoologica;
January 1, 2004 ;
Acquarone, Camilla; Cucco, Marco; Malacarne, Giorgio; Silvano, Fabrizio;
787 words
......through selection and directional evolution of body size. In NW Italy a notable climatic episode...periods 1986-88 and 1997-2000 we measured the body size and mass of 808 adult hooded crows. Body size measurements of specimens collected from...
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The influence of body size on linear measurements used to reflect cervical...
Physical Therapy;
December 1, 1994 ;
Chibnall, John T. Duckro, Paul N. Baumer, Kelly;
787 words
......Duckro PN, Baumer K. The influence of body size on linear measurements used to reflect...might be confounded by variability in body size when comparisons are made between subjects...patient B is 28.0 cm. If the difference in body size is taken into account in the ROM measure...
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Body size-related coexistence: an approach through allometric constraints...
Ecology;
June 1, 1995 ;
Basset, Alberto;
787 words
......large enough to support their existence. Body size, or the degree of concentration, affects...1959, Lawton 1990). The influence of body size at the community level is generally explained...A quantitative relationship between body size and guild structure has been introduced...
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Black and white adolescent females' perceptions of ideal body size.
Journal of School Health;
March 1, 1996 ;
Parnell, Kathy Sargent, Roger Thompson, Sharon H. Duhe, Sonya F. Valois, Robert F. Kemper, Richard C.;
787 words
......themselves as thinner.[15,17] Perception of body size as it relates to actual size may be a...the obese.[18] Singh[19] concluded that body size and fatness and its distribution play...relationship between racial preferences for body size and cultural differences in body ...
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Diet composition and body size in insect herbivores: Why do small species...
European Journal of Entomology;
January 1, 2005 ;
Cízek, Lukás;
787 words
...Key words. Body size, constraint, diet composition, herbivory...Abstract. The hypothesis that small body size is correlated with preference for young...revealed a negative correlation between body size and a preference for feeding on young...
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Scientists Discover Sequence of Canine DNA Key to Diversity in Dog Body...
Targeted News Service;
April 5, 2007 ;
277 words
......DNA key to the great diversity in the body size of dogs, from Chihuahuas to Grant Danes...a gene that has been implicated in body size in other organisms including mice and...which exhibit the greatest diversity in body size of any terrestrial vertebrate, the authors...
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Comparative Food Habits and Body Size of Five Populations of Elaphe...
Copeia;
August 2, 2005 ;
Filippi, Ernesto; Rugiero, Lorenzo; Capula, Massimo; Capizzi, Dario; Luiselli, Luca;
787 words
...The comparative diet and body size of the Four-Lined Snake (Elaphe quatuorlineata...about the relationships between snake body size and prey preferences (Shine, 1991...from free-ranging individuals) and body size (especially highlighting sexual size...
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Measurement of body size and shape perception in eating-disordered and...
British Journal of Psychology;
November 1, 2003 ;
Tovee, Martin J. Benson, Philip J. Emery, Joanne L. Mason, Suzanne M. Cohen-Tovee, Esther M.;
787 words
......include a distorted evaluation of personal body size (DSM-IV,, 1994), and this is also a key...body image dysfunction: a perceptual body size distortion and a 'cognitive-evaluative...when an observer is unable to gauge her body size accurately, and the cognitive distortion...
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Gender Differences in Body Image and Health Perceptions among Graduating...
Journal of the National Medical Association;
December 1, 2005 ;
Gross, Susan M; Gary, Tiffany L; Browne, Dorothy C; LaVeist, Thomas A;
787 words
......was to identify gender differences in body size awareness and perceived impact of weight...females and 63% of males expressed some body size dissatisfaction. Fewer obese males (38...history, body awareness and income, but not body size satisfaction. Findings suggest gender...
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