Pemetaan Distribusi dan Kelimpahan Ikan di Perairan Kalimantan Selatan Menggunakan Teknologi Akustik

Perairan Kalimantan Selatan merupakan wilayah strategis yang berbatasan dengan perairan laut dalam, Selat Makassar dan laut Banda. Penelitian akustik perikanan dilakukan dengan menggunakan echosounder EK500 berfrekuensi 38 kHz pada bulan Nopember 2010. Hasil menunjukkan bahwa kelimpahan akustik perikanan yang direpresentasikan dengan nilai hambur rata-rata SA tertinggi berada di sebelah selatan Pulau Matasiri, dan menurun menuju perairan pesisir Kalimantan Selatan. Tingginya kelimpahan ikan di sebelah selatan Pulau Matasiri ini diduga berkaitan dengan lokasinya yang berbatasan dengan laut terbuka, dimana merupakan batas (front) pertemuan massa air Selat Makassar, Laut Jawa, serta Sungai Barito; dimana aliran massa air yang membawa nutrien tinggi di'segarkan dengan massa air laut dalam. Dugaan panjang ikan di perairan Kalimantan Selatan berada pada kisaran 3,9 hingga 18,6 cm atau berada dalam rentang kuat pantul (target strength) -60,0 hingga -46,5 dB. Presentase kehadiran ikan-ikan berukuran besar (>-57,0 dB) terpantau berada di selatan Pulau Matasiri dan dekat muara Barito, sedangkan ikan berukuran kecil (<-57,0 dB) berada di utara dan barat Pulau Matasiri. Diperoleh juga kesesuaian kelimpahan ikan dengan periodisasi pasang-surut

Observation of Coastal Front and Circulation in the Northeastern Java Sea, Indonesia

The structure and spatial extent of a coastal front and circulation in the shallow (<55 m depth) northeastern Java Sea in Indonesia was investigated with a new dataset of high-resolution conductivity-temperature-depth (CTD) and along-track shipboard acoustic Doppler current profiler (SADCP) during a DIKTI-LIPI 2010 joint research cruise on R.V. Baruna Jaya 8. The coastal front separates fresh warm coastal water derived mainly from Barito River discharge and the saline, cool Java Sea water. The surface fresh water plume extends approximately 760 km from the Barito River estuary to the south, and its thickness varies from the surface to 10 m and 20 m depth, depending on its proximity to the fresh water source. The front is aligned a northeast and east direction, probably related to a meandering of strong northeastward monsoon current in the eastern part of the Java Sea during the observation time

Size-related differences in the thermoregulatory habits of free-ranging komodo dragons

Thermoregulatory processes were compared among three-size groups of free-ranging Komodo dragons (Varanus komodoensis) comprising small (5-20kg), medium (20-40gm) and large (40-70kg) lizards. While all size groups maintained a similar preferred body temperature of ≈ 35 °C, they achieved this end point differently. Small dragons appeared to engage in sun shuttling behavior more vigorously than large dragons as represented by their greater frequency of daily ambient temperature and light intensity changes as well as a greater activity and overall exposure to the sun. Large dragons were more sedentary and sun shuttled less. Further, they appear to rely to a greater extent on microhabitat selection and employed mouth gaping evaporative cooling to maintain their preferred operational temperature and prevent overheating. A potential ecological consequence of size-specific thermoregulatory habits for dragons is separation of foraging areas. In part, differences in thermoregulation could contribute to inducing shifts in predatory strategies from active foraging in small dragons to more sedentary sit-and-wait ambush predators in adults

CTD Sunda Strait in July 2001

CTD Casts were acquired using Research Vessel Baruna Jaya VIII in July, 2001THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Archived CTD profiles from World Ocean Datasets (WOD) of CTD with vertical resolution greater than 1 m

Selected World Ocean Datasets of the CTD profiles with vertical resolution greater than 1 meter.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Archived CTD profiles from World Ocean Datasets (WOD) of CTD with vertical resolution greater than 1 m

Selected World Ocean Datasets of the CTD profiles with vertical resolution greater than 1 meter.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV

Conservation of komodo dragons varanus komodoensis in the Wae Wuul nature reserve, Flores, Indonesia: a multidisciplinary approach

Multidisciplinary conservation initiatives are increasingly advocated as best practice for recovering endangered species. The Komodo dragon Varanus komodoensis is the world\u27s largest lizard, of prominent conservation value as an umbrella species for protection of south-east Indonesian ecosystems. Komodo dragons have faced multiple human-related threat processes in the past 30 years and are listed on Appendix I of the Convention on International Trade in Endangered Species of Wild Fauna and Flora, and considered Vulnerable according to the International Union for Conservation of Nature Red List. We report on a protection programme conducted from 2005 to 2012 in the Wae Wuul nature reserve, on the island of Flores, Indonesia. The Wae Wuul ranger post was completely rebuilt, and community awareness and involvement of local people in habitat-protection schemes were regularly and successfully implemented. Local rangers were trained in wildlife-monitoring techniques. Monitoring results indicated that Komodo dragon densities were lower in Wae Wuul than in the adjacent Komodo National Park; however, a relatively high level of genetic diversity was recorded for this population. Ungulate prey showed a relatively stable prey population density. Community-based initiatives and regular wildlife monitoring are crucial to ensure the persistence of Komodo dragons on Flores. The Wae Wuul protection programme is providing several sustainability indicators by which informed management plans can be designed for long-term conservation of Komodo dragons