<p><em>Tetragonula laeviceps</em> (Smith) is one of the most common species of stingless bees in Indonesia. However, only few publications available on the flight activity rhythms of the species. Research was conducted with the objectives to determine flight activity of <em>T. laeviceps</em> in relation to daily times and various weather elements. Three colonies of <em>T. laeviceps</em> were observed hourly for 5 minutes beginning at 06.00 a.m. until 06.00 p.m. Number of bees entering with pollen or resin, as well as exiting with waste were counted. Flight activity was significantly different (P < 0.001) among times of day. The preferential times (acrophases) of flight activities occurred at afternoon (11 a.m. to 12 a.m.). Number of entrance and exit flights positively correlated (moderate) with temperature and light intensity, while negatively correlated (moderate) with relative humidity. </p>
Tetragonula laeviceps (Smith) adalah salah satu spesies lebah tak bersengat yang paling umum dijumpai di Indonesia. Namun demikian, tidak banyak publikasi tersedia tentang ritme aktivitas penerbangan T. laeviceps. Penelitian ini bertujuan mengkaji aktivitas penerbangan T. laeviceps dalam kaitannya dengan waktu harian dan berbagai unsur cuaca. Tiga koloni diamati setiap jam selama 5 menit dari pukul 06:00 hingga 18:00 WIB. Pengamatan meliputi banyaknya T. laeviceps yang keluar sarang, masuk sarang, membawa polen, membawa resin, dan membuang sampah. Hasil penelitian menunjukkan bahwa aktivitas penerbangan berbeda nyata (P < 0,001) di antara jam-jam pengamatan. Secara umum, preferensi waktu (akrofase) aktivitas penerbangan terjadi pada pukul 11:00–12:00 WIB. Banyaknya T. laeviceps yang keluar dan masuk sarang berkorelasi positif (sedang) dengan suhu udara dan intensitas cahaya, tetapi berkorelasi negatif (sedang) dengan kelembapan relatif.
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