The role of metachrosis in thermoregulation of Sceloporus malachiticus


previous item | next item

Citation
The role of metachrosis in thermoregulation of Sceloporus malachiticus

Material Information

Title:
The role of metachrosis in thermoregulation of Sceloporus malachiticus
Translated Title:
El papel de la metachrosis en la termorregulación de Sceloporus malachiticus
Creator:
Napier Stonedale, Joel Patrick
Publication Date:
Language:
Text in English

Subjects

Subjects / Keywords:
Lizards ( lcsh )
Lagartijas ( lcsh )
Costa Rica--Puntarenas--Monteverde Zone
Costa Rica--Puntarenas--Zona de Monteverde
CIEE Fall 2003
CIEE Otoño 2003
Genre:
Reports

Notes

Abstract:
Metachrosis is a change in color, common to many amphibians and reptiles. The purpose of this study was to determine if rate of metachrosis correlates with weight in Sceloporus malachiticus. Twenty-one lizards were collected and photographed every half hour, and the change in reflected light in the photographs was measured. There was a significant negative correlation between rate of metachrosis and weight (Simple Regression, P < 0.02), which is an indication that metachrosis aids in thermoregulation. Larger lizards must remain darker longer in order to absorb heat more quickly, because their lower surface area to volume ratio causes them to need more heat for their large bodies that have limited ability to absorb heat due to their proportionately lower surface area. This need for larger lizards to be darker may also explain why other reptiles such as Clelia clelia, Clelia ceytalia, Ctenosaura similis, and Iguana iguana become darker as they grow older and increase in size. ( ,, )
Abstract:
Metachrosis es un cambio en color, común en muchos anfibios y reptiles. El propósito de este estudio fue determinar si la tasa de metachrosis tiene correlación con el peso en Sceloporus malachiticus. Se colectó Veintiún lagartijas y se fotografiaron cada media hora, y se midió el cambio en la luz reflejada en las fotografías. Hubo una correlación negativa y significativa entre la tasa de metachrosis y el peso (Regresión simple, P < 0.02), lo cual es una indicación de que la metacrosis ayuda en la termorregulación. Las lagartijas más grandes deben quedarse más oscuras por más tiempo para absorber calor más rápidamente, por su área de superficie más baja de proporción de volumen, ellos necesitan más calor para sus cuerpos grandes que tienen la habilidad limitada de absorber el calor. Esta necesidad para lagartijas más grandes ser más oscura puede explicar también por qué otros reptiles como Clelia clelia, Clelia ceytalia, Ctenosaura similis, e Iguana iguana llegan a ser más oscuros como ellos crecen más viejo y más grande.
Biographical:
Student affiliation : Department of Animal Behavior, University of Texas at Austin
Acquisition:
Digitized by MVI

Record Information

Source Institution:
Monteverde Institute
Holding Location:
Monteverde Institute
Rights Management:
This item is licensed with the Creative Commons Attribution Non-Commercial No Derivative License. This license allows others to download this work and share them with others as long as they mention the author and link back to the author, but they can’t change them in any way or use them commercially.
Resource Identifier:
M39-00161 ( USFLDC DOI )
m39.161 ( USFLDC Handle )

Postcard Information

Format:
Book

Downloads

This item has the following downloads:


Full Text
xml version 1.0 encoding UTF-8 standalone no
record xmlns http:www.loc.govMARC21slim xmlns:xlink http:www.w3.org1999xlink xmlns:xsi http:www.w3.org2001XMLSchema-instance
leader 00000nas 2200000Ka 4500
controlfield tag 008 000000c19749999pautr p s 0 0eng d
datafield ind1 8 ind2 024
subfield code a M39-00423
040
FHM
0 041
eng
049
FHmm
1 100
Napier Stonedale, Joel Patrick
242
Marlene
245
The Role of Metachrosis in Thermoregulation of Sceloporus malachiticus
260
c 2003-12
500
Digitized by MVI
3 520
Metachrosis is a change in color, common to many amphibians and reptiles. The purpose of this study was to
determine if rate of metachrosis correlates with weight in Sceloporus malachiticus. Twenty-one lizards were
collected and photographed every half hour, and the change in reflected light in the photographs was
measured. There was a significant negative correlation between rate of metachrosis and weight (Simple
Regression, P < 0.02), which is an indication that metachrosis aids in thermoregulation. Larger lizards must
remain darker longer in order to absorb heat more quickly, because their lower surface area to volume ratio
causes them to need more heat for their large bodies that have limited ability to absorb heat due to their
proportionately lower surface area. This need for larger lizards to be darker may also explain why other
reptiles such as Clelia clelia, Clelia ceytalia, Ctenosaura similis, and Iguana iguana become darker as they
grow older and increase in size.
Marlene
546
Text in English.
650
Lizards
Costa Rica--Puntarenas--Monteverde Zone
4
Lagartijas
Costa Rica--Puntarenas--Zona de Monteverde
653
Tropical Ecology Fall 2003
Sceloporus malachiticus
Ecologa Tropical Otoo 2003
Sceloporus malachiticus
655
Reports
720
MVI
773
t Monteverde Institute : Tropical Ecology
856
u http://digital.lib.usf.edu/?m39.423


printinsert_linkshareget_appmore_horiz

Download Options

close

Download PDF

Images

Choose Size
Choose file type



Cite this item close

APA

Cras ut cursus ante, a fringilla nunc. Mauris lorem nunc, cursus sit amet enim ac, vehicula vestibulum mi. Mauris viverra nisl vel enim faucibus porta. Praesent sit amet ornare diam, non finibus nulla.

MLA

Cras efficitur magna et sapien varius, luctus ullamcorper dolor convallis. Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Fusce sit amet justo ut erat laoreet congue sed a ante.

CHICAGO

Phasellus ornare in augue eu imperdiet. Donec malesuada sapien ante, at vehicula orci tempor molestie. Proin vitae urna elit. Pellentesque vitae nisi et diam euismod malesuada aliquet non erat.

WIKIPEDIA

Nunc fringilla dolor ut dictum placerat. Proin ac neque rutrum, consectetur ligula id, laoreet ligula. Nulla lorem massa, consectetur vitae consequat in, lobortis at dolor. Nunc sed leo odio.