Результаты поиска
-
PRELIMINARY RESULTS OF TRIALS TESTING MODIFIED LONGLINE GEAR ‘TROTLINES’ IN PRESENCE OF CETACEANS IN SUBAREA 48.3
cetaceans were present. This difference increased with increasing abundance of cetaceans highlighting the ... potential of this gear to reduce cetacean depredation. 3. By-catch to catch ratio was greater by number for ... Spanish system lines when cetaceans were present during hauling. 4. A large percentage of skates caught on ... . Consequences of a move to trotlines would therefore lead to: i. Some positive benefits by reducing cetacean ...
Meeting Document : WG-FSA-08/44 : Автор(ы): R.E. Mitchell, J. Clark, P. Reyes, L. Jones, J. Pearce, C.E. Edwards and D. Agnew (UK)
-
Mitigation of Macrourus by-catch in research block 58.4.1_6 and estimation of Macrourus biomass and sustainable catch in Divisions 58.4.1 and 58.4.2
) avoidance, ii) mitigation and iii) the setting of sustainable by-catch limits if mortality is not ... preventable (SC-CAMLR-XXII, paragraph 5.230). Here, we undertake a risk assessment of the effects of ... block 58.4.1_6 in particular. We investigate the distribution of D. mawsoni and Macrourus spp. catch ... grid includes only areas of low Macrourus spp. by-catch rates, or (2) replace the requirement for ...
Meeting Document : WG-FSA-17/23 : Автор(ы): D. Maschette, P. Burch, P. Yates and P. Ziegler
-
Cycles of Euphausia superba recruitment evident in the diet of Pygoscelid penguins and net trawls in the South Shetland Islands, Antarctica
Abstract: Size and sex of Antarctic krill taken from chinstrap and gentoo penguin diet were ... sustaining the population during each cycle. Penguin diet samples contained adult krill of similar lengths to ... proportionately more females when the krill population was dominated by large adults at the end of the cycles; net ... samples showed greater proportions of males in these years. These patterns are comparable to those ...
Meeting Document : WG-EMM-07/P2 : Автор(ы): A. Miller and W. Trivelpiece (USA)
-
Estimation of the incidental capture of seabird species in commercial fisheries in New Zealand waters, 2000/01
Abstract: Ministry of Fisheries observers reported 1236 seabird captures from fishing operations ... novaezelandiae) trawl fisheries accounted for 94% of the 701 seabird captures in observed trawl fisheries ... . Observed incident rates in longline fisheries were highest in the ling longline fishery: 24% of observed ... ling autoline sets caught seabirds, compared with 6% of observed chartered tuna longline sets caught ...
Meeting Document : WG-FSA-04/55 : Автор(ы): S.J. Baird (New Zealand)
-
A possible model of metapopulation structure of Dissostichus eleginoides in the southern Indian Ocean
Abstract: Based on data on movements of Patagonian toothfish derived from tagging experiments and ... analysis of toothfish DNA from Heard Island and McDonald Islands (HIMI), Kerguelen, Crozet and Marion ... some or all of the subadult fish at HIMI migrate northwestwards to Kerguelen and Crozet. Larval fish ... spawned to the north-west of HIMI then return to HIMI in the Antarctic Circumpolar Current. If such a ...
Meeting Document : WG-FSA-03/72 : Автор(ы): R. Williams, A.J. Constable, C. Davies and S. Candy (Australia)
-
Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
Abstract: Inter- and intra-annual variability of commercial krill trawling positions for the 1980 ... /81 to 1999/2000 seasons in the area to the north of South Shetland Islands were analyzed in relation ... the shelf across to the outer shelf in the early to late 1990’s. Intra-annual variation of trawling ... the season. Trawling positions seemed to be primarily governed by the distribution of larger mature ...
Meeting Document : WG-EMM-01/35 : Автор(ы): S. Kawaguchi and K. Segawa
-
Distribution, biological characteristics and biomass of mackerel icefish based on the results of the trawling survey carried out at RV Atlantida in February 2000
Abstract: The results of mackerel icefish (Champsocephalus gunnari) trawling survey carried out ... C.gunnari were feeding. In all parts of the Subarea, except the North-Western one, C. gunnari of 22-28 cm in ... coefficient. The objective evidences are submitted to prove that a certain part of C.gunnari stock may stay in ... . Arrangement of regular trawling-acoustic surveys in the area may improve the accuracy of this important ...
Meeting Document : WG-FSA-00/51 : Автор(ы): Zh.A. Frolkina and P.S. Gasiukov (Russia)
-
DEVELOPMENT AND IMPLEMENTATION OF AN ACCREDITATION FRAMEWORK FOR PARTICIPATION IN THE CCAMLR SCHEME OF INTERNATIONAL SCIENTIFIFC OBSERVATION
Scientific Committee tasked it with the development of minimum standards to facilitate accreditation of ... -conveners outline the elements of an accreditation framework, and a workplan for it implementation, for ... consideration by the Scientific Committee. This paper outlines the roles and responsibilities of the Scientific ... -conveners of the ad hoc Technical Group for At- Title: DEVELOPMENT AND IMPLEMENTATION OF AN ACCREDITATION ...
Meeting Document : SC-CAMLR-XXVIII/BG/09 : Автор(ы): Co-conveners of the ad hoc Technical Group for At-
-
Depletion experiment of Dissostichus eleginoides stock in the south of South Georgia Island (Antarctica)
Abstract: Ten hauling for Dissostichus eleginoides were performed from the 11lth to the 21 of ... April 1994, wich were related between them, when they contact within a circle of 10 nm of diameter ... projected to 3244.8 nm2, obtaining an estimated biomass of 937.8 ton. Due to statistical limitations of ... of Dissostichus eleginoides stock in the south of South Georgia Island (Antarctica) Approval ...
Meeting Document : WG-FSA-94/31 : Автор(ы): P. Rubilar, C.A. Moreno (Chile) and J. Ashford (United Kingdom)
-
A system-of-equations approach to modeling age structured fish populations: the case of Alaskan red king crab, Paralithodes camtschaticus
Abstract: This paper presents a simultaneous system-of-equations approach to modeling age ... properties of a delay-difference model. The framework shares a common spawner-recruit function across age ... variable, lessening the effect of measurement errors in estimation. The dynamic features of the underlying ... effect of measurement error and improve overall estimation efficiency. A seemingly unrelated regression ...
Meeting Document : WS-CRAB-93/23 : Автор(ы): J.A. Greenberg, S.C. Matulich and R.C. Mittelhammer (USA)
Страницы
- « первая
- ‹ предыдущая
- …
- 242
- 243
- 244
- 245
- 246
- 247
- 248
- 249
- 250
- …
- следующая ›
- последняя »