KENANGA : Journal of Biological Sciences and Applied Biology

KAJIAN KARAKTER MORFOLOGIS LEBAH TANPA SENGAT PADA TUJUH KOLONI DI SIDO MULYO, PUNGGUR, LAMPUNG TENGAH

2025-03-05T16:10:23+08:00

Stingless bees are an abundant natural resource in various areas of the world. The utilisation of stingless bees is associated with their honey production. Therefore, stingless bees are widely cultivated in the community. The increasing number of cultivators also occurs in Lampung Tengah Regency. However, this increase in the number of cultivators has not been followed by research on the diversity of stingless bees, including based on their morphology. This research was implemented from May to August 2024. Explorative fieldwork was performed in Sido Mulyo, Punggur, Lampung Tengah. According to the findings of the exploration, samples were taken from seven different colonies. The samples were then observed on 11 morphological characters including (1) eyes, (2) forewings, (3) body colour, (4) thorax, (5) abdomen, (6) hammuli, (7) mesonotum, (8) mesoscutetellum, (9) propodeum, (10) hair on posterior hind tibia, and (11) elliptical disc on basitarsus. The observed samples are closest to the characteristics of species in the genus Heterotrigona (samples SK3, SK5, SK6, and SM1) and Tetragonula (samples SK1, SK2, and SK4) on the basis of morphological characters.

POTENSI KEBERADAAN ORANGUTAN DI HUTAN GAMBUT RAWA TRIPA - ANALISIS SARANG DAN POHON PAKAN

2025-02-04T23:36:43+08:00

The orangutan, a vital component of the rainforest ecosystem, is increasingly threatened by habitat loss and fragmentation. Identifying orangutan nests and feeding trees is an important elements in understanding the habitat's capacity to sustain this species. Using the transect method, this study was conducted on 40 grids out of a total of 623 grids in the Tripa area that are still covered by forest. This study aimed to record the presence of orangutan nests and identify various plant species that serve as food sources for orangutans. The result revealed the discovery of orangutan nests in 7 locations, most of which were categorized as type C (old) and type D (very old). A total of 13 potential orangutan food plant species were found in the Rawa Tripa forest area, consisting of the families Moraceae, Euphorbiaceae, Annonaceae, Myrtaceae, Myristicaceae, Apocynaceae, Piperaceae, Dipterocarpaceae, Urticaceae, and Pandanaceae. This suggest that these areas may have supported a significant orangutan population in the past, but their current activity appears to be declining. The findings underscore the need for conservation efforts, as the continued survival of orangutans is crucial not only for their species but also for the ecological health of the forests they inhabit.

SPESIES BURUNG (FAMILI MUSCICAPIDAE) DI KAWASAN WISATA BURNI TELONG KABUPATEN BENER MERIAH

2024-09-25T02:41:48+08:00

Birds play an important role as an ecosystem balancer through the process of seed dispersal, pollination, and pest control, thus helping to maintain the integrity of biological resources. This study aims to identify bird species from the Muscicapidae family and analyze their diversity in the Burni Telong Tourism Area, Bener Meriah Regency. The method used is point count with 10 observation points. Each point is observed for 20 minutes within a radius of 50 meters, with a distance between points of 200 meters. Species identification was carried out using a guidebook, the population was calculated quantitatively, and its conservation status was identified. The results showed that there were 33 individuals of brushbirds from the Muscicapidae family consisting of four species, namely the Mangrove blue flycatcher (Cyornis rufigastra), Little pied flycatcher (Ficedula westermanni), Grey headed canary flycatcher (Culicicapa ceylonensis), and the Matinan flycatcher (Cyornis sanfordi). These findings indicate that the Muscicapidae population in this area is still well maintained. Of the four species of flycatchers, only the Matinan flycatcher (Cyornis sanfordi) is included in the protected category based on conservation status.

KEANEKARAGAMAN GASTROPODA DI ZONA LITORAL PANTAI SEURUDONG KABUPATEN ACEH SELATAN

2025-04-15T14:07:08+08:00

This study aimed to determine the diversity of gastropods in the littoral zone of Seurudong Beach, Sawang District, South Aceh Regency. The research method used a combination of transect and quadrat methods. The research site was divided into 3 different stations. Each station consisted of 3 observation points, with each point placed 4 research plots. Transect lines were drawn from each point vertically from the coast. The transect line used measured 40x10 m, in each transect line there were 4 plots measuring 1x1 m which were placed intermittently with a distance of 10 m between plots. The data were analyzed using the Shannon-Wiener diversity index. A total of 882 gastropod individuals from 24 species and 13 families were found across the three research stations. The diversity of gastropod species found in the littoral zone of Seurudong Beach is in the medium category, with an H' value of 2.473. Environmental measurements recorded the following parameters: temperature (29–31°C), pH (7.9–8.5), and salinity (30–32‰). These values comply with the seawater quality standards established in Decree of the Minister of Environment No. 51 of 2004, indicating favorable and normal ecological conditions at the study site.

KEBERADAAN KARANG DI PERAIRAN PULAU NASI ACEH BESAR

2025-04-20T14:45:00+08:00

Corals are a type of aquatic biota inhabiting benthic environments, comprising diverse species with varying levels of presence. This research aimed to assess the number of species and the presence levels of coral species in the waters of Nasi Island, Pulau Aceh Subdistrict, Aceh Besar Regency. The research activities were conducted from July to August 2024. The methodology employed was a survey method. Data collection was carried out using a purposive sampling technique. The research area was segmented into three locations based on their geographical positions. Within each location, two observation stations were established. Each station consisted of ten research plots with dimensions of 2 m x 2 m. The number of coral species was analyzed descriptively, while the presence levels of coral species were analyzed using a presence index. The results of the study indicated that 35 coral species were found in the waters of Nasi Island, with the presence index ranging from 33.33% to 100%. Therefore, it can be concluded that the number of coral species in the waters of Nasi Island is considerably high, and the presence levels of coral species are highly variable, ranging from very rare to very abundant.