Northern Papua New Research Articles

Electrophoretic and Morphological Analysis of the Systematics of the Phalanger-Orientalis (Marsupialia) Species Complex in Papua-New-Guinea and the Solomon-Islands

Three electrophoretically and morphologically distinct populations previously referred to Phalanger orientalis are recognised within Papua New Guinea and the Solomon Islands: Phalanger orientalis orientalis from northern Papua New Guinea and some nearby offshore islands, Phalanger orientalis breviceps from the Bismarck Archipelago and Solomon Islands, and Phalanger intercastellanus from eastern and southern Papua New Guinea and the islands of Milne Bay. P. o. orientalis is genetically and geographically relatively uniform. P. o. breviceps may have been introduced by humans over most of its range, and it is extremely variable, even within island populations. P. intercastellanus shows considerable intraspecific geographic variation, and is genetically divergent from P. o. orientalis (Nei's unbiased distance of 0.216) and P. o. breviceps (Nei's unbiased distance of 0.171). Indeed, this divergence is so marked that the previously recognised taxa Phalanger carmelitae and Phalanger vestitus are apparently genetically closer to P. orientalis than to P. intercastellanus.

Biology of Oxyeleotris heterodon and its major prey, Ophieleotris aporos, two floodplain sleepers (Pisces: Eleotrididae) of the Sepik River fishery, northern Papua New Guinea

Oxyeleotris heterodon attains 483 mm standard length (1.83 kg) and Ophieleotris aporos 245 mm (0.171 kg). Both species feature significantly in the local fishery in lowlands. Ophieleotris aporos is approximately one hundred times more abundant than Ox. heterodon in catches and landings which were influenced by river flood conditions in both species. Oxyeleotris heterodon is predominantly piscivorous but also eats Macrobrachium spp. prawns; fish prey consumed are almost exclusively Op. aporos. Ophieleotris aporos is omnivorous and feeds mainly on aquatic insects. Condition, fat deposition, feeding and reproduction in Op. aporos were related to the flood cycle with increases in the flood season; in Ox. heterodon variations in these factors related more to the availability of Op. aporos, seasonal changes being less marked. Ophieleotris aporos matures at a small size, has large gonads, small eggs and is highly fecund; Ox. heterodon exhibited opposite trends in these life-history characteristics by comparison. Reproductive styles adopted by the two species are interpreted in relation to the different predation pressures they experience. Oxyeleotris heterodon may not be adapted to high adult mortality and the fisheries implications of this are discussed.

The Performance of Antillean Wire Mesh Fish Traps Set on Coral Reefs in Northern Papua New Guinea

Sustained fishing with Antillean style S-shaped and arrowhead wire mesh fish traps was undertaken on and around coral reefs in northern Papua New Guinea. Catches by weight and numbers versus soak time conformed to asymptotic curves with maxima after five days immersion. Moonphase affected catch rates, with highest catches over the period of full moon. Over 30 different families of fish were taken by the traps, but in both trap designs, catches were dominated by surgeonfish (Acanthuridae). Other dominant components of the catch were groupers (Serranidae), emperors (Lethrinidae) and parrotfish (Scaridae).

Northern Papua New Guinea: Structure and Sedimentation in a Modern Arc-Continent Collision: ABSTRACT

Northern Papua New Guinea and the Solomon Sea are the site of a modern oblique, arc-continent collision, which is progressing from northwest to southeast. By combining offshore seismic data from the Solomon Sea with geologic mapping in the Markham Valley area of northern Papua New Guinea the authors are predicting the outcome of this collision. The Huon Gulf is the present site of initial collision. Seismic profiles show this area is dominated by thin thrust sheets. Onshore, the bulk of the uplifted accretionary wedge is a melange with exotic blocks of a variety of lithologies. Structurally below the melange lies the Leron Formation composed of thick channelized sandstone and conglomerate. It dips north at approximately 40{degree} and is cut by several thrust fault with associated folds. Limestone blocks within the melange are reported to be 2 Ma, and Beryllium 10 anomalies from Bismarck arc volcanoes suggest that initial collision of the Finisterre block (375 km northwest of the present collision point) began no earlier than 3 Ma. This implies the collision is propagating laterally at about 125 km/m.y.. Large outcrops of basalt and gabbro within the melange suggest that segments of oceanic crust were incorporated into the accretionary wedge. Modernmore » sedimentation within the collision zone grades from fluvial sediments in the Markham Valley to deep-water turbidites ponded behind a structural ridge near the point of incipient collision. The Markham submarine canyon occupies the collision front here, and efficiently erodes the accretionary wedge. This setting may serve as a modem analog for deposition of much of the Leron Formation which exhibits tremendous sediment reworking.« less

Some Aspects of the Reproductive Biology of Stolephorid Anchovies from Northern Papua New Guinea

Some Aspects of the Reproductive Biology of Stolephorid Anchovies from Northern Papua New Guinea

THE GENUS VALLERIOLA DISTANT (HEMIPTERA: LEPTOPODIDAE) IN AUSTRALIA, NEW CALEDONIA AND PAPUA NEW GUINEA WITH NOTES ON ZOOGEOGRAPHY1

AbstractValleriola Distant is the only leptopodid genus known from the tropical Pacific region. The species previously reported are V. wilsonae Drake from eastern Australia and V. assouanensis (Costa) from New Caledonia. The latter was misidentified, and is described herein as V. novacaledonica sp. n.; the revised range of V. assouanensis is from Egypt and Sudan through Iran and Afghanistan to India and Sri Lanka. V. tribulosa sp. n. from Cape York Peninsula and V. tuberculata sp. n. from northern Papua New Guinea are also described, the latter the first leptopodid recorded from New Guinea. Zoogeographical notes are given for all species of the genus known to us.

北部パプアニューギニアにおける伝統的カヌーの構造的特徴

北部パプアニューギニアにおける伝統的カヌーの構造的特徴

Geochemistry of cumulus peridotites and gabbros from the Marum ophiolite complex, northern Papua New Guinea

The layered cumulus rocks of the Marum ophiolite complex in northern Papua New Guinea range from highly magnesian dunite, wehrlite, and lherzolite through pyroxenite to norite-gabbro with minor anorthosite and ferronorite-gabbro near the top of the sequence. Most of the cumulates, particularly the gabbroic rocks, are characterised by recrystallised adcumulus textures and all intercumulus melt (mesostasis) has been expelled. Trends in the cumulate sequence from Mg-rich to more Fe-, Ca- and Al-rich compositions are consistent with the formation of the layered sequence by magmatic accumulation from mafic tholeiitic magmas with varying degrees of differentiation. The cumulates are characterised by extremely low levels of ‘incompatible’ elements (K, Ba, Rb, P, Zr, Nb, Hf, Y and REE) at all levels of differentiation. REE patterns are strongly depleted in LREE; HREE abundances range from ≦0.3 chondrites in peridotite to 3 x chondrites in the norite-gabbros.

Population Mobility and Development: Southeast Asia and the Pacific.

This publication contains papers from an international conference held in 1980 to examine internal migration and its implications for economic development in Southeast Asia and the Pacific region. Papers in Part 1 are concerned with the variety and forms of population mobility with a focus on circular or temporary population movements. In Parts 2 and 3 findings are presented from micro-level studies of population mobility in the region as a whole and in Malaysia northern Thailand Yogyakarta and Papua New Guinea in particular. Emphasis is placed on the variety of mobility patterns and on the analysis of linkages between areas of origin and destination through family ties remittance patterns return migration and employment. Part 4 concerns policy issues relating to urbanization and transport. Papers are included on the adjustment of aborigine migrants to Adelaide Australia; the role of medium-sized towns in mobility trends in Papua New Guinea; rural-urban migration in Fiji; and the relationship between population mobility and changing transport patterns in Indonesia. In Part 5 policy issues relating to employment and mobility are considered. The evidence for rural labor shortages in the region is reviewed and migration-related policies in Peninsular Malaysia are evaluated.

Paleomagnetic Evidence for Large Microplate Rotations in the Southwest Pacific: ABSTRACT

The Bismark Archipelago of northern Papua New Guinea shows evidence of an Eocene to Holocene island-arc system. Originally north-facing, the arc reversed in the late Miocene, and was partly disrupted by marginal basin sea-floor spreading in the Bismark basin from late Pliocene to Recent. Paleomagnetic data has been collected and analyzed from over 200 sites throughout the archipelago. Principal component analysis has shown moderate angular motion of New Britain, associated with back-arc spreading. Large angular rotation of island-arc microplates has been detected from earlier epochs. These microplates appear not to be disrupted by internal block rotations, but appear amenable to conventional plate tectonic analysis techniques. End_of_Article - Last_Page 966------------

Petrology and Petrogenesis of Cumulate Peridotites and Gabbros from the Marum Ophiolite Complex, Northern Papua New Guinea

Petrology and Petrogenesis of Cumulate Peridotites and Gabbros from the Marum Ophiolite Complex, Northern Papua New Guinea

Biting prevalence and malaria transmission patterns in the Anopheles punctulatus complex (Diptera: Culicidae) in Papua New Guinea.

Seasonal prevalence and malaria transmission patterns of Anopheles farauti, An. punctulatus and An. koliensis were studied in two coastal and two inland villages in the Madang district of northern Papua New Guinea. The monthly manbiting rates (average biting density of vector mosquitoes per man per night) were observed over a two-year period to establish typical seasonal prevalence patterns. Observations on the frequency of feeding and the human blood index were combined to derive the manbiting habit. A daily survival rate was determined from the dissection of mosquito ovaries by Polovodova's age-grading method. The extrinsic cycle in the mosquito was not observed, and the value for this parameter was extracted from the literature. All parameters were combined to estimate the monthly variations in vectorial capacity of each of the vector species, and the vectorial capacities of the individual species were added together to give a total monthly vectorial capacity of the punctulatus complex in each locality. The results showed that malaria transmission can be perennial, with a period of more intense transmission between August and January in the southern area, and between September and February in the northern. A period of very low transmission can be expected between February/March and July/August.

High-K2O island-arc volcanic rocks from the Finisterre and Adelbert Ranges, northern Papua New Guinea

Research Article| June 01, 1976 High-K2O island-arc volcanic rocks from the Finisterre and Adelbert Ranges, northern Papua New Guinea A. L. JAQUES A. L. JAQUES 1Geological Survey of Papua New Guinea, Box 778, Port Moresby, Papua New Guinea Search for other works by this author on: GSW Google Scholar Author and Article Information A. L. JAQUES 1Geological Survey of Papua New Guinea, Box 778, Port Moresby, Papua New Guinea Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1976) 87 (6): 861–867. https://doi.org/10.1130/0016-7606(1976)87<861:HIVRFT>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation A. L. JAQUES; High-K2O island-arc volcanic rocks from the Finisterre and Adelbert Ranges, northern Papua New Guinea. GSA Bulletin 1976;; 87 (6): 861–867. doi: https://doi.org/10.1130/0016-7606(1976)87<861:HIVRFT>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract A thick, extensive volcanic formation of Oligocene to early Miocene age, the Finisterre Volcanics, forms part of a Cenozoic sequence comprising the Finisterre and Adelbert Ranges of northern Papua New Guinea. The formation contains a high proportion of diverse volcaniclastic rocks and is lithologically similar to volcanic sequences described from island-arc assemblages elsewhere. The volcanic rocks are dominantly potassic basalt and low-silica andesite (48 to 56 percent SiO2) containing 1.5 to 6.5 percent K2O and having low TiO2 content typical of circumoceanic volcanic rocks. Two main groups can be recognized: abundant shoshonite and related rocks (absarokite, rare leucite trachyte) and high-K, high-Al basalt (with some high-K, low-Si andesite).The Finisterre Volcanics are chemically similar to high-K rocks described from island arcs elsewhere in the southwest Pacific and in the Mediterranean. However, unlike some other island arcs, there is no evidence of a three-stage evolution from arc tholeiite to calc-alkalic andesite to shoshonite. The volcanic rocks probably formed in a volcanic arc that developed north of a northeastward-dipping subduction zone in response to early Tertiary plate interactions. The Finisterre volcanic magmas may have originated by partial melting of mantle material modified by slab-derived silicic melts. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.