|Appears in Collections:||Aquaculture Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Triploidy induction in Nile tilapia, Oreochromis niloticus L. using pressure, heat and cold shocks|
|Authors:||Hussain, M Gulam|
|Citation:||Hussain MG, Chatterji A, McAndrew B & Johnstone R (1991) Triploidy induction in Nile tilapia, Oreochromis niloticus L. using pressure, heat and cold shocks, TAG Theoretical and Applied Genetics, 81 (1), pp. 6-12.|
|Abstract:||The results of a study aimed at the identification of treatment optima for triploidy induction in recently fertilised Oreochromis niloticus L. eggs by altering the intensity, duration and timing of application of pressure, heat and cold shocks are reported. Preliminary, but not directly comparable, trials suggested the following treatments to be close to the individual agent optima. Pressure: 8,000 psi 2-min duration applied 9 min after fertilisation (a.f.); heat: 41 °C, 3.5-min duration applied 5 min a.f., cold: 9°C, 30-min duration applied 7 min a.f. In a directly comparable trial in which the eggs of eight different females were separately exposed to the optimum shocks listed above, individual triploid yields were more variable following cold shocks and mean triploid yields were, therefore, higher following pressure and heat shock. These and other results obtained are presented and the light they shed on the timing of the second meiotic division in this species is discussed.|
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