Browsing by Author "Lückstädt, Christian"
Investigations on the feeding behavior of juvenile milkfish (Chanos chanos Forsskål) in brackishwater lagoons on South Tarawa, Kiribati C Lückstädt & T Reiti -
Verhandlungen der Gesellschaft fur Ichthyologie, 2002 - Verlag Natur und WissenschaftThis study evaluated the feeding behavior of the milkfish (Chanos chanos Forsskål) in extensively managed brackishwater lagoons on South Tarawa, Kiribati (Central Pacific) in August 1998. Feed intake, dietary overlap, fish condition and morphometric intestine parameters were determined. The daily ration of fish was estimated using the ”modified Bajkov model”. Fish stomach content did not differ significantly between samples from day and night, but prey preferences showed significant differences (p < 0.05). Results were compared with a data set of juvenile milkfish from the Philippines raised under similar conditions.
Survey on the use of natural food and supplemental feed in commercial milkfish farms on Panay, Philippines C Lückstädt, U Focken, R Coloso & K Becker - In Deutscher Tropentag 2000: International Agricultural Research ; a Contribution to Crisis Prevention, October 11-12 2000, University of Hohenheim, 2000 - Stuttgart UniversityThis study evaluated the feed intake of the milkfish (Chanos chanos Forsskål) in commercial brackishwater ponds under different management regimes. Feed intake and growth were compared between a rather intensive culture management in a fish farm of 1 ha pond size and a semi-intensive one, with a total pond area of 30 ha. The data suggested a direct consumption of only 12 % of the supplemental feed in the intensive farm, leading to a wastage of high quality fish feed and a significantly lower specific and metabolic growth rate (P< 0.001) than in the semi-intensive system without any supplementation and only relying on abundant natural food through fertilization. These results suggest that a heavy reduction in, or even the abandonment of the use of, supplemental feed for milkfish culture would be more cost-effective.