The Effects of Fertilization and Water Management on Growth and Production of Nile Tilapia in Deep Ponds During the Dry Season

CRSP:   |  Region:   |  Topic:   |  Database:
Details

Author(s):
James S. Diana; C. Kwei Lin

Type of Document:
Scholarly Article

 

Publisher/Journal:
Journal of the World Aquaculture Society

Date of Publication:
n.d.

Place of Publication:
Not Available

Description

Abstract: Fertilization guidelines developed for shallow ponds (1 m) with controlled depths were tested in deeper (2.5 m) ponds to determine effectiveness of these guidelines for culture of Nile tilapia Oreochromis niloticus. Twelve ponds of 2.5-m depth were used in four treatments: (A) weekly fertilization with water addition; (B) weekly fertilization frequency dependent on nutrient concentrations, without water addition. Sex-reversed Nile tilapia were stocked at 2 fish/m2 with an initial weight of 15 g, and harvested after 234 d. Depth of water declined from 2.4 m to 1.6 m over the experiment in ponds without water addition. Fish growth rate was significantly higher in treatments A and B (0.86 g/d), than in other treatments, as in yield (3,830 kg/ha). Treatment C was lowest in growth (0.086 g/d) and yield (168 kg/ha), with treatment D intermediate. Fish growth rates and yields were strongly correlated to manure input (R2 = 0.89 and 0.94, respectively), and residuals were not correlate to any physical or chemical variables. Growth and yield in these deep ponds were somewhat lower than those in previous experiments for shallow ponds with regular water inputs. However, stagnant ponds did not accumulate nutrients and metabolites at rates higher than ponds were controlled water depths.

Additional Bibliographic Information

Coming soon

Send us your questions or comments

Your Name (required)

Your Email (required)

Comment

Please enter this text:
captcha

[current-page]