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Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR Statistical Division 58.5.1)
20 years after the beginning of fish- ery. The first biomass estimates were produced from ... ns ns ns Channichthys rhinoceratus 2.62 1.13 1.19 10.21 0 10 000 20 000 30 000 40 000 50 000 ... area is known. The geographic and bathymetric fish distribu- tions over a 20-year interval ... of the species. The standard duration of a trawl was 30 min on the ground (bottom trawling) and the selected ... Paper Title: Biomass, abundance and distribution of fish in the Kerguelen Islands EEZ (CCAMLR ... conducted from September to October 2006 in the northern part of the Kerguelen Plateau (CCAMLR Statistical ... Division 58.5.1). The swept-area method was used in the depth range from 100 to 1 000 m with 207 random ... , their biomass during the period between the two surveys. In addition to the commercial species ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 1–32 : Author(s): Duhamel, G. and M. Hautecoeur
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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
j . \, /"J~ .\I\r /' \~~ ~, I ~ r /" '~ U I --r I I I I I I (] 10 20 30 ~O 50 60 Length (rnm) 70 Figure 2: The length of frequency distribution of all krill ... WG-KRILL-91/30 ANALYSES OF ACOUSTIC LINE-TRANSECT DATA ... aKycTHlIeCKa5I CbeMKa 3arraCOB 300rrJIaHKTOHa. IIOJIYlIeHHble ,llaHHble aHaJIH3HpOBa- JIHCb C HCrrOJIb30 ... COCTaBHJIa TaKHM 06pa30M 11,7 TOHH KM-2. XOT5I o~eHKa Cpe,llHeti BeJIHlIHHbI He 3aBHCHT OT orrpe ... of zooplankton stocks in the waters around South Georgia was carried out during November and December ... 1981. The data have been analysed using various definitions of strata. The total biomass in the area of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Author(s): Murphy, E., I. Everson and A. Murray
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The utilization of seabird censuses for krill monitoring
, TaKMM 06pa30M, HBMTCH Jl~eKTI1BHbIM cpeACTBOM AnH llonyqeHMH CTaTWCTWqeCKWX KpMTepweB 3HaqWMOCTM ... conditions in two consecutive years. Moreover, other parameters of value to the ecosystem are still less ... of R/V Dr Eduardo L. Holmberg taken together with acoustic records of krill abundance were studied by some ... targets and geographical features for many years. OUr goal should be to translate this fact ... : The possibility of using bird observations made at sea as a means of monitoring krill in the Antarctic ... capable of detecting changes in bird abundance and/or species composition, associated with three levels of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Author(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana
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Environment–krill relations in the South Georgia marine ecosystem
expressed strongly in years of extreme conditions. The correlation with water temperature was more ... expressed strongly in years of extreme conditions. The correlation with water temperature was more ... longitudes 20°, 30°, 40' and 50°W. For the period 1973 to 1989, a further sea-ice dataset was available ... : (a), (b), (c) - in the same year; (d) - ice-edge position at 30°W averaged for December-January and at 30°W in the next June ... 0 80 (a) 0 0 c 70 0 . 5 60 O 8 2 S 5 0 ~ O o 0 W 4 0 - 3 0 r = 0.57 8 30 , 20 ... CCAMLR Science, Vol. 3 (1996): 13-30 ENVIRONMENT-KRILL ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Author(s): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky
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An iterative model to construct an age/length key to assess the age composition of a new fishery for Dissostichus eleginoides in Chilean waters
, que van desde e1 grupo 3 al20. El rango de edades de los machos fluctu6 entre 3 y 16 aiios ... , observandose una mayor frecuencia en los 11 aftos. Por su parte en las hembras, fluctu6 entre los 3 y 20 aiios ... 2,09 16816 1,91 18 14378 1,63 12631 1,44 19 1796 0,20 1760 0,20 20 1058 0,12 1378 0,16 Total ... . ___ Jun. 9.000 6.000 3.000 8 10 12 .4 16 18 20 Edod eOMPOSICION CAPTUAA EDAD ENE- MAR 1992 ... new fishery for Dissostichus eleginoides in Chilean waters Abstract / Description: Traditional ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 11–20 : Author(s): Robotham, V. H. and Z. Young U.
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Options for allocating the precautionary catch limit of krill among small-scale management units in the Scotia Sea
in some of its traditional fishing grounds during years of low krill availability. Under all five options ... years of low krill availability. Under all five options there would be little effect on the existing ... monitoring, the fi shery would be restricted in some of its traditional fi shing grounds during years of low ... distribution throughout the year, or between years. Furthermore, estimates of stand- ing stock do not include ... may change from year to year and that an index may have some predictive value in estimating krill ... dramatically from ca. 500 000 tonnes per year to ca. 100 000 tonnes per year. These data are listed in Table ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 81–97 : Author(s): Hewitt, R.P., G. Watters, P.N. Trathan, J.P. Croxall, M.E. Goebel, D. Ramm, K. Reid, W.Z. Trivelpiece and J.L. Watkins
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Discrimination of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) using otolith morphometrics
80 60 40 20 0 10 20 30 40 50 60 70 Age (years ... years, M. caml takes more than 30 years Table 4: Discriminant analysis results using otolith ... shown on x-axis). 60 50 40 30 20 10 0 N um be r o f fi sh 37 42 47 ... a (m m 2 ) 120 100 80 60 40 20 30 40 50 60 70 80 90 ... fishery in the Ross Sea region is comprised of two species, rather than being solely Macrourus whitsoni ... , was recognised in 2010 with the identification of a new species, M. caml. Grenadier are the main by ... -catch in the toothfish fishery and modelling suggests that they may be subject to predation release as ... the abundance of toothfish reduces. In order to improve information on the spatial distribution, age ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 15–28 : Author(s): Pinkerton, M.H., C. Ó Maolagáin, J. Forman and P. Marriott
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Operational interactions of sperm whales and killer whales with the Patagonian toothfish industrial fishery off southern Chile
le s (in di vi du al s) 0 10 20 30 40 50 60 70 80 90 E ffo rt ( ha ul s ob se ... rv ed ) (a) 0 5 10 15 20 25 30 35 40 45 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec ... Month K ill er w ha le s (in di vi du al s) 0 10 20 30 40 50 60 70 80 90 E ffo rt ... + 173.06 R2 = 0.8552 0 5 10 15 20 25 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 ... eleginoides) fishery operations were assessed in southern Chile during surveys with observers on board ... %. Considering that no interactions were recorded in 153 (84%) of the effectively monitored sets, and that the ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 127–140 : Author(s): Hucke-Gaete, R., C.A. Moreno and J. Arata
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Geographical differences in the condition, reproductive development, sex ratio and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Subarea 88.1)
50 40 30 20 10 0 North South break South shelf North South break South shelf Figure 4: Ratio ... value for all years occurring at about 141 cm TL for males and 152 cm TL for females. Average ... to fishing depths of 900 m or greater, the distribution is similar to the other four years. The frequency ... ). Hanchet et al. (2003) noted values for D. mawsoni suggesting that 50% of Fenaughty 30 ... Paper Title: Geographical differences in the condition, reproductive development, sex ratio and ... study indicate measurable differences in a number of indices from toothfish found on the Ross shelf ... population had a unimodallength distribution at a consistent peak over all sampling seasons in comparison ... with the southern group (in which the distribution was multimodal), showed a consistent and ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 27–45 : Author(s): Fenaughty, J.M
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Is the attempt to estimate the biomass of Antarctic fish from a multi-species survey appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited
. Despite the closure of the fi shery almost 20 years ago, none of these multi-species surveys has ... the potential recovery of the stocks properly in the almost 20 years since the fi shery was closed. Two ... ' –55°0' –54°30' –60°45' –60°50' –60°55' –61°00' –61°05' –61°10' –61°15' –61°20 ... ' –56°0' –55°30' –55°0' –54°30' –60°50' –61°00' –61°10' –61°20 ... appropriate for all targeted species? Notothenia rossii in the Atlantic Ocean sector – revisited Abstract ... / Description: Notothenia rossii was the fi rst target species in Southern Ocean fi sheries. The species was ... already heavily fished at the beginning of the 1970s. The closure of the fishery for this species in 1985 ... violated in the case of N. rossii, which is non-randomly distributed such that a large proportion of the ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 141–153 : Author(s): Kock, K.-H., M. Belchier and C.D. Jones