We reveal the molecular and virological characteristics of DENV in Purwokerto, Banyumas regency, Central Java. The genotype and phylogenetic analyses indicate the endemicity of the circulating DENV in the city. Our serotype and genotype data provide references for future dengue molecular epidemiology studies and disease management in the region.
Suryaningsih S, Sukmaningrum S, Simanjuntak SBI, Kusbiyanto. 2018. Diversity and longitudinal distribution of freshwater fish in Klawing River, Central Java, Indonesia. Biodiversitas 19: 85-92. The aims of this study were to evaluate the diversity and longitudinal distribution of fish in Klawing River, Purbalingga (Central Java). The survey was performed using a clustered randomsampling technique. The river was divided into upstream, midstream and downstream regions. Species diversity was measured as the number of species, and the longitudinal distribution was assessed by determining the fish species present in each of the three regions. Eighteen fish species of eleven families were identified in the Klawing River: Cyprinidae, Bagridae, Mastacembelidae, Anabantidae, Cichlidae, Channidae, Eleotrididae, Beleontinidae, Osphronemidae, Poecilidae, and Siluridae. Cyprinidae exhibited the highest number of species (six), followed by Bagridae and Cichlidae (two species each). The other families were represented by one species each. A single cluster analysis showed that the upstream population had a similarity of 78% and 50% with the midstream and downstream populations, respectively. Species and family diversities were higher in the midstream populations than in the upstream and downstream populations. This longitudinal distribution may be due to differences in environmental conditions and suggests that management of the land surrounding the Klawing River is a key factor in the conservation of freshwater fish.
Semua jenis ikan pada awalnya hidup secara alami tetapi beberapa jenis sudah dapat dibudidayakan dan ada yang masih hidup liar. Tujuan penelitian ini adalah upaya domestikasi ikan mata merah/Brek (Puntius orphoides Valencienes, 1842). Ikan mata merah dicuplik dari Sungai Klawing dan Waduk Sempor pada bulan Maret 2008 untuk dikaji aspek habitatnya dan dianalisis nutrisinya. Analisis nutrisi dikerjakan di Laboratorium Nutrisi Ternak, Fakultas Peternakan UNSOED dan LPPT UGM. Jenis ikan sebagai pembanding adalah Puntius javanicus Blkr. dan Oreochromis niloticus. Hasil analisis laboratorium mengenai kadar air, protein dan lemak P. orphoides lebih menguntungkan dibandingkan dengan dua jenis yang lain. Kelebihan jenis ikan mata merah adalah khususnya kandungan protein, maka dapat terus dikembangkan sebagai cadangan protein sektor perikanan yang sangat baik.
The fish auction site at Ocean Fishing Port of Cilacap is one of the major fish landings sites in Indonesia. Fishes landed in this port mainly of large pelagic fish, bycatch, crustaceans including kemprit fish (Ilisha megaloptera Swainson,1839). Kemprit fish is a member of the family Pristigasteridae, which has an elongated body shape-sprawl. Fishers use this fish as the main ingredient to produce fish crackers and dried salted fish. Overfishing is the greatest threat to kemprit fish, and without conservation efforts the future population is uncertain. Fish farming is one right answer in kemprit fish conservation. However, information on this fish biology is insufficient. One of the biological aspects is sexual dimorphism, the morphological properties that can be used to distinguish between male and female fish. Truss morphometrics can measure the morphological traits differences of male and female. This technique in which the measurement of the distance Truss morphometrics in certain parts, by the benchmark points (dots Truss morphometrics), then compared with standard size. The result of the preliminary survey indicated that kemprit fish did not show sexual dimorphism, therefore truss morphometric technique applies to distinguish sexes of this fish. This research was a survey, and purposive sampling techniques were used to collect data. Data were then analyzed using the “t” test. The results showed that distinct truss distance between male and female fish was the distance between the anterior base of the dorsal fin to the anterior base of the ventral fins and the distance between the posterior base of the dorsal fin to the anterior base of the anal fin.
Ikan Belanak memiliki keunikan pada bibir bagian atas lebih tebal daripada bagian bawah, namun antara ikan jantan dan betina masih sulit dibedakan secara morfologinya. Ikan belanak tidak menunjukkan adanya dimorfisme seksual secara jelas, sehingga identifikasi jenis kelamin perlu dilakukan penelitian dengan teknik morfometrik yang telah banyak dibuktikan mampu mengidentifikasi perbedaan jantan dan betina pada populasi ikan. Berdasarkan uraian di atas dapat dirumuskan permasalahan yang akan dikaji dalam penelitian ini yaitu: (1) Dapatkah karakter morfologi digunakan sebagai dasar pembeda jenis kelamin ikan belanak (Mugil cephalus dan Valamugil seheli). (2) Karakter morfologi manakah yang dapat digunakan untuk membedakan ikan jantan dan betina. Berdasarkan permasalahan tersebut, maka tujuan penelitian ini adalah untuk: (1) Mengetahui perbedaan jenis kelamin ikan belanak (Mugil cephalus dan Valamugil seheli) berdasarkan performa, truss morfometrics, morfometrik standard dan meristik. (2) Mengetahui karakter morfologi yang dapat digunakan untuk membedakan jenis kelamin ikan belanak (Mugil cephalus dan Valamugil seheli) jantan dan betina. Metode yang digunakan dalam penelitian ini adalah metode survei, dan sampel diambil dengan teknik purposive random sampling yaitu sampel dipilih secara khusus sesuai dengan tujuan penelitian. Variabel yang diamati yaitu peforma morfologi, morfometrik standar, meristik dan truss morphometrics. Data hasil pengamatan performa morfologi dan meristik dianalisis secara deskriptif. Data pengukuran morfometrik dan truss morphometrics dianalisis dengan menggunakan uji ‘t’. Hasil penelitian menunjukan bahwa ikan belanak yang di perdagangkan di TPI Tegal Kamulyan Cilacap Jawa Tengah terdapat dua spesies yakni, Mugil cephalus dan Valamugil seheli. Karakter morfologi dapat mengidentifikasi jenis kelamin ikan belanak (Mugil cephalus dan Valamugil seheli).
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