Résultats de la recherche
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Antarctic's pelagic ecosystem: how environmental change will affect Salpidae population structure
Abstract: Dynamic climate changes have become noticeable in recent decades, especially in the ... vulnerable region of Western Antarctic. The relatively simple food web of this area relies on krill ... - Euphausia superba. Presumably as a result of climatic fluctuations, a decrease in the numbers of this ... crustacean has been recorded, followed by an increase in the population of the gelatinous zooplankter Salpa ...
Meeting Document : WG-EMM-15/P08 : Auteur(s): A.W. Słomska, A.A. Panasiuk-Chodnicka, M.I. Żmijewska and M.K. Mańko (Poland)
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Domain 1 Marine Protected Area Preliminary Proposal PART C: Biodiversity Analysis by MPA zones
Abstract: This document contributes to the planning process for the designation of a Domain 1 MPA ... led by Argentina and Chile. In particular, this paper provides a biodiversity analysis by zone for the ... Domain 1 MPA preliminary proposal introduced during the last EMM meeting (WG-EMM-17/23; WG-EMM 17/24; WG ... , especially when their distribution is complex. The Domain 1 MPA model was generated based on Priority Areas ...
Meeting Document : SC-CAMLR-XXXVI/BG/21 : Auteur(s): Delegations of Argentina and Chile
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Southern Ocean fishing vessel management
Abstract: This paper provides an update on the development of safety measures for non-SOLAS ... vessels, including fishing vessels, by the International Maritime Organization (IMO) and refers to ... initiatives aimed at the implementation of the IMO’s Polar Code. It also elaborates on the development of an ... action plan to address marine plastic pollution from shipping by the IMO. ASOC calls on CCAMLR and its ...
Meeting Document : CCAMLR-38/BG/47 : Auteur(s): Submitted by ASOC
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Zooplankton target strength: volumetric or areal dependence?
MHz and the dependence of these data on animal volume versus cross-sectional area was explored The 420 ... kHz and I MHz data were collected with a dual-beam sonar system and the 200 kHz data with a split-beam ... seawater. The data were compared to both empirical and theoretical models of reduced target strength (TS ... normalized by the square of the animal length) versus ka (the product of wave number and equivalent ...
Meeting Document : WG-Krill-94/13 : Auteur(s): D.A. Demer and L.V. Martin (USA)
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Marine debris: a persistent and emerging threat to antarctic ecosystems
Abstract: CCAMLR has had success in tackling marine debris from local sources in the Southern ... Ocean; however it remains a persistent threat. Current understanding of the distribution and impacts of ... evidence suggests that microplastic concentrations in the Southern Ocean are higher than previously thought ... , and that they are from local and international sources. Knowledge of the impacts of debris ...
Meeting Document : SC-CAMLR-XXXVI/BG/29 : Auteur(s): Submitted by ASOC
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A method for inferring movement rates of fish from mark–recapture data
Abstract: This paper presents methods to infer the rate of movement of fish that are marked ... , released, and subsequently captured. The information that is available is the location and date of the ... release and the recapture. In addition, the intensity of fishing effort (i.e. sampling) by location and ... time is known. The simplest approach is to make a frequency plot of the distance between each release ...
Meeting Document : WG-FSA-05/66 : Auteur(s): C. Wilcox (Australia)
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Habituation to an acoustic harassment device (AHD) by killer whales depredating demersal longlines
fisheries that suffer significant losses caused by odontocete depredation. However, the efficacy of AHDs to ... deter odontocetes from fishing gear remains poorly investigated. To determine the effectiveness of AHDs ... m from the source) from a Patagonian toothfish longliner operating off the Crozet Islands while it ... a 10- 300 m range from the vessel, as they only have access to fishing gear during hauling. We ...
Meeting Document : WG-FSA-14/P04 : Auteur(s): P. Tixier, N. Gasco, G. Duhamel and C. Guinet
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Interannual variability in Antarctic krill (Euphausia superba) density at South Georgia, Southern Ocean: 1997 – 2013
estimates for a 17 year time series of acoustic surveys of the Western Core Box at South Georgia. Krill ... targets were identified in acoustic data using the approved CCAMLR protocol, that is using a multi ... -frequency identification window and converted to krill density using the Stochastic Distorted-Wave Born ... g m-2) and its distribution was highly skewed with many zero observations. Within each survey the ...
Meeting Document : WG-EMM-14/P04 : Auteur(s): S. Fielding, J. Watkins, P. Trathan et al.
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Evaluating methods to assess yield of Patagonian toothfish (Dissostichus eleginoides) in CCAMLR Division 58.5.2
Abstract: This paper describes aspects of the Management Strategy Evaluation (MSE) being ... developed to evaluate possible management strategies for the Patagonian toothfish fishery in Division 58.5.2 ... . As requested by the Subgroup on Assessment Methods, we elaborate the plausible operating models ... currently being used for Patagonian toothfish in Division 58.5.2, the types of data and observations of the ...
Meeting Document : WG-FSA-05/69 : Auteur(s): A.J. Constable, I. Ball, B. Raymond, S. Candy, R. Williams (Australia) and A. Dunn (New Zealand)
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Fishing for toothfish using pots: results of trials undertaken around South Georgia, March–May 2000
Abstract: During the period March to May 2000, the UK undertook trials of a pot fishing method to ... catch D. eleginoides around South Georgia (Sub-area 48.3). This method has the potential to minimise, or ... eliminate, incidental bird mortality when compared to the standard longline method. This paper describes the ... trial, the results, and discusses the commercial viability of this fishing method for toothfish ...
Meeting Document : WG-FSA-00/23 : Auteur(s): D. Agnew, T. Daw, M. Purves and G. Pilling (United Kingdom)