5 December 2009 Bulletin 157

STOCKED BARRAMUNI GROWTH Tag details Recapture details GULF OF CARPENTARIA Tag J78368 WEIPA Species Barramundi (Lates calcarifer) NORMAN RIVER Date 23/2/2001 4/10/2009 Length 415mm 630mm LAKE BELMORE

LAKE FRED TRITTON Location Mission River Mission River

NORTH Fisher Trevor Inskip Nicole Clegg

LAKE TINAROO Days Out 3145

BARRON RIVER Growth 215mm (25mm/year)

TRINITY INLET Movement 10km up river

MULGRAVE RIVER Released Yes

JOHNSTONE RIVER ROSS RIVER Tag details Recapture details HAUGHTON RIVER Tag K87799 BARRATTA CREEK Species Barramundi (Lates calcarifer) CHARTERS TOWERS WEIR Date 11/10/1999 28/9/2009 CLARE WEIR Length 340mm 620mm LAKE PROSERPINE Location Young Creek Young Creek Fisher Darren Wheate Simon Barlow FITZROY SALT Days Out 3640 FITZROY FRESH Growth 280mm (28mm/year) HELDOW CREEK Movement 4km up creek MOURA WEIR Released Yes BEDFORD WEIR Two long term recaptures of Barramundi at Weipa. LAKE CALLIDE Both have low growth rates which is typical of most Barramundi in that area. The graph shows the LAKE CALLEMONDAH annual growth of long term (over 3,000 days) RAILWAY DAM

MARY/BURNETT recaptures of fish that were less than 580mm (legal

MARY RIVER size) when tagged.

LAKE LENTHALL 100 0 100 200 300 400 500 ANNUAL GROWTH RATE (MM) 90

80 The above graph shows the average growth ) 70 M

rates for Barramundi stocked in a number of M ( 60 impoundments compared with natural R A WEIPA FISH E

Y 50 systems in the same area (shown in red). / H This shows that fish in the Weipa area have T

W 40 O

the lowest overall growth rates of any area R examined. The high growth rate for Lake G 30 WEIPA FISH Fred Tritton at Richmond results from small 20 WEIPA FISH

fish recaptured within a year of being tagged 10 and the average growth there will likely BARRAMUNDI GROWTH/YEAR decrease over time. 0 0 1000 2000 3000 4000 5000 6000 7000 DAYS AT LIBERTY

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