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Morphological characteristics of blood cells in monitor lizards: is erythrocyte size linked to actual body size?
Author(s) -
FRÝDLOVÁ Petra,
HNÍZDO Jan,
CHYLÍKOVÁ Lenka,
ŠIMKOVÁ Olga,
CIKÁNOVÁ Veronika,
VELENSKÝ Petr,
FRYNTA Daniel
Publication year - 2013
Publication title -
integrative zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 34
ISSN - 1749-4877
DOI - 10.1111/j.1749-4877.2012.00295.x
Subject(s) - biology , cell size , context (archaeology) , lizard , ontogeny , morphology (biology) , blood cell , zoology , metabolic rate , ecology , immunology , endocrinology , microbiology and biotechnology , paleontology
Blood cell morphology and count are not uniform across species. Recently, between‐species comparisons revealed that the size of red blood cells is associated with body size in some lizard taxa, and this finding was interpreted in the context of the metabolic theory. In the present study, we examined the numbers and the size of blood cells in 2 species of monitor lizards, the mangrove‐dwelling monitor ( Varanus indicus ) and the savannah monitor ( V. exanthematicus ), and we compared these traits in individuals of different body size. The results revealed that during the course of ontogeny, the size of red blood cells increases with body mass. Because the mass‐specific metabolic rate decreases with body size and the cell volume‐to‐surface ratio decreases with the cell size, changes in the erythrocyte size might be the result of oxygen transport adjustment.