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Flashcards in Lab 2 Deck (45):
1

Communicating with other fish is more difficult in ______ waters

Murky

2

Speed of sound in water is ______ than in air

Speed of sound in water is FASTER than in air

3

Important bone in ear for hearing

Otoliths

4

Weberian organ

Bones physically connecting ear to swim bladder to increase hearing ability

5

Lateral line system detects...

Vibrations and movement
Pressure waves

6

Structure used to detect water movement (currents and direction of movement)

Hair cells

7

Organ of Weber

Uses bones to transfer pressure changes detected in swim bladder to the inner ear

8

Electroception =

Ability to detect electric fields

9

Electroreceptor organ

Ampullae of Lorenzini

10

Sensory receptors in barbels

Tastebuds
Chemical detection

11

Habitat in which fish with barbels live

Bottom of water

12

Use of barbels

Touch the sediment and search for prey

13

Location of fish taste buds

Mouth, lips + body

14

Location of neuromasts

Skin

15

Primary organ for thrust generation when swimming

Caudal fin

16

Rete mirabile

Countercurent heat exchanger
Amplifies the level of oxygen and temperature of incoming vessels

17

Gas gland secretes...

Lactic acid

18

Lactic acid presence around swim bladder ->

Oxygen dissociates from haemoglobin -> oxygen concentration in gas bladder increases

19

What structure absorbs oxygen from the swim bladder?

Ovale

20

End of fish that secretes oxygen into swim bladder =

Anterior

21

At which end of the swim bladder is oxygen absorbed?

Posterior

22

What separates the swim bladder from the ovale?

Constrictor muscles

23

Relaxation of constrictor muscles between swim bladder and ovale ->

Oxygen absorbed by ovale -> decreased buoyancy

24

Layer of skin in which scales are embedded

Epidermis

25

Terminal mouth type =

Lower jaw projects further up than lower
Still flat

26

Where do fish with terminal mouths feed?

Mid water

27

Superior mouth type =

Rounded upwards
Lower jaw longer than upper

28

Where do fish with superior mouths feed?

Surface

29

Inferior sub-terminal mouth type =

Flat mouth

30

Where do fish with inferior sub-terminal mouths feed?

Bottom

31

Kinetic skull allows...

Considerable movement between the jaw and other parts of the skull

32

Semicircular canals

Pits in skin full of mucus and lined by hair cells
Detects water movements around the fish

33

Cirri

Fleshy flaps of skin

34

Physostomous swim bladder =

Connected to the gut

35

Physoclistous swim bladder =

No connection to the digestive tract

36

Aestivation =

Prolonged turpor

37

How does the African lungfish avoid drying out in drought season?

Secretes a mucus layer which hardens like a shell

38

Spawning =

Sperm and eggs shed into the water

39

Copulation =

Sexual intercourse introducing sperm to egg

40

Gonopodium =

Modified anal fin to deliver sperm into a female

41

Embryophagy =

First embryo consumes other embryos in utero

42

Functional hermaphrodite =

No distinct sex
One fish can produce sperm and eggs

43

Diadromous =

Spend part of life in fresh and marine waters

44

Anadromous =

Spawn in fresh water but live in salt water to feed and grow
Pacific Salmon

45

Catadromous =

Freshwater adults spawn in the ocean
Atlantic Eel