|Appears in Collections:||Aquaculture Journal Articles|
|Peer Review Status:||Refereed|
|Title:||Reproductive response of Nile tilapia (Oreochromis niloticus) to photoperiodic manipulation; effects on spawning periodicity, fecundity and egg size|
Bromage, Niall R
|Citation:||Campos-Mendoza A, McAndrew B, Coward K & Bromage NR (2004) Reproductive response of Nile tilapia (Oreochromis niloticus) to photoperiodic manipulation; effects on spawning periodicity, fecundity and egg size, Aquaculture, 231 (1-4), pp. 299-314.|
|Abstract:||Nile tilapia (Oreochromis niloticus) has rapidly become an important species for aquaculture, although their intensive culture remains constrained by poor spawning synchrony and low fecundity, adding significant cost to hatchery production. Previous research has indicated that spawning synchrony may be improved in some fish species by photoperiod manipulation. There is limited information on the effects of photoperiod manipulation on tilapia. In this paper, the reproductive performance of 32 individually housed Nile tilapia was evaluated under four different photoperiods: short day (6L:18D), normal day (12L:12D), long day (18L:6D), and continuous illumination (24L:0D). Significantly larger eggs (P less than 0.05) were produced under normal daylength (12L:12D) compared to other treatment groups. Fish reared under long daylength (18L:6D) exhibited significantly higher (P less than 0.05) total fecundity (2408±70 eggs spawn-1) and relative fecundity (7.2±0.2 eggs g-1 body weight) concomitant with a significant reduction in inter-spawn-interval (ISI, 15±1 days) in comparison with the rest of the trials. This investigation shows that long daylength (18L:6D) helps improve some important reproductive traits in Nile tilapia, and suggests that such methodology may be used to alleviate the production problems caused by low fecundity and poor spawning synchrony, and thus play a valuable future role in tilapia culture.|
|Rights:||The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.|
|compos-mendozaetal_Aquaculture_2004.pdf||539.18 kB||Adobe PDF||Under Embargo until 31/12/2999 Request a copy|
Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.
This item is protected by original copyright
Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
If you believe that any material held in STORRE infringes copyright, please contact email@example.com providing details and we will remove the Work from public display in STORRE and investigate your claim.