Respiration; buccal and opercular pumps

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But, the time duration varies tremendously among fishes, depending on the speed with which they move through the water, and/or on oxygen availability in the particular environment to which they are adapted. In more slowly swimming species like various cods (family Gadidae), the opercular pump predominates. In faster swimming forms like jacks (family Carangidae), the buccal pump predominates.
In other pelagic forms, the pumps may not be used at all. For example, in fishes like mackerels and tunas (family Scombridae), which swim continuously at a good rate of speed, moving along with the mouth open and allowing the water to flow in and through the buccal and opercular cavities is enough to supply adequate oxygen to the gills. The stream of water can be regulated simply by the degree of mouth opening.
Page 1 and 2: BIOLOGY OF FISHES FISH/BIOL 311 FUN
Page 3 and 4: The average human can utilize only
Page 5 and 6: Within the pattern, however, can be
Page 7 and 8: Diagrammatically, we can express th
Page 9 and 10: Phase 3: The Buccal Pressure Pump:
Page 11 and 12: The timing of the expansion and con
Page 13: With sensitive pressure transducers
Page 17 and 18: In truly benthic forms, especially
Page 19 and 20: 3. STRUCTURE AND FUNCTION OF GILLS
Page 21 and 22: In all bony fishes there are muscle
Page 23 and 24: Deoxygenated blood reaches the gill
Page 25 and 26: Three-dimensional cut-away view thr
Page 27 and 28: List of Air-breathing Fishes Arrang
Page 29 and 30: Lateral views of the gill arches of
Page 31 and 32: Gills are never used for air breath
Page 33: What is the biological significance

Respiration; buccal and opercular pumps

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