CATATAN BARU DAN KEANEKARAGAMAN KOPEPODA DI PERAIRAN PANTAI DAN MANGROVE PULAU PANAITAN, TAMAN NASIONAL UJUNG KULON, BANTEN

Observasi tentang keragaman, kelimpahan, dan sebaran kopepoda di perairan pantai dan mangrove di Pulau Panaitan dilakukan pada bulan November 2008 (musim hujan). Sampel kopepoda diambil dengan jaring plankton secara horizontal dan vertikal pada siang dan malam hari, kemudian disimpan dan diidentifikasi di MZB LIPI. Penelitian ini bertujuan untuk mengukur keanekaragaman dan kelimpahan kopepoda di musim hujan yang mempunyai suhu dan salinitas tertentu. Ditemukan 72 jenis kopepoda dari 37 marga, 24 suku, dari enam bangsa termasuk dua catatan baru, yaitu Pontella forficula dan Pseudodiaptomus incisester. Keanekaragaman kopepoda di pantai dan mangrove tinggi sekitar 0,9473 dan 0,8345 (rentang 0-1). Akan tetapi, jika keduanya dibandingkan maka keanekaragaman kopepoda di pantai lebih tinggi dibandingkan di mangrove (3,584 vs. 2,431). Pontella denticauda dan Temora discaudata yang merupakan tipe neritik ditemukan mendominasi perairan pantai, sedangkan Corycaeus speciosus dan Oncaea conifera yang merupakan tipe neritik mendominasi perairan mangrove. Dominasi jenis oleh kopepoda neritik terjadi karena perairan Pulau Panaitan bersalinitas tinggi dan bersuhu rendah

Disentangling the taxonomy of the subfamily Rasborinae (Cypriniformes, Danionidae) in Sundaland using DNA barcodes

Sundaland constitutes one of the largest and most threatened biodiversity hotspots; however, our understanding of its biodiversity is afflicted by knowledge gaps in taxonomy and distribution patterns. The subfamily Rasborinae is the most diversified group of freshwater fishes in Sundaland. Uncertainties in their taxonomy and systematics have constrained its use as a model in evolutionary studies. Here, we established a DNA barcode reference library of the Rasborinae in Sundaland to examine species boundaries and range distributions through DNA-based species delimitation methods. A checklist of the Rasborinae of Sundaland was compiled based on online catalogs and used to estimate the taxonomic coverage of the present study. We generated a total of 991 DNA barcodes from 189 sampling sites in Sundaland. Together with 106 previously published sequences, we subsequently assembled a reference library of 1097 sequences that covers 65 taxa, including 61 of the 79 known Rasborinae species of Sundaland. Our library indicates that Rasborinae species are defined by distinct molecular lineages that are captured by species delimitation methods. A large overlap between intraspecific and interspecific genetic distance is observed that can be explained by the large amounts of cryptic diversity as evidenced by the 166 Operational Taxonomic Units detected. Implications for the evolutionary dynamics of species diversification are discussed

Exploring community assembly among Javanese and Balinese freshwater shrimps (Atyidae, Palaemonidae) through DNA barcodes

International audienc