Search results
-
Krill (Euphausia superba) distribution in relation to water movement and phytoplankton distribution off the northern South Shetland Islands
after extraction with 90% acetone (Strickland and Parsons, 1972). 2.2 Hydroacoustic Studies ... and King George Island, and was trapped by erratic oceanic eddies to the east of Elephant Island ... moved east, then reversed and was trapped in Barclay Bay on the northern side of Livingston Island ... trips of fur seals rather long (5 to 9 days compared to 1 to 3 days later in the season) (AMLR, 1991 ... 1990/91 a survey was conducted by RV Kaiyo Maru in the vicinity of the South Shetland Islands and ... Elephant Island. The main objective of the survey was to investigate the mechanisms responsible for the ... concentration of krill and to estimate krill biomass in the area surveyed. Krill biomass estimation was done by ... means of hydroacoustics. Phytoplankton distribution was assessed by measuring surface concentrations of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 123–140 : Author(s): Ichii, T., H. Ishii and M. Naganobu
-
Interaction of marine mammals with the longline fishery around the Kerguelen Islands (Division 58.5.1) during the 1995/96 cruise
). These seals are responsible for the loss of 0.75 % of toothfish during the longline sets in which interaction ... with the Antarctic fur seal (Arctocephalus gazella). These seals are responsible for the loss of 0.75 % of toothfish ... occurred with the Antarctic fur seal (Auctocephalus gazella). These seals are responsible for the loss ... . Fish loss caused by fur seals seems to be insignificant (0.75%) in the Kerguelen area, and is lower ... ; T-test, f = 3.08, p < 0.05). Cherel et al. (1996) observed a 3.6% fish loss on the same vessel where ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 171–174 : Author(s): Capdeville, D
-
Phytoplankton distribution in the mixed layer: implication to krill abundance
dissipative effects are strong (Tennekes and Lumley, 1972, p 68), the scale has a direct implication ... . Random dispersal in theoretical population. Biometrika 38: 196-218. TENNEKES, Hand J.L. LUMLEY. 1972 ... and dotted lines are KD. Three different N are used. The top of each line is N=O.001. The middle is N=O.OS ... Abstract / Description: A one dimensional Lagrangian model of random walk is presented to study the ... distribution of phytoplankton in the Antarctic Ocean. Since little is known about mixed layer dynamics in the ... Antarctic Ocean, we estimate the depth of the mixed layer and its turbulence intensity from an Ekman layer ... . However, the effect on the dynamics is vital, affecting the distribution of particles in the upper ocean ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 331–356 : Author(s): Yamazaki, H. and T.R. Osborn
-
CCAMLR ecosystem monitoring and a feedback management procedure for krill
be attributable to loss of prey through fishing activities. The principal fishery in the CCAMLR Convention Area ... be attributable to loss of prey through fishing activities. The principal fishery in the CCAMLR Convention Area ... performance (e.g., reproductive performance) that may be attributable to loss of prey through fishing ... performance (e.g., reproductive performance) that may be attributable to loss of prey through fishing ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 345–350 : Author(s): Constable, A.J.
-
Sources of variance in studies of krill population genetics
research did not identify dis- tinct populations of Antarctic krill (Fevolden, 1988; Fevolden ... and even truly holoplanktonic organisms can dis- play genetic heterogeneity between populations (Ayoama et ... to be quasi- permanent, large-scale concentrations of krill (Lubimova et al., 1985; Mackintosh, 1972, 1973 ... of Antarctic waters. Polar Biol., 6: 233–236. Mackintosh, N.A. 1972. Life cycle of Antarctic krill ... Paper Title: Sources of variance in studies of krill population genetics Abstract / Description ... : There has been a long-term interest in the population genetics of Antarctic krill species because of ... their ecological and economic importance. The possibility that there are distinct genetic stocks of ... these species would affect the design of management strategies for their conservation. A recent ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 107–116 : Author(s): Jarman, S.N. and S. Nicol
-
Patterns and processes in the distribution and dynamics of Antarctic krill
spatially variable growth rates of krill, krill loss rates due to predators, and density-dependent ... spatially variable growth rates of krill, krill loss rates due to predators, and density-dependent ... variable growth rates of krill, krill loss rates due to predators, and density-dependent attraction ... summer 1981; the middle panels in Figure 2 indicate strong coherence in the distributions. Weber et al ... availability; 2. Krill loss rates are functions of predator abundance; 3. On broad scales, the assumption ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 281–299 : Author(s): Levin, S.A., A. Morin and T.M. Powell
-
Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish
. The mortality resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea ... resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea 88.2 ... , vessel and SSRU. The spatial dis- tribution of the number of sets with positive hook loss and the number ... 2 0. 04 7 Ta bl e 5: R ep or te d ho ok lo ss ra te b y in di vi du al v es se ls ... t yp e ea ch v es se l fis he d. ‘ na ’ de no te s th at t he v es se l di ... the loss of sections of bottom longline gear in the Ross Sea region and Subarea 88.2 Antarc- tic toothfish ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Author(s): Webber, D.N. and S.J. Parker
-
Distribution of fish larvae at South Georgia: horizontal, vertical, and temporal distribution and early life history relevant to monitoring year-class strength and recruitment
near the coast, but rare in oceanic waters. During winter in the 265 m deep fiord of Cumberland East ... near the coast, but rare in oceanic waters. During winter in the 265 m deep fiord of Cumberland East ... mostly beyond the shelf but also over the shelf near the middle of the north-east coast of South Georgia ... , but rare in oceanic waters. During winter in the 265 m deep fiord of Cumberland East Bay the early stages ... oceanicas. Durante el invierno, en el fiordo de 265 m de profundidad de la bahia de Cumberland East, las ... a study in the fiord of CUmberland East Bay during 20 September to 5 october, 1983, approximately one ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 105-141 : Author(s): North, A.W.
-
A potential feedback approach to ecosystem-based management: Model Predictive Control of the Antarctic krill fishery
feedback management as an approach that ‘will use decision rules to adjust selected activities (dis ... 7 and dis- cussed in ‘Results’. State estimation In living resource management in general, and EBM ... the equations of Constable (2001), and harvesting and movement are represented with additive loss or gain ... ) and estimation theory (e.g. Luenberger, 1966; Kwakernaak and Sivan, 1972) have given con- siderable attention ... Control of the Antarctic krill fishery Abstract / Description: CCAMLR aims to develop a feedback approach ... to aid ecosystem-based management (EBM) of Antarctic krill fisheries. It is important to assess ... and uncertain conditions typical of Antarctic marine ecosystems. This study used Model Predictive ... spatially resolved annual catch limits in response to estimates of the state of the system. It suggests that ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 119–137 : Author(s): Hill, S.L. and M. Cannon
-
Factors affecting the incidental mortality of seabirds in the Dissostichus eleginoides fishery in the southwest Atlantic (Subarea 48.3, 1995 season)
fishing trips, as indicated in Tables 1 and 3. Thus, 14 fishing trips (87.5%) out of a total of 17 trips ... in this paper. Data on incidental mortality from the Korean vessel Ihn Sung 66, which made two trips during ... Isla Sofia Magallanes III Isla lsabel Total Trip 1 Trip 2 Species M . giganteus ... XXlIl Mar del Sur Arbumasa XX Total Trip 1 Trip 2 0 3 15 ... Paper Title: Factors affecting the incidental mortality of seabirds in the Dissostichus ... analyses all incidental mortality of seabirds recorded on Argentinian and Chilean vessels fishing for ... possible to evaluate almost all of the incidental mortality of seabirds observed during the season. The ... total mortality recorded was 1 428 birds of which white-chimed petrels (Procellaria aequinoctialis ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 79–91 : Author(s): Moreno, C.A., P.S. Rubilar, E. Marschoff and L. Benzaquen