ICTHYOLOGY COURSE

1. FATIMA KHALID
BS.ZOOLO-F-15-E37
SEMESTER # 07
UNIVERSITY OF
EDUCATION .

2. FEEDING HABIT IN FISH

3. FEEDING
HABIT
Kind of food which an
animal species habitually
imbibes during its life or at a
particular stage of its
development.

4. MODES OF FEEDING
HERBIVORES
Labeo rohita Labeo gonis

5. omnivores
Cirrhinus mrigala
Cyprinus carpio

6. Carnivores
Wallagu attu

7. Channa marulius
Great Snakehead

8. Limnivores or Mud eaters
 Feed on microscopic algae and
microorganisms(Demersal fish)

9. SCOPE AND SIGNIFICANCE
Food and feeding habit of fish are
important biological factors for
selecting a group of fish for culture
in ponds to avoid competition for
food among themselves and live in
association and to utilize all the
available resources

10. ENABLES POLYCULTURE
SYSTEM
Cirrhinus mrigala

11. NATURAL FOOD OF FISH

12. KINDS OF FOOD
 FOUR CATEGORIES OF FOOD
 MAIN FOOD
 SECONDARY FOOD
 INCIDENTAL FOOD
 EMERGENCY FOOD

13. BERMUDA ANGLE FISH

14. STEONOPHAGIC AND
EURYPHAGIC FISHES :
Lemon sole fish
Mud minnows, Euryphagic fish

15. AQUATIC FOOD WEB AND
PYRAMIDS
 Trophic levels:
PRODUCERS (SEA WEED AND
SEAGRASSES)
CONSUMERS: are divided into herbivores
and carnivores and are typically further
divided into 1st, 2nd or 3rd level consumers.
For example, many zooplanktons in the
marine environment are herbivorous
consumers .DECOMPOSERS: Bacteria

16. APEX PREDATORS

17. MAJOR FEEDING TYPES
Grazers
Predators
Strainers
Suckers
Parasites

18. PREDATORS
 Predatory fish are fish that prey upon
other fish or animals. Some predatory fish
include perch, muskie, pike, walleye and
salmon

19. SUCKERS
 The sucking into the mouth is often practiced
by bottom feeding fishes such as
Sturgeons(Acipenseridae)and suckers
(Catostomidae).
STURGEON
S
CHUBSUCKER

20. GRAZERS
 In grazing the actual taking of food is by bites.
BLUE GILL
PARROTFISH

21. STRAINERS
 . Plankton filtration and swallowing of pea soup like
concentrates illustrates this feeding act as in many
herring like fishes including the gizzard shads
(Dorosoma).
GIZZARD SHADS
BASKING SHARKS

22. PARASITES
 Parasitism is the most unusual and highly
evolved feeding habit. Examples include
Lampreys and hag fishes that suck body
fluids from host fish after rasping a hole in the
side of body
LAMPREYS
HAGFISH

23. Fishes have evolved to different types of mouth
depending upon what their diet is and how they
feed:

24. TERMINAL :
YELLOWFIN TUNA
Scombridae (Thunnus albacares) Yellowfin
tuna Eleuthera, Bahamas .The yellowfin
tuna diet primarily consists of other fish
along with some squids and the occasional
crustacean

25. SUPERIOR
Megalopidae (Megalops atlanticus) Tarpon
Aquarium specimen Tarpon generally eat
schooling fish but they also eat some
crustaceans.

26. INFERIOR
Ostraciidae (Acanthostracion polygonius) Honeycomb
cowfish Spanish Wells, Bahamas Honeycomb cowfish
spend their time scavenging for detritus, waste products, or
bits of dead and decaying organisms

27. PROTRUSIBLE
Labridae (Lachnolaimus maximus) Hogfish Spanish
Wells, Bahamas Adult hogfish feed mostly on mollusks
or crustaceans