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  • Weitere Quellen  (8)
  • American Association for the Advancement of Science (AAAS)
  • Canadian Science Publishing
  • 1980-1984  (6)
  • 1965-1969  (2)
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  • 1
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    Helminth parasites of the Newfoundland short-finned squid,Illex illecebrosus illecebrosus(LeSueur) (Cephalopoda: Decapoda) (1968)
    Canadian Science Publishing
    In:  Canadian Journal of Zoology, 46 (5). pp. 1059-1070.
    Details
    Publikationsdatum: 2020-07-24
    Beschreibung: Five genera of cestode parasites were found in the short-finned squid. Representatives of three of these, Pelichnibothrium speciosum, Monticelli, Scolex polymorphus Rudolphi, and Nybelinia sp. are new host records. The other two genera are Phyllobothrium and Dinobothrium, both of which have previously been described from Illex illecebrosus illecebrosus. The specimens of Dinobothrium collected were identified to the species level, Dinobothrium plicitum Linton, for the first time. Contrary to conclusions drawn by other workers, the plerocercoids of Phyllobothrium sp. do not wander freely about the body of the squid in nature, but are restricted to the caecum. The wandering of plerocercoids referred to above is probably a function of rising temperature over the period between time of capture of the squid and time of examination.
    Materialart: Article , PeerReviewed
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  • 2
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    Nautilus Growth and Longevity: Evidence from Marked and Recaptured Animals (1984)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 224 (4652). pp. 990-992.
    Details
    Publikationsdatum: 2019-03-19
    Beschreibung: Study of Nautilus belauensis i its natural habitat in Palau, West Caroline Islands, shows that growth is slow (0.1 millimeter of shell per day on the average) and decreases as maturity is approached and that individuals may live at least 4 years beyond maturity. Age estimates for seven animals marked and recaptured between 45 and 355 days after release range from 14.5 to 17.2 years. These data indicate that the life-span of Nautilus may exceed 20 years and that its life strategy is very different from that of other living cephalopods.
    Materialart: Article , PeerReviewed
    Format: text
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  • 3
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    Calcium Carbonate Hexahydrate from Organic-Rich Sediments of the Antarctic Shelf: Precursors of Glendonites (1982)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 216 (4550). pp. 1128-1131.
    Details
    Publikationsdatum: 2018-03-08
    Beschreibung: Large euhedral crystals of calcium carbonate hexahydrate were recovered from a shelf basin of the Bransfield Strait, Antarctic Peninsula, at a water depth of 1950 meters and sub-zero bottom water temperatures. The chemistry, mineralogy, and stable isotope composition of this hydrated calcium carbonate phase, its environment of formation, and its mode of precipitation confirm the properties variously attributed to hypothetical precursors of the glendonites and thereby greatly expand their use in paleoceanographic interpretation.
    Materialart: Article , PeerReviewed
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  • 4
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    Detection of Overflow Events in the Shag Rocks Passage, Scotia Ridge (1981)
    American Association for the Advancement of Science (AAAS)
    In:  Science, 213 (4512). pp. 1113-1114.
    Details
    Publikationsdatum: 2019-01-21
    Beschreibung: During an almost yearlong period of observations made with a current meter in the fracture zone between the Falkland Islands (Islas Malvinas) and South Georgia, several overflow events were recorded at a depth of 3000 meters carrying cold bottom water from the Scotia Sea into the Argentine Basin. The outflow bursts of Scotia Sea bottom water, a mixing product of Weddell Sea and eastern Pacific bottom water, were associated with typical speeds of more than 28 centimeters per second toward the northwest and characteristic temperatures below 0.6°C. The maximum 24-hour average speed of 65 centimeters per second, together with a temperature of 0.29°C, was encountered on 14 November 1980 at a water depth of 2973 meters, 35 meters above the sea floor.
    Materialart: Article , PeerReviewed
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  • 5
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    Growth and Gonadal Development in Triploid Landlocked Atlantic Salmon (Salmo salar) (1984)
    Canadian Science Publishing
    In:  Canadian Journal of Fisheries and Aquatic Sciences, 41 (9). pp. 1387-1392.
    Details
    Publikationsdatum: 2019-09-13
    Beschreibung: There was no difference in weight between diploid and triploid landlocked Atlantic salmon (Salmo saiar) measured over a 9-mo period, but triploids were consistently longer (FL) and thus had a lower condition factor than diploids. The gonadosomatic index (GSI) of triploid females was only 7.7% that of diploid females, while the GSI of triploid males was 52% that of diploid males. Triploid ovaries had the external appearance of undeveloped gonads, but every triploid female did in fact produce a small number of oocytes (from 1 to 12, versus several hundred oocytes in each diploid female). Triploid testes were well developed but contained few spermatids and no spermatozoa. Diploid testes, on the other hand, were in advanced stages of spermiogenesis. None of the triploid males reached spermiation.
    Materialart: Article , PeerReviewed
    Format: text
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  • 6
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    Taxonomic revision of Nodularia (Cyanophyceae/Cyanobacteria) (1980)
    Canadian Science Publishing
    In:  Canadian Journal of Botany, 58 (11). pp. 1211-1224.
    Details
    Publikationsdatum: 2019-09-17
    Beschreibung: Nodularia Mertens ex Bornet & Flahault originally established in 1822, has had a total of 28 taxa described. It is restricted in distribution primarily to brackish coastal waters and inland lakes and ponds. In British Columbia (Canada) these lakes and ponds have extreme ranges of salinity (4–400‰) and temperature (0–35 °C). Laboratory studies of 16 isolates indicated maximum growth at 5–10‰, salinity (range 1–60‰), 25–30 °C, pH 10.0–10.5 (range 7.0–10.5) at light intensity of 6000 lx. No preference was shown for dominant anions (Na+, Mg2+) or cations (Cl−, CO32−, S42−). Sheath and akinete characteristics were variable, whereas vegetative cell shape, heterocyst location, and akinete formation were more stable. Investigation of field-collected material, laboratory-grown cultures, and study of herbarium specimens indicate that all the described taxa belong to either N. harveyana [Thwaites] Thuret ex Bornet & Flahault 1886 or N. spumigena Mertens ex Bornet & Flahault 1886. The latter is named the syntype and lectotype material is designated.
    Materialart: Article , PeerReviewed
    Format: text
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  • 7
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    Relations between length of the pen and other measurements in the squid Lolliguncula brevis (1969)
    Canadian Science Publishing
    In:  Journal of the Fisheries Research Board of Canada, 26 (6). pp. 1676-1679.
    Details
    Publikationsdatum: 2021-06-17
    Beschreibung: The relations between length of the pen and other measurements in the squid Lolliguncula brevis were studied to estimate the volume of partially digested squid recovered from tuna stomachs. Relations between the pen length and mantle length and between pen length and volume were analyzed by regression. Conversion tables were constructed on the basis of these analyses to estimate the original volume of the squid from the length of the pen.
    Materialart: Article , PeerReviewed
    Format: text
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  • 8
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    Canadian west coast flying squid experimental fishery (1981)
    Canadian Science Publishing
    In:  Canadian Industry Report of Fisheries & Aquatic Sciences, 122 . iii-6.
    Details
    Publikationsdatum: 2020-11-16
    Beschreibung: Bernard, F. 1981. Canadian west coast flying squid experimental fishery. Can. Ind. Re. Fish. Aquat. Sci. 122: 23p. This report covers the experimental drift net fishery for the flying squid Ommastrephes bartramii (Lesuer) on the high seas off the west coast of Vancouver Island in the summer of 1980. Ctaches were commercial, but development of a fishery is not imminent because of a lack of suitable large vesels and shore-based processing facilities. Further constraints are the large amount of manpower required to run gear and process catch and the volatile prices and deman for squid.
    Materialart: Article , PeerReviewed
    Format: text
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