11 research outputs found
Beberapaaspek Biologiikan Bijinangka Upeneus Moluccensis Blkr. Diperairan Teluk Labuan, Banten [Some Biological Aspects of Goldband Goatfish, Upeneus Moluccensis Blkr. in Labuan Bay, Banten]
No full textPenelitian dilakukan di teluk Banten dari bulan April-Juni 1999. Ikan yang diamati berjumlah 382 ekor yang terdiri atas 170 ekor jantan dan 212 ekor betina. Komposisi jumlah ikan jantan dan betina menunjukkan rasio kelamin yang tidak seimbang. Ikan dengan panjang 99 -170 mm mendominasi hasil tangkapan. Ikan jantan diduga pertama kali matang gonad pada ukuran 120 mm dan ikan betina pada ukuran panjang 125 mm. Fekunditas ikan biji nangka berkisar antara 19.116-89.344 butir. Ikan mempunyai sifat pemijahan total. Pertumbuhan ikan bersifat isometrik. Ikan ini termasuk karnivor dengan makanan utama udang dan ikan
Habitat Ikan Pelangi Arfak (Melanotaenia arfakensis ALLEN) Berdasarkan Tahap Perkembangan di Sungai Nimbai dan Sungai Aimasi, Manokwari
No full text<em>The habitat ontogeny of arfak rainbowfish (Melanotaenia arfakensis) in Nimbai and Aimasi streams, Prafi river system were studied from June to December 2007.&nbsp; Sampling was carried out monthly in four different habitat types using hand net. Slow littoral and medium littoral are two habitat types which characterized by slowly water velocity, availability of submerged vegetation and warmer temperature, however the run and pool areas have higher water velocity and dissolve oxygen. The former habitats are essential for all developed stages, i.e. feeding, spawning and nursing of this species. On the other hand, the later habitat types particularly were only for young and adult fish, due to their swimming abilities as well as maximize of oxygen uptake. In order to maintain the population of this species, conservation is needed to all of their natural habitats for continuing their life cycles.</em></jats:p
Fish Fauna in Gunung Halimun National Park and the Adjacent Area
No full textGunung Halimun National Park is known to be the area of head waters of a number river systems originate. However,there has been no information on fishes diversity at this area.In this regard, a series of ichthyofauna study was conducted from 1996 to 2000. Thirty seven species belonging to 13 families and 26 genera have been found in the rivers and streams in Gunung Halimun National Park and its adjacent area.Gobiidae was dominant, comprising 13 species or 36,36 %, followed by Cyprinidae comprising 5 species or 16.13 %.These Gobioid species were derived from Cisukawayana and Cimaja River, two of the rivers existing in Gunung Halimun National Park which flow south, to the Indian Ocean. In river flowing north i.e, Cikaniki, Ciberang and Cidurian, even from the middle of Cisadane River these fishes were not found. The fishes species which were found in common in rivers flowing north and south were Rasbora aprotaenia,Puntius binotatus, Channa gachua, Clarias batrachus, Poecilia reticulata and Xiphoporus helleri. Up to the present ten fish species were found within the park such as R. aprotaernia, P. binotatus, T. tambra, C. gachua, P. reticulata, P. latipinna, Cyprinus carpio, Monopterus albus, Glyptothorax platypogon and Lentipes sp. It was found that genus Lentipes and Schismatogobius marmoratus extend their range to Java (new record for Java) as well as Rasbora aprotaenia extends its range to southern Java
Fish Fauna of Gunung Halimun National Park Region: Additional Information on the Utilization*[fauna Ikan Taman Nasional Gunung Halimun: Informasi Tambahan Tentang Pemanfaatannya]
No full textGunung Halimun National Park is known to be the area of headwaters of a number of rivers/streams originate. However,there is no information about the fishes living in these rivers systems. In this regard, a series of ichthyofauna study was conducted from 1996 to 2002 in Cikaniki, Cimaja/Cisarua, Cisukawayana, Ciberang, Cidurian and Cibareno that covered 94 sampling stations. Method that was used was Catch Per Unit of effort (CPU) where electric fishing gear (and) cast net, trap were used.Forty fish species belonging to 16 families and 26 genera have been found. Gobiidae, the diadromous fishes, was dominant, comprising 14 species or 35 %, followed by Cyprinidae comprising 5 species or 12.5 %.These Gobioid fishes were derived from Cisukawayana, Cimaja, and Cibareno River, where these rivers flow south to the Indian Ocean. It was found that Paray, Rasbora aprotaenia; Beunteur, Puntius binotatus; Bogo, Channa gachua; Lele, Clarias batrachus; Kehkel, Glyptothorax platypogon; Soro, Tor tambra; Bungkreng/ Ikan Seribu Poecilia reticulata and Paris, Xiphoporus helleri were found in common in rivers flowing north and south, and Lentipes as well as Schismatogobius marmoratus extend their range to Java (new record for Java). The utilization of fishes for food by local people is presented including Gobioid fishes, which are at the juvenile stage (called as impun) are utilized as a part of their food source
Habitat dan Makanan Ikan Botia ,Botia Macracanthus Bleeker di Sungai Batanghari , Jambi
No full textSuatu penelitian telah dilaksanakan pada bulan September dan Oktober 1991 di Sungai Batanghari dan selama penelitian telah tertangkap sebanyak 101 ekor ikan botia dengan kisaran panjang dan berat ikan adalah 56 - 305 mm dan 3,85 - 529,12 gram. Ikan yang tertangkap ini dikelompokkan ke dalam 6 kelompok ukuran panjang: Ikan berukuran besar lebih banyak ditemukan di daerah hulu, sedangkan yang kecil menyebar merata di sepanjang sungai. Terdapat persaingan yang kuat antar kelompok ikan yang berukuran kecil dalam memperebutkan habitat. Makanan ikan botia meliputi Crustacea, Insekta, Nematoda, Moluska dan Algae. Persaingan dalam hal makanan terlihat besar antara kelompok ukuran kecil dengan kelompok ukuran sedang.Kata·kata kunci : botia, luas relung, tumpang tindih relung, habitat, makana
Pengaruh Alkalinitas Terhadap Kelangsungan Hidup Dan Pertumbuhan Ikan Lalawak Barbodes SP. [Effect of Alkalinity on the Survival Rate and Growth of Lalawak Fish, Barb Odes SP.]
No full textThis experiment was conducted to determine the effect of alkalinity on the survival rate and daily growth rate of Barbodes sp. The fishes were reared in 12 aquariums with four different alkalinity levels 48, 78, 108 and 138 ppm. Each aquarium filled with 10 fish at the average weight of 12.25 to 12.64 g attempt. The treatment lasted for 75 days. During the experiment, the fish were given commercial diet (pellet) with the dose of 5% of biomass weight at the frequency of three times a day. Result of the experiment showed that the survival rate for all treatments was 100%, while the alkalinity which suitable for daily growth rate of the fish was 80 ppm C'aCO
KEMATANGAN GONAD DAN KEBIASAAN MAKANAN IKAN JANJAN BERSISIK (Parapocryptes sp) DI PERAIRAN UJUNG PANGKAH, JAWA TIMUR
No full textIkan janjan bersisik (Parapocryptes sp) cukup banyak ditemukan di wilayah estuari atau daerah pertambakan.Penelitian mengenai kematangan gonad dan kebiasaan makanan ikan janjan bersisik dilakukan sejak Februari sampai Juni 2002. Pengambilan contoh dilakukan tiap bulan dengan menggunakan beberapa peralatan yaitu jaring insang (ukuran mata jaring 2.5 cm dan 4.5 cm), trammel net, sero dan bubu. Penelitian bertujuan untuk mengetahui tingkat kematangan gonad dan kebiasaan makanan ikan janjan bersisik. Pengamatan dilakukan terhadap tingkat kematangan gonad (TKG), diameter telur dan jenis makanan. Sedangkan analisis dilakukan untuk mengetahui indeks kematangan gonad (IKG), indeks kepenuhan lambung (IKL), indeks bagian terbesar (IP) dan kesamaan jenis makanan (IS) antara ikan jantan dan betina. Tingkat kematangan gonad ikan contoh (n = 72 ikan jantan, n = 57 ikan betina) bervariasi tergantung bulan pengamatan. Indeks kematangan gonad berkisar antara 0.05-0.25% untuk ikan jantan dan 0.40-1.64% untuk ikan betina, dengan nilai yang cukup tinggi pada bulan Juni. Diameter telur berkisar antara 0.020-0.479 mm, dengan lebih dari satu puncak sebaran yang menunjukkan adanya pola pemijahan parsial. Tingkat kepenuhan lambung ikan bervariasi, dan memiliki nilai yang cukup tinggi pada bulan Maret dan Juni. Jenis makanan ikan baik jantan ataupun betina relatif sama (IS = 77%), yang umumnya terdiri atas Bacillariophyceae, Chlorophyceae, Cyanophyceae dan Detritus.Kata kunci: ikan janjan bersisik (Parapocryptes sp.), kematangan gonad, kebiasaan makan
Aspek Pemijahan Ikan Motan, Thynnichthys Thynnoides, Bl1eker1852 (Familicyprinidae) Di Rawa Banjiran Sungai Kampar Kiri, Riau [Spawning Aspects of Thynnichthys Thynnoides Bleeker 1852 (Family Cyprinidae) in the Floodplain of Kampar Kiri River, Riau]
No full textStudy on the spawning aspects of Thynnichthys thynnoides in the floodplain of Kampar Kiri River was conducted from June 2006 to December 2006, using experimental gillnet and trap. Total samples were 852 individuals, comprised 479 individuals from Mentulik (294 males and 185 females) and 373 individuals from Simalinyang (197 males and 176 females). The range of total length was between 94-198 mm for fishes caught from Mentulik and 104-227 mm from Simalinyang. Sex ratio was counted for fishes in QSIIV. Sex ratio is balanced for fish in Mentulik and unbalanced for fish in Simalinyang. The first size of maturity for male in Mentulik and in Simalinyang were 105 and 118 mm; while for female ones were 109 and 108 mm. Presumably, the spawning season is on September-December with the peak spawning in October. Fecundity ranged 781-27135 eggs for fish from Mentulik and 797-35804 eggs from Simalinyang. The Fish is indieaied to be a total spawner
