Attia Rehman, a 5th semester BS Zoology student, presented on identifying freshwater fish species in the Chenab River in Punjab, Pakistan using a dichotomous key. The presentation introduced freshwater fish, defined a dichotomous key, and provided a key identifying 6 fish species found in the area based on images of their heads, bodies, and scales. Data was collected on 915 images of the 6 species from local farms and rivers to develop the identification tool.

1. ATTIA REHMAN
F20-0946
BS ZOOLOGY
5th SEMESTER

2. PRESENTATION TOPIC:
DICHOTOMOUS KEY OF FRESHWATERFISHES

3. AREA OF RESEARCH IN PAKISTAN:
CHENABRIVER IN PUNJAB
INTRODUCTION OF FRESH WATER FISHES
DICHOTOMOUS KEY
SPECIES FOUND IN THAT AREA
TABLE

4. DICHOTOMOUS KEY:
Definition:
“A dichotomous key is an important scientific tool,
used to identify different organisms, based on
observable traits”
• Dichotomous key is a tool that allows the user to
determine the identity of items and organisms in natural
world.
• It offers a user a quick and easy way of identifying
unknown organisms.

5. FRESH WATER FISHES OF PAKISTAN
INTRODUCTION:
• It is a diverse group of animals that live and breathe in water. All fishes
are vertebrates.
• Fish is a cold-blooded aquatic organism that breathes with gills and swims with
fins.
• In pakistan, 531 species of fish have been identified, among which 233 are
freshwater and the remaining 298 are marine fish species
FRESH WATER FISH:
• Fish that spend most or all of their life in freshwaters, such as rivers and lakes,
having a salinity of less than 0.5 ppt. around 40% of all known species of fish are
found in freshwater.
• They are found in fresh water bodies such as river, lakes, ponds etc.

6. FISHES OF CHENAB RIVER IN PUNJAB:
• Fishes are most diverse group of vertebrates with more than 33000 species. These are identified based on several visual
characters including their shape, color and head. It is difficult for the common people to directly identify the fish species
found in the market, classifying fish species from images based on visual characteristics using computer vision and
machines.
• This key has located six different species of fishes in the head qadirabad, chenab river in punjab, pakistan.
• This classification is based on visual features of six different species i.e
CTENOPHARYNGODON IDELLA (GRASS CARP), CYPRINUS CARPIO (COMMON CARP), CIRRHINUS MRIGALA (MORI),
LABEO ROHITA (ROHU), HYPOPHTHALMICHTHYS MOLITRIX (SILVER CARP), AND CATLA (THALA).

7. DATA COLLECTION:
• A dataset of 6 different fish species i.e. ctenopharyngodon idella (grass carp), cyprinus carpio
(common carp), cirrhinus mrigala (mori), labeo rohita (rohu), hypophthalmichthys molitrix
(silver carp), and catla (thala), containing 915 images, popular for fish farming in the tropical areas of
world including pakistan.
• This dataset is type of multiclass containing 3 dominant features of fish species (body, head and scale).
• Dataset include 36 grass carp images of different poses (body, head, and scale) and that 36 images of
grass carp taken from the 5 different local farms located near head qadirabad, punjab.
• Similarly, common carp (158 images), mori (241 images) and rohu (249 images) were captured manually
from 3 different positions at the river of chenab, punjab, pakistan.
• The remaining images of fish dataset considering silver carp (175 images) and thala (56 images) were
obtained from the marala head works, sialkot, punjab with 3 different positions.

8. HEAD IMAGES OF 6 DIFFERENT FISHES:

9. BODY IMAGES OF 6 DIFFERENT SPECIES:

10. SCALE IMAGES OF 6 DIFFERENT SPECIES:

11. TABLE: