Rainbow Trout: Introduction and Importance

Rainbow trout, Oncorhynchus mykiss, are colorful freshwater fish native to North America, renowned for their striking iridescent hues. Sporting a streamlined body and distinctive pink stripe along their sides, rainbow trout inhabit cold, clear streams and lakes. They are prized by anglers for their spirited fights and delicious flesh. Rainbow trout are opportunistic feeders, consuming insects, crustaceans, and small fish. They play crucial roles in freshwater ecosystems as both predators and prey, contributing to the balance of aquatic food webs.

1. UNIVERSITY OF CHAKWAL,PAKISTAN
TOPIC: RAINBOW TROUT FISH

2. DEPARTMENT OF ZOOLOGY
PRESENTED BY:AREEBA AMMAN NOOR
REG.NO:20M-UOC/ZOL-09
SESSION:2020-24
SUBJECT: ICTHYOLOGY
SUBMITTED TO: DR.SYEDA NADIA AHMAD
TOPIC: RAINBOW TROUT FISH

3. RAINBOW TROUT FISH
•Trout is a fish with variety of colors based on its habitat and
species.
•Native to Asia and North America found in cold streams of
Pacific ocean.
•Its body is round and long, also their stunning hues radiating
from skin give rise to term rainbow trout.
❑Kingdom -Animalia
❑Phylum -Chordata
❑Class -Actinoptergii
❑Order -Salmoniformes
❑Family -Salmonidae
❑Genus -Oncorhyncus
❑Species –O.mykiss
❑Binomial name –Oncorhyncus mykiss

4. ❑Morphology
✓Lateral line is
continuous.
✓Anal,adipose,cau
dal,pelvic,pectoral,
dorsal fins are
present.
✓Cycloid scales
✓Terminal mouth
✓Teeth present on
jaws
✓No teeth present
on midline of
tongue

5. Characters of rainbow trout
Having
adipose
fleshy fin on
behind of
dorsal fin.
Pelvic fins are
abdominal
and have
single soft
dorsal fin.
Length-
20/30inches
Weight-8
pounds
Mass: 0.5-
2.5kg
Have small
scales over
body, lack
spines.
Tail fin is
forked and .
Anal fin has
10-11 rays.
[5]

6. ❑Feeding
•their diet usually
consists of tiny fish,
aquatic insects,
terrestrial insects, and
snails.
The fish that live in big
lakes and oceans are
bottom feeders; they
consume mollusks,
crabs, worms, other
fish, squid, and
amphipods
❑Breeding
•In their first year of life,
fish raised in hatcheries
typically reach a length of
around 10 inches.
•Reproduce when the water
temperature reaches a
minimum of 6 to 7 °C.
•Start spawning when they
are 3 or 4 years old. And
throughout the breeding
season, the female can lay
anywhere between 200 and
8000 eggs.

7. Interesting facts
Prefer 32-70
degree
Fahrenheit ,
rich in
Omega-3
fatty acid.
Female can
spawn 200-
8000 eggs
per season.
Carnivores
that eat
insects
,crustacean
s and small
fishes.
Largest
recorded
weight is 48
ibs (22kg).
They cannot
live in
polluted
water.
They have
been
farmed for
food since
1870.
Having 7
fins, no
lower teeth.
Can lay
thousands
of eggs at a
time.
They are
predators.
Chile is
largest
producer of
rainbow
trout.
[5]

8. ❑Migratory Behavior
•Partially migrated
species.
•The study suggests that a
migratory life history is
not controlled by a
singular gene or region,
and that conserving and
promoting genetic
diversity is crucial for
preserving these
populations.
❑Parental behavior
•Spawning and nesting
•Egg protection
•Guarding the nest
•Fry protection
•Feeding
•Post-spawning

9. ❑RECENT AND FUTURE TRENDS OF
RAINBOW TROUT SECTOR
•Lifecyclestartswithbroodstockbreedingandegg
fertilization.
•Eggqualityisdeterminedbyeggnumberandembryo
development.
•Automatedphenotypingsystemhavebeendevelopedto
detectdeadeggsandembryonicmalformations
•Geneticselectionandmarkerassistedselectionareused
toimprovefishgrowthandhealth.
•Recirculatingaquaculturesystemprovidewaterreuse
control.[2]

10. ❑Extraction of heavy metals
▪The anthropogenic
activities surrounding
the river led to
depletion of dissolve
oygen,making the
water unfit for trout
fish survival.[3]
▪Samples were
collected and
transported to K.I.U
biological sciences lab.
▪Atomic absorption
spectroscopy was used
to detect heavy metals
like
cadmium,kead,arsenic,
mercury,chromium
and copper.[3]

11. CULTURAL IMPORTANCE
ECONOMIC
VALUE
CULTURAL
AND
SOCIAL
SIGNIFICA
NCE
FOOD
SECURITY
ENVIRONM
ETAL
SUSTAINBI
LITY
RECREATIO
NAL
FISHING [1], [4]

12. REFERENCES
1.Vranić,D.,Đinović-Stojanović,J.,&Spirić,A.(2011).Rainbowtrout
(OncorhynchusMykiss)fromaquaculture–meatqualityandimportanceinthe
diet.Scientificjournal"MeatTechnology",52(1),122-133.
2.D’Agaro,E.,Gibertoni,P.,&Esposito,S.(2022).Recenttrendsand
economicaspectsintherainbowtrout(Oncorhynchusmykiss)sector.Applied
Sciences,12(17),8773.
3.Ali,S.(2021).Determinationofheavymetalsfromrainbowtrout
(Oncorhynchusmykiss)inGilgitRiverPakistan.JournalofBiology,10(6),
001-004.
4. Logan,S.H.,&Johnston,W.E.(1992).Economicsofcommercialtrout
production.Aquaculture,100(1-3),25-46.
5. Stanković,D.,Crivelli,A.J.,&Snoj,A.(2015).RainbowtroutinEurope:
introduction,naturalization,andimpacts.ReviewsinFisheriesScience&
Aquaculture,23(1),39-71.