Search results
-
A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3
distributions of IUU trip length. Estimates of p derived from these runs (i.e. for sightings in 1998, 1999 ... to be shorter than licensed cruises. Licensed vessels are usually able to oper- ate in Subarea 48.3 for two ... ’ and ‘unseen’ IUU fishing by using a simulation model to arrive at statistically rigorous estimates of ... Paper Title: A statistical method for estimating the level of IUU fishing: application to CCAMLR ... , unregulated and unreported (IUU) catches of fish and by-catch of birds. It utilises high quality, well ... -documented fisheries protection vessel (FPV) cruise data. The method takes explicit account of both ‘seen ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Author(s): Agnew, D.J. and G.P. Kirkwood
-
Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia
packages) maybe obtained from the author on request. Data For data and parameters (for growth ... population numbers-at-length. A comparison of this method and the existing age-based CMIX/GYM methodology ... Paper Title: Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South ... model (GYM) packages, which derives population numbers-at-age and projects these numbers forward under ... accurate identification of age cohorts from the survey data. In this paper a length-based approach is ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Author(s): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew
-
Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity
adults during short foraging trips could exist at different locations on Marion Island ... Paper Title: Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion ... debris found in association with seabirds at sub-Antarctic Marion Island for the period May 1996 to April ... and the 1997/98 field seasons. Fishing gear increased at a rate 10 times higher than 'other' ... been found in association with seabird nests at Marion Island. Fishery-related marine debris was found ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Author(s): Nel, D.C. and J.L. Nel
-
Toothfish, Dissostichus eleginoides, at South Georgia
longliner in January 1990 indicates that the fish are sexually mature and, at the time of sampling, are ... Paper Title: Toothfish, Dissostichus eleginoides, at South Georgia Abstract / Description: The ... Dissostichus eleginoides fishery at South Georgia has expanded greatly in recent years. It has been claimed ... , paragraph 106). Histological examination of the gonads of a small sample of fish taken from a commercial ... indicates that the fish are sexually mature and, at the time of sampling, are approaching spawning ... WG-FSA-90n TOOTHFISH, DlSSOSTICHUS ELEGINOIDES, AT ... SOUTH GEORGIA I. Everson and S. Campbell* Abstract The Dissostichus eleginoides fishery at South ... examination of the gonads of a small sample of fish taken from a commerciallongliner in January 1990 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 255–261 : Author(s): Everson, I. and S. Campbell
-
Significant intra-annual variability in krill distribution and abundance at South Georgia revealed by multiple acoustic surveys during 2000/01
at the island and have shown that the timing of the acoustic survey can affect signifi cantly the ... Paper Title: Significant intra-annual variability in krill distribution and abundance at South ... acoustic surveys of Antarctic krill (Euphausia superba) were conducted around South Georgia in the 2000/01 ... March 2001 (late-season). The surveys were the first in a newly planned five-year series of observations ... predator species, some of which breed ashore at Bird Island but forage for krill, sometimes quite widely ... surveys at the very beginning and end of the fi eld season (October and March) in addition to the main ... logistic call at South Georgia before the onset of winter. SURVEY DESIGN The survey design, adapted from ... and west survey boxes suggested that semivariance reached a plateau at a range of less than 10 km ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 71–82 : Author(s): Brierley, A.S., C. Goss, S.A. Grant, J.L. Watkins, K. Reid, M. Belchier, I. Everson, M.J. Jessop, V. Afanasyev and J. Robst
-
Seabird interactions with longlining operations for Dissostichus eleginoides at the South Sandwich Islands and South Georgia
Paper Title: Seabird interactions with longlining operations for Dissostichus eleginoides at the ... South Sandwich Islands and South Georgia Abstract / Description: During seven days of operations ... involving the setting and hauling of longlines to catch the toothfish Dissostichus eleginoides around the ... increased rapidly after dawn and large numbers of Cape, giant and storm petrels and smaller numbers of white ... baited hooks, reduction of lights at night, and avoidance of the dumping of offal during longline ... on the starboard side of the vessel. Incoming fish were gaffed to prevent escape at the surface ... two hatches at the stern of the ship, where each coil was paid out after being weighted and tied to ... vicinity of the ship was recorded every 30 minutes. Almost all setting took place at night. The ship's ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 143–153 : Author(s): Ashford, J.R., J.P. Croxall, P.S. Rubilar and C.A. Moreno
-
Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic
with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic Abstract ... fishing operations were recorded by CCAMLR observers between 2000 and 2002 at South Georgia (Subarea 48.3 ... ). Demersal longlines, targeting Patagonian toothfish (Dissostichus eleginoides), were deployed in depths of ... most abundant marine mammal observed in the vicinity of vessels when lines were being hauled, being ... the Ross Sea at 78°S (Rice, 1998). Killer whales generally feed on a wide range of prey, and in the ... observations of killer whales and sperm whales interacting with longline vessels at the Falkland/Malvinas ... fi sh- ery at South Georgia ranged in length from 44 to 59 m (mean = 53 m), with a GRT of between ... at random intervals in order to cover as much as possible of the period when lines were being ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Author(s): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins
-
Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides)
Paper Title: Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides) Abstract ... / Description: We used the otoliths from a sample of Dissostichus eleginoides pre-recruits, whose length ... estimated from reading otoliths in a goodness-of-fit test. The majority of the otoliths (83.6%) were ... estimated to be from fish 1+ or 2+ years old, with mean total lengths of 32.5 cm and 41.3 cm respectively ... discussion at WG-FSA indicated that there was a clear need for validation of the age of individual fi sh ... survey. From the resulting age-at- length matrix the proportions of the population at each age ... , indicating a delay of several months in the formation of the opaque zone at South Georgia. If this is ... . At present, fi sh showing the fi rst translucent zone on the edge of the nucleus in January are con ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 1–10 : Author(s): Ashford, J., C. Jones, S. Bobko and I. Everson
-
A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia
fishing trip targeting crabs in Subarea 48.3, by the FV Pro Surveyor, presented in Otto and MacIntosh ... fishing trip, indicate that very few infected animals are found above the minimum 'commercial' size ... the whole area. Current information on prevalence from Subarea 48.3 is based on a single trip covering ... Paper Title: A preliminary investigation of the possible effects of rhizocephalan parasitism on ... the management of the crab fishery around South Georgia Abstract / Description: Relatively high ... levels of infection by a rhizocephalan barnacle have been found in the population of the crab Paralomis ... spinosissima, which has been harvested by a new fishery around South Georgia (Subarea 48.3) since 1992. One of ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 175–192 : Author(s): Basson, M
-
Precautionary spatial protection to facilitate the scientific study of habitats and communities under ice shelves in the context of recent, rapid, regional climate change
- ated with studying areas revealed by collapsing ice shelves and retreating glaciers. However ... (3): 293–303. Gille, S.T. 2002. Warming of the Southern Ocean since the 1950s. Science, 295: 1275–1277 ... environments and the structure of deep-sea benthic communities. Deep-Sea Res., 34 (12): 1911–1950. Griffiths ... Paper Title: Precautionary spatial protection to facilitate the scientific study of habitats and ... communities under ice shelves in the context of recent, rapid, regional climate change Abstract / Description ... Peninsula region. One of the most evident signs of climate change has been ice-shelf collapse; overall, 87 ... % of the Peninsula’s glaciers have retreated in recent decades. Further ice-shelf collapse will lead to ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 139–151 : Author(s): Trathan, P.N., S.M. Grant, V. Siegel and K.-H. Kock