THE EFFECT OF FOOD LEVEL ON GROWTH-RATE AND FREQUENCY OF METAMORPHOSIS AND PEDOMORPHOSIS IN AMBYSTOMA-GRACILE

Authors
Citation
Le. Licht, THE EFFECT OF FOOD LEVEL ON GROWTH-RATE AND FREQUENCY OF METAMORPHOSIS AND PEDOMORPHOSIS IN AMBYSTOMA-GRACILE, Canadian journal of zoology, 70(1), 1992, pp. 87-93
Citations number
47
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Zoology
Journal title
ISSN journal
0008-4301
Volume
70
Issue
1
Year of publication
1992
Pages
87 - 93
Database
ISI
SICI code
0008-4301(1992)70:1<87:TEOFLO>2.0.ZU;2-K
Abstract
The effect of food level on larval growth response and frequency of me tamorphosis and paedomorphosis was examined in Ambystoma gracile from high- and low-elevation populations in British Columbia. Larvae that e ventually metamorphosed and those that became paedomorphic did not dif fer in growth rates when fed equal quantities of food. Body size at me tamorphosis did not differ between fast- and slow-growing larvae, but larvae fed high levels of food metamorphosed sooner than those fed les s. Food level had no effect on the frequency of metamorphosis and paed omorphosis. Larvae of different sexes did not differ in growth rate or frequency of metamorphosis and paedomorphosis, nor did larvae origina ting from populations from high and low elevations. Variation in the m etamorphic response occurred within and between larvae from separate e gg clutches. The findings are discussed in light of current hypotheses on factors influencing alternative life-history patterns in facultati vely paedomorphic salamanders.