DOCSLIB.ORG

(GIS) Atlas of Cephalopod Distribution in the Southern Ocean

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Antarctic Science 11 (I): 61-62 (1999) Short note A Geographical Information System (GIS) Atlas of cephalopod distribution in the Southern Ocean J.C. XAVIER1,2,P.G. RODHOUSEl, P.N. TRATHANI and A.G. WOOD1 'BritishAntarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 OET, UK 2Universidadedo Algarve, Campus de Gambelas, 8000 Faro, Portugal Received 12 May 1998, accepted 14 September 1998 Introduction Results The geographic distributions of many Antarctic cephalopod A total of 2497 geographic positions of 21 species of squid species are not well understood. Many may be influenced by (suborder Oegopsida) were obtained, combining data from physical factors such as watermasses, iceextent or bathymetry. 1886 (Challenger Expedition) to 1997. There are huge areas For example, there is an apparent association of mesoscale without any geographic positions that appear under-sampled. oceanographic features with some species (Rodhouse et al. The best represented species were G. glacialis (625 geographic 1996). Such associations suggest certain physical factors in positions), B. picta (412), T. filippovae (293), B. abyssicola the environment that may be predictors of foraging locations (250), M.hamiltoni (188), M. hyadesi (184) and P. glacialis for cephalopods and/or their predators. Improving our (112). understanding of such interrelations is important in developing The maps of the species distribution in relation to bathymetry, a better scientific basis for conservation and sustainable ocean fronts and sea-ice extent are on World Wide Web page: management of commercial fisheries (Trathan et al. 1993). http://www.nerc-bas.ac.uWpublic/dsd/squid-atlas/ A detailed bibliography is also provided there. Material and methods Discussion Data were obtained from published papers, published reports and unpublished data held at the British Antarctic Survey, UK. GIS is a very useful tool in marine biology. It has been used The species studied, from suborder Oegopsida, were: in marine fisheries (Waluda & Pierce in press), fisheries Kondakovia longimana, Moroteuthis ingens, Moroteuthis assessment and management (Trathan et al. in press) and knipovitchi, M. robsoni, Gonatus antarcticus, Histioteuthis planning of artificial aquatic habitat developments (Gordon atlantica, H. eltaninae, H. macrohista, H. miranda, Batoteuthis 1994). In this study we demonstrate the ability of GIS to skolops, Psychroteuthis glacialis, Alluroteuthis antarcticus, handle large amount of data from different sources, particularly Bathyteuthis abyssicola, Brachioteuthis ?picta, Martialia cephalopod species distribution. hyadesi, Todarodes filippovae, Chiroteuthis veranyi, One of the advantages of GIS is the capacity for adding new Mastigoteuthis psychrophila, Galiteuthis glacialis, data to the system. The species distribution maps produced Mesonychoteuthis hamiltoni and Taonius sp (cf pavo). The within the GIS can be updated as soon as more data are data utilized were from commercial and scientific fishing available and can be made available via Internet. The use of gear. GIS and Internet technology combined will allow the scientific Data were compiled from the different sources including as community to haveeasy access to themost recent information. much detail as possible. The minimum information required The compilation of data in the different maps allows certain was species name and location (latitude and longitude). important aspects of squid ecology, such as distribution, to be After loading into Arc/lnfo (ESRI), a Geographical examined. Information System, three maps were produced for each There are large areas with no data. Though research surveys species: species distribution with bathymetry; species may have covered some of these areas, a large number of distribution with oceanic fronts, and species distribution with reports were rejected because no gear was specified or because winterkummer sea-ice extent. of the inability of the specified gear to catch squid. In various The bathymetry was taken from the GEBCO Digital Atlas reports, the gear used was designed to sample other species (Jones et al. 1994), oceanic fronts from Orsi et al. (1995) and (i.e. krill) and squid were merely a by-catch. Thus, it is sea-ice extent from Gloersen et al. (1992). The winter and possible that some catches taken by scientific nets were not summer sea-ice extent used are mean monthly Antarctic sea- representative of the population (Rodhouse et al. 1996). ice concentrations from the ScanningMultichannel Microwave Despite this, most data were obtained with scientific nets as Radiometer average over 1978-87 (Gloersen et al. 1992). there are no squid fishery data from Antarctic waters. In the future new fisheries may improve available data (Gonzalez & 61 Downloaded from https://www.cambridge.org/core. Open University Library, on 17 Jan 2020 at 09:40:39, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0954102099000097 62 J.C. XAVIER eta/. Rodhouse 1998). sutellite-microwuve observations rind analysis. NASA SP, 5 1 I. Washington, DC: NASA, 206 pp. Most species had geographic positions south of the Antarctic GONZALEZ,A.F. & RODHOUSE,P.G. 1998. Fishery biology of the seven Polar Front (APF), in Antarctic waters. The only species that star flying squid Martiuliu hyudesi at South Georgia during winter. were not found in Antarctic waters were H. atlantica, Polar Biology, 19, 231-236. H. miranda and H. macrohista; these were geographically GORDON,W.J. 1994. A role for comprehensive planning, Geographical distributed in subantarctic and subtropical waters. Information Systems (CIS) technologies and program evaluation in aquatic habitat development. Bulletin of Murine Science, 55, The muscular families Ommastrephidae and 995- 1013. Onychoteuthidae are mainly distributed in subantarctic and JONES,M.T., TABOR,A.R. & WEATHERALL,P. 1994. Supporfing volume subtropical waters while the ammoniacal families to the GEBCO Digital Atlas (general bathymetric chart of the Histioteuthidaeand Cranchiidae are mainly found in Antarctic oceans). Birkenhaed: British Oceanographic Data Centre, NERC, and subantarctic waters. Thismay indicate that morphological 70PP. features, such as the presence or absence of ammoniacal KUBODERA,T. 1989. Young squids collected with 10-foot IKPT nel during the JARE-28 cruise, 1987. Proceedings qf NIPR Synzposiurn tissues, affect the geographic distribution of squid species. Off Oh‘ BiOlOgy, 2, 7 1-77 Futhermore, in this case, these families seem to be NEMOTO,T., OKIYAMA,M., IWASAKI,N. & KIKUCHI,T. 1988. Squid as complementary in their geographic distribution. predators on krill (Euphuusiu superbu) and prey for sperm whales in Geographic distribution of several species, south of the the Southern Ocean. In SAHRHACE,D., ed. Antarctic Ocean und APF, within the summer ice extent, suggested that they are resource.v variability. Berlin: Springer-Verlag, 292-296. NESIS,K.N. 1994. Teuthofauna of Walters Shoals, a seamount in the endemic to Antarctic waters: K. longimana, A. antarcticus, southwestern Indian Ocean. Ruthenicu. 4, 67-77. M. knipovitchi (Okutani & Clarke 1985), M. hamiltoni, OKUTANI,T. & CLARKE,M.R. 1985. Identification key and species G. glacialis, B. picta, H. eltaninae, B. skolops,M. psychrophila. distribution for Antarctic squids. BIOMASS handbook, 21, 1-57, B. abyssicola is also present in the winter and summer extent, ORSI,A.H., WHITWORTH111, T. & NOWLINJR, W.D. 1995. On the but because it is cosmopolitan elsewhere in the worlds’ ocean ineridional extent and fronts of the Antarctic Circumpolar Current. Deep-sea Reseurch, 42, 641-673. (Filippova 1972), it is probably also cosmopolitan in Antarctic RODHOUSE,P.G. 1998. Todurodes,filipovoein the Southern Ocean: an waters. appraisal of knowledge relevant to exploitation and management. liz The species with circumpolar distributions in the Antarctic OKUTANI,T., ed. Large pelagic squids. Tokyo: Japan Marine Fishery are: C. glacialis, M. hamiltoni, P. glacialis, A. antarcticus Resources Research Center, 207-215. (Rodhouse & Piatkowski 1995), K. longimana (Roper et al. RODHOUSE,P.G. 1989. Pelagic cephalopods caught by nets during thsz Antarctic research cruises of the ‘Polursfern’and ‘ Wulter Herwig’, 1985), M.psychrophila (Rodhouse 1990) and M. knipovitchi 1985- 1987. Archiv ,fur Fischereiwissenschuft, 39, 1 1 1 - 12 1. (Nemoto et al. 1988). RODHOUSE,P.G. 1990. Cephalopod fauna of the Scotia Sea at South Mesonychoteuthis hamiltoni is also found north of the Georgia: potential for commercial exploitation and possible Subtropical Front (STF), although Clarke (1 980) considered consequences. In KERRY,K. & HEMPEL,G., eds. Ecologicul change this front to be an oceanographic barrier to this species. and the conservufion of Antarctic ecosystems. Berlin: Springer- Verlag, 289-298. All species were present in oceanic waters, but some were RODHOUSE,P.G. & PIATKOWSKI,U. 1995. Fine-scale distribution c,f also associated with coastal waters (A. antarcticus (Kubodera juvenile cephalopods in the Scotia Sea and adaptive allometry of the 1989), H. eltaninae (Voss et al. 1998) and P. glacialis brachial crown. Murine Biology, 124, 11 1-1 17. (Rodhouse 1989)),groups of islands (M.knipovitchi (Rodhouse RODHOUSE,P.G., PRINCE,P.A., TRATHAN,P.N., HATFIELD,E.M.C., 1989)), continental shelves (M. ingens, G. antarcticus (Roper WATKINS,J.L., BONE,D.G., MURPHY,E.J. & WHITE,M.G. 1996. Cephalopods and mesoscale oceanography at the Antarctic Polar et
Recommended publications
  • A Review of Southern Ocean Squids Using Nets and Beaks

    A Review of Southern Ocean Squids Using Nets and Beaks

    Marine Biodiversity (2020) 50:98 https://doi.org/10.1007/s12526-020-01113-4 REVIEW A review of Southern Ocean squids using nets and beaks Yves Cherel1 Received: 31 May 2020 /Revised: 31 August 2020 /Accepted: 3 September 2020 # Senckenberg Gesellschaft für Naturforschung 2020 Abstract This review presents an innovative approach to investigate the teuthofauna from the Southern Ocean by combining two com- plementary data sets, the literature on cephalopod taxonomy and biogeography, together with predator dietary investigations. Sixty squids were recorded south of the Subtropical Front, including one circumpolar Antarctic (Psychroteuthis glacialis Thiele, 1920), 13 circumpolar Southern Ocean, 20 circumpolar subantarctic, eight regional subantarctic, and 12 occasional subantarctic species. A critical evaluation removed five species from the list, and one species has an unknown taxonomic status. The 42 Southern Ocean squids belong to three large taxonomic units, bathyteuthoids (n = 1 species), myopsids (n =1),andoegopsids (n = 40). A high level of endemism (21 species, 50%, all oegopsids) characterizes the Southern Ocean teuthofauna. Seventeen families of oegopsids are represented, with three dominating families, onychoteuthids (seven species, five endemics), ommastrephids (six species, three endemics), and cranchiids (five species, three endemics). Recent improvements in beak identification and taxonomy allowed making new correspondence between beak and species names, such as Galiteuthis suhmi (Hoyle 1886), Liguriella podophtalma Issel, 1908, and the recently described Taonius notalia Evans, in prep. Gonatus phoebetriae beaks were synonymized with those of Gonatopsis octopedatus Sasaki, 1920, thus increasing significantly the number of records and detailing the circumpolar distribution of this rarely caught Southern Ocean squid. The review extends considerably the number of species, including endemics, recorded from the Southern Ocean, but it also highlights that the corresponding species to two well-described beaks (Moroteuthopsis sp.
  • CEPHALOPODS 688 Cephalopods

    CEPHALOPODS 688 Cephalopods

    click for previous page CEPHALOPODS 688 Cephalopods Introduction and GeneralINTRODUCTION Remarks AND GENERAL REMARKS by M.C. Dunning, M.D. Norman, and A.L. Reid iving cephalopods include nautiluses, bobtail and bottle squids, pygmy cuttlefishes, cuttlefishes, Lsquids, and octopuses. While they may not be as diverse a group as other molluscs or as the bony fishes in terms of number of species (about 600 cephalopod species described worldwide), they are very abundant and some reach large sizes. Hence they are of considerable ecological and commercial fisheries importance globally and in the Western Central Pacific. Remarks on MajorREMARKS Groups of CommercialON MAJOR Importance GROUPS OF COMMERCIAL IMPORTANCE Nautiluses (Family Nautilidae) Nautiluses are the only living cephalopods with an external shell throughout their life cycle. This shell is divided into chambers by a large number of septae and provides buoyancy to the animal. The animal is housed in the newest chamber. A muscular hood on the dorsal side helps close the aperture when the animal is withdrawn into the shell. Nautiluses have primitive eyes filled with seawater and without lenses. They have arms that are whip-like tentacles arranged in a double crown surrounding the mouth. Although they have no suckers on these arms, mucus associated with them is adherent. Nautiluses are restricted to deeper continental shelf and slope waters of the Indo-West Pacific and are caught by artisanal fishers using baited traps set on the bottom. The flesh is used for food and the shell for the souvenir trade. Specimens are also caught for live export for use in home aquaria and for research purposes.
  • <I>Onychoteuthis</I> Lichtenstein, 1818

    <I>Onychoteuthis</I> Lichtenstein, 1818

    BULLETIN OF MARINE SCIENCE, 83(3): 481–529, 2008 NEW TAXA PAPER TWO NEW SPECIES AND A REVIEW OF THE SQUID GENUS ONYCHOTEUTHIS LICHTENSTEIN, 1818 (OEGOPSIDA: ONYCHOTEUTHIDAE) FROM THE PACIFIC OCEAN K. S. Bolstad ABSTRACT The onychoteuthid genusOnychoteuthis Lichtenstein, 1818 is in systematic disarray. The oldest species, Onychoteuthis banksii (Leach, 1817), is widely recognized as a species complex, with which two of the other commonly recognized three species—Onychoteuthis compacta (Berry, 1913) and Onychoteuthis borealijaponica Okada, 1927—and some 20 additional names have been all synonymized at one time. This study, a partial revision of the genus, redescribes O. banksii from the Atlantic Ocean; from the Pacific, O. compacta, O. borealijaponica, and Onychoteuthis meridiopacificaRancurel and Okutani, 1990, are redescribed, the name Onychoteuthis aequimanus Gabb, 1868, is resurrected, and two additional species are described: Onychoteuthis lacrima sp. nov., and Onychoteuthis prolata sp. nov. Several new species-level characters are examined in detail, compared, and reported for each species, including buccal morphology, tentacular club and hook morphology, chromatophore patterns on the mantle and tentacles, and photophore shape and size. The cosmopolitan tropical/temperate genus Onychoteuthis has long been recog- nized for its systematic instability (Kubodera et al., 1998; Vecchione et al., 2003). Onychoteuthis banksii (Leach, 1817) has been a catch-all name for many morpho- logically similar taxa since its description nearly 200 yrs ago (Vecchione et al., 2003), including: two of the additional three species generally recognized by recent authors—Onychoteuthis compacta (Berry, 1913) and Onychoteuthis borealijaponica Okada, 1927, at various times—and about 20 additional nominal species (see e.g., Pfeffer, 1912; Adam, 1952).
  • Peruvian Humboldt Current System J

    Peruvian Humboldt Current System J

    3rd Meeting of the Scientific Committee Port Vila, Vanuatu 28 September - 3 October 2015 SC-03-27 Main Biological and fishery aspects of the Jumbo squid in the Peruvian Humboldt Current System J. Csirke, A. Alegre, J. Argüelles, R. Guevara-Carrasco, L. Mariátegui, M. Segura, R. Tafúr & C. Yamashiro South Pacific Regional Fisheries Management Organisation 28 Aug 15 3rd Meeting of the Scientific Committee SC-03-17 Port Vila, Vanuatu, 28 September - 3 October 2015 Main biological and fishery aspects of the jumbo squid (Dosidicus gigas) in the Peruvian Humboldt Current System by Jorge Csirke, Ana Alegre, Juan Argüelles, Renato Guevara-Carrasco, Luís Mariátegui, Marceliano Segura, Ricardo Tafúr and Cármen Yamashiro Instituto del Mar del Perú (IMARPE), Chucuito, Callao, Perú Summary Jumbo squid (Dosidicus gigas) is found in high abundance along the whole Peruvian coast from 10 to more than 500 nm from the coast. Performs diel vertical migrations from 0 to more than 650 m depth, and regular inshore-offshore ontogenetic migrations and less regular latitudinal migrations of several hundred miles. Younger and/or smaller jumbo squids predominate in oceanic waters, while larger jumbo squids are more neritic. Maintains some reproductive activity all year round, with increased reproductive activity from July to February and peaks between October and January. Life span is usually one year, although some specimens can live up to two years. Slight differences in the age or size of sexual maturity and main distribution areas suggests that there are least three strains, groups or population subunits of jumbo squid inhabiting the Peruvian Humboldt Current System. Is a very aggressive predator and prey availability seems to be more important than temperature or other environmental parameters in shaping its geographic distribution.
  • A Short Note on the Cephalopods Sampled in the Angola Basin During the DIVA-1 Expedition Uwe Piatkowskiã, Rabea Diekmann

    A Short Note on the Cephalopods Sampled in the Angola Basin During the DIVA-1 Expedition Uwe Piatkowskiã, Rabea Diekmann

    ARTICLE IN PRESS Organisms, Diversity & Evolution 5 (2005) 227–230 www.elsevier.de/ode RESULTS OF THE DIVA-1 EXPEDITION OF RV ‘‘METEOR’’ (CRUISE M48/1) A short note on the cephalopods sampled in the Angola Basin during the DIVA-1 expedition Uwe PiatkowskiÃ, Rabea Diekmann IFM-GEOMAR, Leibniz-Institut fu¨r Meereswissenschaften an der Universita¨t Kiel, Du¨sternbrooker Weg 20, D-24105 Kiel, Germany Abstract Five cephalopods, all belonging to different species, were identified from deep-sea trawl samples conducted during the DIVA 1-expedition of RV ‘‘Meteor’’ in the Angola Basin in July 2000. These were the teuthoid squids Bathyteuthis abyssicola, Brachioteuthis riisei, Mastigoteuthis atlantica, Galiteuthis armata, and the finned deep-sea octopus Grimpoteuthis wuelkeri. The present study contributes information on size, morphometry, biology and distribution of the species form this unique cephalopod collection. r 2004 Elsevier GmbH. All rights reserved. Keywords: Cephalopoda; Deep-sea; Angola Basin; Cirrate octopods Introduction captured. These circumstances demonstrate the great scientific value of any cephalopod sampled from deep- Cephalopods in the bathyal and abyssal ecosystems sea habitats. The abyssal plains still belong to the most have been the subject of only a limited number of studies unknown regions in the oceans. One of these plains, the due to the obvious difficulties involved in collecting Angola Basin was sampled during the RV ‘‘Meteor’’ them adequately at such great depths (Voss 1967; expedition in 2000. In the present study, we provide Villanueva 1992). A further drawback relates to their information on a small collection of cephalopods which delicate bodies, which are frequently damaged almost have been caught during the expedition and which beyond recognition in trawl samples.
  • Cephalopoda: Ommastrephidae) in the Southeastern Pacific Revista De Biología Marina Y Oceanografía, Vol

    Cephalopoda: Ommastrephidae) in the Southeastern Pacific Revista De Biología Marina Y Oceanografía, Vol

    Revista de Biología Marina y Oceanografía ISSN: 0717-3326 [email protected] Universidad de Valparaíso Chile Nigmatullin, Chingis M.; Shchetinnikov, Alexander S.; Shukhgalter, Olga A. On feeding and helminth fauna of neon flying squid Ommastrephes bartramii (Lesueur, 1821) (Cephalopoda: Ommastrephidae) in the southeastern Pacific Revista de Biología Marina y Oceanografía, vol. 44, núm. 1, abril, 2009, pp. 227-235 Universidad de Valparaíso Viña del Mar, Chile Available in: http://www.redalyc.org/articulo.oa?id=47911450023 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Revista de Biología Marina y Oceanografía 44(1): 227-235, abril de 2009 On feeding and helminth fauna of neon flying squid Ommastrephes bartramii (Lesueur, 1821) (Cephalopoda: Ommastrephidae) in the southeastern Pacific Alimentación y fauna de helmintos del calamar rojo Ommastrephes bartramii (Cephalopoda: Ommastrephidae) en el Pacífico sudeste Chingis M. Nigmatullin1, Alexander S. Shchetinnikov1 and Olga A. Shukhgalter1 1Atlantic Research Institute of Marine Fisheries and Oceanography (AtlantNIRO), Donskoj Str. 5, Kaliningrad, 236000 Russia [email protected] Resumen.- Se analizó el contenido estomacal de 60 en el 43,3% de los estómagos e incluyó copépodos, ostrácodos, calamares Ommastrephes bartramii (160-392 mm mantle anfípodos, eufáusidos, camarones, moluscos tecosomados, length, ML) recolectados en el Pacífico sudeste (entre 17° y heterópodos y quetognatos. Se encontraron seis especies de 43°S), entre 1981 y 1984. Adicionalmente otros 22 calamares helmintos parásitos en estado larval, con una prevalencia total (165-365 mm ML) fueron examinaron por parásitos helmintos.
  • An Illustrated Key to the Families of the Order

    An Illustrated Key to the Families of the Order

    CLYDE F. E. ROP An Illustrated RICHARD E. YOl and GILBERT L. VC Key to the Families of the Order Teuthoidea Cephalopoda) SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY • 1969 NUMBER 13 SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY NUMBER 13 Clyde F. E. Roper, An Illustrated Key 5K?Z" to the Families of the Order Teuthoidea (Cephalopoda) SMITHSONIAN INSTITUTION PRESS CITY OF WASHINGTON 1969 SERIAL PUBLICATIONS OF THE SMITHSONIAN INSTITUTION The emphasis upon publications as a means of diffusing knowledge was expressed by the first Secretary of the Smithsonian Institution. In his formal plan for the Institution, Joseph Henry articulated a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge not strictly professional." This keynote of basic research has been adhered to over the years in the issuance of thousands of titles in serial publications under the Smithsonian imprint, commencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: Smithsonian Annals of Flight Smithsonian Contributions to Anthropology Smithsonian Contributions to Astrophysics Smithsonian Contributions to Botany Smithsonian Contributions to the Earth Sciences Smithsonian Contributions to Paleobiology Smithsonian Contributions to Zoology Smithsonian Studies in History and Technology In these series, the Institution publishes original articles and monographs dealing with the research and collections of its several museums and offices and of professional colleagues at other institutions of learning. These papers report newly acquired facts, synoptic interpretations of data, or original theory in specialized fields.
  • Ommastrephidae 199

    Ommastrephidae 199

    click for previous page Decapodiformes: Ommastrephidae 199 OMMASTREPHIDAE Flying squids iagnostic characters: Medium- to Dlarge-sized squids. Funnel locking appara- tus with a T-shaped groove. Paralarvae with fused tentacles. Arms with biserial suckers. Four rows of suckers on tentacular clubs (club dactylus with 8 sucker series in Illex). Hooks never present hooks never on arms or clubs. One of the ventral pair of arms present usually hectocotylized in males. Buccal connec- tives attach to dorsal borders of ventral arms. Gladius distinctive, slender. funnel locking apparatus with Habitat, biology, and fisheries: Oceanic and T-shaped groove neritic. This is one of the most widely distributed and conspicuous families of squids in the world. Most species are exploited commercially. Todarodes pacificus makes up the bulk of the squid landings in Japan (up to 600 000 t annually) and may comprise at least 1/2 the annual world catch of cephalopods.In various parts of the West- ern Central Atlantic, 6 species of ommastrephids currently are fished commercially or for bait, or have a potential for exploitation. Ommastrephids are powerful swimmers and some species form large schools. Some neritic species exhibit strong seasonal migrations, wherein they occur in huge numbers in inshore waters where they are accessable to fisheries activities. The large size of most species (commonly 30 to 50 cm total length and up to 120 cm total length) and the heavily mus- cled structure, make them ideal for human con- ventral view sumption. Similar families occurring in the area Onychoteuthidae: tentacular clubs with claw-like hooks; funnel locking apparatus a simple, straight groove.
  • Dosidicus Gigas Fisheries Relating to the South Pacific Fisheries Management Organisation

    Dosidicus Gigas Fisheries Relating to the South Pacific Fisheries Management Organisation

    Information describing Dosidicus gigas fisheries relating to the South Pacific Fisheries Management Organisation (c)2003 MBARI Sonja Heinrich, 2004 WORKING DRAFT 04 MAY 2007 1. Overview.......................................................................................................................2 2. Taxonomy.....................................................................................................................3 2.1 Phylum..................................................................................................................3 2.2 Class.....................................................................................................................3 2.3 Order.....................................................................................................................3 2.4 Family...................................................................................................................3 2.5 Genus and species.................................................................................................3 2.6 Scientific synonyms...............................................................................................3 2.7 Common names.....................................................................................................3 2.8 Molecular (DNA or biochemical) bar coding.........................................................3 3. Species characteristics....................................................................................................3 3.1 Global distribution
  • Cephalopods Distribution in the Southern Aegean Sea

    Cephalopods Distribution in the Southern Aegean Sea

    Mediterranean Marine Science Vol. 4/1, 2003, 79-86 Cephalopods distribution in the southern Aegean Sea E. LEFKADITOU1, P. PERISTERAKI2, P. BEKAS1, G. TSERPES2, C-Y. POLITOU1 and G. PETRAKIS1 1 Hellenic Centre for Marine Research, Agios Kosmas, Helliniko, 16604 Athens, Greece e-mail: [email protected] 2 Institute of Marine Biology of Crete, PO Box 2214, 71003 Iraklio, Greece e-mail: [email protected] Abstract The present study concerns faunal composition and distribution of cephalopods in the southern Aegean Sea (35Æ 13’ 19’’- 37Æ 55’ 25’’ N, 23Æ 00’ 15’’ - 28Æ 15’ 37’’ E). Samples were collected from 708 hauls, obtained by an experimental bottom trawl net during eight surveys carried out in the summers of the years 1994-2001, as well as by commercial trawl net during four surveys carried out in September 1995, December 1995, May and September 1996. The hauls were performed at depths ranging from 16 to 778 m. A total of 34 species of cephalopod in 12 families were identified, including 11 oegopsid squid, 3 myopsid squid, 7 octopod, 3 cuttlefish and 10 sepiolid. Trawling with the experimental net resulted in the capturing of some uncommon pelagic species, such as Ctenopteryx sicula and Octopoteuthis sicula, which were recorded for the first time in the Aegean Sea. Most of the species showed a wide depth and geographical range. The species: Sepia officinalis, Sepietta neglecta, Sepietta obscura and Sepiola rondeleti were caught only on the continental shelf, whereas the Ancistroteuthis lichtensteini, Bathypolypous sponsalis, Brachioteuthis riisei, Chiroteuthis veranyi, Ctenopteryx sicula, Heteroteuthis dispar, Histioteuthis reversa, Neorossia caroli and Pyroteuthis margaritifera were found only on the slope.
  • Comparison of Size Selectivity Between Marine Mammals and Commercial Fisheries with Recommendations for Restructuring Management Policies

    Comparison of Size Selectivity Between Marine Mammals and Commercial Fisheries with Recommendations for Restructuring Management Policies

    NOAA Technical Memorandum NMFS-AFSC-159 Comparison of Size Selectivity Between Marine Mammals and Commercial Fisheries with Recommendations for Restructuring Management Policies by M. A. Etnier and C. W. Fowler U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Marine Fisheries Service Alaska Fisheries Science Center October 2005 NOAA Technical Memorandum NMFS The National Marine Fisheries Service's Alaska Fisheries Science Center uses the NOAA Technical Memorandum series to issue informal scientific and technical publications when complete formal review and editorial processing are not appropriate or feasible. Documents within this series reflect sound professional work and may be referenced in the formal scientific and technical literature. The NMFS-AFSC Technical Memorandum series of the Alaska Fisheries Science Center continues the NMFS-F/NWC series established in 1970 by the Northwest Fisheries Center. The NMFS-NWFSC series is currently used by the Northwest Fisheries Science Center. This document should be cited as follows: Etnier, M. A., and C. W. Fowler. 2005. Comparison of size selectivity between marine mammals and commercial fisheries with recommendations for restructuring management policies. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-159, 274 p. Reference in this document to trade names does not imply endorsement by the National Marine Fisheries Service, NOAA. NOAA Technical Memorandum NMFS-AFSC-159 Comparison of Size Selectivity Between Marine Mammals and Commercial Fisheries with Recommendations for Restructuring Management Policies by M. A. Etnier and C. W. Fowler Alaska Fisheries Science Center 7600 Sand Point Way N.E. Seattle, WA 98115 www.afsc.noaa.gov U.S. DEPARTMENT OF COMMERCE Carlos M.
  • Cephalopods and Mesoscale Oceanography at the Antarctic Polar Front: Satellite Tracked Predators Locate Pelagic Trophic Interactions

    Cephalopods and Mesoscale Oceanography at the Antarctic Polar Front: Satellite Tracked Predators Locate Pelagic Trophic Interactions

    MARINE ECOLOGY PROGRESS SERIES Published June 6 Vol. 136: 37-50,1996 Mar Ecol Prog Ser Cephalopods and mesoscale oceanography at the Antarctic Polar Front: satellite tracked predators locate pelagic trophic interactions P. G. Rodhouse*, P. A. Prince, P. N. Trathan, E. M. C. Hatfield, J. L. Watkins, D. G. Bone, E. J. Murphy, M. G. White British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 OET, United Kingdom ABSTRACT: Predator data and exploratory fishing in the Scotia Sea have revealed the presence of cephalopod stocks in the Antarctic Polar Frontal Zone (PFZ).This is a vast, remote region where large epipelagic cephalopods aggregate into highly mobde schools making them difficult to locate and sample. We used satellite tagged predators and shipboard acoustics for coarse and fine scale location of cephalopod concentrations, and sampled them with commercial and scientific nets to determine the relationship between cephalopod distribution and mesoscale oceanographic features at the PFZ. Satel- lite tags were attached to 9 grey-headed albatrosses Diomedea chrysostoma, breeding at Bird Island, South Georgia, to monitor foraging at sea in January-March 1994. A foraging area at the PFZ, north of South Georgia, was located, an acoustic survey undertaken and a fixed station established where acoustic targets were found. A net survey was carried out with a commercial pelagic trawl, a rectan- gular midwater trawl 25 mZ (RMT25), a horizontal multiple plankton sampler and a neuston net. Acoustic layers were targeted and the RMT25 sampled 200 m layers to 1000 m in daylight and dark- ness. Cephalopods were sinlultaneously recovered from food samples fed to D chrysostoma chicks at Bird Island.