Beekeeping is an important activity to agriculture, food

security and biodiversity as well as it participates in reducing

poverty and boost livelihoods in rural areas worldwide

(Chazovachii

et al

., 2013; Gupta

et al

., 2014). It also contributes

in the agricultural production due to the essential role of

honey bees,

Apis mellifera

, in plants pollination as the

pollination of more than 90 crops depend mainly on honey

bees (Partap

et al

Socotra Island is characterized by a high level of endemism (37%) comparable with other oceanic islands such as Mauritius,
Galapagos and the Canary islands (Miller and Morris, 2004). Dracaena cinnabari (Agavaceae) (D. cinnabari ) is arguably the main endemic
flagship species of Socotra, commonly known as Damm Al-akhwain in Yemen. It is one of the six arboreal species (Dragon blood tree) of the
genus (Marrero et al., 1998). D. cinnabari is threatened for the collection of resins (Dragon blood). Dragon’s blood is a deep red resin, which has

Many studies have investigated the pollination
ecology and partitioning of pollinators of acacia
species from Australia, Africa, and Latin America
(Armbruster & Herzig 1984; Krüger & McGavin
1998; Stone et al. 1998, 2003; Tandon & Shivanna
2001; Tybirk 1993). However, the lack of sufficient
information on geographical variation in acacia
pollination ecology and timing of pollen release has
been identified as an important gap in our
knowledge (Stone et al. 1998). Particularly, despite

The problem of scheduling a given set of equipments in a single-stage, multi-item compatible environment, with the objective of maximizing capacity utilization is formulated as a maximal flow problem in a Multiple Arc Network (MAN). The production is usually planned against customers’ orders, and different customers are assigned different priorities. The model aims to provide optimal production schedule with an objective of maximizing capacity utilization, so that the customer-wise delivery schedules are fulfilled, keeping in view the customer priorities.