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Lake Glenlyon Murray cod update
THE following dashboard pro- vides a sum- mary of Murray cod data from Lake Glen- lyon covering the past 10 years, from 2011- 2020.
2019, with a peak of 621mm in 2015.
with 44, M18 with 43, M15 with 38 and L17 with 35.
side the impoundment. The lake was at 0 percent for 27 days in May-Jun 2019, how- ever 11 fish tagged prior to that time have been recaptured since, suggesting a high sur- vival rate even at very
from Queensland and 35 percent from NSW. Most recaptures were by fishers from postcodes: 2478 from around the Ballina area in NSW with 10 fishers, 4305 around the Ipswich area with nine fishers, and 4207 around the Beenleigh area with five fishers.
As at November 18, the Glenlyon Dam level was at 14 per- cent.
The first trophy fish tagged over 1m was in 2015 at 1200mm and there have been a further three trophy fish tagged since then.
Annual growth cal- culated from tag re- captures at the end of year one was 145mm and at the end of year five was 340mm.
There were 45,000 fingerlings stocked from 2011-2018, with 0 in 2017 and 2018.
fishers recapturing fish, 65 percent were
Tagged fish were dominated by under- sized fish, with only 5.2 percent legal fish in 2012, while for the other years, legal fish have been less than 20 percent – except 2015 when it was 47.1 percent.
Of the 109 fish re- captured over the past 10 years, none have been recaptured out-
low water levels. From postcodes of
The average catch rate over the 10 years was 1.4 fish per fisher per day, and reached a low of 1.2 in 2011 and a high of 1.6 in 2017, with insufficient data for 2020.
There have been 479 fish tagged for 104 re- captures, with a high recapture rate of 21.7 percent over the past 10 years.
The average length of Murray cod has been steadily increas- ing – from 430mm in 2011 to 566mm in
During this period, fish have been tagged in length of growth period map grids M14 with 130 fish, K17
www.bnbfishing.com.au Bush ’n Beach Fishing, January 2021 – Page 91