Standard Metabolic Rate (SMR) is inversely related to erythrocyte and genome size in allopolyploid fish of the Cobitis taenia hybrid complex

0367742 - ÚŽFG 2012 RIV GB eng J - Journal Article
Maciak, S. - Janko, Karel - Kotusz, J. - Choleva, Lukáš - Boron, A. - Juchno, D. - Kujawa, R. - Kozlowski, J. - Konarzewski, M.
Standard Metabolic Rate (SMR) is inversely related to erythrocyte and genome size in allopolyploid fish of the Cobitis taenia hybrid complex.
Functional Ecology. Roč. 25, č. 5 (2011), s. 1072-1078. ISSN 0269-8463. E-ISSN 1365-2435
R&D Projects: GA AV ČR KJB600450902; GA ČR GA206/09/1298
Institutional research plan: CEZ:AV0Z50450515
Keywords : CELL-SIZE * C-VALUE * PASSERINE BIRDS
Subject RIV: EB - Genetics ; Molecular Biology
Impact factor: 4.567, year: 2011

As a first approximation, whole-body metabolic rate can be considered as the sum of metabolic rates of constituent cells. Yet, among several current explanations of metabolic rate scaling, only two explicitly invoke cell architecture of organisms: (1) the Metabolic Theory of Ecology, which predicts size invariance of metabolically active cells, such as erythrocytes and (2) the cell metabolism hypothesis postulating partial dependence of metabolic scaling on the cell size (CS), which is mediated by nucleus / genome size variation. 2. Here, we tested (1) and (2) by comparing standard metabolic rate (SMR), erythrocyte size (used as a proxy of CS) and nucleus size (NS) between diploid and triploid individuals of a small fish (body mass of c. 3 g) belonging to the Cobitis taenia hybrid complex. 3. We demonstrated a positive correlation of CS with genome/nucleus size and an inverse relationship between those traits and SMR.
Permanent Link: http://hdl.handle.net/11104/0202306