Résultats de la recherche
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
animal count data to a common reference point of breeding chronology for species with a complex temporal ... final adjusted estimates. Adjustment for availability bias is achieved by applying an adjustment factor ... sites in Antarctica. These examples focus on adjusting counts of adults to an effective number of ... Paper Title: Integrating Count Effort by Seasonally Correcting Animal Population Estimates ... IntegratIng Count effort by SeaSonally CorreCtIng anImal PoPulatIon eStImateS (ICeSCaPe): a method for ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... through to the final adjusted estimates. Adjustment for availability bias is achieved by applying an ... for estimating abundance and its uncertainty from count data Introduction Counts of animal ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Auteur(s): McKinlay, J., C. Southwell and R. Trebilco
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An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data
Paper Title: An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank ... fine-scale catch and effort data held by CCAMLR for BANZARE Bank, as well as descriptive analyses of ... depletion analysis of stratified catch and effort data indicate that there is strong evidence for depletion ... species in catches in one ground for the first time. Incomplete reporting of biological information for by ... activity. Maximum line lengths for the 2004/05 to 2006/07 seasons were between 30 and 40 km, giving an ... – Division 58.4.3a) and an estab- lished fishery for D. eleginoides around Heard and McDonald Islands ... . mawsoni. As an explora- tory fishery, the catch limit for the division has been nominally set at 300 ... of fish- ing grounds and low level of data coverage avail- able for an exploratory fishery of this ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Auteur(s): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara
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Comparison of two methods to assess fish losses due to depredation by killer whales and sperm whales on demersal longlines
aimed at providing two indirect methods of assessment of depredated biomass over an 11-year period (2003 ... comparable results and thus strong support for the CPUE method. From these two methods, depredation rates ... depredation occurs on fish in the marine environment. This is the case for killer whales (Orcinus orca) and ... Paper Title: Comparison of two methods to assess fish losses due to depredation by killer whales ... biomass over an 11-year period (2003 to 2013), accounting for spatial variations of depredation levels ... Patagonian toothfish represents an equivalent of US$ 2.5–2.9 million of fish value per year based on the ... grounds, which are likely to be traditional feeding grounds for these two species (Sigler et al., 2008 ... grenadier proportion. The ideal case would be an exact 50% proportion for both spe- cies to best detect ...
Science Journal Paper : CCAMLR Science, Volume 22 (CCAMLR Science, Volume 22) : 1–14 : Auteur(s): Gasco, N., P. Tixier, G. Duhamel and C. Guinet
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Demographic characteristics of the Adélie penguin population on Béchervaise Island after 12 years of study
, fecundity levels and population numbers) were analysed for the Béchervaise Island Adélie penguin colony in ... . The population model predicted an annual population growth rate of 0.3% compared to the 1.2–1.8 ... most likely explanation for the discrepancy. As is the case for most long-lived seabird species, growth ... in this paper provide a basis for the development of data reporting formats for CEMP Standard Method ... . An expected value for mean penguin breeding success over 20 years was also calculated. This value ... year (Table 1). Breeding success was calculated in terms of chicks per nest with eggs for each season ... (86.2%) was used for all birds aged 1 year and older. This mean value was employed to avoid the bias ... possible for the existing clutch size of the species. Initiation of breeding at an earlier age is ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 53–74 : Auteur(s): Clarke, J., L.M. Emmerson, A. Townsend and K.R. Kerry
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Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach
established. Data from the CCAMLR Convention Area suggest that M. hyadesi may live for two years, but this may ... Paper Title: Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda ... , Ommastrephidae) in the Scotia Sea: an ecological approach Abstract / Description: In anticipation of the ... development of a new fishery for the ommastrephid squid Martialia hyadesi in the Scotia Sea, this paper ... in that year (Rodhouse, 1991). In February 1989 two Japanese squid jiggers carried out an ... the CCAMLR Convention Area suggests a two-year life cycle for the purpose of drawing up ... precautionary measures for the CCAMLR Convention Area, the tentative assumption of a two-year life cycle ... MEASURES FOR A NEW FISHERY ON MARTIALIA HYADESI (CEPHALOPODA, OMMASTREPHIDAE) IN THE SCOTIA SEA: AN ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 125–139 : Auteur(s): Rodhouse, P.G
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An alternative method for estimating the level of illegal fishing using simulated scaling methods on detected effort
Paper Title: An alternative method for estimating the level of illegal fishing using simulated ... scaling methods on detected effort Abstract / Description: A new method for estimating illegal fishing ... the number of detections for a given level of illegal fishing, the more often the illegal fishers will ... estimated amount of fishing for a given number of illegal cruises. As the number of illegal cruises ... ): 143–161 143 AN ALTERNATIVE METHOD FOR ESTIMATING THE LEVEL OF ILLEGAL FISHING USING SIMULATED ... , which occurs for a given set of observations for an area can be given by: est i i F P D= ∑ (2 ... the expected amount of fi shing or an appropriate multiplier P given the number of detections. For ... patrols starting every 30 days and lasting for 16 days. All dates are given in number of days from some ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 143–161 : Auteur(s): Ball, I
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An iterative model to construct an age/length key to assess the age composition of a new fishery for Dissostichus eleginoides in Chilean waters
Paper Title: An iterative model to construct an age/length key to assess the age composition of a ... new fishery for Dissostichus eleginoides in Chilean waters Abstract / Description: Traditional ... could be biased. By using an iteration algorithm it is possible to overcome this limitation. The age ... composition of catch for Dissostichus eleginoides was obtained with the application of a single age/length key ... could be biased. By using an iteration algorithm it is possible to overcome this limitation. The age ... composition of catch for Dissostichus eZeginoides was obtained with the application of a single age/length ... ), se an iguales tanto, en la primera muestra (k = 1) usada para estimar la clave longitud-edadcomo, en ... los 3 y 20 aiios y la moda estuvo en el grupo de edad 12. En general se aprecia que los machos son ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 11–20 : Auteur(s): Robotham, V. H. and Z. Young U.
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Brief comments on the simulation study made by Professor Butterworth on krill fishing by an individual Japanese trawler
values used for the minimum catch rate per overall elapsed time. It is suggested that an improvement in ... fishing by an individual Japanese trawler Abstract / Description: In this paper, three essential ... questions are raised concerning the simulation study of the Japanese krill fishery carried out by ... being produced, and the demand for each product varies substantially from one season to the next ... , the demand for each product can be seen to change from year to year. We do, therefore, agree with him ... MADE BY PROF. BUTTERWORTH ON KRILL FISHING BY AN INDIVIDUAL JAPANESE TRAWLER T. Ichii and Y. Endo ... information on searching times is a burden for fishermen and its usefulness is still doubtful at this stage ... Abstract In this paper, three essential questions are raised concerning the simulation study of the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 347–350 : Auteur(s): Ichii, T. and Y. Endo
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Assessment and tag program adaption methods for exploratory fisheries in the CAMLR Convention Area: an example application for Division 58.4.3a
Convention Area: an example application for Division 58.4.3a Abstract / Description: A methodology for the ... tagging levels that will produce an expected abundance estimate in the following year of a given precision ... Paper Title: Assessment and tag program adaption methods for exploratory fisheries in the CAMLR ... initial stock assessment and adaption of catch limits and tagging rates is presented for new and ... be no recaptures to base an abundance esti- mate on). For an exploitation rate of one, the CV in ... given year or years. No dispersion terms were estimated for the recapture event for obvious reasons ... Assessment And tAg progrAm AdAption methods for explorAtory fisheries in the CAmlr Convention AreA: An ... will produce an expected abundance estimate in the following year of a given precision whilst ensuring ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 101–113 : Auteur(s): Hillary, R.M
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An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL
Paper Title: An integrated stock assessment for the Patagonian toothfish (Dissostichus ... eleginoides) for the Heard and McDonald Islands using CASAL Abstract / Description: An integrated stock ... assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands (CCAMLR ... Division 58.5.2), using CASAL and data consisting of multi-year random stratified trawl survey (RSTS ... -year seasons) for the main trawl ground, and (v) the use of an improved estas edades disminuye. El ... (q_CPUE) was an estimated parameter calculated separately for each of the two CPUE series. Commercial ... , Australia Email – steve.candy@aad.gov.au Abstract An integrated stock assessment for the Patagonian ... an integrated assessment of stock status and recruitment variability for D. eleginoides in Division ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Auteur(s): Candy, S.G and A.J. Constable