FRIDAY, AUGUST 14, 1987
9
NEW DEVICE TO HELP PREVENT FISH KILL
LEVEL
THE AGRICULTURE AND FISHERIES DEPARTMENT HAS SUCCESSFULLY DEVELOPED A NEW DEVICE TO HELP MARICULTURISTS IN DETECTING THE OF DISSOLVED OXYGEN IN THE WATER OF FISH CULTURE ZONES, WITH A VIEW TO PREVENTING FISH MORTALITY CAUSED BY OXYGEN DEPLETION.
THE NEW DEVICE, AN EASY-TO-USE OXYGEN DETECTION
KIT, WILL BE INTRODUCED TO FISH FARMERS THROUGH A SERIES OF SEMINARS TO BE HELD IN THE NEXT FEW WEEKS AT DIFFERENT LOCALITIES TO SUIT THEIR CONVENIENCE.
THE FIRST OF THE SERIES, WHICH WILL BE HELD ON AUGUST 21 AT 3 PM AT THE DEPARTMENT'S ABERDEEN FISHERIES OFFICE, IS NOW OPEN FOR FREE ENROLMENT FROM MARICULTURISTS.
THE NUMBER OF PARTICIPANTS IS LIMITED TO 50. THOSE INTERESTED SHOULD TELEPHONE 5-520171 EXT. 25 DURING OFFICE HOURS FOR REGISTRATION ON A FIRST-COME-FIRST-SERVED BASIS. IN THE EVENT OF OVER- SUBSCRIPTION, LATE APPLICANTS WILL BE ALLOCATED SPACE IN THE NEXT SEMINAR PLANNED FOR SEPTEMBER.
DR. PAUL MAK,
FISH KILLS IN
THE DEPARTMENT'S FISHERIES RESEARCH OFFICER, SAID TODAY (FRIDAY) OXYGEN DEPLETION CAUSED TWO MAJOR THE SHA TAU KOK AND YUNG SHUE AU FISH CULTURE ZONES IN THE LAST TWO MONTHS, RESULTING IN HEAVY LOSSES TO CULTURED STOCK.
HE SAID THE OCCURRENCE OF OXYGEN DEPLETION WAS OFTEN RELATED ΤΟ RED TIDES, ALGAL BLOOMS AND POOR WATER CIRCULATION. IN THE PREVAILING SUMMER MONTHS, AERATION DURING PERIODS OF STAGNANT TIDES OR LOW DISSOLVED OXYGEN SITUATIONS HELPS TO PREVENT OXYGEN DEPLETION.
"THE NEW DETECTION KIT IS DESIGNED TO GIVE EARLY WARNING OF THE DANGER OF OXYGEN DEFICIENCY IN THE WATER. BY IMPROVING THE OXYGEN LEVEL IN THE WATER THROUGH MECHANICAL MEANS, FISH MORTALITY CAUSED BY OXYGEN DEPLETION COULD BE SIGNIFICANTLY REDUCED." SAID.
DR.
MAK
THE SEMINAR ALSO FEATURES TALKS ON THE CHOICE OF AERATION DEVICE AND ON SECURITY IN FISH CULTURE ZONES.
1
/10
Page 10Page 11