ABSTRAKPenelitian ini bertujuan untuk mengetahui kondisi kualitas perairan pasca pembangunan Pelabuhan Tanjung Api-Api dengan mempelajari karakteristik fisika kimia perairan dan struktur komunitas zooplankton. Penelitian tentang kelimpahan dan keanekaragaman jenis zooplankton dilakukan melalui enam titik stasiun pengamatan di muara Sungai Banyuasin pada bulan April sampai Nopember 2009. Contoh air diambil pada kedalaman 1 m dari permukaan air dengan menggunakan kemmerer water sampler dan contoh zooplankton diambil dengan menggunakan ember 50 L pada permukaan perairan. Selanjutnya contoh air disaring dengan menggunakan plankton net dengan ukuran 25 µm. Hasil analisis kualitas air diperoleh nilai parameter (suhu, pH, NO 2 KEYWORDS: estuary, physical chemistry, zooplankton, Banyuasn RiverKarakteristik Fisika Kimia Perairan ..... Sungai Banyuasin, Sumatera Selatan (Prianto, E., et al.) PENDAHULUANZooplankton merupakan jasad renik atau organisme air yang memiliki peranan yang besar dalam rantai makanan, yaitu sebagai konsumer pertama yang memakan fitoplankton, selanjutnya zooplankton ini dimakan oleh organisme lain yang lebih tinggi tingkatannya seperti udang dan ikan (Soedarsono et al., 2002). Berbeda dengan fitoplankton, zooplankton memiliki alat gerak yang sangat kecil sehingga pergerakannya lambat dan terbatas. Pergerakan zooplankton dalam perairan lebih banyak dipengaruhi oleh arus. Jenis dan kelimpahan zooplankton dapat berubah-ubah sesuai dengan kondisi lingkungan perairan. Jenis yang dapat beradaptasi baik dengan lingkungannya akan mendominansi wilayah tersebut.Sungai Banyuasin di Sumatera Selatan saat ini telah menjadi pusat kegiatan masyarakat di sekitarnya, di antaranya kegiatan perikanan (penangkapan dan tambak udang), transportasi, perkebunan, pemukiman, dan industri. Meningkatnya intensitas kegiatan ini telah memberikan dampak yang
Perairan estuaria Sungai Musi merupakan daerah penangkapan ikan yang potensial di Provinsi Sumatera Selatan, sehingga di wilayah ini terjadi aktifitas penangkapan yang cukup padat. Akibatnya terjadi tekanan yang cukup besar terhadap sumberdaya ikan di kawasan ini. Fungsi ekologi estuaria sebagai spawning ground dan nursery ground mulai mengalami gangguan akibat intensitas penangkapan yang besar. Beberapa alat tangkap ikan yang tidak selektif beroperasi dalam jumlah banyak sehingga menyebabkan penurunan terhadap stok ikan. Akibatnya konflik pemanfaatan ruang sering terjadi antar sesama nelayan atau pengguna lainnya. Seperti konflik jaring trawl dengan gillnet dan pancing rawai dan konflik nelayan tuguk dengan pengemudi kapal. Untuk menyelesaikan konflik di atas dan menjaga kelestarian sumberdaya ikan di estuaria Sungai Musi, beberapa langkah pengendalian yang direkomendasikan adalah melakukan pengaturan penangkapan ikan, melakukan sosialisasi peraturan perikanan kepada masyarakat, meningkatkan kapasitas kelembagaan pengelolaan perikanan, pelarangan penggunaan alat tangkap tertentu, dan memberikan bantuan modal usaha kepada nelayan.Estuary of Musi River is a potential fishing areas in South Sumatra Province, so that in this region occur fairly heavy fishing activity. The consequence is a large pressure on fish resources of this region. The ecological functions of estuaries as nursery ground and spawning ground, begin to experience problems due to the large fishing intensity. Some fishing gear that does not selectively operate in large quantities resulted in a decline of fish stocks. As the result spatial use conflicts often occur between fishermen or other user, as examples is the conflict between trawl fishing with gill nets and longline operator and the operator of driver tuguk ship. To resolve the above conflict and preserve the fish resources in the estuary of the River Musi, a few recomendation that must be addressed several step must doing fisheries regulations to disseminate to the public, enhance institutional capacity for fisheries management, ban the use of certain fishing gear and provide venture capital assistance to fishermen.
The reference values of laboratory tests are affected by factors such as instruments and methods of tests, which are always beingdeveloped. For these reasons, each laboratory is recommended to determine their own reference values. To determine the reference valuesof complete blood count in healthy adult people, and compare them to the reference values which is taken from the references. A crosssectional study was conducted on 200 healthy adult people, aged 18-60 years, selected during blood donation. The eight haematologicalparameters were estimated using Sysmex Xt-1800i at Dr.Wahidin Sudirohusodo Hospital. The data were analyzed statistically by SPSS11.5 programs. The reference values of leukocyte, erythrocyte, haemoglobin, hematocrit, MCV, MCH, MCHC and platelet were: 4400 to10000 /µL; %:4.2–6.2 × 106/µL; &:3.8–5.5 × 106/µL; %:12.5–17.3 g/dL; &:11.8–15.4 g/dL; %:38.1–50.4 %; &:31.1–49.7 %; 80,1to 94,3 fL, 25,9–31,9 pg, 31,4–35,2 g/dL, and %:171.2–405.1 × 103/µL; &:191.8–441.5 × 103/µL, respectively. Significant differenceswere observed in the MCH and platelet values (p< 0,005). The values found in this study were similar to the reference value commonlyused in our laboratory, except for the MCH value which was lower and the platelet value which was higher..
Ethylene gas is often used in artificial ripening of fruit, including tomato. One of the physical characteristics which is influenced by ethylene application is the respiration rate. This research aimed to find out the effect of ethylene concentrations and exposure durations on the respiration rate of tomato in the ripening process. Ethylene concentrations of 100, 150, and 200 ppm and exposure time durations of 24, 48, and 72 hours were investigated in a 3×3 factorial design with three replications. Selected green mature tomatoes were exposed to ethylene gas, after being exposed were then loaded in the respirometer and stored in ambient room. Oxygen and carbon dioxide changes were monitored until the fruits were ripened. Using three-way repeated measurement analysis, it was found that the interaction effect of the treatments on the respiration rate only significant for time of measurements and exposure time durations (P<0.05). These finding confirmed that exposure duration was important to be considered in the application of ethylene. It could also be reported that exposure duration of 24 hours was significantly different with 48 and 72 hours, whereas these two later exposure time durations were not different.
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