Perilaku Pemilihan Makanan dan Pengenalan Anggota Koloni pada Semut Rangrang Oecophylla smaragdina

Weaver ants Oecophylla smaragdina are social insects that recognize nestmates using pheromone. This study analyzes the feeding behavior and nestmate recognition of weaver ants in the urban area of three different islands (Sumatra: Baturaja; Java: Banyuwangi; Papua: Sorong). The free ants were placed in the arena composed of chicken meat, sugar, bananas as the baits. Ten trapped ants were also located in the arena to explore the nestmate recognition between the free and the trapped ants. Five types of behaviors, i.e., approach, stalking, communication, competition, and agonistic, were recorded in 6 days. Food preferences were indicated by the number of conduct towards the feeding sites, and nestmate recognition was indicated by approaching the trapped nestmate. The results showed that the percentage of the approach behavior of free ants was the highest in the three islands but had no significant difference between Sumatra and Java and between Java and Sorong (p-value >0.05). However, the study showed significant differences for the other four behaviors observed. As predicted, the percentage of chicken meat foraged by the ants was the highest due to the carnivorous behavior. The free ants showed the nestmate recognition to the trapped ants in all behavior, except competition.

Paku Epifit pada Gymnospermae di Kebun Raya Cibodas

Epiphytic ferns can be found in host trees from the Angiosperm and Gymnosperm groups. Epiphytic ferns in Angiosperm plants host have been widely studied, but there is little known for Gymnosperm plants host. The aim of this study was to identify the species of epiphytic ferns in the Gymnosperm plants host at Cibodas Botanical Garden and to analyze the diversity of epiphytic ferns based on microclimate conditions and the surface texture of Gymnosperms plants host. Epiphytic ferns diversity data was obtained using purposive random sampling method. Factors that influence the occupancy of ferns are analyzed using Principal Component Analysis. Epiphytic ferns in Gymnosperm host at Cibodas Botanical Garden were identified as 18 species including 7 family. The most dominant species of epiphytic fern is Davallia denticulata (59.45%). Diversity of epiphytic fern on Gymnosperm at Cibodas Botanical Garden is moderate (H’ = 1.81).

Pembersihan Isi Sel Akar dan Jenis Warna Tinta untuk Deteksi Cendawan Mikoriza Arbuskula

Arbuscular mycorrhizal (AM) fungi form mutualistic symbiosis with root of host plant. Staining technique to detect AM fungi usually used hazardous chemical. The ink stain and vinegar were used as an alternative technique to replace trypan blue and lactic acid in root staining method. This study aimed to determine time for clearing root cell contents and ink stain type to visualize the best AM fungal structures within the root observed under light microscope. Pueraria phaseoloides var. javanica roots colonized by AM fungi were cut into 1 cm long, cleared in KOH solution and stained. Four clearing time were done vis 5, 10, 15 and 20 minutes, and four stains were used namely Shaeffer black ink, Parker Quink blue ink, blue stamp ink, and trypan blue. Twenty stained roots were taken randomly from each tratment, and observed. Root clearing process for 20 minutes showed the best result. Only Shaeffer black ink and trypan blue produced clear structure of external hyphae, internal hyphae, vesicles and arbuscules. Arbuscular structure stained only by Shaeffer black ink and trypan blue. This indicated that Shaeffer black ink could be used as an alternative stain to detect AM fungi within the root of host plant

Identifikasi Tumbuhan Penghasil Polen dari Madu Lebah Tanpa Sengat di Belitung

Stingless bees forage to the flower for nectar and at the same time, pollen also trapped in the body hairs of the bees. Mostly pollen was concentrated into the pollen basket and transferred to the pollen and honey pot in the stingless bee nest. Pollen is male gametophytes of seed plants which have various of shapes, sizes, and ornamentations. This palynology study was aimed to identify the plants of pollen source that were found in honey of stingless bee Heterotrigona itama and Tetragonula laeviceps in Belitung and to analyze characteristics of the pollen. Pollen was extracted from honey and conducted the acetolysis and identification of the pollen in honey. We found 11 and 19 plant species as pollen soirce in the honey of H. itama and T. laeviceps, respectively. Pollen from Macaranga tanarius (23.72%) and Cocos nucifera (22.53%) were the two most dominant species on the H. itama honey. Pollen from Ageratum conyzoides (16.36%) are most often found in T. laeviceps honey. The most common pollen in honey of H. itama and T. laeviceps were from Arecaceae with a total of three species. Pollen from plants with tree habitus is most commonly found in honey of both species of stingless bees.

Komposisi Jenis dan Struktur Vegetasi Tepi Hutan, Taman Nasional Gunung Ciremai, Jawa Barat

Mount Ciremai National Park has a high ecological function as a major catchment and water source areas. The objective of this research was to obtain information on floristic composition and structure in the edge forest of Seda Block, Mount Ciremai National Park. To carried out the research, the method used in the analysis vegetation was quadrat transect at an elevation of 602-614 m asl. The results showed that species composition dominated by the families of Euphorbiaceae and Moraceae, consisting of 3 stratas of heading A to C where strata A occupied by Elaeocarpus sp. (40 m) and Ficus involucrata (30 m). Ficus involucrata has the widest heading cover on the observation plot. The condition of the forest quantitative structure generally demonstrates good conditions by forming a reversed J curve, as well as a relatively moderate diversity of plant species and there are no species of plant that dominate the forest edges.

Perilaku Alami dan Tidak Alami Burung Kakatua Jambul Kuning (Cacatua sp.) di Animal Sanctuary Trust Indonesia, Jawa Barat

Cockatoo (Cacatua sp.) is one of birds that is widely distributed in Indonesia and often kept as pet, thus threatening the Cacatua population in the wild. Environmental condition may affect the behavior of Cockatoo. Some unnatural behavior may arise due to living in the captive. Different cage conditions may result in different behavior performance in Cockatoo. Research on daily behavior at animal rescue sites at ASTI Bogor has never been conducted. This study aimed to analyze natural and stereotype behavior of Cacatua sp. at animal rescue center due to foreclosure, and analyze the relationship between cage condition and environmental factors. This study used focal instantaneous sampling, using eight individuals Cacatua sp. Cacatua sp. in ASTI performed natural behavior more than unnatural behavior, therefore ASTI can be a good place for animal rescue. The dominant natural behaviors were Resting (Re), Preening (Pr), Feeding (Fe), Locomotion (Lo), and Fighting (Fg), while unnatural behaviors were play, bite, abnormal vocalization, feather picking and aggressive. There are no difference in behavior between male and female, and also behavior in the morning and afternoon (p>0.05), but cage condition had a significant effect to daily behavior of Cacatua sp. (<0.05).

Aplikasi Lactobacillus plantarum NHC6 dalam Jus Nanas

Probiotics are living microorganisms if consumed in sufficient quantities can be beneficial for health. One of the potential bacteria as probiotics is Lactobacillus plantarum NHC6 is a lactic acid bacteria isolated from pineapple juice. This study aimed to test the ability of L. plantarum NHC6 as a probiotic in pineapple juice. Probiotics were stored until four weeks under 4°C and 10°C which weekly is monitored data on the amount of microbes, pH, percentage of lactic acid, and total dissolved solids in fermented pineapple juice. The result shows, the shelf time for pineapple juice under 4°C has a lower microbial reduction time rather than the juice storage under 10°C. Probiotics shelf time predicted for 4°C storage was 28.32 weeks and for 10°C storage was 8.67 weeks after production. The changes in physical properties (pH, percentage of lactic acid, and total soluble solids) in 10°C storage is much faster than that off in 4°C, this happens because there is still metabolic activity by bacteria at that temperature.

Identifikasi Potensi Predator dan Hama pada Peternakan Kelulut (Hymenoptera; Apidae; Meliponini; Tetragonula, Lepidotrigona) melalui Pengamatan Cepat di Kabupaten Padang Pariaman, Sumatera Barat

Stingless bees have been considered as the excellent option in the apiary sector as they produce valuable products such as honey, bee pollen and wax. Apiary business with stingless bee at its core has shown progressive increment especially in West Sumatra. Therefore, to maximize the production of the stingless bee apiary, knowing detrimental predator or pest organisms as well as the way of managing them are essential. This article described potential predators and pests of stingless bee identified through rapid observation conducted on 14 April 2019 at a community apiary in Padang Pariaman Regency, West Sumatra. There were 17 predators and pests identified, consist of six bird species, five odonate species and six ant species. The predation, competition and disadvantage possibly emerge from the existence of these organisms around stingless bee apiary are discussed, along with the feasible mitigation effort.

Keanekaragaman Musuh Alami Koloni Lepidotrigona terminata Smith (Hymenoptera: Apidae: Meliponinae)

The research about types of natural enemies of stinless bees Lepidotrigona terminata had been conducted in West Java. All natural enemis were identified morphologically and their habitat. There were 687 individuals of 14 species of natural enemies obtained in this research, i.e., Pseudeuophrys sp., Heliophanus sp., Argiope versicolor, Plexippus paykuli, Marpissa sp., Parasteatoda tepidariorum, Tegenaria sp., Nasutitermes javanicus, Paratrechina sp., Polyrhachis sp., Paratrechina longicornis, Rhynchium haemorrhoidale, Hemidactylus frenatus and Hemidactylus garnotii. Based on observation, spider, ants, and lizard were the predators of stingless bee. The results are expected as data and knowledge in the conservation and cultivation of stingless bees.

Keragaman Pangan dan Status Gizi Pada Anak Balita di Kelurahan Pasirkaliki Kota Cimahi

Dietary diversity refers to an increase in the variety of foods across and within food groups capable of ensuring adequate intake to promote a good nutritional status. The purpose of this study was to determine the relationship of food diversity with the nutritional status of children under five in Kelurahan Pasirkaliki Kota Cimahi. A cross-sectional study with a simple random sampling method was conducted among 79 households having under five age children. Individual food diversity was measured using a dietary diversity score through questionnaire from FANTA Dietary Diversity Score Indicator Guide. Nutritional status of children under five measured by anthropometric measurement with indicator z-score of WHZ, WAZ, and HAZ. The analysis was carried out by Chi square test and fisher's exact. The average age of children under five is 31 months consisting of 43 boys (54.4%) and 36 (45.6%) girls. The prevalence of wasting children was 3.8%, stunting 21.5%, and underweight 10.1%. As many as 56 (70.9%) children consume diverse foods. There is no relationship between food diversity with nutritional status (p>0.05). Consumption of diverse food with appropriate amount of food portions are recommended for children under five years to get optimal nutritional status.