Flashcards in Lab 2 Deck (45):
Communicating with other fish is more difficult in ______ waters
Speed of sound in water is ______ than in air
Speed of sound in water is FASTER than in air
Important bone in ear for hearing
Bones physically connecting ear to swim bladder to increase hearing ability
Lateral line system detects...
Vibrations and movement
Structure used to detect water movement (currents and direction of movement)
Organ of Weber
Uses bones to transfer pressure changes detected in swim bladder to the inner ear
Ability to detect electric fields
Ampullae of Lorenzini
Sensory receptors in barbels
Habitat in which fish with barbels live
Bottom of water
Use of barbels
Touch the sediment and search for prey
Location of fish taste buds
Mouth, lips + body
Location of neuromasts
Primary organ for thrust generation when swimming
Countercurent heat exchanger
Amplifies the level of oxygen and temperature of incoming vessels
Gas gland secretes...
Lactic acid presence around swim bladder ->
Oxygen dissociates from haemoglobin -> oxygen concentration in gas bladder increases
What structure absorbs oxygen from the swim bladder?
End of fish that secretes oxygen into swim bladder =
At which end of the swim bladder is oxygen absorbed?
What separates the swim bladder from the ovale?
Relaxation of constrictor muscles between swim bladder and ovale ->
Oxygen absorbed by ovale -> decreased buoyancy
Layer of skin in which scales are embedded
Terminal mouth type =
Lower jaw projects further up than lower
Where do fish with terminal mouths feed?
Superior mouth type =
Lower jaw longer than upper
Where do fish with superior mouths feed?
Inferior sub-terminal mouth type =
Where do fish with inferior sub-terminal mouths feed?
Kinetic skull allows...
Considerable movement between the jaw and other parts of the skull
Pits in skin full of mucus and lined by hair cells
Detects water movements around the fish
Fleshy flaps of skin
Physostomous swim bladder =
Connected to the gut
Physoclistous swim bladder =
No connection to the digestive tract
How does the African lungfish avoid drying out in drought season?
Secretes a mucus layer which hardens like a shell
Sperm and eggs shed into the water
Sexual intercourse introducing sperm to egg
Modified anal fin to deliver sperm into a female
First embryo consumes other embryos in utero
Functional hermaphrodite =
No distinct sex
One fish can produce sperm and eggs
Spend part of life in fresh and marine waters
Spawn in fresh water but live in salt water to feed and grow