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Field evaluation of honeybee colonies (Apis mellifera L.) for selecting breeding lines
Akongte Peter Njukang,Park Bo-Sun,Jo You Young,Kim Dong-won,Kim Kyungmun,Oh Dae-Geun,Choi Yong Soo 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.2
Honeybees (Apis mellifera L.) are pollinators with immeasurable benefits, contributing to the human diet and economic sustainability through the production of hive products. Beekeepers are faced with the challenges of selecting desirable colonies for breeding. It is necessary to evaluate individual honeybee colonies to select breeding lines with high productivity. We bred honeybees in controlled mating stations and selected colonies with similar conditions and placed at the experimental apiary and used for this study. We studied the hygienic behavior of colonies using the pin-killed brood assay and evaluated the production of some hive products (royal jelly (RJ), propolis, and wax) without any adaptation of colonies. The percentage of dead brood removal varied significantly while larval acceptance rate was marginally significant between colonies. The weight of propolis, RJ and wax did not show any significant differences between colonies. RJ production differed between hygienic and non-hygienic bee colonies, with higher values recorded in non-hygienic bee colonies compared to hygienic bee colonies (1.61 ± 0.22 g and 0.78 ± 0.07 g, respectively). Non-hygienic colonies showed better performance in selection for comb-building and the production of RJ. The hygienic condition of colonies did not significantly influence the production of propolis and wax. Thus, it is necessary for beekeepers to evaluate individual colonies for selecting breding lines.
Status of Honey Bee (Apis mellifera L.) Industry in Cameroon: A Review Article
Akongte Peter Njukang,Dongwon Kim,Eun-Jin Kang,Hee-Geun Park,Yong-Soo Choi 한국양봉학회 2021 韓國養蜂學會誌 Vol.36 No.1
Beekeeping is one of the oldest environmentally friendly activities practiced in Cameroon. In Cameroon, beekeeping is an important livelihood activity especially to those not involved in agriculture and forest exploitation. It has contributed much in poverty alleviation and environmental protection through hive products and pollination respectively. Cameroon has five main agro-ecological zones with a diversity of melliferous plants species suitable for beekeeping. Despite the abundant resources, honey and other hives products extraction is still low. Amongst hive products, honey and bee wax are harvested by 100% and 94% of beekeepers respectively. Honey and bee wax production vary from region to region with Adamawa, Northwest, West and Southwest being the most production regions respectively. The price of honey varies from 1,200~2,500 FCFA and 2,000~4,500 FCFA for brown honey and Oku white honey respectively. The country is facing many constraints of beekeeping such as climate change and deforestation, poor hive management practices, pests, poor market system as well as many others. To overcome these challenges, beekeepers, together with the government are putting forward measures such as sustainable forest management through the Ministry of Forestry and Wildlife, and the practice of modern beekeeping techniques.
Pupa ( Apis mellifera L .) Rearing Conditions to Improve Queen Weight at Emergence
Peter Njukang Akongte,Olga Frunze,Dongwon Kim,Eun-Jin Kang,Bo-Sun Park,Kyung-Mun Kim,Yong-Soo Choi 한국양봉학회 2022 韓國養蜂學會誌 Vol.37 No.4
Queen quality depends on increased body weight at emergence, which is strongly affected by ecological factors during brood rearing; however, much remains undefined in terms of improving queen weight at emergence. We initially reared 12-20 h-old larvae in queenright (QR) and queenless (QL) colonies at temperatures of 28±2ºC and 70±6% relative humidity (RH) and 29±3ºC and 65±8% RH respectively, and later transferred 50% of the pupae into an incubator (34.7±0.42ºC and 80±5% RH). Queen weight at emergence was observed to be the highest in the QR and QL colonies of the incubator (217.36±5.51 mg and 199.61±4.24 mg, respectively) compared to that of QR and QL colonies (199.45±3.60 mg and 182.94±3.35 mg respectively) in the hives. Queen weight at emergence differed significantly among rearing groups (P<0.0001), whereas the difference in the emergence rate was insignificant. We observed that rearing queen bees initially from QR colonies and pupae in an incubator at an optimum and more stable temperature could be an advantage in improving queen weight at emergence. Further studies are needed to investigate their acceptance, mating, and reproductive success rates.
Olga Frunze,Peter Njukang Akongte,Dongwon Kim,Eun-Jin Kang,Bo-Sun Park,Kyung-Mun Kim,Yong-Soo Choi 한국양봉학회 2022 韓國養蜂學會誌 Vol.37 No.4
The larval nutritional state of the honey bees is controlled by the Royal Jelly. In addition, it stimulates the regeneration of tissues in other organisms, which has been one of the reasons it uses for cosmetics and as a nutritional ingredient. For the manufacturing and storage of products containing Royal Jelly, heat processing has played a significant role but it has not yet been clarified as a technical factor. The aim of the research was to investigate the effects of heating on the physiological activity of Royal Jelly. We studied the proteins at the native and denatured conditions using heating by the electrophoresis methods. Also, the experiments in vitro were applied when the diets included the non-heated and heated at 52, and 72°C Royal Jelly. The study determined that heating it at 52°C within 5 minutes didn’t change the visible protein composition. This diet was sufficient for the rearing of larvae and hatching of 78.7% against 83.3% of A. mellifera honey bees fed by the diet with non-heated Royal Jelly in the in vitro experiment. However, the weights of the hatched honey bees had significant differences (α=0.05) and were 97.42±14.45 and 102.09±12.49 mg, respectively. This study adds to our understanding of the upper limit of the heat resistance of Royal Jelly proteins by demonstrating the physiological activity of the components after heating at 52°C. So, this temperature can be applied in the protocol of the manufacturing of the Royal Jelly products.
Olga Frunze,Peter Njukang Akongte,Dongwon Kim,Eun-Jin Kang,Bo-Sun Park,Kyung-Mun Kim,Yong-Soo Choi 한국양봉학회 2022 韓國養蜂學會誌 Vol.37 No.4
Honey bees control the cast determination and colony development through the larvae’s nutritional state by the Royal Jelly (RJ). However, the study of RJ dominates for RJ production of Apis mellifera honey bees. In any other case, RJ secretion didn’t apply as a general selection characteristic to estimate the potential and to breed strong colonies. The purpose of this research was to relate the secretion of RJ against the different species and weights of grafted larvae of honey bees collected after 22 hrs. Larvae of different instars (0-2 days old) were grafted into queen cell cups and inserted into rearing colonies for the RJ collection within 22 hrs. The frames were later removed and taken to the bee breeding laboratory for measurements. It was found that the secreted RJ for feeding 1 mg A. m. ligustica larvae significantly differed from A. c. koreana: (57.84±23.32 mg) and (31.25±19.72 mg) respectively. Also, the group with the highest weight of larvae A. m. ligustica (16.04±5.66 mg) got significantly more RJ (147.94±30.04 mg) which was 2.59 times higher than that of larvae from the youngest group. These findings led us to understand that the weight of grafted larvae and species of honey bees influences the secretion of RJ into queen cell cups. Practically, this data can be used to estimate the RJ secretion by workers of honey bees in a short time to breed healthy strong colonies for different purposes.
Remote Honey Bee Breeding Center in the Wido Island, the Republic of Korea
Olga Frunze,Peter Njukang Akongte,Dongwon Kim,강은진,김경문,박보선,Yong-Soo Choi 한국양봉학회 2022 韓國養蜂學會誌 Vol.37 No.2
Queens of the honey bees (Apis mellifera and Apis cerana) are extremely polyandry and controlling their mating partners can be possible by having remote isolated mating stations (case study of the Wido Island in the Republic of Korea). This Island is some 14.6 km from the mainland, lacks indigenous honey bees, has an average size of about 11.72 km2, and suitable weather conditions for breeding during the months of May to September excluding the rainy month (July). It is an ideal position for mating of high-quality virgin queen bees with selected drones. Methods of the rearing virgin queen bees are presented and described on the numbers of pure bred colonies of honey bees. In summer 2021, 30 queen cells of Apis cerana were reared in the island while 25 cages of nuclei hives with honey bees and six drone populations of about 9,000 drones were shipped to the island for three mating sessions. Colonies were returned to the mainland three weeks after mating. Mating success was about 79% per mating session. The one-week interval between mating sessions was used to clean the island environment from aging drones. This information is vitally important to manage the controlled mating centers on remote islands because the Republic of Cameroon and Korea have islands that can be used by beekeepers as mating stations for breeding of the selected lines of honey bees.
A Review of Current Beekeeping Status in Uganda
Ogweng Geoffrey Ebuu,Peter Njukang Akongte,MinOo Hlaing,Daegeun Oh,Minwoong Son,Bo-sun Park,Su-bae Kim,You-young Jo,Changhoon Lee,Yong-Soo Choi,Dongwon Kim 한국양봉학회 2023 韓國養蜂學會誌 Vol.38 No.3
Beekeeping benefits agriculture across the globe due to the pollination services provided by honeybees. Therefore, the disappearance of honeybees may lead to the extinction of some important plant species. Most beekeepers in Uganda keep western honeybee (Apis mellifera) and are under the umbrella body called The Uganda National Apiculture Development Organization (TUNADO). TUNADO supports beekeepers with technology dissemination, bulking hives products, and ensures that the quality of hive products meets the specified standards of various markets. The beekeeping systems in Uganda comprise of traditional, transitional, and modern approaches, with 87% beekeepers practicing the traditional system. This preference for the traditional system is primarily due to its lower cost, the limited availability of materials for modern setups, and its ease of management. Uganda has the potentials for beekeeping due to its natural resources, the presence of wild colonies of honeybees, and government policies. Beekeeping has contributed to farmers’ livelihoods both economically and ecologically. However, they are faced with challenges of agrochemicals, low colonization rate and absconding, climate change, parasites, pests, diseases, and unskilled labor. Beekeepers are undertaking extensive education in colony management to overcome the challenges. It is strongly recommended that a training center for queen breeding/rearing should be established to foster honey research in the country.