Habitat Use and Its Effect on Body Size Distribution in a Population of the Tree Lizard, Urosaurus ornatus

1996 ◽  
Vol 30 (4) ◽  
pp. 528 ◽  
Author(s):  
Geoffrey R. Smith
Keyword(s):  
Body Size ◽  
Habitat Use ◽  
Size Distribution ◽  
Urosaurus Ornatus ◽  
Tree Lizard

Thermal tolerance in the tree lizard (Urosaurus ornatus) from a desert population and a low montane population

1994 ◽  
Vol 72 (11) ◽  
pp. 2066-2069 ◽  
Author(s):  
Geoffrey R. Smith ◽  
Royce E. Ballinger
Keyword(s):  
New Mexico ◽  
Body Size ◽  
Body Mass ◽  
Thermal Tolerance ◽  
Late Summer ◽  
Desert Environment ◽  
Urosaurus Ornatus ◽  
Critical Thermal Maxima ◽  
Tree Lizard ◽  
Two Populations

We studied the thermal tolerance of two populations of the tree lizard Urosaurus ornatus from a desert environment in southwestern New Mexico and a low montane environment in southeastern Arizona. In general, there were no differences in thermal tolerance between the two populations. Desert individuals tended to have higher panting thresholds in the summer than low montane individuals, whereas the reverse held for late summer and fall. Males had lower critical thermal maxima than females in the low montane population, but there was no difference in the desert population. Thermal tolerance varied from month to month, tolerances being highest during the summer. Thermal tolerance was related to body size (measured as both snout–vent length and body mass), explaining up to 39% of the variance.

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.

Intra-population variability of the non-breeding distribution of southern giant petrels Macronectes giganteus is mediated by individual body size

2018 ◽  
Vol 30 (5) ◽  
pp. 271-277
Author(s):  
Lucas Krüger ◽  
Vitor H. Paiva ◽  
Julia V.G. Finger ◽  
Elisa Petersen ◽  
José C. Xavier ◽  
...  
Keyword(s):  
Body Size ◽  
Habitat Use ◽  
Population Level ◽  
Total Body Length ◽  
South Shetland Islands ◽  
Latitudinal Distribution ◽  
The North ◽  
Wing Load ◽  
Breeding Distribution ◽  
Individual Body

AbstractLiterature reports that body size can be associated with latitudinal distribution, for instance larger animals inhabit higher latitudes and colder habitats. This rule can be applied for species and populations within a species. The potential influence of body size on non-breeding distribution and habitat use at the intra-population level was investigated for southern giant petrels Macronectes giganteus (Gmelin) from Elephant Island, South Shetland Islands. The non-breeding distribution of 23 individuals was tracked, and total body length, culmen length, wing length, wing load and body mass were measured. Positions of core areas were used to estimate the latitudinal distribution of each individual. Smaller individuals were found to be associated more with lower latitudes, where warmer conditions and more coastal and productive waters prevail, whereas large males were associated more with higher latitudes, with colder conditions near sea ice caps, presumably feeding on carrion or preying on penguins. This association reflects a latitudinal gradient, with smaller individuals positioning themselves towards the north, and larger individuals towards the south. In this case, body size, individual distribution and habitat use were found to be associated, highlighting the importance of studying potential effects of individual body size on the ecology of seabirds.

Habitat use by crayfish in stream pools: influence of predators, depth and body size

2000 ◽  
Vol 43 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Göran Englund ◽  
James J. Krupa
Keyword(s):  
Body Size ◽  
Habitat Use

Intraspecific variation in tree lizard escape behaviour in relation to habitat and temperature

Behaviour ◽  
2020 ◽  
Vol 157 (2) ◽  
pp. 185-204 ◽  
Author(s):  
Cynthia L. Morris ◽  
Matthew S. Lattanzio
Keyword(s):  
Antipredator Behaviour ◽  
Similar Response ◽  
Response Patterns ◽  
Escape Behaviour ◽  
Urosaurus Ornatus ◽  
Escape Theory ◽  
Habitat Gradients ◽  
Disturbance Gradient ◽  
Tree Lizards ◽  
Tree Lizard

Abstract Optimal escape theory has proven useful for understanding the dynamics of antipredator behaviour in animals; however, approaches are often limited to single-population studies. We studied how the escape behaviour of tree lizards (Urosaurus ornatus) varied across a disturbance gradient. We also considered how sex, body temperature, and perch temperature affected their escape decisions. Both sexes exhibited similar response patterns; however, lizards in the most-disturbed habitat, as well as cooler (body or perch temperature) lizards, initiated escape earlier (but did not flee further) than other animals. Increased wariness as indicated by earlier escape suggests that frequently-disturbed, more-open localities may be stressful habitats for species like U. ornatus. In addition, because cooler temperatures limit locomotor performance capacity, escape decisions should also depend on a species’ thermal ecology. Overall, we stress the importance of multi-population approaches for capturing the variety of ways species adaptively respond to the threat of predation across habitat gradients.

Tree Lizard (Urosaurus Ornatus) Territories: Experimental Perturbation of the Sex Ratio

Ecology ◽  
1987 ◽  
Vol 68 (6) ◽  
pp. 2059-2062 ◽  
Author(s):  
Robert T. M'Closkey ◽  
Keith A. Baia ◽  
Ronald W. Russell
Keyword(s):  
Sex Ratio ◽  
Urosaurus Ornatus ◽  
Tree Lizard

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.

Sign in / Sign up

Export Citation Format

Share Document