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Pogonophryne tronio, a new species of Antarctic short-barbeled plunderfish (Perciformes: Notothenioidei: Artedidraconidae) from the deep Ross Sea with new data on Pogonophryne brevibarbata

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Abstract

Antarctic barbeled plunderfishes of the genus Pogonophryne are the most speciose notothenioid group, comprising about 20 poorly known recognized species. The interspecific systematics within the genus is complex, because the various species vary little morphologically. One of these previously unknown forms captured as by-catch of the Antarctic toothfish (Dissostichus mawsoni) fishery during the Antarctic summer 2009–2010 in deep waters of the western Ross Sea is described herein as new species Pogonophryne tronio. The description is based on 2 adult specimens, captured at depths 900–1,015 m: the holotype (male, 290 mm TL, 234 mm SL), paratype (female, 315 mm TL, 260 mm SL). This species, a short-barbeled form of the dorsally spotted “P. mentella” group of species, is compared morphologically to the closely related P. brevibarbata and P. ventrimaculata, using type specimens of both species. P. tronio sp. n. is characterized by the following combination of characters: a short (about 10–12 % SL), slender, tapered and bicolored (dark basally, light distally) mental barbel without a conspicuous terminal expansion; tip of barbel slightly flattened and covered by short tapered finger-like processes basally and flattened, leaf-like processes distally; a slightly protruding lower jaw; a relatively low (about 18 % SL) second dorsal fin lacking the elevated anterior lobe occurring in males of some species in the genus, sharply striped pectoral and caudal fins; the dorsal surface of the head and the area anterior to the first dorsal fin covered with large dark-brown blotches and spots.

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Acknowledgments

We would like to thank Juan Agulló Garcia, a Spanish scientific observer (Instituto Español de Oceanografía, Santa Cruz de Tenerife) for his encouragement and very useful assistance in separating of by-catch fishes from the hauls of Antarctic toothfish. We are very thankful to the crew of F/V Tronio, especially to captain Modesto Riveira, for their helping in collecting of fishes and in processing of preliminary technical data during the cruise. Also, we are very grateful to Juan Regal (Grupo Regal, Spain), the owner of the vessel, for his understanding of the relevance of scientific work on board of the commercial fishery vessel and for his personal attentive interest favouring the scientific investigations of Antarctic fishes. Our thanks also due to Marina Kovalenko (lecturer, KhNU) for identifying of parasite, Dmytro Kryvokhyzha (master student, Uppsala University, Sweden) for his technical assistance during preparation of the manuscript and Joseph Eastman (Ohio University, Athens, USA) and Tetsuo Iwami (Tokyo Kasei Gakuin University, Japan) for their useful comments which significantly improved the manuscript.

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Authors and Affiliations

  1. Department of Zoology and Animal Ecology, School of Biology, V. N. Karazin Kharkiv National University (KhNU), 4 Pl. Svobody, 61022, Kharkiv, Ukraine

    Gennadiy A. Shandikov

  2. 31223 Johnston Road, Guys Mills, PA, 16327, USA

    Richard R. Eakin

  3. Southern Scientific-Research Institute of Marine Fisheries and Oceanography (YugNIRO), 2 Sverdlova Str., 98300, Kerch, Crimea, Ukraine

    Sergey Usachev

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  1. Gennadiy A. Shandikov
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  2. Richard R. Eakin
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  3. Sergey Usachev
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Correspondence to Gennadiy A. Shandikov.

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Shandikov, G.A., Eakin, R.R. & Usachev, S. Pogonophryne tronio, a new species of Antarctic short-barbeled plunderfish (Perciformes: Notothenioidei: Artedidraconidae) from the deep Ross Sea with new data on Pogonophryne brevibarbata . Polar Biol 36, 273–289 (2013). https://doi.org/10.1007/s00300-012-1258-4

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  • DOI: https://doi.org/10.1007/s00300-012-1258-4

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