Judul: Penilaian Potensi Wilayah untuk Perencanaan Pengembangan Pertanian (Studi Kasus di Kabupaten Sanggau, Propinsi Kalimantan Barat)
Abstrak: Studi ini bertujuan untuk mengevaluasi kesesuaian dan ketersediaan lahan di wilayah studi serta melakukan penilaian potensi wilayah berdasarkan penilaian aspek-aspek kesesuaian dan ketersediaan lahan, kelengkapan prasarana pelayanan, aksesibilitas/tipe jaringan jalan dan kepadatan penduduk.
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Judul: Perencanaan Penggunaan Lahan Untuk Penembangan Pertanian Studi Kasus di Wilayah Kabupaten Pontianak Propinsi Kalimantan Barat
Abstrak: Lahan merupakan sumberdaya alam yang penting dalam pengembangan pertanian. Jumlahnya yang terbatas menuntut pemikiran yang seksama sehingga lahan dapat dimanfaatkan crest-a optimal dan lestari bagi pengembangan pertanian yang direncanakan. Untuk memperoleh pengembangan pertanian yang optimal, selain faktor fisik lahan, sangat perlu diperhatikan aspek tata ruang wilayah yang dapat mendukung pengembangan pertanian. Keterkaitan antara kondisi fisik lahan dan hubungannya dengan penyediaan faktor produksi dan pemasaran hasil usahatani, pada hakekatnya akan dapat mengungkapkan potensi wilayah untuk dikembangkan secara efisien.
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Judul: Mercury Toxicity and It’s Effect on Histopathology Change of Nile Tilapia (Oreochromis niloticus).
Abstrak: Nile tilapia (Oreochromis niloticus) is one of fish species that oportunity to contaminated with mercury. The effects of pollutants can damage living organisms organs and can cause death. The effects caused mercury had acute or chronic character. The aims of this study are to determine threshold and acute toxicity of mercury chloride (HgCl2) of Nile tilapia (Oreochromis niloticus), to assess the effect of mercury chloride (HgCl2) on several biometric parameters (survival, growth rate of average daily weighted, liver condition, bile and reproductive variability of Nile tilapia (Oreochromis niloticus), assess the level of damage to the histological structure of the gills, liver and kidney of Nile tilapia (Oreochromis niloticus) caused mercury chloride (HgCl2) exposure. This study was conducted from February to June 2013. Nile Tilapia (Oreochromis niloticus) were used in this study were female with average weight 20 grams or 11-13 cm length range. Toxicant materials used in this study was mercury chloride (HgCl2). Fish were reared in each aquarium 60x40x30 containing 48 liters of water. This study consists of three stages: a preliminary test, acute test, and sub-chronic test. To determine the changes in biometric condition of tilapia approximated by measuring the survival rate (SR), the growth rate of average daily weight , the content of mercury in the fish organs, hepatosomatic index (HSI), the relative bile volume (VER), gonadal soamtic index (IKG), fecundity and oocit diameter, tissue damage caused by mercury in fish organs by making histological preparations stained with hematoxylin and eosin. The median lethal concentration (96 hr, LC50) of Mercury Chloride was calculated as 1,64 mgL--1.The survival rate was highest in the control treatment (46,67 %) . Mercury chloride with concentration 0.196 mgL--1 show significant effect to changes HSI and relative bile volume, and oocyte diameter of Nile tilapia (p < 0,05). Mercury chloride with a concentration of 0,164 mgL-1 and 0,196 mgL-1 have not a significant effect on the growth rate of weight, gonadal somatic index and fecundity of Nile tilapia (p > 0,05). Mercury chloride cause damage to gills (hyperplasia, hypertrophy, proliferation and neukrosis), liver (hyperplasia, hemorhage, shrinkage of hepatocytes, proliferation and neukrosis) and kidney (hyperplasia, hemorrhage, shrinkage of the glomerulus, proliferation and neukrosis).
Keyword: Nile tilapia, Hepatosomatic indexs (HSI), histopathology