Résultats de la recherche
-
Characteristics of krill aggregations in the South Sandwich Islands subarea in January–February 2000
biomass is shown. About 64% of the krill biomass was concentrated in krill swarms in the upper 80 m depth ... 20 00 19 83 19 90 Po te nt ia l F is hi ng G ro un d s (J an ua ry ... horizontal density (over 20 g m-2) was related to krill swarm concentrations within the 15–80 m depth layer ... be r 19 84 Ja nu ar y 19 85 M ea n d ep th r an ge (m ) 70 80 80 50 62 44 .0 ... with densities greater than 20 g m-2, formed by swarm fi elds distributed within the 0–80 m layer ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 145–164 : Auteur(s): Kasatkina, S.M., A.P. Malyshko, V.N. Shnar and O.A. Berezhinsky
-
Analysis of results from demersal fish surveys at South Georgia, undertaken by the United Kingdom and the USSR, January and February 1990
these large hauls were considered in the analysis. No ideal method was found for incorporating the large ... series. All hauls were intended to last for 30 minutes at a speed of 3 to 3.5 knots. Hauls were ... mentioned above and it was concluded that they were responsible for the major difference between the ... .... 18 Remainder of South Georgia 150 to 250 m stratum 190623 (N=12) 18271 (N=20) Total biomass for ... (30) 0 0 D. eleginoides 335 (39) 3020* (33) 9631 (55) 1693 (21) P.b. guntheri 0 0 13 608 (90) 1918 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 223–254 : Auteur(s): (Report of a Joint UK/USSR Workshop, 23 to 27 July 1990)
-
Preliminary assessment of mackerel icefish (Champsocephalus gunnari) in the vicinity of Heard Island and McDonald Islands (Division 58.5.2), based on a survey in March–April 2010, including a revised growth model
58.5.2 in the vicinity of Heard Island in March-April 2010 to provide the information for an assessment ... assessment of yield for the area of Division 58.5.2 to the west of 79°20’ E using standard CCAMLR methods ... . The strong year class detected in the last three years’ surveys is now fully recruited as the 4 ... focus on this cohort. A new growth model is also estimated which shows an improved fit to observed sizes ...
Meeting Document : WG-FSA-10/12 : Auteur(s): D.C. Welsford (Australia)
-
Status of the krill stock around Elephant Island in 1991/92 and 1992/93
. The length frequency distributions and maturity stage composition reflected relatively good year class ... success from the 1990/91 spawning season but poor success from 1991/92. Year class success from these and ... appeared to be affected by dense salp concentrations during 1992/93 and 1989/90. File: 02loeb-siegel.pdf ... austral summers of 1991/92 and 1992/93 are described and compared with information from previous years ... . Loeb and Siege1 (Dlink/Dmax) *l00 Variable 1---10---20---30---40---50---60---70---80---90---~00 ST ... . Frequency % 12 "l l0 l6 20 26 30 36 40 46 60 66 80 Total Length (mm) Frequency % 10 16 90 26 SO S6 ... maturity development during early summer is an important factor influencing year class success, due to ... recruitment for the 1991/92 year class. The apparent failure of the 1991/92 year class supports this ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 7–33 : Auteur(s): Loeb, V. and V. Siegel
-
Cetaceans as indicators of historical and current changes in the East Antarctica ecosystem
approximately 1940 and 1970. A low age at sexual maturity favored an increase in the recruitment rate and total ... Antarctic minke whales could have decreased in recent years. Decrease in availability of krill for this ... middle of the past century and the recovery of krill-eater large whales since the 1980’s. There was an ... whale, which had not been exploited on a large scale. A review of the scientific information in East ...
Meeting Document : WG-EMM-16/64 : Auteur(s): Y. Fujise and L.A. Pastene
-
WG-FSA-91
fish stock assessment survey bottom trawl for South Georgia G. Parkes (United Kingdom) WG-FSA-91/17 Age ... /Germany WG-FSA-91/18 Age/length key for Champsocephalus gunnari from South Georgia; Hill Cove survey ... documents Doc Number Title WG-FSA-91/01 Provisional and Annotated Provisional Agenda for the 1991 meeting of ... Stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for ...
Meeting
-
Precision of growth band determination from eyestalk sections of Antarctic krill (Euphausia superba) preserved in formalin
Abstract: Age information for commercial fish species is crucial to fishery management. Age ... Antarctic krill growth. This study presents important information for age determination, particularly for ... information for Antarctic krill (Euphausia superba) will be important for stock assessment modeling and future ... feedback management of krill fisheries. Samples stored in 70% ethanol provide an opportunity to detect the ...
Meeting Document : WG-EMM-18/P16 : Auteur(s): G.P. Zhu, Y. Yang, Q. Song and H.T. Zhang
-
2013 Report on bottom fisheries and vulnerable marine ecosystems
- 10/20 – see paragraphs 39 to 42 for a worked example). This code can be used to translate gear ... characterising other non-standard scenarios particular to these methods. An impact assessment for trawl gears is ... been developed, and an impact assessment was not completed for these methods. Instead, spatial effort ... index (SC-CAMLR-XXIX, Annex 4, paragraph 4.19) for trawls would yield an impact estimate distribution ...
Document : Site Section: Publications
-
Changes in biomass of eight species of finfish around the South Orkney Islands (Subarea 48.2) from three bottom trawl surveys
the South Orkney Islands (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989 ... /90. The biomass of several species of finfish has been monitored through scientific bottom trawl ... were computed for the eight species of finfish which were most abundant in catches. Biomass levels and ... of recovery for N. rossii. However, overall levels of biomass indicate very little potential for ... conducted during daylight hours. The target time for a haul was 30 minutes, with any haul less than 20 ... Orkney Islands (Subarea 48.2) suffered substantial declines from split-year 1977/78 to 1989/90. The ... increase in point estimate biomass levels for this species suggests an increase in population levels from ... there was an apparent decrease in biomass for all other species in 1999, particularly C. gunnari. The ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 53–74 : Auteur(s): Jones, C.D., K.-H. Kock and E. Balguerías
-
e-cc-xvi.pdf
... should occur in the year 2000 and that an allowance for this would need to be made in the 1998/99 budget ... Statements for 1996 and 1997......................... 3 Review of Budget for 1998 ... . Bock (Germany). 1.2 In opening the meeting, the Chairman said it was an honour for Germany to hold the ... faced this year. He believed that it was necessary for the Commission to resolve this problem in order
application/pdf attached to:CCAMLR-XVIMeeting Report : CCAMLR-XVI