Search results
-
A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels
Paper Title: A post-processing method to remove interference noise from acoustic data collected ... data has been recognised as an important way to estimate the distribution and relative abundance ... of Antarctic krill (Euphausia superba), yet the quality and even the utility of the data may be seriously ... variable operators in the existing acoustic data post-processing software. The utility of the method ... data collected from Antarctic krill fishing vessels X. Wang Ocean University of China Qingdao ... of fishing-vessel-based acoustic data has been recognised as an important way to estimate the distribution ... of the data may be seriously degraded by interference noise due to the lack of synchronisation ... noise was introduced based on relevant virtual variable operators in the existing acoustic data post ...
Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Author(s): Wang, X., J. Zhang and X. Zhao
-
Status of the FIBEX acoustic data from the West Atlantic
Paper Title: Status of the FIBEX acoustic data from the West Atlantic Abstract / Description ... : Data from the FIBEX acoustic survey in the West Atlantic sector have been re-examined to check ... Herwig. While there is an error factor due to the combination of data collected at 50 kHz (Walther Herwig ... survey) with data collected at 120 kHz (all other vessels), it is concluded that this does not materially ... ACOUSTIC DATA FROM THE WEST ATLANTIC P.N. Trathan and I. Everson British Antarctic Survey High Cross ... , Madingley Road Cambridge CB3 OET, United Kingdom Abstract Data from the FIBEX acoustic survey ... to the combination of data collected at 50 kHz (Walther Herwig survey) with data collected at 120 kHz (all other ... vessels), it is concluded that this does not materially affect the estimated biomass. The data from ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 35–48 : Author(s): Trathan, P.N. and I. Everson
-
A review of data on abundance, trends in abundance, habitat use and diet of ice-breeding seals in the Southern Ocean (submitted to the 2008 Joint CCAMLR-IWC Workshop)
Paper Title: A review of data on abundance, trends in abundance, habitat use and diet of ice ... . Collating data from disparate sources, and understanding biases or uncertainties inherent in those data ... ; leopard seal, Hydrurga leptonyx; and Weddell seal, Leptonychotes weddellii). Data on populations ... features) and foraging (diet) are summarised, and potential biases and uncertainties inherent in those data ... Science, Vol. 19 (2012): 49–74 49 A REVIEW OF DATA ON ABUNDANCE, TRENDS IN ABUNDANCE, HABITAT USE ... and managing impacts such as exploitation and climate change. Collating data from disparate sources ... , and understanding biases or uncertainties inherent in those data, are important first steps for improving ... ; and Weddell seal, Leptonychotes weddellii). Data on populations (abundance and trends in abundance ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 49–74 : Author(s): Southwell, C., J. Bengtson, M. Bester, A.S. Blix, H. Bornemann, P. Boveng and M. Cameron, J. Forcada, J. Laake, E. Nordøy, J. Plötz, T. Rogers, D. Southwell, D. Steinhage, B.S. Stewart and P. Trathan
-
Catch per unit effort and proportional recruitment indices from Japanese krill fishery data in Subarea 48.1
fishery data in Subarea 48.1 Abstract / Description: Proportional recruitment indices and CPUE in Subarea ... 48.1 (Antarctic Peninsula region) from 1980 to 1996 were calculated based on logbook data from Japanese ... commercial krill trawlers. Proportional recruitment rates calculated from fisheries data were similar ... to those from scientific data (Siegel et al., 1997) and showed a close relationship to sea-ice indices ... EFFORT AND PROPORTIONAL RECRUITMENT INDICES FROM JAPANESE KRILL FISHERY DATA IN SUBAREA 48.1 ... (Antarctic Peninsula region) from 1980 to 1996 were calculated based on logbook data from Japanese ... commercial krill trawlers. Proportional recruitment rates calculated from fisheries data were similar ... to those from scientific data (Siegel et al., 1997) and showed a close relationship to sea-ice indices ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 47–63 : Author(s): Kawaguchi, S., T. Ichii and M. Naganobu
-
Analysis of variability of krill size and fish by-catch in the Japanese krill fishery based on scientific observer data
fishery based on scientific observer data Abstract / Description: To estimate the optimal relative sample ... size of scientific observer data collected on Antarctic krill commercial fishing vessels ... of variation (CV), although haul sample size affects CV for only krill length data up to 10% haul coverage ... . These results suggest that data collection by scientific observers on board commercial vessels provides ... in this area. Although broad-scale survey data obtained from fishing vessels through on-board scientific ... ), the data derived from fishing vessels are liable to have lower statistical precision than the data ... collected by research vessels. This is primarily because the data collected during fishing operations does ... not have a systematic design in contrast to scientific re- search. That is, the data obtained from ...
Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 31–47 : Author(s): Okuda, T. and M. Kiyota
-
Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
Paper Title: Preliminary analyses of data collected during experimental phases of the 1994/95 ... and 1995/96 Antarctic crab fishing seasons Abstract / Description: Data collected on board the FV American ... data from the Phase 2 depletion experiments did not have significant negative slopes. The insignificant ... their release sites. Density estimates from the mark-recapture data were in the order of 50 000 to 100 000 legal ... PRELIMINARY ANALYSES OF DATA COLLECTED DURING EXPERIMENTAL PHASES OF THE 1994195 AND 1995196 ANTARCTIC CRAB ... Jolla Shores Drive La Jolla, Ca. 92037, USA Abstract Data collected on board the FV American ... catch data from the Phase 2 depletion experiments did not have significant negative slopes ... and the movement of crabs away from their release sites. Density estimates from the mark-recapture data were ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Author(s): Watters, G
-
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 ... in relation to previous attempts to model fisheries data and to derive suitable abundance indices ... Analysis of haul data from the South Georgia krill fishery ... DATA FROM THE SOUTH GEORGIA KRILL FISHERY P.N. Trathan, I. Everson and E.J. Murphy British Antarctic ... Suite 303,5445 Mariner Street Tampa, F1.33609-3437, USA Abstract Data from individual hauls carried ... in relation to previous attempts to model fisheries data and to derive suitable abundance indices ... derived from Haul Data from the South Georgia Krill Fishery acoustic surveys (e.g. Biomass, 1986 ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Author(s): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes
-
Integration of CPUE data into assessments using the Generalised Yield Model
Paper Title: Integration of CPUE data into assessments using the Generalised Yield Model Abstract ... . The use of the method is illustrated using data for Patagonian toothfish (Dissostichus eleginoides ... Integration of CPUE data into assessments using the Generalised Yield Model ... . The use of the method is illustrated using data for Patagonian toothfish (Dissostichus eleginoides ... OF CPUE DATA INTO ASSESSMENTS USING THE GENERALISED YIELD MODEL G.P. Kirkwood Renewable Resources ... . The use o f the method is illustrated using data for Patagonian toothfish (Dissosticl?~ls eleginoldes ... and seasonal patterns in fishing mortality derived from existing data. In the assessment of toothfish ... as input data. Consequently, each trial will have a different initial population size and will have ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Author(s): Kirkwood, G.P. and A.J. Constable
-
Krill biomass in Area 48 and Area 58: recalculations of FIBEX data
Paper Title: Krill biomass in Area 48 and Area 58: recalculations of FIBEX data Abstract ... / Description: FIBEX acoustic and length frequency data held in the BIOMASS database were used to provide ... Krill biomass in Area 48 and Area 58: recalculations of FIBEX data ... FIBEX acoustic and length frequency data held in the BIOMASS database were used to provide ... : RECALCULATIONS OF FIBEX DATA P.N. Trathan1, D.J. Agnew2, D.G.M. Miller3, J.L. Watkinsl, I. Everson1, M.R ... . Thorleyl, E. Murphyl, A.W.A. Murrayl and C. Gossl Abstract FIBEX acoustic and length frequency data ... in the estimation of kriU abundance from acoustic survey data is acoustic target strength (TS) (cf. Miller ... survey data. In order to refine the krill biomass and subsequent yield estimates used to set ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 157–181 : Author(s): Trathan, P.N., D.J. Agnew, D.G.M. Miller, J.L. Watkins, I. Everson, M.R. Thorley, E. Murphy, A.W.A. Murray and C. Goss
-
Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance index
Paper Title: Analysis of trends in Japanese krill fishery CPUE data, and its possible use ... as a krill abundance index Abstract / Description: Haul-by-haul logbook catch and effort data from ... Analysis of trends in Japanese krill fishery CPUE data, and its possible use as a krill abundance ... Haul-by-haul logbook catch and effort data from the Japanese krill fishery for the 1980/81 to 2003 ... . 12 (2005): 1–28 ANALYSIS OF TRENDS IN JAPANESE KRILL FISHERY CPUE DATA, AND ITS POSSIBLE USE ... Shizuoka, 424-8633 Japan Abstract Haul-by-haul logbook catch and effort data from the Japanese krill fi ... always been questions as to whether fi shery-generated data could be used to give a catch-per-unit ... . Generally it is thought that the utility of krill CPUE data is limited because of the nature ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 1–28 : Author(s): Kawaguchi, S., S. Candy, S. Nicol, K. Taki and M. Naganobu