merged

Target Strength Measurements of Oreochromis Niloticus in Aspect of
Stress by Using Echo Sounder
Norsyafikah binti Abdul Hamid
Supervisor: Dr. Nik Aziz bin Nik Ali
Bachelor of Applied Science (Fisheries)
School of Fisheries and Aquaculture Science
The identification of target strength (TS) of Oreochromis niloticus in fiber glass tank
has been conducted by using SIMRAD EK15 with 200 kHz frequency. Two type
conditions were chosen which are starvation and salinity exposure. The experiment
has been implemented in separate tanks to observe the relationship of TS value with
stress and normal condition. The size of fish used is in the range 12.9 cm to 15.5 cm.
The collecting data of TS by using SIMRAD EK15 has been divided on morning and
evening in a day. Result showed that, TS value of fish in starvation has no significant
different between the controls fish with p-value > 0.05, while fish were exposed in
saline water displayed p-value < 0.05 that has significant different among the TS
value. Thus, this study found that fish in saline water has been affected on swim
bladder sizes that resulting distinctness on TS value.
618 | UMT UNDERGRADUATE RESEARCH DAY 2018