Abstract
An experiment was carried out to determine the effects of dietary supplementation of Albizia lebbeck seed oil (ALO) on the fatty acid composition of weaner rabbits. 50 weaned rabbits of mixed breed and sexes, aged between 6-7 weeks with an average initial body weight of 460 ± 1.3 were randomly assigned into five dietary treatments of ten rabbits per group; each group was further divided into 5 replicates consisting of two rabbits each. Basal diet was formulated to meet the nutritional requirements of rabbits according to National Research Council [1]. Rabbits in treatment 1, 2, 3, 4 and 5 were supplemented with ALO at 0 %, 0.1%, 0.2 %, 0.3 % and 0.4 % respectively. Feed and water was given ad libitum and the experiment lasted for 12 weeks. The results showed that significant differences (P<0.05) were observed in saturated fatty acid (SFA), polyunsaturated fatty acid (PUFA) and omega-6/omega -3 ratio (n-6: n-3) values obtained. Rabbits fed diet containing 0.4 % ALO had the highest PUFA value (54.17 %), followed by T4 (53.01 %), T3 (45.13 %), T2 (37.61 %) and T1 (26.93 %) respectively. Similarly (n-6: n-3) composition in T5 (3.65 %) increased in T5 fed 0.4 % ALO compared with T1 (1.38 %) fed 0% ALO. Antherogenic index were significantly (P<0.05) different among the treatments. It can be concluded that supplementation of ALO at 0.4 % highly influenced the composition of fatty acid in rabbit meat.
Highlights
The leaf miner, a hispid beetle, is a serious defoliating pest of the oil palm
This study analyses temperature, rainfall, relative humidity, and leaf miner abundance records sampled in oil palm fields between 1976 and 1980 in the main station of the Nigerian Institute for Oil Palm Research (NIFOR)
Mathematical relationships between the insect stages and weather factors were developed indicating that pest predictions can be made for different leaf miner stages using their corresponding model equations giving specific values for rainfall and temperature
Summary
The leaf miner, a hispid beetle, is a serious defoliating pest of the oil palm. Leaf miner outbreaks are sporadic and difficult to predict. There is need for increased knowledge of the leaf miner and its dynamics to guide environmentally sustainable integrated pest management methods. A major ability of farmers to adapt to climate variability and change with respect to insect pest infestations will depend on knowledge of pest attacks in relation to climate variability and change. In order for farmers to move away from over reliance on pesticides, dependable tools to time pest management activities are needed. There is rapidly increasing understanding of how the climate is likely to change at the global scale under various emissions scenarios, what is less well understood is the magnitude of future temperature, rainfall and relative humidity changes at the local level, and how these are influencing agro-biological systems [1]. Knowledge of past systems is necessary to evaluate future events
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