TY - JOUR AU - Pham Thai AU - Phan Ngoc AU - Ha Huong PY - 2021/08/10 Y2 - 2024/03/29 TI - The Studying the Biological Characteristics of the Stingless Bee Tetrigonilla Collina Smith 1857 (Apidae: Melipona) in Hanoi, Vietnam JF - Vietnam Journal of Agricultural Sciences JA - vjas VL - 4 IS - 2 SE - ANIMAL SCIENCE – VETERINARY MEDICINE – AQUACULTURE DO - 10.31817/vjas.2021.4.2.07 UR - https://vjas.vnua.edu.vn/index.php?journal=vjas&page=article&op=view&path[]=236 AB - Stingless bees are distributed in tropical and subtropical regions. There are over 16,000 species of stingless bees around the world, among which, 42 species are from Asia (Kerr & Maule, 1964). Sixteen species of stingless bees have been identified in Vietnam (Sakagami, 1975; Sakagami, 1978; Engel, 2000; Chinh et al., 2005; Rasmussen, 2008). In this study, the biological characteristics of Tetrigonilla collina, as a representative for Southeast Asian stingless bees, were observed and recorded. The worker cell dimensions were 5.30 ± 0.34mm in length by 4.28 ± 0.37mm in width with a volume of 45.02 ± 5.74mL (food volume: 19.05 ± 3.5mL; ratio: 42.27%). The new cells were mostly built in the morning (from 2:00 to 10:00 am) and the queen laid eggs (2.52 ± 0.81 sec per egg) and capped the cells in the afternoon (from 12:00 to 17:00 pm). The average worker-cell building period was 12.03 ± 3.78 hours. Mainly, six of first ten bees that inserted made food discharges in a cell. The food discharge occurred in a very short time, which was 1.58 ± 0.6 minutes. The new cell numbers of the colony were reduced at the end of the experimental period. ER -