TY - JOUR
T1 - Ontogenetic comparisons of standard metabolism in three species of crocodilians
AU - Gienger, C. M.
AU - Brien, Matthew L.
AU - Tracy, Christopher R.
AU - Manolis, S. Charlie
AU - Webb, Grahame J W
AU - Seymour, Roger S.
AU - Christian, Keith A.
PY - 2017/2/9
Y1 - 2017/2/9
N2 - Due in part to their large size, aggressive temperament, and difficulty in handling, there are few physiological studies of adult crocodilians in the literature. As a result, studies comparing individuals across an ontogenetic series and comparisons among species are also lacking. We addressed this gap in knowledge by measuring standard metabolic rates (SMR) of three species of crocodilians (Crocodylus porosus, C. johnsoni, and Alligator mississippiensis), and included individuals that ranged from 0.22 to 114 kg. Allometric scaling of SMR with body mass was similar among the species, but C. porosus had significantly higher SMR than did C. johnsoni or A. mississippiensis. Differences in SMR among species are potentially related to behavioural differences in levels of aggression; C. porosus are the most aggressive of the crocodilians measured, and have rates of standard metabolism that are approximately 36% higher at the grand mean body size than those measured for C. johnsoni or A. mississippiensis, which are among the least aggressive crocodilians.
AB - Due in part to their large size, aggressive temperament, and difficulty in handling, there are few physiological studies of adult crocodilians in the literature. As a result, studies comparing individuals across an ontogenetic series and comparisons among species are also lacking. We addressed this gap in knowledge by measuring standard metabolic rates (SMR) of three species of crocodilians (Crocodylus porosus, C. johnsoni, and Alligator mississippiensis), and included individuals that ranged from 0.22 to 114 kg. Allometric scaling of SMR with body mass was similar among the species, but C. porosus had significantly higher SMR than did C. johnsoni or A. mississippiensis. Differences in SMR among species are potentially related to behavioural differences in levels of aggression; C. porosus are the most aggressive of the crocodilians measured, and have rates of standard metabolism that are approximately 36% higher at the grand mean body size than those measured for C. johnsoni or A. mississippiensis, which are among the least aggressive crocodilians.
UR - http://www.scopus.com/inward/record.url?scp=85012041144&partnerID=8YFLogxK
U2 - 10.1371/journal.pone.0171082
DO - 10.1371/journal.pone.0171082
M3 - Article
C2 - 28182696
AN - SCOPUS:85012041144
SN - 1932-6203
VL - 12
SP - 1
EP - 7
JO - PLoS One
JF - PLoS One
IS - 2
M1 - e0171082
ER -
