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All Journal Biosaintifika: Journal of Biology & Biology Education
Yuliawati, Astri
Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro
Agriculture, Biological Sciences & Forestry

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The Potency of Black Soldier Larvae (Hermetia illucens L.) as a Source of Protein for Livestock Feed Supriyatna, Ateng; Kurrahman, Opik Taufik; Cahyanto, Tri; Yuliawati, Astri; Kulsum, Yuni
Biosaintifika: Journal of Biology & Biology Education Vol 10, No 2 (2018): August 2018
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v10i2.14422

Abstract

Black Soldier fly larvae is an insect capable to convert organic waste into body biomass. The purpose of this research was to determine the productivity, mass balance of the consumption process, and content of protein and fat of prepupa which has a potency as a livestock feed. This research used 6-day-old larvae, they were fed with cassava skin that has been smoothed with a variety of feeding doses: 12.5; 25; 50; 100; and 200 (mg / larvae / day) with ratio of feed and water 2: 1. The results showed that the feeding of 200 mg / larva / day produced the best larval growth with biomass productivity of 1.54 mg / day, residue yielded of 67.1 mg / day. The organic waste was convertion into larvae biomass. In this study, approximately consumption process scale is feed successfully converted to biomass 2.77%, metabolism 6.98%, and 90.24% residue. Protein content is 25.7%. It can be concluded that the larvae are able to convert organic waste into high protein biomass and potentially being used as a livestock feed. This research acts a model to predict mass balance of substrates for feed. The benefit of this research is the science approach used in this study that can be used as a reference by researchers and the community to determine the biomass production of an organism.
Home Range Estimation and Food Plants Preference of Presbytiscomata at Situ Patengan Nature Reserve Widiana, Ana; Januari, R. Robbi; Hasby, Rizal Maulana; Yuliawati, Astri
Biosaintifika: Journal of Biology & Biology Education Vol 10, No 3 (2018): December 2018
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.944 KB) | DOI: 10.15294/biosaintifika.v10i3.13800

Abstract

Surili (Presbytis comata) is one of endemic primates of West Java whose existence is protected. The purpose of the research was to determine the estimated home range and the preferences of food plant of P. comata at Situ Patengan Nature Reserve, West Java. The home range was determined by the minimum convex polygon method by connecting the coordinates of the outermost entire outer area groups. Focal animal sampling and Ad-libitum methods were applied to obtain data of food preferences in details. The result showed that home range of several P. comata groupsat Situ Patengan Nature Reserve were varied. The home range of group A, B, C, and D were covering 3.52 Ha, 4.43 Ha, 3.76 Ha, and 3.14 Ha respectively, while the solitary individual has a  home range covering 2.64 Ha. There were 27 species from 16 families of plants that was directly consumed by P. comata. P. comata more often consumed Castanopsis javanica (10.07%), C. argentea (9.35%), C. tungurut (7.91%), Sloneasigun (7.91%), and Quercus sp (7.19%). This data can be useful as a reference in P. Comata population and habitat management especially in the area of Situ Patengan.
Co-Authors Ana Widiana Ateng Supriyatna, Ateng Januari, R. Robbi Kulsum, Yuni Kurrahman, Opik Taufik Rizal Maulana Hasby, Rizal Maulana Tri Cahyanto