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Nautical twilight calculator
time in the morning and evening when the centre of the Sun is 12° below the horizon. At high latitudes ... 12° below the horizon for a period in winter. This calculator provides the times of nautical twilight ... at a user-defined position, for today and at fortnightly intervals during a selected calendar year ... . The times of sunrise and sunset are included, and all times are adjusted to reflect the UTC offset of ...
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Otolith microstructure of juvenile fish, the first annulus radius and pelagic stage duration of icefish Champsocephalus gunnari (Channichthyidae) in the South Georgia area
in the first 100 days of fish life was 6?k at fish length of 4 cm. By the 200th day the daily growth ... – 3.1?k at fish length of up to 11.8 cm, by the 500th day – 2.8?k at fish length of up to 12.5 cm. The ... Abstract: On the basis of the results of the trawl-acoustic survey in February-March 2002, the ... microstructure analysis of otoliths of juvenile icefish of 5.5-13.3 cm in length was carried out. Fish studied ...
Meeting Document : WG-FSA-03/75 Rev. 1 : Author(s): L.V. Shcherbich (Russia)
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Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999
Paper Title: Distribution and size of Antarctic krill (Euphausia superba Dana) in Polish ... commercial catches taken in the Atlantic sector of the Southern Ocean from 1997 to 1999 Abstract ... / Description: The distribution and internal structure of commercial krill concentrations were investigated in ... the areas of the South Shetland, Elephant, South Georgia and South Orkney Islands in the spring and ... aggregations at different times of day and night in the South Georgia area. Shevtsov and Makarov (1969) have ... used in order to determine the dura- tion of each haul. The beginning of trawling was the time at ... which shooting was completed and the net began to fi sh. The end of trawling was the time at which ... Distribution and size of krill in Polish commercial catches, 1997–1999 to 249 m) than at night (up to 149 m ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 83–105 : Author(s): Jackowski, E
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Further analysis of spatial patterns of benthic invertebrate habitats from fishery bycatch in the Ross Sea region
evidence of VME taxa. Identifiable sponge and/or gorgonian habitats occurred at a typical scale of 10-30 km ... , but were at larger scales. Spatial analysis of these data allows the detectability of prevalent taxa ... to be estimated, along with changes in catch rate at different levels of observed bycatch. Results ... Abstract: High resolution VME taxa bycatch data (at the longline segment level) have been ...
Meeting Document : WG-FSA-10/30 : Author(s): S.J. Parker, R.G. Cole and S.M. Hanchet (New Zealand)
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Effect of a shore-based sampling program on Notothenia coriiceps populations
summers of 1992/93 to 1994/95 at one specific zone (site 1) with those taken in the same last summer at ... started in site 1. Present results show that the size variations of N. coriiceps observed at Potter Cove ... Abstract: The effect of an intensive sampling programme on an inshore population of Notothenia ... coriiceps was studied at Potter Cove, South Shetland Islands, by comparing catch data taken in successive ...
Meeting Document : WG-FSA-99/24 : Author(s): R. Casaux and E. Barrera-Oro (Argentina)
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Spatial distribution of predator/prey interactions in the Scotia Sea: implications for measuring predator/fisheries overlap
scales and arrives at contradictory conclusions. At-sea data from observations of krill predators during ... -linear decline. Krill fisheries operated at a scale of 150 km and almost all of this operation took place ... should be assessed at scales of 70- 100 km to accommodate the scales of operation of the predators ... Abstract: The measurement of spatial overlap between predators and fisheries exploiting a common ...
Meeting Document : WG-EMM-02/14 : Author(s): K. Reid, M. Sims, R.W. White and K.W. Gillon (United Kingdom)
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Data on reproduction biology of Dissostichus mawsoni from the Ross Sea (Statistical Subarea 88.1)
Abstract: Macroscopic data of the field research obtained during fishing trips on board Spanish ... Macroscopic data of the field research obtained during fishing trips on board Spanish longliner ...
Meeting Document : WG-FSA-11/04 : Author(s): A.K. Zaytsev (Russia)
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Seabird interactions with trawl and longline fisheries for Dissostichus eleginoides and Champsocephalus gunnari
, probably because the birds at the former site are distracted from the longlines by the discharge of offal ... and Champsocephalus gunnari Abstract / Description: The behaviour of seabirds and the rate of ... . eleginoides and trawling for mackerel icefish (Champsocephalus gunnari) were also observed at Kerguelen. Many ... -chinned petrels (Procellaria aequinoctialis) were common only at Kerguelen. Bird mortality during trawling ... trawler Austral Leader. This was fishing for D. eleginoides 3 to 5 n miles to the west of the island at ... trawling at either location, even though the species composition of birds following the ships, and in ... low figure. Most of this mortality was observed on the one vessel with a netsonde cable where at ... , the impact of this mortality is tempered by the size of the population at Kerguelen (100 000 to 300 ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 93–99 : Author(s): Williams, R. and D. Capdeville
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Evidence of two stocks of Champsocephalus gunnari in the South Georgia region, CCAMLR fishing Area 48.3
Abstract: In 1991, the 0 age-class of C. gunnari were sampled at Shag Rocks on 18 January, off ... between to 19 January to 19 February. The size- frequency of fish at Shag Rocks contained two modes of 31 ... combined samples off the coast of South Georgia were 24-63mm SL. The mean and median sizes of the fish at ... and those at South Georgia must be the result of different spawning seasons and/or egg development ...
Meeting Document : WG-FSA-94/16 : Author(s): A.W. North (United Kingdom)
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DOWN-SCALING FOOSA TO MODEL THE ADMIRALTY BAY PYGOSCELID PENGUIN COLONIES: A WORK IN PROGRESS
Abstract: We apply Foosa at the scale of interactions among the 3 breeding penguin colonies ... -off between per-capita productivity at low adult abundance and the sensitivity of juvenile survival to ... hypothesis testing to make strong inference about the dominant drivers of the penguins at Admiralty Bay ... , krill, and environmental variability at the long-term research site in Admiralty Bay, King George Island ...
Meeting Document : WG-EMM-08/51 : Author(s): J.T. Hinke, G.M. Watters and W.Z. Trivelpiece (USA)