THE PARTITIONING OF BODY WATER IN OSTEICHTHYES: PHYLOGENETIC AND ECOLOGICAL IMPLICATIONS IN AQUATIC VERTEBRATES

Autor:	Thomas B. Thorson
Rok vydání:	1961
Předmět:	Teleostei medicine.diagnostic_test Phylogenetic tree Ecology Body water Chondrostei Fluid compartments Hematocrit Biology Plasma volume biology.organism_classification Holostei medicine General Agricultural and Biological Sciences
Zdroj:	The Biological Bulletin. 120:238-254
ISSN:	1939-8697 0006-3185
DOI:	10.2307/1539380
Popis:	1. The major body fluid compartments were measured in two species of fresh-water Chondrostei, two species of fresh-water Holostei, three species of fresh-water Teleostei and seven species of marine teleosts. These were compared with previous measurements of an agnathan species and four species of Chondrichthyes.2. A general correlation was shown between the relative rates of respiratory movements and pulse rates, but neither of these appeared to be related to the taxonomic series. A faster pulse was more characteristic of marine than of fresh-water species.3. Plasma volume was measured by the dye dilution method, using T-1824. Whole blood volume was calculated from plasma volume and hematocrit. A progressive reduction in plasma and whole blood volume was noted, proceeding from the primitive to the more advanced groups. This is true both among the three classes of aquatic vertebrates and also among the three groups within the Osteichthyes. These volumes were remarkably similar in fresh-water and marine tel...
Databáze:	OpenAIRE
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