Результаты поиска

1. Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery

   Paper Title:  Effect of line sink rate on albatross mortality in the Patagonian toothfish longline ... vessels to derive a sink rate and line-weighting regime that would minimise the capture of albatrosses ... /s should greatly reduce the incidental take of albatrosses. For autoline vessels with gear and line ... -setting characteristics similar to the experimental vessel, this sink rate should be achievable with 4 kg ... the end of the snoods on the mother line from the anchors. The anchors were attached to 18 mm ropes ... diameter floats, a radio beacon and a flag: these marked each end of the anchor line and were used to ... in Figure 2. The longline on the In Sung 66 was marked on each end by four to six 1 m diameter ... floats, a radio beacon and a light to enable the end of the line to be found in case the line broke ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Автор(ы): Robertson, G.G

2. Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations

   Paper Title:  Fishing ground selection in the Antarctic krill fishery: trends in patterns across ... characterised using STATLANT and CCAMLR fine-scale data. Among the 15 small-scale management units (SSMUs ... ) within Subareas 48.1, 48.2 and 48.3, including the pelagic SSMUs, only one-third were identified as major ... contributors to the total catch. A recent shift in operational timing towards later months within fishing ... increased. Subarea 48.3 became the main fishing area from 1985 until 1993, but after this period the level ... , beginning operations late in the 1999/2000 fish- ing season. For the first two seasons, it only oper- ated ... , beginning with the SSMUs in Subarea 48.1 earlier in the season. Trends in catches in the Japanese krill ... the pelagic SSMUs. The second period is 1990 onwards, after operations in Subarea 48.3 had begun ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Автор(ы): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu

3. VARIATION IN DEMERSAL FISH SPECIES RICHNESS IN THE OCEANS SURROUNDING NEW ZEALAND: AN ANALYSIS USING BOOSTED REGRESSION TREES

   constrained to reflect the known performance of trawl gear. Species richness declined with increasing cod-end ... characteristics using an extensive collection of trawl data from the oceans around New Zealand. Analyses were ... ‘stochastic gradient boosting’). Depth was the single most important environmental predictor of variation in ... their depth. Variables describing trawl length, trawl speed, and cod-end mesh size made a substantial ...

   Meeting Document : WS-VME-09/P04 : Автор(ы): Leathwick, J.R., Elith, J., Taylor, P., Francis, M.P., Hastie, T.

4. SPATIAL AND TEMPORAL VARIATION IN ATTRIBUTES OF ADELIE PENGUIN BREEDING POPULATIONS: IMPLICATIONS FOR UNCERTAINTY IN ESTIMATION OF THE ABUNDANCE OF BREEDING PENGUINS FROM ONE-OFF COUNTS

   with date-specific correction factors to estimate the population attempting to breed at the beginning ... adults, nests or chicks across several or many breeding sites, and the timing of these counts is often ... outside the control of researchers. Time series counts of Adelie penguin breeding population attributes ... (adults, nest and chicks) within the breeding period show considerable variability across space and time ...

   Meeting Document : WG-EMM-PSW-08/07 : Автор(ы): C. Southwell, J. McKinlay, R. Pike, D. Wilson, K. Newbery and L. Emmerson (Australia)

5. KRILL FISHERY BEHAVIOUR IN THE SOUTHWEST ATLANTIC

   mean travel distances are longer after the least catch levels, and the travel distances decreases as ... close even after considerable number of hauls. The scales of distance after 50 tows from the original ... to year variability in the probabilities of operating within a local range after a number of tows. In ... the 1999/2000 season the probability that hauls would be made within a 30nm range after 300 hauls was ...

   Meeting Document : WG-EMM-08/39 : Автор(ы): S. Kawaguchi (Australia)

6. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

   Paper Title:  Towards an initial operational management procedure for the krill fishery in ... (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status ... , and an algorithm for specifying the levels of regulatory mechanisms (e.g., a catch control law) that ... depends on the results of the assessment. The development and selection of a procedure requires a basis ... the availability of CPUE data) is assumed to commence after 10 years of annual catches of 0.4 million ... than would occur in practice under the procedure described here. After this initial five year period ... that the size of the resource has fallen too low. To this end a target CPUE level (CPDEtar) is chosen ... projection period considered, rather than the average biomass at the end of the period as might be the case ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Автор(ы): Butterworth, D.S.

7. Analysis of haul data from the South Georgia krill fishery

   Paper Title:  Analysis of haul data from the South Georgia krill fishery Abstract / Description ... :  Data from individual hauls carried out by vessels operating in the South Georgia krill fishery between ... 1994 and 1996 were examined and a range of descriptive measurements reflecting the fishery operation ... were produced. The measurements emphasise that the krill fishery at South Georgia was geographically ... tightly clustered towards the end of the season. After each haul is complete, the distance to the next ... at South Georgia occurs during the austral winter and spans the end of one CCAMLR reporting year ... and the beginning of the next. Therefore to aid clarity in this study, data have been analysed by ... fish; fishing end time: the time at which hauling started and the net stopped fishing; * haul end ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Автор(ы): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes

8. CALIBRATION ERROR IN THE AMLR PLANKTON TIME SERIES

   Abstract:  Analysis of the time series of the volume of water filtered during tows using a 1.8 m ... Isaac-Kidd Midwater Trawl (IKMT) from 1992 to 2007 showed a marked decline (~35%) in the volume of water ... filtered beginning in 2000. Analysis of tow time duration, reported ship speed during tows, and mean number ... of rotor counts from the flow meters showed no significant trends. The discrepancy in volume is ...

   Meeting Document : WG-EMM-08/19 : Автор(ы): C. Reiss (USA)

9. A case of giant squid attack on Antarctic toothfish Dissostichus mawsoni Norman, 1937 (Perciformes, Nototheniidae) caught on bottom-set longline in the Ross Sea

   Abstract:  In the beginning of February 2005, during the hauling of bottom-set longline in the ... Ross Sea (East Antarctic) from the depth of 1480 m to the surface a very large squid taken a large ... by a longline hook, was hauled up to the board of longliner VOLNA. Squid was very active and did not ... aboard but it was registered with the use of photo- and video cameras. This allowed to determine its ...

   Meeting Document : WG-FSA-06/P3 : Автор(ы): Petrov, A.F.

10. A suggested bottom trawling survey on the Ob and Lena Banks

    hydrodynamic forces opening the codend. These forces, different for different cod end constructions, have great ... Abstract:  The paper presents calculations of water flow velocity through the codend under the ... assumption that the flow is uniform and equal on its entire surface. The calculations were made for different ... ratios of cod end length to its diameter, mesh bar length to mesh bar diameter, and for various mesh ...

    Meeting Document : WG-FSA-93/10 : Автор(ы): W. Moderhak (Poland)

Страницы