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Some Aspects of Gas Exchange in Tuna

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Figure

Table i. Per fusion rate of gills, head loss, resistance to water flow offered by the ^(calculated), oxygen uptake, and utilization (calculated) for seven skipjack tuna and onekawakawa tuna (£4)
Fig. 3. Relationship between utilization and gill flow rate in several teleoets. x , Tuna perfusedin the present study; D, trout perfused (Davis & Cameron, 1970); • , trout during forced swim-ming activity (Stevens & Randall, 1967); O, carp during hypoxia; • , carp during forcedswimming activity; A, sucker during hypoxia; A, sucker during forced swimming activity(Saunders, 1962); + , dogfish perfused (Hughes & Umezawa, 1968 a).
Fig. 5. Changes in heart rate and respiration rate in a tuna during a 'cough'. The shaded barindicates the' cough'
Table 6. A comparison of the data collected in the present experiment on (1970)
+2

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