G R O U P 2 P R E S E N TAT I O NR A C H E L YA N P H O E B E M A K P H O E B E Y U L E E W I N G S U M

L A R G E S T R E A M S N A I L

D I S T R I B U T I O N

• Slow water flow: 12

• Fast water flow: 7

• Explanation: easily washed away by quick stream

A D A P TAT I O N

• Sucker-like structure

• Hiding under rocks

• Bearing hard shell

• --> avoid and defend against predators

• Graze on firm substrates (rocks, woody debris)

F E E D O N :

- small bits of algae and organic debris found on the bottom and sides of the river channel or lake

S U C K E R - B E L LY L O A C H

D I S T R U B U T I O N

• Slow water flow: 4

• Fast water flow: 0

• Found on rock surfaces

• Explanation: difficult to resist the strong water current

P R E D A C E O U S C H U B

A B U N D A N C E O F F I S H

Predaceous Chub

Red Cheek Goby

Sucker belly Loach

Broken band Hillstream Loach

Banded Forktailed Loach

0 2.5 5 7.5 10

• PREDACEOUS CHUB

• one the commonest freshwater fishes found in local unpolluted streams

• The body: with a distinct black mid-lateral band and ends with a black spot. The black band becomes less prominent in adult.

A D A P TAT I O N

• Sucker like structure

• Streamlined or flattened body

• Smooth body surface

• Fins

AV O I D A N D D E F E N D A G A I N S T P R E D AT O R S

• Camouflage

• Hide between crevice

A D A P TAT I O N ( FA S T R U N N I N G W AT E R )

S U C K E R - B E L LY L O A C H

L A R G E S T R E A M S N A I L

P R E D A C E O U S C H U B

S U C K E R L I K E S T R U C T U R E

+ +

S M O O T H B O D Y S U R FA C E

+

S T R E A M L I N E D B O D Y

+ +

F L AT T E N E D B O D Y

+ +

H I D E U N D E R R O C K S

+ +

A N T I - P R E D AT I O NS U C K E R - B E L LY

L O A C HL A R G E S T R E A M

S N A I LP R E D A C E O U S

C H U B

H I D E U N D E R R O C K S

+ +

Q U I C K R E A C T I O N

+

H A R D S H E L L S +

C A M O U F L A G E + +

I N T E R R E L AT I O N S H I P

• Competition

• Different species of fish compete for food

• E.g. Microorganisms, plant and algae