Resultados de la búsqueda
-
Midwater trawl catchability as an aspect of a quantitative assessment of krill biomass conducted using a trawl census survey
Paper Title: Midwater trawl catchability as an aspect of a quantitative assessment of krill ... variable which depends on both the behavioural and distributional characteristics of the target species and ... trawl parameters. Reliability of biomass assessments will improve with better knowledge of trawl ... catchability and krill distribution patterns. A comparative analysis of trawl catchability for commercial ... , specific biomass (density) of krill in the catch is expressed in g/m2 or g/m3 at the point of trawling ... each haul. At some trawl stations the coefficient of variation of catchability (Kp) reached 3.50. Mean ... OF A QUANTIT ATIVE ASSESSMENT OF KRILL BIOMASS CONDUCTED USING A TRAWL CENSUS SURVEY S.M ... distributional characteristics of the target species and trawl parameters. Reliability of biomass assessments ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 257–272 : Autor(es): Kasatkina, S.M.
-
Revised estimates of the area of the South Georgia and Shag Rocks shelf (CCAMLR Subarea 48.3)
Paper Title: Revised estimates of the area of the South Georgia and Shag Rocks shelf (CCAMLR ... variety of primary sources including multi-beam swath bathymetry. Sea floor area (km 2 <500 m depth ... , the reliability of existing sea floor area estimates was found to vary spatially and between different ... should be used for future assessments and for assisting with the stratification of surveys. File ... raster dataset sampled at ⅛ of a degree and the other data as point files. The swath data were further ... intervals (to 500 m) in Table 1. Total area of sea floor between 0–500 m at South Georgia and Shag Rocks ... (Subarea 48.3) was calculated at 44 018 km2. Data were compared with estimates of sea floor area obtained ... types and accurately map the interaction of fisheries with sea floor topography at South Georgia ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 167–175 : Autor(es): Belchier, M. and P. Fretwell
-
Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008
Paper Title: Annual changes in species composition and abundance of myctophid fish in the north ... of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008 Abstract ... / Description: Species composition and abundance of myctophid fish were analysed using the fish by-catch ... north and northwest of South Georgia, Antarctica, during austral winters from 2002 to 2008. A total of ... opening of ca. 30 m was used throughout the survey. Inner meshes of the net were ca. 15 mm at the codend ... the occurrence of P. choriodon from the diet of Antarctic fur seals at South Georgia in austral ... 1: O cc ur re nc e of m yc to ph id s pe ci es in b y- ca tc h. R at e of o ... . 1997. Diet of the king penguin Aptenodytes patagonicus during three summers at South Georgia. Ibis ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Autor(es): Iwami, T., M. Naganobu, K. Taki and M. Kiyota
-
Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the number of concentrations and analytical justification for search data
Paper Title: Analysis and modelling of the Soviet Southern Ocean krill fleet, II: Estimating the ... number of concentrations and analytical justification for search data Abstract / Description: In this ... of concentrations of krill (Butterworth, 1988; Mangel, 1988) in a given region of the Southern Ocean ... make accurate inferences. In the appendix, a method for correcting for the bias in the detection of ... fisheries data. At the meeting of the Scientific Committee for the Conservation of Antarctic Marine ... pertinent information for these analyses are: ( i) vessel location at the start of trawling; (ii) time of ... others it is not clear at all. In addition, Figure 15 provides an excellent example of why echo sounder ... survey vessel sits at the center of this interval with detection width 2s. Let C denote the location of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 283–322 : Autor(es): Mangel, M.
-
Catch per unit effort (CPUE) data from the early years of commercail krill fishing operations in the Atlantic sector of the Antarctic
Paper Title: Catch per unit effort (CPUE) data from the early years of commercail krill fishing ... operations in the Atlantic sector of the Antarctic Abstract / Description: Catch per unit effort (CPUE) data ... differ between subareas, years and shelf/oceanic regions. Obviously, a consistent pattern of CPUE values ... 1980/81, whereas the lowest CPUE occurred in Subarea 48.3 in 1977/78. The validity of the CPUE index is ... difference at all between the CPUEs of the various subareas. There is obviously no tendency for any subarea ... . Reproduction performance of seabirds and seals at South Georgia and Signy Island, South Orkney Islands, 1976 ... EFFORT (CPUE) DATA FROM THE EARLY YEARS OF COMMERCIAL KRILL FISHING OPERATIONS IN THE ATLANTIC SECTOR ... OF THE ANTARCTIC V. Siege1 and U. Damm Bundesforschungsanstalt fur Fischerei Institut fur ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 31–50 : Autor(es): Siegel, V., V. Sushin and U. Damm
-
Preliminary results of research activities of RV Evrika in the Scotia Sea in January-March 1988
Paper Title: Preliminary results of research activities of RV Evrika in the Scotia Sea in January ... -March 1988 Abstract / Description: In 1987/88 a multi-disciplinary survey was conducted of the Scotia ... South Georgia in particular were surveyed twice. Research activities are part of the program implemented ... in areas of the Atlantic Sector of the Southern Ocean identified for monitoring by CCAMLR. During the ... SC-CAMLR-VII/8G/15 PRELIMINARY RESULTS OF RESEARCH ... ACTIVITIES OF RV EVRIKA IN THE SCOTIA SEA IN JANUARY-MARCH 1988 L.1. Maklygin , A.S. Fedorov, V.N. Shnar ... -disciplinary survey was conducted of the Scotia Sea and adjacent waters, accompanied by regular trawlings with ... activities are part of the program implemented in areas of the Atlantic Sector of the Southern Ocean ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 215-229 : Autor(es): Maklygin, L.I., A.S. Fedorov, V.N. Shnar, Yu.A. Shulyakovsky, I.V. Krasovsky, Yu.D. Shuvaev and A.V. Kromsky
-
Size and density of krill layers fished by a Japanese trawler in the waters north of Livingston Island in January 1988
Paper Title: Size and density of krill layers fished by a Japanese trawler in the waters north of ... Livingston Island in January 1988 Abstract / Description: The size and density of fishable krill layers in ... the northern waters of Livingston Island were determined during the co-operative survey carried out by ... RV Kaiyo Maru and a Japanese trawler. The mean values of layer length, thickness and surface density ... aggregation was measured at its densest part every five minutes on the echogram. The density of each layer ... not fish the deeper parts of the layers in at least 16 out of 34 hauls. Catch per tow ranged from ... of the concentration proved to be more than 52 km (from 60 0 to 61 0 W at 62°S). REFERENCES ... WG-KRILL-89/6 SIZE AND DENSITY OF KRILL LAYERS FISHED ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 339–345 : Autor(es): Endo, Y. and Y. Shimadzu
-
Results of fish larvae sampling by means of fine-meshed samplers attached to a bottom trawl
Paper Title: Results of fish larvae sampling by means of fine-meshed samplers attached to a ... bottom trawl Abstract / Description: Fine-meshed samplers were attached to the top of a bottom trawl in ... order to provide information on the composition, distribution and abundance of Antarctic fish larvae in ... the near-bottom zone, which is usually not sampled using plankton nets. The efficiency of various ... results for three different mesh sizes is given in Table 1. At the beginning of the bottom survey ... in sampling than the 0.505 mm net. For example, the total number of larvae caught at station 36 ... Piscatoria 10 (1): 25-44. NORTH, A.W. 1987. Distribution of fish larvae at South Georgia horizontal ... WG-FSA-88/20 RESULTS OF FISH LARVAE SAMPLING BY MEANS ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 69-86 : Autor(es): Ślósarczyk, W. and I. Wójcik
-
Joint Polish/American hydroacoustic survey of Elephant Island and the vicinity of King George Island, 1988
Paper Title: Joint Polish/American hydroacoustic survey of Elephant Island and the vicinity of ... in most areas covered by last year’s survey. The total biomass in the vicinity of Elephant Island was ... estimated from 120 kHz data to be 260k tonnes and that in the Bransfield Strait south of King George Island ... was 39k tonnes for a total of 299k tonnes in the combined areas. The estimated 200 kHz survey data ... miles and R M T -8 hauls taken at several locations for length-frequency of ensonified populations ... consisted of a BIOSONICS Inc. Model 101 sounder operating at 200 kHz and coupled to a Hewlett Packard A900 ... computer for real-time digital integration of the data. A BIOSONICS Inc. Model 101 sounder operating at 50 ... SURVEY OF ELEPHANT ISLAND AND THE VICINITY OF KING GEORGE ISLAND, 1988 M.C. Macaulay Abstract The ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 357–377 : Autor(es): Macaulay, M.C.
-
Homogeneity of body length composition of Antarctic krill within the commercial zone
Paper Title: Homogeneity of body length composition of Antarctic krill within the commercial zone ... Abstract / Description: The homogeneity of krill (Euphausia superba) length composition in commercial ... trawl catches (hauls) was investigated by comparing length compositions from different parts of the same ... haul. There was no significant difference (P >0.5) in 53 out of 60 hauls. Therefore it is concluded ... WG-KRILL-90/ll REV.l HOMOGENEITY OF BODY LENGTH ... COMPOSITION OF ANTARCTIC KRILL WITHIN THE COMMERCIAL ZONE T.Ichii* Abstract The homogeneity of krill ... length compositions from different parts of the same haul. There was no significant difference (P>O.OS ... ) in 53 out of 60 hauls. Therefore it is concluded that sampling from one part of the haul provides a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 17–28 : Autor(es): Ichii, T.