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DJAJASASMITA, MACHFUDZ
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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FAUNA MOLUSKA DI PERAIRAN TEPI DANAU SINGKARAK SUMATERA BARAT KOMPOSISI DAN KEPADATAN JENISNYA MARWOTO, RISTIYANTI M.; DJAJASASMITA, MACHFUDZ
BERITA BIOLOGI Vol 3, No 6 (1986)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v3i6.1329

Abstract

RISTIYANTI. M. MARWOTO & M. DJAJASASMITA. 1986. Competition and population density of the molhiscan fauna in Lake Singkarak, West Sumatera. Berita Biologi 3(6): 293 - 296.A study of the competition and density of the molluscan fauna of coastal water in Lake Singkarak, West Sumatera, has been carried out in October 1982. The molluscs collection consisted of 4 thiarids (Brotia costula, Melanoides granifera, M. tuberculata and Thiara scabra), 2 planorbids (Gyraulus feunerborni and G. sumatranusj, 1 bulimid (Emmericiopsis lacustris) and 1 corbiculid clam (Corbicula moltkeana).The stony and sandy coastal 2 water is dominated by B. costula (59/0.09 m ) 2followed by C. molticeana'(32/0.09 m ), E. lacus- 2 2 tris (31/0.09 m ), M. tuberculata (21/0.09 m ) 2 and the other species 1 - 10/0.09 m .The water quality (temperature 27.7°C, pH 6.3, alkalinity 88.5 ppm and disolved oksigen 7.95) and food (detritus and periphyton) seems to be adequate to wpport the molluscan life.
FAUNA MOLUSKA DI SEPANJANG DAERAH ALIRAN SUNGAI WAI SEKAMPUNG, LAMPUNG DJAJASASMITA, MACHFUDZ
BERITA BIOLOGI Vol 2, No 7 (1983)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v2i7.1408

Abstract

Lampung adalah salah satu daerah di Sumatra yang banyak mengalami pembukaan hutan dan pengeringan rawa, yang mengakibatkan menjadi rusaknya habitat dan karenanya berkurangnya lingkungan hidup faunanya. Di antara golongan binatang yang banyak menderita oleh perubahan ini, ialah moluska darat dan air tawar yang akan mengalami penurunan populasi, yang tidak mustahil akan berakhir dengan kepunahan. Untuk mendapatkan data fauna moluska dari daerah Lampung yang telah dan akan dibuka hutannya serta dikeringkan rawanya, maka dalam tahun 1974 - 1975 telah. dilakukan pengumpulan di sepanjang Daerah Aliran Sungai (DAS) Wai Sekampung.
KEONG GONDANG PILA AMPULLACEA : MAKANAN DAN REPRODUKSINYA (GASTROPODA : AMPULLARITOAE) DJAJASASMITA, MACHFUDZ
BERITA BIOLOGI Vol 3, No 7 (1987)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v3i7.1321

Abstract

M. DJAJASASMITA. 1987. The apple-snail Pilaampulacea: its food and reproduction (Gastropoda: ampullariidaej. Berita Biologi 3(7) : 342 - 346. The food and reproduction of the apple-snail Pila ampullacea have been studied in the laboratory, reared in aquarium, fed with dead papaya leaves (Carica papaya) and water hyacinths (Eichhomia. crassipes); shrimp crips and fish pellets which are fed by way of trial, were readily eaten.The eggs, 5-10 mm in diameter, are laid in clusters of 15-50 or more, on the aquarium walls about 10 cm off water level. In its natural habitat, in Lake Maja; West Java, the eggs clusters are found stickedon the stems of the kirai palms (Metroxylon rumphii) (which grow densely in the lake) about 75 cm above water level.In the ponds of the Bogor Botanical Garden, the egg cluster were attached on the stems of the aquatic plants (Cyperus papyrus, Hanguana malayana, Sagittaria lancifolia and Thali geniculata) 20-70 cm off the water edge.The egg cluster is covered by a calcareous layer, it is presumed, that this calcareous covering may absorbed dew/rain water, to prevent the eggs desiccating, Some egg clusters laid in the laboratory which are not provided by calcareous layer (it seems due to the physiological disturbance) were desiccating and failed to hatch. The females may deposit 1-2 egg clusters monthly in the rainy season, or may not at,all in the dry season. The peak of the spawning is coincided with the rainy season.
PENYEBARAN KEONG DAN KEPITING HUTAN BAKAU WAI SEKAMPUNG, LAMPUNG BUDIMAN, ARIE; DJAJASASMITA, MACHFUDZ; SABAR, FEIZAL
BERITA BIOLOGI Vol 2, No 1 (1977)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v2i1.1386

Abstract

Beberapa pengamatan telah banyak dilakukan orang terhadap bermacam-macam aspek ekologi binatang yang ada di daerah hutan bakau, di antaranya tentang zonasi,penyebaran, kelimpahan(abundance),kepadatan (density) dan Iain-lain.Pengamatan yang serupa telah dilakukan terhadap jenis-jenis keong dan kepiting, dengan mengambil tempat di hutan bakau Wai Sekampung (Lampung)antara bulan Oktober - Nopember 1975.Hal ini perlu dilakukan mengingat akan adanya perubahan lingkungan di daerah tersebut,dengan dibukanya hutan bakau.guna usaha pertambakan dan permukiman.Hasil pengamatan ini akan merupakan data dasar bagi komposisi dan penyebaran keong dan kepiting yang ada, sehubungan dengan adanya perubahan lingkungan pada masa yang akan datang.
Co-Authors Arie Budiman Feizal Sabar, Feizal Ristiyanti M. Marwoto, Ristiyanti M.