It has been reported that Styrofoam can be biodegraded by Tenebrio molitor beetle larvae within a retention time of less than 24 h and the larvae fed solely with Styrofoam able to survive for more than a month. The question is whether Styrofoam can be used as an economical feed in the cultivation of mealworms? To determine productivity effect of Styrofoam feeds on mealworms, the larvae (n = 120) were grouped into three. Group 1, 2 and 3 were cosecutively fed with yeasts (as the standard diet), Expanded Polystyrene (EPS) and Extruded Polystyrene (XPS) were used. The observations take place in two stages. At stage 1, measurements were made on percent survival of the caterpillar, larval weight, prepupal periods, pupation periods, pupal weight and imago weight. At stage 2, the imago emerged from the pupae were separated between males and females and then mated. The number of eggs laid by the imago females in ten days are noted. The results showed, in comparison to the standard diet, EPS and XPS foam feeds did not give a significant effect on the mortality of the larvae. Both types of Styrofoam promote a significant longer periods of prepupal and pupation and significantly reduce number of eggs. Compared with yeasts and EPS foam, only XPS showed a lower weight of larvae, pupae and imago. It is inferred that the Styrofoam is not worthy as economical feeds in mealworms cultivation. However, given that Styrofoam feeds can maintain the insects life and produce eggs, the use of mealworms in polystyrene foam waste degradation is still worth considering.
Aims: To find out whether flavonoid-rich fractions of aqueous and methanolic extracts of gamal plant leaves, Gliricidia sepium (Jacq.) Kunth ex Walp., can be used for eradicating coffee mealybugs, Planococcus citri Risso. Study Design: Completely randomized design using five concentration levels repeated three times.
Analysis of Content (Pb) in Hair Tire Repair Shop Workers and Golden FishAlong The Soekarno-Hatta Bandar Lampung with Atomic Absorption Spectrophotometry. Lead is often referred to as a lead or of lead, the metal is denoted by Pb. Heavy metal lead can cause poisoning and accumulate in the human body. Process of entry into the body can lead through food and drink, the air and the penetration of the skin. Absorption through the skin may occur due to these compounds soluble in oils and fats. Lead through the air into the respiratory tract to be absorbed and binds to lung blood is then circulated to all the tissues and organs of the body, while by foods possible cause fish was foods source of protein had bepouled of lead. On the hair can be bound to sulfhydryl groups so that the lead content in the hair can be an Proses masuknya timbal ke dalam tubuh dapat melalui makanan dan minuman, udara, dan penetrasi pada kulit. Penyerapan lewat kulit ini dapat terjadi disebabkan karena senyawa ini dapat larut dalam minyak dan lemak. Timbal melalui udara masuk ke saluran pernafasan akan terserap dan berikatan dengan darah paru-paru kemudian diedarkan ke seluruh jaringan dan organ tubuh, sedangkan lewat maknan dapat terjadi karena makana khusunya ikan sebagai sumber protein telah terpapar timbal. Pada rambut timbal dapat terikat pada gugus sulfhidril sehingga kandungan timbal pada rambut dapat dijadikan indikator pencemaran timbal. Penelitian ini bertujuan untuk menganalisis kadar timbal pada rambut pekerja bengkel tambal ban dan ikan mas yang dipelihra di sepanjang jalan Soekarno-Hatta Bandar Lampung. Pemeriksaan dilakukan secara analisis kuantitatif menggunakan Spektrofotometri Serapan Atom. Pada penetapan konsentrasi timbal secara Spektrofotometri Serapan Atom diperoleh persamaan regresi linier larutan standar timbal yaitu y : 0,0100x-0,00933, koefisien korelasi (r x,y ) sebesar 0,999. Timbal memberikan serapan maksimum pada panjang gelombang 283,3 nm. Hasil penelitian menunjukan bahwa pekerja bengkel tambal ban positif telah tercemar timbal. Kadar timbal tertinggi yaitu 4,813 ppm sedangan kadar timbal terendah 0,258 ppm. Pada insang dan daging ikan kadar tertinggi 0,15878 dan 0,1160 ppm, kadar terendah 0,11636 dan 0,0539 ppm.
<p>Taurine in diet affected increasing in body weight and length as well as survival rate of juveniles or adults of many marine fishes. It is explained that taurine presumably increased in their ability to tolerate the hypertonicity of seawater as well as to improve their metabolism which leaded to induce maturation. In order to elucidate the effect of taurine physiological universally in the fishes, early study was conducted on freshwater fishes namely gourami (Osprhonemus goramy) and tilapia (Oreochromis niloticus). The growth was determined by their body weight and morphological changes included the length and width of their body. The reproductive status was determined by measuring fish gonadosomatic indexes (GSI) (only for tilapias). Eight experimental groups were chosen consisted of two groups with commercial fish food with and without taurine and two groups with natural fish food (consisted of 50% Xanthosoma sagittifolium) with and without taurine. Amount of taurine given was 0.4 mg/fish/day. Complete randomized design with factorial 2x2 was applied to this study with 40 gourami juveniles (@ 7 grams in weight) and 40 tilapias (@ 50 grams in weight) were used for the experimental units. The study was conducted in 2 months. Analysis variances and LSD and/or t-test at 5% were used to determine the differences among experimental groups. The results indicated that taurine groups increased their body weight for 25-66% compared to the control (no taurine) as well as their body length and width (p< 0.05). Yet, the GSI of tilapias was not shown any significantly different. In this early study we indicated that taurine affected the growth in juvenile gourami and tilapia. However, further experiments related with physiological changes and reproductive status was still needed to complete the study. </p><p><strong>Keywords</strong>: Taurine, gourami, tilapia, growth rate</p>
Monyet ekor panjang (Macaca fascicularis) adalah primata yang mudah beradaptasi dengan aktivitas manusia. Jenis monyet ini mudah dijumpai di kawasan hutan yang dekat dengan kawasan pemukiman, perladangan, dan perkebunan, contohnya adalah area Youth Camp di Taman Hutan Raya Wan Abdul Rachman di Kabupaten Pesawaran, Lampung. Penelitian ini dilaksanakan menggunakan Metode Observasi dari bulan Agustus sampai September 2012 di areal Youth Camp Taman Hutan Raya Wan Abdul Rachman Lampung. Parameter yang diamati adalah saat monyet istirahat (immobile), yaitu diam, berdiri, duduk, tidur, serta posisi saat mencari lokasi untuk tidur pada suatu pohon sehingga dapat diketahui jenis pohonnya. Data yang terkumpul diinterpretasikan secara deskriptif. Terdapat enam jenis pohon yang digunakan untuk tidur yaitu bambu (Bambusa sp.), dahu (Dracontomelon dao Merr. Et Rolfe.), ki hujan (Samanea saman (Jacq.) Merr.), pulai (Alstonia pneumatophora Back. Ex don Berger.), dadap (Erythrina variegate L.), benda (Artocarpus elasticus Reinw. ex Blume). Pohon untuk tidur monyet ekor panjang berkarakteristik tinggi dan memiliki tajuk yang luas, serta dekat dengan sumber air.
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