We studied specific features of development of the gill system during ontogenesis of the zebrafish Danio rerio and ninespine stickleback Pungitius pungitius, which differ in the rates of gill system, development. Although the development of sticklebacks proceeds in nature at lower temperatures than for zebrafish, the rate of gill formation in the former is higher. These differences are related to the specific conditions in which these fish develop: embryonic and larval development of the stickleback proceeds in bodies of water with a lower oxygen content than for zebrafish, and this results in the adaptive alteration of the rate of gill system development. Differentiation of gills in the zebrafish is accompanied by a manifold increase in the oxygen consumption rate. At different developmental stages, the incremental rates of oxygen consumption and increase in the body mass of the zebrafish larvae and fry differed significantly.
Russian Journal of Developmental Biology – Springer Journals
Published: Oct 13, 2004
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