Judul: Produktivitas Primer Kolam-kolam Persobaan yang Ditebari Ikan Nila (Oreochromis niloticus Trewavas) dan Dipupuk dengan TSP-Urea serta Pupuk Kandang di Stasiun Percobaan IPB Darmaga Bogor
Abstrak: Penelitian ini bertujuan untuk mengetahui peranan pemupukan serta kualitas air terhadap produktivitas primer kolam-kolam percobaan ikan yang ditebari ikan nila (Oreochromis niloticus Trewavas) Penelitian ini berlangsung dari balan Januari sampai Juni 1985 dewan menggunakan 12 buah kolam yang bedinding tembok, masing-masing berukuran 20 x 10 m2 dengan kedalaman maksimum 0.90 m. Swnber air yang digunakan berasal dari air yang langsung dari saluran irigasi serta air yang telah melenati kolam 'water conditioning system'. Sedangkan pupuk yang digunakan adalah campuran TSP-Urea dan pupuk kandang jenis kotoran ayam.
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Judul: Komposisi dan kelimpahan zooplankton di kolam-kolam budidaya ikan Nila (Tilapia nilotica L) di Dramaga yang dipupuk dengan TSP
Abstrak: Penelitian mengenai komposisi dan kelimpahan zooplankton di kolam-kolam budidaya ikan nila telah dilakukan mulai Desember 1983 sampai Maret 1984. Tujuan dari penelitian adalah untuk mengetahui komposisi dan kelimpahan zooplankton di kolam budidaya ikan nila yang dipupuk dengan TSP serta hubungannya dengan kandungan khlorofil-a dan laju pergantian air kolam. Pengambilan contoh zooplankton dilakukan sebulan sekali antara pukul 09.00 - 11.00 WIB, yang berasal dari 12 buah kolam yang dipupuk dengan TSP sebanyak 25 kg/ha/bulan.
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Judul: Distribution and Diversity of Ectoparasite Mites on Geckos in Indonesia
Abstrak: Data on the diversity and dispersal of parasitic mites on house geckos in Indonesia are very scarce. In this work, the distribution and diversity of mites living on three species of house geckos, namely Cosymbotus platyurus, Hemidactylus frenatus, and H. garnotii collected throughout Indonesia, has been elaborated. Geckos and mites were captured and immediately preserved in 70% ethanol. Whole mount of the mites was prepared by clearing in lactophenol followed by mounting on polyvinyl lactophenol solutions. The SEM preparation was conducted to examine the detail morphological characters of the mites. The results showed that among 448 individuals of geckos, 221 geckos were infected by Geckobia mites. Prevalences of C. platyurus, H. frenatus, and H. garnotii infested by mites were 14.8%, 50.69%, and 79.6%, respectively. Three different spesies of Geckobia (G1, G2, and G3) could be differentiated; and based on similarities of their morphological characters to ones described in published literatures, Geckobia G2 is Geckobia glebosum and Geckobia G3 is Geckobia bataviensis while G1 could not be identified to the species level. The highest mean intensity of Geckobia G1 infestation was found on H. garnotii (I=7.0), G. glebosum infestation on H. frenatus (I=3.5), and G. bataviensis infestation on H. garnotii (I=11.8). In general, C. platyurus was infested by the least number of mites. Geckobia G1 were found living on the skin folds on the claws, G. glebosum were found mainly on the body and thigh, and G. bataviensis were found on almost all parts of the host’s body. Geckobia mites are distributed randomly throughout Indonesian Archipelago, following the pattern of distribution of their hosts. So it is concluded that Geckobia G1, G. glebosum, and G. bataviensis are sympatric.
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