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![Approximate location of the Baruna Jaya VIII anchor points during Ex Anambas from Day 01 to Day 10 of cruise trek. [P. = Pulau = Island; T. = Teluk = Bay]. Day 01 = P. Batam, 11 Mar 2002; Day 02 = T. Tiru, P. Jemaja, 12-Mar 2002; Day 03 = P. Jemaja: T. Jebung, 13-Mar 2002; Day 04 = P. Siantan, north: T. Tarempah, 14-Mar 2002; Day 05 = P. Mubur, south: T. Ayer Bandong, 15Mar 2002; Day 06 = P. Laut, south coast, 16 March 2002; Day 07 = P. Panjang, 17-Mar 2002; Day 08 = P. Bunguran, west coast, 18 Mar 2002; Day 09 = P. Bajau, 19 Mar 2002; Day 10 = P. Batam. See also http://rmbr.nus.edu.sg/exanambas](profile/Sivasothi-N/publication/311971468/figure/fig1/AS:669958593839107@1536741984170/Approximate-location-of-the-Baruna-Jaya-VIII-anchor-points-during-Ex-Anambas-from-Day-01.png)
Approximate location of the Baruna Jaya VIII anchor points during Ex Anambas from Day 01 to Day 10 of cruise trek. [P. = Pulau = Island; T. = Teluk = Bay]. Day 01 = P. Batam, 11 Mar 2002; Day 02 = T. Tiru, P. Jemaja, 12-Mar 2002; Day 03 = P. Jemaja: T. Jebung, 13-Mar 2002; Day 04 = P. Siantan, north: T. Tarempah, 14-Mar 2002; Day 05 = P. Mubur, south: T. Ayer Bandong, 15Mar 2002; Day 06 = P. Laut, south coast, 16 March 2002; Day 07 = P. Panjang, 17-Mar 2002; Day 08 = P. Bunguran, west coast, 18 Mar 2002; Day 09 = P. Bajau, 19 Mar 2002; Day 10 = P. Batam. See also http://rmbr.nus.edu.sg/exanambas
Source publication
In March 2002, scientists from the South China Sea region conducted a major biodiversity expedition to the waters off the Anambas and Natuna Islands in Indonesia. The two week expedition obtained over 3000 specimens representing a large diversity of plant and animal species. Many were new records for the area, and some were also new to science. The...
Contexts in source publication
Context 1
... Anambas was conducted in the waters of the Anambas and the Natuna Islands group (Fig. 1). The two sets of islands consist of about 70 small islands spread in an area of about 120 miles east-west by 70 miles north-south. Some of the islands are hilly or mountainous, with major human populations established in two small towns named Tarempa in Jemeja Island, Anambas and Ranai in Natuna Besar Island, ...
Citations
... 2002, an expedition of scientists from the South China Sea region conducted studies to assess the marine biodiversity of the Anambas and Natuna Islands (Ng et al. 2004a). Their expedition collected around 300 kg of biological specimens from sixty sites, documented twenty seven new species records for the South China Sea, and resulted in the discovery of five new species. ...
The coral reefs surrounding Pulau Durai (located in the northwest of Indonesia in the Anambas Islands, South China Sea) were surveyed from 22 June to 5 July 2011 to provide baseline data on their biotic composition and condition. At each of four sites around the island, point intercept methodology over two 50 m transects yielded an average benthic cover of 26% live hard coral. The maximum live hard coral cover observed was 47% on the northern side of the island where fishing boats anchor overnight to seek shelter from the southwest monsoon. The minimum of 3% live hard coral was observed on the west side, which is the inhabited area of the island and where there is the greatest amount of anthropogenic activity. A total of 38 hard coral genera and 115 fish species were recorded across all transects. The average biomass of fish per transect was 2135.5 kg/ha and the populations were mostly comprised of herbivores which correlated with the abundance of dead coral, algae overgrowth, and lack of predator fish. Crown-of-thorns starfish (Acanthaster planci) were present at all sites with a maximum of 15 individuals sighted on both the North Shallow and South Shallow transects. In general, damage from anchors and destructive fishing practices have gravely impacted Pulau Durai's reefs in the past. Present threats include continued anchoring, over-fishing and a current infestation of crown-of-thorns starfish, which are negatively affecting the remaining health and abundance of living coral. Pulau Durai and its neighbouring island, Pulau Pahat, were declared a marine protected area in July 2011. Given the depleted state of this reef, it will be imperative to establish a "no-take" fishing area to restore the fish populations, ban anchoring on the reef to stop the destruction of coral, and if possible, remove the crown-of-thorns starfish.
We report on the freshwater crabs of the families Potamidae, Gecarcinucidae, and Sesarmidae in the archipelago of Anambas and Natuna Islands in Indonesia. Five genera (one new) and eight species (four new) are now recorded from the islands. For the Potamidae, a new genus and a new species, Natunamon indonesicumn. sp., is described from Natuna; the taxon has diagnostic characters intermediate between IsolapotamonBott, 1968 and IbanumNg, 1995 from Borneo. A new species of Isolapotamon, I. remotumn. sp., is also described from Anambas; this is the first record of the genus outside Borneo and Mindanao, Philippines. For the Gecarcinucidae, the rare Balssiathelphusa natunaensisBott, 1970 is collected for the first time since its description, although the type was collected over 120 years ago; the species is redescribed in detail and the composition of the genus discussed. The widely distributed gecarcinucid, Parathelphusa maculataDe Man, 1879 is also recorded from Anambas and Natuna. Four species of Sesarmidae are reported: Geosesarma insulare Ng, 1986 (from Anambas), G. teschi Ng, 1986 (from Natuna), G. anambasn. sp. (from Anambas) and G. hashimin. sp. (from Natuna). Geosesarma hashimin. sp. is an arboreal species with a suite of atypical characters that suggest its present classification in Geosesarma needs to be reassessed.
A new species of the portunid genus, Monomia Gistel, 1848, is described from the South China Sea in Vietnam. Monomia lucida sp. nov. is morphologically most similar to M. argentata (A. Milne-Edwards, 1861), which was originally described from Sarawak, on the island of Borneo. In addition to the stout, forward-directed anterolateral teeth of the carapace, the subrectangular sixth segment of the male pleon, and the long and slender laterally bent first gonopods, adults of the new species reach a greater size, and can also be distinguished from M. argentata by the colour pattern on the natatory dactylus. The independent specific status of M. lucida sp. nov. is also supported by molecular evidence. Aside from a comparison of this new species with other known congeners, new photographs of the holotype of M. samoensis (Ward, 1939) are also provided.
In his catalogue of British Museum Crustacea, Adam White listed two swimming crabs from Borneo as a new species, Amphitrite argentata, but he did not provide a description and therefore the name was a nomen nudum. Later, Alphonse Milne-Edwards described the larger of these male specimens as Neptunus argentatus and credited the species to White. Now assigned to Monomia Gistel, 1848, M. argentata was recently considered to represent a species-complex; however, its nomenclature and taxonomy have been confused over a long period of time. Furthermore, the larger syntype examined by Alphonse Milne-Edwards is no longer extant. The present study compared the smaller extant M. argentata male of White, here designated as the lectotype, with the description by A. Milne-Edwards. This dried specimen was re-examined using X-ray and computed tomography scanning techniques in order to reveal the general morphology of the first male gonopod (G1). Fresh material was collected and identified with confidence as M. argentata. This species was redescribed to modern standards including illustrations, details of coloration and new scanning electron micrographs of the G1 were provided. The validity of this species was further endorsed by comparing DNA sequences with congeners from the South China Sea. To conclude, the type status, authority and associated species-complex of M. argentata are discussed.
A total of 22 species (16 identified) of 14 genera in 6 families of aquatic Heteroptera were recorded from the Anambas and Natuna islands. All species are first records from the studied islands, except Ranatra cf. natunaensis which can not be confirmed.
