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RESPIRATION

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LUNGFISH= can gulp air into its gas bladder. Gill rakers used to filter plankton (anchovy and herring). SWIM or GAS BLADDER ; ... – PowerPoint PPT presentation

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Title: RESPIRATION


1
RESPIRATION
  • STRUCTURES arch, filaments, rakers
  • WATER FLOW- in mouth out operculum (gill
    cover)
  • COUNTER CURRENT SYSTEM FOR EFFICIENT OXYGEN UPTAKE

2
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3
COUNTER CURRENT SYSTEM
  • Blood flows counter (opposite)
  • to the flow of water
  • Result more Oxygen transferred to the blood

4
RESPIRATION/ GILLS (contd.)
  • GILLS with special glands to excrete
  • excess salt (salt water sp.)
  • VARIATIONS
  • LUNGFISH can gulp air into its gas bladder
  • Gill rakers used to filter plankton
    (anchovy and herring).

5
SWIM or GAS BLADDER
  • for NEUTRAL BOUYANCY
  • (neither floats or sinks)
  • Absent in bottom fish (Halibut)
  • and Pelagic fish (Tunas)

6
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7
  • In a fish at 7000 meters depth, the pressure need
    in the bladder would be 5 tons per square inch,
    or 700 atmoshperes.
  • What happens to a rockfish when caught and
    rapidly reeled to the surface?
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