Suchergebnisse

The current experiment was conducted in the Fish Laboratory belonging to Aquaculture Unit, Agriculture College, Basrah University. At the beginning of feeding experiment average larvae weight was 0.031 g. Common carp (Cyprinus carpio) larvae brought from Fish Hatchery of Marine Science Center. The experiment used to detect the protein ratio effects on growth and survival of common carp larvae. Three fish feed with protein ratio (T1 35, T2 40, T3 45)% and only fish meal of 55% protein (T4) were used to feeding 25 larvae in each aquarium to satiation six days a week. Twelve aquaria with dimensions of 60×40×30 cm were used for current experiment. Feeding experiment lasted for 54 days from 10th may to 3th July 2022. Results of current experiments revealed that the highest growth criteria were achieved by larvae fed on diet with protein ratio of 40% followed by larvae fed on diet with 45% protein ratio, while lowest growth criteria achieved by larvae fed on fish meal only. Highest survival rate (96.0%) was achieved by larvae fed on diet with 45% protein ratio and lowest survival rate (78.7%) was achieved by larvae fed on diet with 40% protein ratio. There were significant differences P≤0.05 between T2 with T3 and T4 in the survival rate, while there were no significant differences P≥0.05 between T1, T3 and T4.

Environmental behavior (EB) is a kind of organizational behavior that seeks to protect the natural environment and conserve resources, such as saving energy, recycling wastes, duplex printing, reducing water use, non-smoking in the workplace, and designing environmentally friendly products. This study aims to identify the degree of environmental behavior practice and examine its constraints in Saudi government agencies. This study is based on a single design of cross-sectional research. 436 responses were collected from employees of government agencies in Saudi Arabia. The study results indicated that the EB practice is generally high in government agencies.Furthermore, the results revealed that female employees in government agencies have no statistical difference from male employees. In other words, the EB practice of men and women in government agencies is equal. The study also found a significant difference between married, unmarried, and divorced groups. Divorced employees report a higher level of EB than other employee groups. However, the study indicated a significant difference between the high school, graduate, and postgraduate groups. In other words, employees with high school education have a higher level of EB. Receiving and not receiving leadership support have a significant difference, whereas employees who received environmental training reported higher levels of EB than others. The outcomes also indicated a difference between the group of employees who have religious values. The outcomes of this study may be of benefit to researchers, regulators, policymakers, managers, and governors.
AcknowledgmentThe author thanks the Deanship of Scientific Research at King Saud University for supporting this study.