Articles

Found 6 Documents
Search

ADDITIONAL DESCRIPTIVE DATA FOR THE NEW COELACANTH, Latimeria menadoensis Pouyaud et al. FROM SULAWESI, INDONESIA Wirjoatmodjo, Soetikno; Tjakrawidjaja, Agus H.
TREUBIA Vol 32, No 1 (2002): Vol. 32 No. 1, August 2002
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3622.528 KB) | DOI: 10.14203/treubia.v32i1.593

Abstract

Morphometries and meristies data of Latimeria menadoensis, a new species of Coelacanth from Sulawesi, Indonesia (Pouyaud et al. 1999) are reported. Comparison with data of L. chalumnae as reported by McAllister and Smith (1978) and Forey (1998) are presented. Among the 22 descriptive characters only 41% are different. Some more specimens of L. menadoensis are still needed for more detail study of its morphological differences with L. chalumnae.Keywords: L. menadoensis, description, L. chalumnae, morphometries andmeristies comparison.
Keanekaragaman Fauna Ikan di Kawasan DAS Hulu Tabalong, ~abupatenT abalong, Kalimantan Selatan Tjakrawidjaja, Agus H.
JURNAL BIOLOGI INDONESIA Vol 3, No 4 (2002): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (275.746 KB) | DOI: 10.14203/jbi.v3i4.3324

Abstract

ABSTRACTFish Fauna Diversity of upper Tabalong basin area, Tabalong District, SouthKalimantan. A survey was done to examine the freshwater fish fauna of the upper Tabalongarea, with emphasis on the PT. AYI production forest area, Tabalong District, SouthKalimantan Province. Field work done 13 - 28 June 2001. Fish were sampled at 26 sites inupper Tabalong, within the Tabalong Kiwa catchment above Panaan, on the Lou tributary ofthe Kumap River, and on the Ayu tributary of the Tabalong Kanan river. Sampling was doneusing a variety of methods including siene net, cast net, and gill net, hook and line, rotenoneand electrical shock 120 volt. A total of 93 fish species were recorded, in 34 genera and 11families. The fish fauna of upper Tabalong is typical of that in rivers systems in Kalimantan,in that is dominated by Cyprinidae family 45 species (48.4%) in 18 genera, 28 species(30.1%) in five genera of which are in the Balitoridae, five species (5.4%) in two genera ofMastacembelidae, four Species (4.3%) in two genera of Bagridae, Sisoridae, Channidae andTetraodontidae each three Species (3.2%) in one genera, two (2.1%) in two genera ofCobitidae, and the end Clariidae, Synbranchidae and Osphronemidae each one species (1.1%)in one genera. Five species of fish are new record of distrbution to Borneo, one species maybe New species (in process).Keywords: Diversity, fish, species, abundance, Tabalong, Kalimantan Selatan
DIMORFISME SEKSUAL DAN NISBAH KELAMIN IKAN ARWANA {Scleropages spp.) [Sexual dimorphism and sex ratio and of asian arwana (Scleropages spp.)] Tjakrawidjaja, Agus H.
Jurnal Iktiologi Indonesia Vol 6, No 2 (2006): Desember 2006
Publisher : Masyarakat Iktiologi Indonesia (MII )

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (140.471 KB) | DOI: 10.32491/jii.v6i2.228

Abstract

Preliminary study of biological reproduction aspects of Asian Arwana (S. jardinii and S. formosus) particularly sexual-dimorphism and sex-ratio of gender is very important as a base for captivity breeding. Up to the present, it is difficult to identify the sex identity of these Asian Arwanas that lead the difficulties in making sex-ratio description. The relible sex-ratio in captive breeding would increase the production. The result of this research would be useful for reference in the identification of the gender of Asian Arwanas.
PERTUMBUHAN IKAN ARWANA IRIAN (Scleropages jardinii Saville-Kent) DI AKUARIUM [Growth of Bonytongue Fish {Scleropages jardinii Saville-Kent) in Aquarium] Tjakrawidjaja, Agus H.
Jurnal Iktiologi Indonesia Vol 6, No 1 (2006): Juni 2006
Publisher : Masyarakat Iktiologi Indonesia (MII )

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (148.4 KB) | DOI: 10.32491/jii.v6i1.234

Abstract

The aim of this research was to know growth in various life stages of Scleropagus jardinii Saville-Kent 1892 during domestication particularly the ranching system. Growth, food conversion, survival rate and water qualities were determined for each life stage. The result showed that each life stage is characterized by different growth. Highest food conversion was showed by adult followed by adolescent and juvenile have lowest amount of food conversion. Each life stage showed 100% for survival rate. Water quality in this experiment was adequate to support growth in fish.
FRESHWATER FISHES OF MANGGARAI FLORES, WITH THE VARIOUS LIMNOLOGY ASPECT (Jenis ikan air tawar dari Manggarai, Flores, dengan variasi aspek limnologinya) Tjakrawidjaja, Agus H.
Jurnal Iktiologi Indonesia Vol 2, No 2 (2002): Desember 2002
Publisher : Masyarakat Iktiologi Indonesia (MII )

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v2i2.273

Abstract

The diversity of freshwater fishes on Manggarai, Flores Island is very poor. The result of first time exploration in 1994, there were Seventeen species fishes collected of 8 families, including 4 new record species, 4 introduce species from 21 sample sites, 18 rivers and 3 lakes. On a one month expedition in 1994 . The dominan family of fishes is Gobiidae. Habitat types are very variation, the reverine site is consisted of 18 rivers and 3 lakes, habitat types are consisted of 7 types. The habitat 2 is the most habitat type found. The characteristic of this habitat type is: Bottom: sand with large stones and pebbles, water is very clear, rapid current, pH: 3.91 - 8.51, conductivity: 20 - 186 u S/cm, and temperature during day light was 19 - 25.7 ° celcius. surrounded by primary forest,. AbstrakKeanekaragaman ikan air tawar di Manggarai, Pulau Flores adalah miskin. Sebanyak 17 jenis ikan dalam 8 suku telah terkoleksi, ini merupakan hasil pertamakalinya dari eksplorasi di tahun 1994, termasuk 4 jenis baru dan 4 jenis pendatang, semuanya terkoleksi dari 21 stasiun pengembilan sampel di 18 sungai, dan 3 danau. Jenis - jenis ikan dari suku Gobiidae mendominasinya. Tipe - tipe habitat yang terdapat di lokasi pengambilan sampel di 21 stasiun, 18 sungai, dan 3 danau ini temyata sangat bervareasi, tipe habitat yang ada berjumlah 7 tipe. Tipe habitat yang paling umum didapat di kawasan ini adalah dengan karakter yang berupa dasar perairan berupa pasir dengan batuan berukuran besar dan batuan berupa kerikil, jemih, deras, keasaman 3,91 - 8,51, daya hantar listrik (DHL) 20- 186 u S/cm, suhu disiang hari 19,0 - 25,7 °C dan di kelilingi oleh hutan primer.
IKTIOFAUNA DI PERAIRAN SEKITAR GUNUNG KABELA TAMAN NASIONAL BOGANI NANI WARTABONE SULAWESI UTARA (Ichthyofauna of Bogani Nani Wartabone National Park Waters North Sulawesi) Haryono, nFN; Tjakrawidjaja, Agus H.; Riyanto, Awal
Jurnal Iktiologi Indonesia Vol 2, No 2 (2002): Desember 2002
Publisher : Masyarakat Iktiologi Indonesia (MII )

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v2i2.275

Abstract

The study of fish biodiversity of Bogani Nani Wartabone National Park North Sulawesi was conducted In May 2002, and location is Kabela Mount areas. The aims of study are to know fishes diversity, abundance, local distribution, potency and related aspects. The results were recorded 25 species belonging to 21 genus and 14 families, Gobiidae is dominant family with 9 species. The range of abundance is 1 - 33.75 ind./St.; Barbodes gonionotus is most abundant (33,75 ind./St.) and Sicyopterus longifilis is widest distributed, ecological factor and related aspects will be discussion. AbstrakPenelitian mengenai ikan di perairan kawasan Taman Nasional Bogani Nani Wartabone telah dilakukan dengan mengambil lokasi di sekitar Gunung Kabela. Penelitian bertujuan untuk mengetahui keanekaragaman jenis ikan, kelimpahan, distribusi, potensi dan aspek terkait lainnya. Hasil penelitian tercatat 25 jenis dari 21 marga dan 14 suku. Gobiidae merupakan suku yang paling dominan dengan 9 jenis. Kelimpahan jenis bervariasi antara 1 sampai 33,75 ind./st.; Barbodes gonionotus merupakan jenis yang paling melimpah (33,75 ind/st), dan Sicyopterus longifilis merupakan jenis yang tersebar paling luas, faktor ekologi dan aspek terkait lainnya akan dibahas dalam makalah.