Search results
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TARGET STRENGTH STUDIES ON ANTARCTIC SILVERFISH (PLEURAGRAMMA ANTARCTICUM) IN THE ROSS SEA
: 1) theoretical, 2) ex situ measures on dead or living fish under experimental conditions, 3) in situ measures ... on free swimming fish in their natural habitat. A canvassing of the literature suggested that the type ... of study may influence the result. For example, some authors suggested that freezing the fish reduce ... the over-all backscatter of 30% (Sun et al. 1985), others that TS measurements on living fish ex situ would ...
Meeting Document : SG-ASAM-09/10 : Author(s): M. Azzali, I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi (Italy)
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WG-FSA-06/5
, collecting the data on biology of the object fishery and techniques of the fishery. As the gear of fishing ... of deepwater fish stocks its modification, a deep-water longline, appeared. Thus, now depending on the area ... ": for fishing on the shelf (at the average depths of about 125-130 m) and on the continental slope (from 250 ... down to 550 м). The scheme of a longline of the "spanish type" for fishing on European hake in shelf ...
Document : Site Section: Publications
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THE ROSS SEA AS A UNIQUE EVOLUTIONARY SITE
Heritage Sites. The focus herein will be on notothenioid fishes because their taxonomy and phylogeny ... Antarctic marine groups. The Ross Sea fish fauna includes 95 species of fishes, dominated by 61 species ... of notothenioids, an endemic perch-like group. Relative to fish fauna in warmer regions, the nature of the Ross Sea ... fish diversity overshadows the absolute numbers of species. Antarctic notothenioid fishes, living ...
Meeting Document : WG-EMM-09/13 : Author(s): J.T. Eastman and D.G. Ainley (USA)
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Progress towards validation of ageing of Dissostichus eleginoides using otoliths
, fish have been treated with strontium to mark their otoliths for validation of subsequent age ... estimation. Otoliths from 69 fish that were at liberty for at least 350 days were eventually examined ... annuli on the otoliths after the strontium mark was consistent with the time at liberty of the fish after ... determination in this species: investigating the accuracy of ageing small fish (1000 days; and developing ...
Meeting Document : WG-FSA-04/67 : Author(s): K. Krusic-Goluband R. Williams (Australia)
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Reports on abundance and biological information of toothfish in Division 58.4.4a & b by Shinsei Maru No. 3 in 2012/13 season
higher in 2011 but showed no clear tendencies with the years in SSRU C. Fish in single-hooked and good ... . The possible maximum tagging rate was calculated to be 30.1 fish per tonnes and 23.5 fish per tonnes in SSRUs ... C and D, respectively. Accordingly sufficient numbers of fish suitable for tagging was captured by using the normal ... trotline system. A total of 233 fish of D. eleginoides in good physical condition and single-hooked were ...
Meeting Document : WG-SAM-13/20 : Author(s): K. Taki, T. Ichii, T. Iwami and M. Kiyota (Japan)
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WG-FSA-11/53
OF FISHING GEAR AND PROCEDURES OF SETTING / HAULING OF SPANISH LONGLINE SYSTEM FOR TOOTHFISH IN CCAMLR AREA ... information on the fishing gear and the procedures for setting/hauling has not been described in detail ... vessels, “Jung Woo No. 2” and “Jung Woo No. 3”. Although the Spanish longline fishing is similar ... No. 3”. 1. Terminology 2. Fishing gear configuration 3. Soaking Time 4. Setting 5. Hauling. 1. Terminology ...
Document : Site Section: Publications
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Patterns in the diet of mackerel icefish (Champsocephalus gunnari) on the South Georgia and Shag Rocks shelf (CCAMLR Subarea 48.3)
of fish caught in research trawls at South Georgia and Shag Rocks in January 2004. The results ... examined (2+, 3+ and 4++), with the younger fish consuming more T. gaudichaudi and small euphausids ... and the older fish taking more krill and fish. The change in diet reflects a shift from smaller to larger prey ... The diet of the mackerel icefish was investigated from stomach contents analysis of fish caught ...
Meeting Document : WG-FSA-04/44 : Author(s): M.A. Collins, R. Mitchell, G. Tarling and M. Belchier (United Kingdom)
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The diet of Antarctic fur seals Arctocephalus gazella during the breeding season at South Georgia
was the main prey item, occurring in 88% of all scats (n=497), whereas fish occurred in 47% and squid ... failure among krill predators. The frequency of occurrence of fish was much higher than in previous ... studies; the pattern of fish consumption showed a consistent seasonal pattern in three of the four years ... studied. Of the total number of the myctophid Protomyctophum choriodon, the most numerous- fish taxon, 98 ...
Meeting Document : WG-EMM-95/28 : Author(s): Arnould, J.P.Y., Reid, K.
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Assessing data requirements for tag-based estimates of local biomass in data-poor and exploratory fisheries
the impact on the numbers of tagged fish recaptures and accuracy of tag-based estimates using the Chapman ... will have a high risk of over-estimating biomass and that for a given number of tagged fish available ... of 6 recaptures when there were approximately 270 tagged fish available for recapture. To increase the chance ... of achieving the same level of accuracy to 80%, a minimum of 20 tagged fish recaptures were required when ...
Meeting Document : WG-SAM-17/13 : Author(s): L. Robinson, P. Burch and K. Reid
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Report of the South Georgia groundfish survey (Subarea 48.3) in January 2006
, which produced biomass estimates of between 91000 and 117000 tonnes. The catches were dominated by fish ... of 20-25 cm (putative 2+), but unusually large numbers of fish of ~ 50 cm were also caught ... to the N and NE of South Georgia. Fish in spawning condition (Stage IV) were found at the eastern end ... of the island and at Shag Rocks. Spent fish were found throughout the survey area, suggesting that spawning may ...
Meeting Document : WG-FSA-06/51 : Author(s): M.A. Collins, C. Jones, J. Clark. S. Fielding, J. Slakowski, T. North, W. Reid and J. Watts (United Kingdom)