. The biology of marine animals. Marine animals; Physiology, Comparative. RESPIRATION 183 in the tissues and, owing to the relative constancy of sea water, can but rarely hinder loading in nature. Elasmobranch haemoglobin is less affected by C02 than that of teleosts, but there is still a distinct acid effect within physiological ranges of C02 tension, namely 1-2 mm Hg. Haemoglobins of sharks possess higher oxygen affinities than in rays. In the skate Raja 66% of the oxygen is utilized or removed from the arter- ial blood in passing through the tissues (74, 103, 105, 132, 135, 136, 153).. Fig.
. The biology of marine animals. Marine animals; Physiology, Comparative. RESPIRATION 183 in the tissues and, owing to the relative constancy of sea water, can but rarely hinder loading in nature. Elasmobranch haemoglobin is less affected by C02 than that of teleosts, but there is still a distinct acid effect within physiological ranges of C02 tension, namely 1-2 mm Hg. Haemoglobins of sharks possess higher oxygen affinities than in rays. In the skate Raja 66% of the oxygen is utilized or removed from the arter- ial blood in passing through the tissues (74, 103, 105, 132, 135, 136, 153).. Fig. Bohr Effect on Haemoglobins of Various Marine Animals Ordinates, log p50 (Oa pressure in mm Hg at which Hb is half saturated). Curves: 1: mackerel blood {Scomber scombrus), 25CC; 2: lamprey Petromyzon marinus, 20CC; 3: porpoise Phocaena phocaena, 38°C; 4: echiuroid Urechis caupo, 19CC; 5: lugworm Arenicola marina, 20°C; 6: skate Raja ocellata, 10-4°C (from various sources). Haemoglobin in Invertebrates. Although restricted in occurrence, the haemoglobins of marine invertebrates are of much theoretical interest and are deserving of detailed study. They are probably as variously adapted as those of vertebrates to their diverse functional roles, and further re- search on their physiology will be aided by correlated studies on oxygen consumption and ventilation of the species in question. Haemoglobin possesses strong affinity for carbon monoxide, which blocks it as an oxygen carrier. In Nereis diversicolor, treatment with CO. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Nicol, J. A. Colin (Joseph Arthur Colin), 1915-. New York, Interscience Publishers
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Keywords: ., bookcentury1900, booksubjectmarineanimals, booksubjectphysiology
