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Sponge Diversity at Pecaron Bay Situbondo Based on Macroscopic and Microscopic Observation Setiawan, Edwin; Nurhayati, Awik Pudji Diah; Muzaki, Farid Kamal
IPTEK The Journal for Technology and Science Vol 20, No 4 (2009)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v20i4.20

Abstract

The sponge species diversity recruited insitu macroscopic observation i.e, underwater photograph for sponges species diversity and spicula microscopic examination for sponges order group specimens have been conducted at Pecaron Bay Situbondo. Seventeen sponges species have been identified out of twenty species. The microscopic examination showed that the Diactinal oxea types were dominant in our 13 samples whereas the monoactinal oxea and style were represented only with 7 samples. Moreover, diactinal type of spicula can be used as an order group of sponges species at Pecaron bay Situbondo.
Bioaktivitas ekstrak batang Xylocarpus granatum sebagai anti black spot alternatif pada Litopenaeus vannamei pasca panen Kartikasari, Lanny; Nurhayati, Awik Pudji Diah; Setiawan, Edwin; Hidayati, Dewi; Ashuri, Nova Maulidina; Saadah, Noor Nailis; Muzaki, Farid Kamal; Desmawati, Iska
Journal of Tropical Biodiversity and Biotechnology Vol 2, No 1 (2017): June
Publisher : Faculty of Biology, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtbb.16385

Abstract

This research was done to explore bioactivity of Xylocarpus granatum’s stem extract as tyrosinase inhibitor for alternative preventing black spot in Litopenaeus vannamei postharvest. In this research, extraction of bioactive compound from X. granatum stem was done by soaking the stem in 96% methanol for 24h at temperature 29°C. The methanol was evaporated by using rotary evaporator at temperature 50°C. The extract was dilute with distillate water at series of dilutions (10%, 30%, 50%, 70%, 90%, and distillate water as the control), and then immersing L. vannamei into X. granatum’s stem extract as much as 10ml for 6h, and finally the data analyzing use the Kruskal Wallis test and the Least Significant Difference (LSD) test with the degree of confident 95%. The result showed that X. granatum’s stem extract is able to prevent a black spot of L. vannamei after harvesting process. Furthermore, concentration of 10 % of extract is an effective concentration for preventing a black spot and the control has black spot 0.0360 – 0.0373 mm2.