This document discusses the differences between acclimatization and adaptation in fish. Acclimatization is when a fish adjusts to changes in its environment to maintain performance, while adaptation refers to genetic modifications over generations that enhance survival. Specific acclimatization methods like floating bag, advanced floating bag, and drip are described. Adaptations allow fish to withstand different temperature, salinity, and migrate between fresh and salt water. The document provides examples like stenothermal/eurythermal fish tolerating narrow/wide temperatures and stenohaline/euryhaline fish tolerating narrow/wide salinity ranges. Diadromous fish migrate between environments, with catadromous living in salt water and anadrom

1. Fish Acclimatization
and Adaptation
Reynaldo Dacuag Balisong Baldo
SHS Special Science Teacher I

2. Introduction
• What happens to marine fish if you transfer to
freshwater?
• What happens if you transfer freshwater fish to
marine environment?
• What is the difference between adaptation and
acclimatization?

3. Acclimatization vs Adaptation
• Adaptation
physiological, biological, or anatomical
modifications occuring within a species (over
generations) that facilitates an enhanced ability to
survive and reproduce in a particular environment.
• Acclimatization
a process in which an organism adjust to a
change in its environment allowing it to maintain
performance accross a range of environmental
conditions.

4. Adaptation
• Countershading of tuna
Acclimatization

5. What is acclimatization?
• Scientific process by which any fish or
invertebrate or coral gradually adjust to
different changes in the environment and to its
parameters.

6. When do we need
acclimatization?
• fish, invertebrate or coral acclimatization is
required whenever we introduce sensitive
specimen to the tank or ponds

7. Why should we acclimate?
• to avoid death of newly introduced fish
invertebrate or coral
• to protect the fish, invertebrate from pH,
temperature shock
• allow the fish, invertebrate, coral to develop a
strong immunity and stay healthy for a long
time.

8. Acclimatization method
• Floating bag method
• Advanced floating bag method
• Drip method

9. Floating bag acclimatization
• put the bag carefully inside the tank and let it float
on the water surface
• keep the bag float for about 15-20 minutes so that
the temperature of the water inside the bag and of
the tank/pond water becomes equal
• remove the rubber band from the fingerlings
bag/fry bag containing the fish
• gradually release the fingerling or invertebrates
into the tank/pond

10. Pros
• the temperature of the water inside the bag and
that of the tank/pond water slowly becomes
equal thus avoiding temperature shock for the
fish.

11. Cons
• water parameters like pH, TDS and salinity of
the water inside the bag and that of the
tank/pond water are not matched
• it posses risk of introducing harmful bacteria
and parasites
• not advisable for sensitive fishes

12. Advanced floating bag
• put the bag carefully inside the tank and let it
float on the water surface
• keep the bag float for about 5 minutes so that
the temperature of the water inside the bag
and of the tank/pond water nearly becomes
equal
• remove the rubber band from the fingerlings
bag/fry bag containing the fish

13. • take a small cup and add small amount of water
from the tank to the bag and again wait for 5-
10 minutes. Continue the process for 4-5 times
• gradually release the fingerling or invertebrates
into the tank/pond

14. Pros
• water quality parameters like temperature, pH,
salinity are equal and matched.
Cons
• it posses risk of introducing harmful bacteria
and parasites

15. Drip acclimatization method
• most safe and successful method of
acclimatization
• bucket, fish net, arline tube, air flow controller,
and suction cup or airline tube holder

17. • take the bucket and place it on the floor
• remove the rubber band of the fry bag. gently pour
the fish into the bucket along with the water
• take the airline tube and attach the airflow valve to
one of its end keeping the other free
• place the free end of the airline tube inside the tank
and attach it to the inner wall using the suction cup.
place hte other end to the bucket

18. • gently start siphoning and let the water drain
from the lower part of the airline tube
connected to the airflow valve
• adjust the airflow valve so that only 1-2 drop of
water per second falls into the bucket
• let this dripping continue for 1 hour
• after 1 hour or more, transfer the fish into the
tank using the net

19. Pros
• water quality parameters like temperature, pH,
salinity are equal and matched.
Cons
• least chance of introducing harmful bacteria
and parasite

20. Adaptation
• Stenothermal
organisms can withstand a narrow range of
temperature.
• Eurythermal
organisms can withstand a wide range of
temperature.
• Stenohaline
organisms can withstand a narrow range of salinity
• Euryhaline
organisms can withstand a wide range of salinity

22. • Diadromous species
fish species that migrate between freshwater and
marine water. Spends part of their lives in freshwater
and part in marine water
• Catadromous
Catadromous fishes hatch or are born in marine
habitats, but migrate to freshwater areas where they
spend the majority of their lives growing and
maturing. As adults they return to the sea to spawn.
The word "catadromous" means "downward-running,"
and refers to the seaward migration of adults.

23. • Anadromous
Anadromous fishes are the opposite of
catadromous fishes in that hatching and a
juvenile period occur in freshwater. This is
followed by migration to and maturation in the
ocean. Adult fish then migrate back up rivers—
"anadromous" means "upward-running"—in
order to reproduce in freshwater habitats.

25. Thank
You !

26. Activity
Answer the question in the given figure