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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Produksi Tanaman Research Journal of Life Science Samakia: Jurnal Ilmu Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Mulyanto, Febri Dwi
Brawijaya University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Engineering Immunology & microbiology Library & Information Science Other

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Journal : Research Journal of Life Science

 1 
Analysis of Food Composition of Yellowstripe Trevally (Selaroidesleptolepis) In Paciran Waters, Lamongan, East Java Dwi Candra Pratiwi; Defri Yona; Mulyanto Mulyanto; Yusrina Rizqi Amalia
Research Journal of Life Science Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (820.355 KB) | DOI: 10.21776/ub.rjls.2016.003.02.1

Abstract

Paciran is one of the regions in East Java with great fisheries potential.  Yellow Stripe Trevally is well known for its abundance in waters and categorized as high economic value within fisheries commodity. The abundance of yellow stripe trevally highly depends on food availability within its living habitat. The aim of this study was to analyze yellow stripe trevally food composition and its relationship with plankton abundance. The result of this study shows that phytoplankton abundance (21,600x103cell/m3) was found higher than zooplankton abundance (9.093x103ind/m3). The highest abundance of phytoplankton was found in Bacillariophycae (21,552x103 cell/m3) and the lowest was found in Coscinodiscophyceae (48.197x103 cell/m3). Between two classes of zooplankton found in this study, the abundance of Maxillopoda class (8.184x103ind/m3) was found higher than Oligotriceae class (0.909x103ind/m3). The composition of plankton in the stomach of yellow stripe trevally have similar pattern with the compositions of plankton in the waters.Based on the calculation of electivity index, there were seven genus that have a value 0<Ei<1 and it was considered as food options of yellow stripe trevally. The selected food compositions were devided into six genus of phytoplankton, those were Asterolampra sp, Coscinodiscus sp, Cyclotella sp, Dinophysis sp, Oscillatoria. sp, Pleurosigma sp, Prorocentrum sp, and a zooplankton genus, Calanus sp. The result of main component analysis shows that water clarity parameter had significant impact on the water quality, while pH was correlated with phytoplankton abundance within in the Paciranwaters. 
The Effects of Fiddler Crabs (Uca sp) on C/N Ratio and Redox Potential of Soil in Mangrove Ecosystems Mulyanto Mulyanto; Herwati Umi
Research Journal of Life Science Vol 3, No 2 (2016)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (832.882 KB) | DOI: 10.21776/ub.rjls.2016.003.02.7

Abstract

Research has been done in Ketapang mangrove area of  Probolinggo city in months of September-November 2015. The objectives are to observe the fiddler crab community stucture and to analyze the effects of fiddler crabs on C/N ratio and redox potential of soil in mangrove ecosystems. The samples of fiddler crabs were taken during the low tides at 4 station (20 transects with sizes of 1 m2). Data of the fiddler crabs were measured from the soil digging insides the transect. The soil samples were taken from these crab holes wall (at the surface and at the depth of 20 cm), under the holes at the depth of 40 cm as well as from the locations that undwells by these animals at the same depth. The fiddler crab identified are U. Triangularis between 2 – 6 ind/m2, U paradussumieri 1 – 3 ind/m2, U perplexa 14 – 32 ind/m2, U dussumieri 12 – 27 ind/m2 and U. Tetragonon 3 – 6 ind/m2. The diversity is moderate (H = 1.7) and the dominance index was low (C = 0.37). C/N ratio soil were inhabited by fiddler crab between 6 – 14, the undwelled area were 14 – 20. Soil C/N ratio was inhabited by the fiddler crab at the surface and depth of 20 cm in average of 9 cm while at 40 cm in avergae of 12. The low of C/N ratio at surface and depth of 20 cm causing the organic matter turnover faster because the high nitorgen content. Soil potential redox (Eh) the undwelled areas was found –0.647 mV, meanwhile the soil Eh in the dwelled areas was positive (0.68 till 0.87 mV). This mean, the decpmposition was occured during aerobic condition and will produce untoxic subtances.
Co-Authors Agung Riswandi Defri Yona Dwi Candra Pratiwi Endang Yuli H H Hendra Haryono, M. Gandri Herwati Umi Nur Edy Suminarti Sudiarso, Sudiarso Sunardi, Sunardi Umi Zakiyah Vian Dedi Pratama Yuni Kilawati Yusrina Rizqi Amalia Zaenal Abidin