Search results
-
Managing ecosystem uncertainty: critical habitat and dietary overlap of top-predators in the Ross Sea
Abstract: We summarize three types of data in order to increase appreciation among fishery ... managers of the close spatial and temporal ecological overlaps among top predators in the Ross Sea Shelf ... whale, though other species might also soon be exploited in the Ross Sea region. In addition to those ... two predators we also include other trophic competitors and (and in two cases predatory species ...
Meeting Document : WG-EMM-06/29 : Author(s): Testa, J.W., Stewart, B.S., Olmastroni, S., Lyver, P., Karl, B., Eastman, J., Barton, K., Ballard, G., Toniolo, V., Wilson, P., Ainley, D.
-
Pursuit of polynyas in the Antarctic peninsula area
influence biological activity. We pursued daily transition of coastal polynyas in the Antarctic Peninsula ... observations. A typical polynya existed off the tip of the Peninsula in 1987 and 1991. In the such years, sea ... and 1993. In the such years, polynyas did not existed. The typical polynya (nearly 500 x 200 km) in ... remarkably in several days. We speculated that annual variability of sea ice cover and consequently polynyas ...
Meeting Document : WG-EMM-97/69 : Author(s): Kimura, N., Shibazaki, K., Matsumura, S., Naganobu, M., Okada, Y.
-
Mesoscale abundance of fish in a ‘box’ west of Elephant Island
Abstract: Germany, in close collaboration with the United States Antarctic Marine Living (U.S ... of Elephant Island (Subarea 48.1) in order to study the meso – scale abundance of demersal finfish ... species. Diversity in the box was relatively low. The most abundant species were Gobionotothen ... . Concentrations of both species were found in a comparatively small band primarily along the 200 m isobath (160 ...
Meeting Document : WG-FSA-02/21 : Author(s): K.-H. Kock (Germany), C.D. Jones (USA), J. Appel (Germany), G. von Bertouch (CCAMLR Secretariat), D.F. Doolittle (USA), M. la Mesa (Italy), L. Psenichnov (Ukraine), R. Riehl (Germany), T. Romeo (Italy), S. Schöling (Germany) and L. Zane (Italy)
-
Analysis of krill trawling positions in the area north of the South Shetland Islands (Antarctic Peninsula area) from 1980/81 to 1998/99
Abstract: Positions of commercial krill operation for 1980/81 season to 1998/99 season in the ... latitudes where operations were undertaken. Operations tended take place in the north in early 1980s, but ... from mid-1980 onwards, they tended to happen in the south, with exceptions of 1994/95 and 1995/96 ... seasons. Predicted latitudes of operation significantly correlated with Salp densities in the Elephant ...
Meeting Document : WG-EMM-00/58 : Author(s): S. Kawaguchi (Japan)
-
Interannual variation in the diet of the Antarctic prion Pachyptila desolata at South Georgia
regurgitated by adult birds during five breeding seasons at Bird Island, South Georgia. In all years the diet ... . Antarctic krill Euphausia superba was the dominant prey item in three years and was replaced by calanoid ... copepods, especially Rhincalanus gigas and Calanoides acutus, in two years of low krill abundance ... . Differences in the prey species taken and observations of foraging behaviour suggest that in years of low ...
Meeting Document : WG-EMM-97/12 : Author(s): Croxall, J.P., Edwards, T.M., Reid, K.
-
Annual report of research fishing operations at Division 58.4.4b in the 2017/18 fishing season
toothfish (Dissostichus eleginoides) at Division 58.4.4b in the 2017/18 fishing season by France and Japan ... . One fishing cruise by French vessel (Ile Bourbon) took place in March 2018 and caught 1.6 tonne of D ... . eleginoides in 58.4.4b_2. The data set, C2 and Observer data, was provided by the CCAMLR Secretariat on the ... 3th August, 2018. In this paper, the data set during current fishing season (2017/18) was used for ...
Meeting Document : WG-FSA-18/67 : Author(s): Delegations of Japan and France
-
Quantifying within- and between-season variability in Adélie penguin fledgling weights: statistical and practical implications for detecting change
Béchervaise Island and use them in a power analysis as a continuation of the CEMP review. The statistical ... principles using raw data as recommended in Southwell et al. (2004). These models should be viewed as initial ... fledgling weights with a decline in resource availability, the consideration of total chick failure during ... severe food shortages and a possible change in variance associated with a change in the mean value. With ...
Meeting Document : WG-EMM-05/20 : Author(s): L. Emmerson, C. Southwell and J. Clarke (Australia)
-
A study of Patagonian toothfish (Dissostichus eleginoides) post tagging survivorship in Subarea 48.3
were carried out on 8 different vessels fishing in 48.3. Toothfish were selected for tagging as normal ... , and then were kept in tanks with varying degrees of seawater replacement for at least 12 hours after ... animals were included in the final analysis, with an overall survivorship of 89%. There were significant ... differences between vessels, and smaller animals and animals in better initial condition had a slightly higher ...
Meeting Document : WG-FSA-05/19 : Author(s): D. J. Agnew, J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones (United Kingdom), G. Breedt, S. Du Plessis, J. Van Heerdon (South Africa) and G. Moreno (Spain)
-
Seabird observations in Subareas 48.1, 48.2 and 88.3 and proposal for a new streamer line design
Abstract: A 43-day cruise on FV Tierra del Fuego took place in February and March 1997, as part ... of the New Fisheries Project developed by Chile in Statistical Subareas 88.3, 48.1 and 48.2. During ... this research study every measure currently in force was used to prevent incidental seabird mortality ... , carrying out bird observations in each one of the 52 castings with the Spanish-designed longlines as well ...
Meeting Document : WG-FSA-98/19
-
Assessment models for Patagonian toothfish in research block 58.4.3a_1 of Division 58.4.3a, Elan Bank for the years 2005-2014
m) CASAL models for stock status assessments of Dissostichus eleginoides in the research block ... excluding the data from fish tagged in 2012. The likelihood profiles for tagged fish released in 2012 for ... ELAN_1 model reflected a large number of recaptures of the tags released concentrated in the western area ... of research block. This is why the removal of 2012 tag release data boosted the MPD estimate of B0 in ...
Meeting Document : WG-SAM-15/24 : Author(s): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)