JURNAL SAINS TEKNOLOGI & LINGKUNGAN

Brief Report on The Population Survey Long-tailed Macaque (Macaca fascicularis [Raffles,1821]) in West Nusa Tenggara, Indonesia

Islamul Hadi — 2024-09-30

Survey on the population and distribution of long-tailed macaque (Macaca fascicularis [Raffles, 1821]) in the administrative areas of West Nusa Tenggara Province have been conducted during June-July 2024 to examine the distribution and population status on the macaque. The on-road reconnaissance survey, interview and literature studies have applied to collect data. We recorded 6146 individuals from 307 groups of long-tailed macaques in eight regencies. Of the 6146 individuals of long-tailed macaques, 1532 individuals are recorded living in conservation area, while 4614 individuals live in outside conservation area, respectively. The number of individuals and troops of the monkey showed us the minimum number that can be recorded. Further study needs to be conducted in addressed to dig more information on the existence of long-tailed macaque in West Nusa Tenggara. Furthermore, population information and distribution of long-tailed macaques could be the basic knowledge on the population management efforts in the future.

Pendampingan Ibu Hamil Sebagai Upaya Meningkatkan Perilaku Kesehatan dan Persalinan di Fasilitas Kesehatan

Wilya Isnaeni — 2024-06-28

Low coverage of antenatal care (ANC) and mothers’ delivery conducted not in the health care facilities were two major problems related to maternal health care in of the West Nusa Tenggara Province. The accompaniment to pregnant women could be solution to prevent the risks of pregnancy by increasing the coverage of ANC and directing mother to deliver in health care facilities. This study aims to study the effect of mentoring pregnant women on maternal health behavior during pregnancy until delivery. A quasi-experiment study was conducted in two districts namely East and Central Lombok. Two public health centers ‘Puskesmas’ were selected in each districts. They differed as the intervention and controlled health centers. The criteria for the both health centers were having high number of pregnant women, but low coverage of maternal health services. The control health centers defined as having the closest distance from the intervention one. Study population of this study were all pregnant women in the study area. Sample were selected for those women with the gestational age of 24-26 weeks and willing to be accompanied further or neither not delivery. The total of 130 women were randomly selected from the study population. Results showed the accompaniment of pregnant women was able to increase the score of health behavior as compare to the control group. Pregnant women with accompaniment were 30 times higher chance of better health behavior (OR=30.89; 95%CI=10.72-84.40), and 3 fold prefer to deliver at health facilities (OR=2.89; 95%CI=1.16-7.21). Other positive impact of accompaniment was the obedience of iron pill at least 90 tablets, as well as food supplementation taken. Student accompaniment brought a positive impact to pregnant women on health behavior and delivery in health facility.

Karakterisasi Produk Metalurgi Serbuk Berbahan Limbah Aluminium Paduan dan Kaca

Anak Agung Alit Triadi — 2024-09-30

Aluminum alloy and glass waste is often found in the business of making display racks. It is necessary to do research on the utilization of waste into useful products. This study aims to determine the hardness and compressive strength of objects made of a mixture of aluminum alloy and glass using the powder metallurgy method. The first stage was making aluminum and glass powders up to 100 mesh in size, the next stage was mixing the powders (mixing) with time variations of 70 minutes, 80 minutes and 90 minutes with a composition of 80% aluminum and 20% glass. Then manufacture of specimens with a compaction load of 8 tons. Furthermore, the sintering process at a temperature of 500 oC with time variations of 60 minutes, 90 minutes and 120 minutes, then tested hardness and compressive strength. The results obtained from the hardness test and compressive strength test showed the highest value for the test object with variations in the stirring time and sintering time of 90 minutes. Based on the two-way ANOVA analysis, the mixing time and sintering time obtained the values of Fcount>Ftable, so that the mixing time and sintering time have a significant effect on hardness and compressive strength.

Perkembangan Morfologi dan Tingkah Laku Larva Ikan Tuna Sirip Kuning Yellowfin Tuna (Thunnus albacares)

Yuliana Asri — 2024-09-30

The yellowfin tuna (Thunnus albacares) is a pelagic fish with distinct morphological development and behavioral traits. Understanding the early stages of morphology and behavior in yellowfin tuna larvae is crucial for successful cultivation efforts, particularly during the hatchery phase. This study aimed to observe and document the developmental progression and behaviors of yellowfin tuna larvae at the Tuna Laboratory of Balai Besar Riset Budidaya Laut and Penyuluhan Perikanan Gondol, Bali. Yellowfin tuna larvae were reared in 700 L round tanks at a density of 10,000 larvae per tank. Larval rearing was monitored over a period of 13 days, specifically on days 1 (D1), 3 (D3), 5 (D5), 7 (D7), 10 (D10) and 13 (D13) post-hatching. Morphological changes in the larvae were observed over time. On day 1, the larvae were transparent and planktonic, with closed mouths and eyes and the presence of melanophore pigments in their bodies. By day 3, the larvae had opened their mouths and eyes, becoming capable of feeding. The mouth opening measured between 0.34-0.68 mm (90°) and 0.18-0.37 mm (45°) on day 5 post-hatching. As the larvae grew, improvements in swimming ability were noted, correlating with the development of the swim bladder, tail fin, and dorsal fin.

Kelimpahan dan Biomassa Ikan Karang di Kawasan Konservasi Perairan Gili Balu, Kabupaten Sumbawa, Nusa Tenggara Barat

Mahardika Rizqi Himawan — 2024-06-28

The Gili Balu Marine Conservation Area (KKP), located in Sumbawa Regency, West Nusa Tenggara, is ecologically and economically significant due to its rich coral reef ecosystems. This research aims to measure the abundance and biomass of reef fish in the KKP Gili Balu, which can be used as a basis for evaluating the effectiveness of conservation efforts in maintaining marine biodiversity. The Underwater Visual Census (UVC) method was used, recording types of reef fish at ten observation points. The results showed that the highest abundance was found on Mandiki Island, with functional fish abundance reaching 2973 ind/ha, followed by Pasareang Barat Island (1903 ind/ha) and South Kalong (1600 ind/ha). The biomass of functional fish also reflects their important role in maintaining the balance of the coral reef ecosystem. This research contributes to the scientific understanding of marine biodiversity in the KKP Gili Balu and provides a basis for sustainable conservation management efforts. Additionally, the research recorded the presence of several coralivorous and economically important fish species, although they tend to be smaller compared to functional fish. Economically important fish in the KKP Gili Balu waters were found only at four observation locations: East Belang Island, North Belang, Kenawa, and Southwest Namo. The highest value was recorded at Kenawa Island, with 93 ind/ha. These fish tend to be rare in this area, possibly due to past fishing practices.