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All Journal Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal
Utojo Utojo
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Kondisi Terumbu Karang di Pulau Sembilan Kabupaten Sinjai Sulawesi Selatan Suharyanto Suharyanto; Utojo Utojo
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 3 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.3.178

Abstract

Sembilan Island waters is one of the catch fishery production centers in Bone Bay, South Sulawesi. It was informed that the capture has decreased since 1999, which might be caused by  coral reef damage although the damage precentage was still unknown. An observation on coral reef condition was conducted in the waters of Sembilan Island, South Sulawesi, on June and November 2000 using scuba diving set and under water writing tools. Monitoring of coral reef condition was conducted in 7 m depth up to 100 m length of shore line in seven stations employing a line intercept transect method. The data of coral reef were analysed by using dBase III and lifeform programs. The results showed that living coral around station I, III, and IV were generaly in good condition except in the stations V, VI and VII, which were in middle condition and in station II, which was in bad condition. The lifeform of coral reef in Sembilan Island were predominated by Acropora Branching (ACB), Nonacropora Branching (CB), Coreal Foliose (CF), and Coral Massive (CM) meanwhile other benthic fauna were predominated by Soft Coral (SF) and Sponge (SP).
Pengaruh Variabel Kualitas Air terhadap Produktivitas Udang Vaname (Litopenaeus vannamei) di Kawasan Pertambakan Kabupaten Gresik, Jawa imur A. Marsambuana Pirzan; Utojo Utojo
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 30, No 3 (2013)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2013.30.3.137

Abstract

Water quality variable to affect the productivity of Pacific white shrimp (L. vannamei) in the brackishwater ponds. Therefore the aimed of this research to study the water quality variable  to  influent on the productivity of Pacific white shrimp (L. vannamei) in the brackishwater ponds. The research was conducted in the brackishwater ponds area that were in fish farming operation in the brackishwater ponds in the brackishwater ponds of Gresik Regency, East Java Province by conducting interviews with respondents to obtained primary data in the brackishwater ponds productivity through the submission of questionnaires, while the technical data of water quality variable were obtained by direct measurement in situ. As independent variable were water quality variables, namely: temperature, dissolved oxygen (DO), salinity, pH, total suspended solid (TSS), turbidity, nitrate, nitrite, phosphate, and total organic matter (TOM) while the dependent variable was  the productivity of Pacific white shrimp. Regression model selection “best” method was based on the backward. The results showed that productivity of Pacific white shrimp in the range from 133.3 to 3,000 kg / ha with an average of  690.38  kg / ha. Water quality variables that a have positive effect on the productivity of Pacific white shrimp  were nitrate and phosphate, while water quality variables have a negative effect on the productivity of Pacific white shrimp. were pH and TSS.
Co-Authors A. Marsambuana Pirzan SUHARYANTO SUHARYANTO