• Publicationsclose
• 2013-2022close
• Article close
• FR close
• Indonesian close

International audience; Hatchery managers and maintaining genetic diversity and fitness population in endangered and threatened species in pond is a important and difficult thing to do. But is must to do for conservation biology. Fitness and structure population depends on effective breeding number (Ne) and population connectivity between each other. The second most important thing is gene flow and genetic drift. Ne is major role in the maintenance of genetic diversity as indicator for inbreeding depresion and genetic drift. We sampled 6 hatchery in Jakarta and Bekasi Indonesia region and used 12 polymorphic microsatellite loci to quantify population genetic structure. Result in this study are, each farm have different methode. The old farmers is bapakGusi and bapakHasan (+30 years). Ne in bapakHasan and bapakGusi hatcheryis 66,667 and F value is 0,00749 and loosing allele (P) is 0,26183. Compared with younger farmers bapakYahya (5 years) have Ne = 133,333, F = 0,00375 and P = 0,06855. Even though hatchery bapakHasan and bapakGusi have the same value Ne, F and P but the result in population structure they are different founder populations. Hatchery bapakHasan have unique structure and alleles composition compared with other hatchery.; Manajemen hatchery penting untuk mempertahankan keragaman genetik dan kebugaran populasi dari spesies langka dan terancam punah di pembudidaya dan hal ini sulit dilakukan, tetapi menjadi keharusan untuk biologi konservasi. Kebugaran dan struktur populasi tergantung pada efektif breeding number (Ne) dan konektivitas populasi antara satu sama lain serta aliran gen dan pergeseran genetik. Ne memiliki peran utama dalam pemeliharaan keanekaragaman genetik dan sebagai indikator terjadinya inbreeding dan pergeseran genetik. Terdapat 6 hatchery sampel di wilayah Jakarta dan Bekasi Indonesia dengan menggunakan 12 lokus mikrosatelit polimorfik untuk mengukur struktur genetik populasi. Hasil penelitian ini menunjukkan bahwa masing-masing hatchery memiliki metode yang berbeda. Pembudidaya paling lama adalah bapak Gusi dan bapak Hasan (30 tahun). Ne di hatchery bapak Hasan dan bapak Gusi adalah 66.667 dan nilai F adalah 0,00749 dan nilai kehilangan alel (P) adalah 0,26183. Dibandingkan dengan pembudidaya bapak Yahya (5 tahun) memiliki Ne = 133.333, F = 0,00375 dan P = 0,06855. Meskipun penetasan di hatchery bapak Hasan dan bapak Gusi memiliki nilai Ne, F dan P yang sama, tetapi hasil struktur populasinya adalah populasi pendiri yang berbeda. Hatcheri bapak Hasan memiliki struktur yang unik dan komposisi alel dibandingkan dengan pembenihan lainnya.

National audience

Number: 1; International audience; Distribution and abundance of Pyrodinium bahamense cyst in the harmful algal blooms risk waters in Indonesia. Pyrodinium bahamenseas Harmful Algal Blooms (HABs) is one of the rising environmental problems in the coastal areas of Southeast Asia, particularly in Indonesia. Cyst bank formed after the blooms of P. bahamense is a potential source for the future blooming events. Therefore, an effort to describe the distribution and abundance of P. bahamense cyst banks in Indonesian coastal waters is necessary as a part of the mitigation strategy against the negative impacts of those toxic dinoflagellate blooms. This study was done as a desk study, which included a literature study, reanalysed of previous research data, and reanalysed of preserved samples or stored raw samples. Data and samples used in this study were collected and analysed from part of past researches in Lampung Bay, Jakarta Bay, Cirebon coastal waters, and Ambon Bay. This study also included an analysis to determine the P. Bahamense HABs risk level in the studied areas based on the cyst density and distribution data. Results showed a low density of P. bahamense cyst in Lampung Bay and Jakarta Bay, with cyst density \textless50 cysts.g-1 wet sediment. In contrast, the bottom sediments of Ambon Bay and Cirebon coastal waters contained high cyst density, which reached \textgreater1,000 cysts.g-1 wet sediment. Based on those data, the P. Bahamense HABs risk in Jakarta Bay and Lampung Bay would be generally much lower compared to Ambon Bay and Cirebon waters. The existence of cyst banks in those coastal waters may indicate a possibility of future blooms of P. bahamense.

Proporsi imigran dari satu negara ke negara lain sangat bervariasi. Di beberapa negara imigran melebihi setengah populasi, sementara di beberapa negara lain di bawah 0,1%. Negara mana yang memiliki imigran paling banyak? Dari mana imigran-imigran berasal? Bagaimana persebaran imigran di seluruh dunia? Di sini kami memberikan ikhtisar jumlah dan proporsi imigran di berbagai negara di seluruh dunia.

International audience

International audience; This article presents an architectural and epigraphical study of several objects recovered from the Central Javanese temple site of Gunung Sari. The site has yielded unique cylindrical stone objects, some of which bear short inscriptions in Old Javanese language indicating the directions of space. Based on architectural arguments, we conclude that the temple was a Śaiva monument. The cylindrical objects were most likely placed originally in the floor of the platform of the temple, where they covered foundation deposits placed during the construction of the temple in connection with the ritual preparation of the ground plan. Although objects exactly identical in shape have thus far not been discovered in Java, objects that had different shapes but similar ritual functions can be identified at other more or less contemporary sites in the region. Some of these bear inscriptions. The inscriptions of Candi Gunung Sari are, however, unique in that they offer by far the oldest (nearly) complete system of eight directions of space expressed in Javanese terms; Artikel ini menyajikan studi arsitektur dan epigrafi dari beberapa artefak yang ditemukan di Candi Gunung Sari, Jawa Tengah. Pada situs tersebut ditemukan batu berbentuk tabung yang tidak ditemukan di tempat lain, beberapa di antaranya mengandung prasasti pendek berbahasa Jawa Kuno yang berisi penunjuk arah mata angin. Berdasarkan alasan arsitektural, kami menarik kesimpulan bahwa candi itu adalah bangunan berlatar belakang Sivaisme. Konon, batu-batu tabung itu rupanya diletakkan di dalam alas candi dan menutupi peripih-peripih yang dibuat selama candi dibangun, berkaitan dengan persiapan ritual tata letak candi. Meskipun benda yang persis sama belum pernah ditemukan di Jawa selama ini, artefak berbentuk lain dengan fungsi ritual yang sama dapat dikenali di beberapa situs yang kurang lebih semasa di daerah yang sama. Beberapa di antaranya juga mengandung prasasti. Prasasti-prasasti di Candi Gunung Sari memiliki keunikan karena menyebutkan sistem (hampir) lengkap yang paling tua dari delapan mata angin yang diungkapkan dalam istilah Jawa asli.