Hasil Pencarian  ::  Simpan CSV :: Kembali

Abstrak :
Telah dilakukan penelitian tentang kepadatan dan indeks makanan terbesar kerang kima Tridacna maxima di perairan Pulau Pasumpahan dari bulai Juni-Oktober 2003. Lokasi pencuplikan kerang T. maxima dibagi atas tiga strata yaitu strata I (sebelah barat Pulau Pasumpahan yang terdiri dari rataan karang dengan padang lamun yang banyak), strata II ( sebelah utara Pulau Pasumpahan yang terdiri dari rataan karang yang didominasi oleh makroaiga) dan strata III (sebelah timur Pulau Pasumpahan yang terdiri dari ekosistem mangrove). Pada masing-masing strata diambil tiga individu kerang T. maxima. Kerang yang didapatkan diambil lambungnya kemudian isi lambung kerang T. maxima dianalisis. Hasil penelitian didapatkan bahwa komposisi makanan alami kerang T. maxima yaitu fitoplankton dan zooplankton. Berdasarkan strata pencuplikan sampel kepadatan makanan alami kerang T. maxima terbesar didapatkan pada strata III yaitu 1813,54 individu plankton/individu kerang dan terendah strata II yaitu 1256,52 individu plankton/individu kerang. Kepadatan makanan alami kerang T. maxima tertinggi berdasarkan kelas yaitu Bacillariophyceae, kemudian diikuti kelas Crustaceae dan terendah kelas Rotifera, Nilai indeks makanan terbesar yang tertinggi didapatkan dari kelas BaciHariophyceae yaitu 30,47dan terendah kelas Rotifera yaitu 0,93. Dari nilai indeks makanan terbesar didapatkan bahwa makanan utama kerang T. maxima adalah plankton dari kelas Bacillariophyeceae dan Crustacea.

---

The Density And Index Of Preponderance Of The Giant Clam (Tridacna Maxima) In The Water Pasumpahan Island, Padang City, West Sumetera. The research has been done about the density and index of preponderance of the giant clam Tridacna maxima in the water Pasumpahan Island from June to October in 2003. The giant clam T. maxima colletion sites in the water Pasumpahan Island were divided three strata i, e. strata I ( at west Pasumapahan Island still have coral reef with seagrass), strata II (at north Pasumapahan Island which the coral reef was dominated by macro algae), strata III (at east Pasumpahan Island with mangrove ecosystem). At each strata the giant clam T. maxima were collected hree T. maxima. The giant clam was taken its stomach and then the stomach of giant clam were analysed. Results of the research showed that the composition of the natural food giant clam were phytoplankton and zooplankton. Based on the samples colletion mat the highest density from natural food of giant clam T. maxima were found at strata III 1813.54 plankton/ shell individu and the lowest density of natural food of giant clam T, maxima were 1256.52 plankton/shell individu at strata II. The highest density of natural food of giant clam T. maxima based on class were Bacillariophyceae and then Crustacea and the lowest density were Rotifera. The highest index of preponderance was found from Bacillariophyceae (30.47) and the lowest were Rotifera (0.93). Food preponderance index was calculed to indicate that the phytoplankton of Bacillariophyceae (30.47) and Crustacea (27.41) were the most preference food by T. maxima.

Abstrak :
Kepadatan dan pertumbuhan kerang darah Anadara antiquata L. di kawasan Teluk Sungai Pisang Kota Padang, Sumatera Barat telah dilakukan dari Maret sampai Desember 2004. Kerang A. antiquata dikoleksi dengan metoda sistimatik sampling. Lokasi pencuplikan kerang A. antiquata dibagi atas tiga strata. Masing-masing strata dibagi atas 3 stasiun berdasarkan kedalaman. Hasil penelitian menunjukkan bahwa kepadatan tertinggi kerang A. antiquata ditemukan di stasiun 1 strata III yaitu 1.8 ind./m2 dan kepadatan terendah di stasiun 3 strata I yaitu 0.9 ind./m2. Laju pertumbuhan kerang A. antiquata yang tertinggi ukuran 3 cm yaitu 0,064±0,043 cm/ind./15 hari dan yang terendah ukuran 5 cm yaitu 0,009±0,011 cm/ind./15 hari dengan persamaan korelasi Y=0,087?0,0165X ; r=0,976.

---

The population density and growth of the cockle Anadara antiquata L. Pelecypoda in Pisang River bay area Padang city, west Sumatera. The research has been done from March to December in 2004. The cockles A. antiquata were collected with systimatic stratified method. The cockle A. antiquata colletion site were divided three strata. The each strata were divided three station based on the water depth. Results of the research showed that the higest density of the cockle A. antiquata was found at station 1 strata III (1.8 ind./m2) and the lowest density at the station 3 strata I (0.9 ind./m2). The higest growth rate of A. antiquata was the length 3 cm (0.064 ± 0.043 cm/ind./15 day) and the lowest growth rate was the length 5 cm (0.009± 0.011 cm/ind./15 day) with corellation similarity Y=0.087?0.0165X; r=0.976).

Abstrak :
Penelitian dilakukan dengan metoda survei dan kuisioner di kawasan estuaria Muaro Lamo Kambang, Kabupaten Pesisir Selatan Sumatera Barat pada Januari-Marct 2003. Sampel Neritima dikoleksi dengan metoda sistimatik sampling dan pola distribusinya diuji dengan Paired-Quadrat Variance Method. Metoda kuisioner dilakukan terhadap masyarakat yang mengambil dan mekonsurasi hewan Neritima (Siput). Hewan Neritima yang didapatkan diidentiflkasi di Laboratorium Ekologi Hewan, Jurusan Biologi Universitas Andalas. Dari hasil penclitian didapatkan empat jenis, dua jenis diantaranya yang dimanfaatkan oleh masyarakat yaitu Neritima turita dan Neritima squamipicta. Kepadatan populasi Neritima yang tinggi didapatkan pada daerah estuaria yang bersalinitas rendah. Penyebaran Neritima spp dari mulut muara sungai ke arah hulu yang masih ada vegetasi mangrove. Pola distribusi siput Neritima yang didapatkan mengelompok. Ukuran Neritima yang didapatkan yaitu panjang 3,10-22,7 mm dan lebar 3,00-14,4 mm dengan berat basah daging siput Neritima 0,05 - 5,1 g. Hewan Neritima yang dimanfaatkan masyarakat umumnya untuk dikonsumsi sendiri dan sebagian lagi dijual.

---

Population Study of the Snail of Neritima Spp (Gastropods) and it's Potential as a Source of Society Economics at Estuary Area Muaro Lamo Kambang, South Coastal, West Sumatera. The research has been done in 2003 with a survey method and an interview of the society at estuary area Muaro Lamo Kambang, the regency of south coastal, west Sumatera. The snails of Neritima were collected with a systematic method and their distribution patterns were proceeded with Paired-Quadrat Variance Method. The interview method was done toward the society that collected and consumes the snails of Neritima. They were found and identified at an animal ecological laboratory, Department of Biology, Andalas University. The research results that there are four species of snails, two of the species were consumed by the societies that are Neritima turiia and Neritima squamipicta. The highest density of the populations of Neritima was found at the estuary area in the low salinity. The Neritima spp. distributes from the mouth of the estuary to the upper of the estuary that have still vegetation mangrove. The distribution pattern of the snail of Neritima spp. was found in a group form based on Paired-Quadrat Variance Method. In generally, the length and wide of snails of Neritima spp. are between 3.10-22.7 mm and between 3.00-14.4 mm, respectively, with a meat wet heavy of the snails of Neritima spp is between 0.05-5.1 g. For the society, the snails of Neritima spp. is self consumed and the rest is for sale.