EFFECT OF DRIED DUCK MANURE (DDM) LEVELS ON GROWTH TRAITS OF COMMON CARP

AFIFI, EZAT A.; HAFEZ, FATMA A.; SOLIMAN, ALICE F.; ABU-SEEF, RAMADAN A.

doi:10.21608/ejar.2000.322524

EFFECT OF DRIED DUCK MANURE (DDM) LEVELS ON GROWTH TRAITS OF COMMON CARP

Document Type : Original Article

Authors

¹ Faculty of Agriculture, Moshtohor, Zagazig University, Banha Branch, Egypt

² Central Laboratory for Aquaculture Research at Abbassa, Agricultural Research Centre, Ministry of Agriculture, Dokki, Giza, Egypt

10.21608/ejar.2000.322524

Abstract

This study was conduced during a period from May 25th 1993 to December 1st of the same year on common carp fish using twelve 5 50 m2 concrete ponds with earthen bottom at Abbess* farm which be. kings to Cenral Laboratory for Aquaculture Research (C(AR). Agricultu‌ral Research Cornier. II was undertaken In order to Investigate the ef‌fect of DDM love's on growth trails and the -rotations among them at different post-stocking stages of growth. The twelve ponds were divid‌ed into four groups Ohre* ponds/group) assigned for the treatments (zero, SOO, 750 and 1250 kg DDM per 1050 m2). Results are summar‌ized as follows: • Actual means of body weight and body length of common carp in‌creased successively with advance of period of the study from stock-Mg up to 180 days post-stocking. Those of condition factor fluctuat‌ed with advance of that period but showed in general a decreasing trend. • Level of duck manure constituted a significant (N0.05, Pc0.01 or P40.001), important and sizing soucre of variation in body weight. body length and condition factor at all or most post-stocking growth stages. • Body weight and body length Increased wen the Increase of duck me nure level from zero to 120 kg /1050 m2 at all post-stocking stages of growth. - Specific growth rate % values evaluated during summer months were generally higher than those evaluated during autumn months. - Specific growth rate % ranked the first for fish ponds manured with 1250 kg duck Menem/10SO m2. then. followed in a descending order by fish ponds manured with SO, 500 and zero kg per 1050 m2. A strong positive significant (P40.01) phenotypic association (r v 0.78-0.98) between body weigh and body length was detected at most stages studied. - A negative association bettween condition factor and each of body weight and body length was found at most stages Studtc.d. - Prediction equations for body weight at 90 and 180 days post-stocking through the knowledge of body length at these two stages were formulated.