fish diversity and diet in lake erken and falken created by ronalds aumeisters and elvijs berkolds
TRANSCRIPT
Fish Diversity and Diet in Lake Erken and Falken
Created by
Ronalds Aumeisters and Elvijs Berkolds
Introduction
There are many kinds of fish species in SwedishLakes.We wanted to make this research to see howmuch of different fish species we will catch in thetwo lakes- Lake Erken and Lake Falken.
Hypotheses
• There will be 2 dominant species (Perch, Roach).
• We will find a larger variety of fish species in shallow areas than the deeper ones.
• The fish will be bigger in deeper areas.• The fish diet is more varied in shallow areas
than in deep areas.
Materials & Methods
• Putting out nets• Picking up nets• Identifying fish• Identifying fish diet
Field Work
Field work equipment• Fish nets • Floats• Life west • Rowing boat• Notebook • GPS device• Eco Sounder
Laboratory Work
Laboratory work equipment• Scale • Measure • Microscope • Scope• Dissection instruments (scalpel, scissors) • Notebook + pencil
ResultsCaught fishes in Lake
ErkenPerch 18
Roach 26
Bream 6
Rudd 9
Burbot 1
Caught fishes in Lake Falken
Perch 17
Roach 28
Bream 2
Pike 1
Percentage of caught fishes in Lake Falken
Percentage of caught fishes in Lake Erken
P e r c h
0 %2 0 %4 0 %6 0 %8 0 %
1 0 0 %
0 5 1 0 1 5 2 0 2 5 3 0
T o t a l le n g t h [ c m ]
Sto
ma
ch
C
on
ten
t
c r a y f i s h
f i s h
z o o b e n th o s
z o o p la n k to n
R o a c h
0 %
5 0 %
1 0 0 %
0 5 1 0 1 5 2 0 2 5 3 0
T o t a l le n g t h ( c m )
Sto
ma
ch
c
on
ten
t
Z o o b e n th o s
Z o o p l a n k to n
A l g a e
DiscussionThe diversity in Lake Erken is very high comparing
to Lake Falken, which is an almost unknown, little explored lake. According to our results the largest amount of fish diversity were in shallow areas (this was the case in both lakes Erken and Falken.)
Thanks for listening!