White William T, Appleyard Sharon A, Sabub Benthly, Kyne Peter M, Harris Mark, Lis Rickson, Baje Leontine, Usu Thomas, Smart Jonathan J, Corrigan Shannon, Yang Lei, Naylor Gavin J P
Australian National Fish Collection, National Research Collections Australia, Commonwealth Scientific and Industrial Research Organisation, Hobart, Tasmania, Australia; Oceans & Atmosphere, Commonwealth Scientific and Industrial Research Organisation, Hobart, Tasmania, Australia.
National Fisheries Authority, National Capital District, Port Moresby, Papua New Guinea.
PLoS One. 2015 Oct 7;10(10):e0140075. doi: 10.1371/journal.pone.0140075. eCollection 2015.
Recent surveys of the shark and ray catches of artisanal fishers in the Western Province of Papua New Guinea (PNG) resulted in the rediscovery of the threatened river sharks, Glyphis garricki and Glyphis glyphis. These represent the first records of both species in PNG since the 1960s and 1970s and highlight the lack of studies of shark biodiversity in PNG. Two individuals of G. garricki and three individuals of G. glyphis were recorded from coastal marine waters of the Daru region of PNG in October and November 2014. The two G. garricki specimens were small individuals estimated to be 100-105 cm and ~113 cm total length (TL). The three G. glyphis specimens were all mature, one a pregnant female and two adult males. These are the first adults of G. glyphis recorded to date providing a more accurate maximum size for this species, i.e. ~260 cm TL. A single pup which was released from the pregnant female G. glyphis, was estimated to be ~65 cm TL. Anecdotal information from the fishers of pregnant females of G. glyphis containing 6 or 7 pups provides the first estimate of litter size for this species. The jaws of the pregnant female G. glyphis were retained and a detailed description of the dentition is provided, since adult dentition has not been previously documented for this species. Genetic analyses confirmed the two species cluster well within samples from these species collected in northern Australia.
近期对巴布亚新几内亚西部省份（PNG）个体渔民捕获的鲨鱼和鳐鱼的调查，使得受威胁的露齿鲨属（Glyphis）河流鲨鱼，即加氏露齿鲨（Glyphis garricki）和恒河露齿鲨（Glyphis glyphis）被重新发现。这些是自20世纪60年代和70年代以来这两个物种在巴布亚新几内亚的首次记录，并凸显了该国鲨鱼生物多样性研究的匮乏。2014年10月和11月，在巴布亚新几内亚达鲁地区的沿海水域记录到了2条加氏露齿鲨和3条恒河露齿鲨。这2条加氏露齿鲨标本为小型个体，估计全长分别为100 - 105厘米和约113厘米。3条恒河露齿鲨标本均为成年个体，1条为怀孕雌鲨，2条为成年雄鲨。这些是迄今记录到的恒河露齿鲨成年个体，从而为该物种提供了更准确的最大体长，即约260厘米全长。从怀孕的恒河露齿鲨雌鲨产出的1只幼鲨，估计全长约65厘米。渔民提供的关于怀有6或7只幼鲨的恒河露齿鲨怀孕雌鲨的传闻信息，是该物种首次产仔数估计。怀孕的恒河露齿鲨雌鲨的颌骨被保留，并提供了牙齿的详细描述，因为此前该物种的成年牙齿未曾有过记录。遗传分析证实，这两个物种在从澳大利亚北部收集的这些物种样本中聚类良好。
