Search results
-
Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
orques (Orcinus orca) et les cachalots (Physeter macrocephalus) autour de la Géorgie du Sud. Depuis 2003 ... , on note la présence de cétacés sur 22% des 14 300 palangres observées, dont 3,8% concernent des orques ... des lignes de pêche, entraînant généralement une baisse d'environ 50% de la CPUE. Souvent en plus ... captures, pouvant faire baisser la CPUE de 20% au maximum. Ces dernières années, la présence de cachalots ... 3.8% and sperm whales on 17.7% of lines. Killer whales appear in pod sizes normally of 4 to 10 animals ... toothfish, usually depressing CPUE by about 50%. Sperm whales occur in smaller pod sizes, normally between 1 ... whales have been more frequently encountered in recent years, occurring in larger pod sizes, whereas ... the season in August. Killer whale interactions appear to be more consistent with no obvious pattern ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Author(s): Moir Clark, J. and D.J. Agnew
-
Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008
e 1: O cc ur re nc e of m yc to ph id s pe ci es in b y- ca tc h. R at e of o cc ur re ... in in g ea ch s pe ci es ( ta xa ) to th e to ta l nu m be r o f h au ls c on ta ... length (m m ) P e rc e n ta ge c o m po si ti o n 2002 (n=20) 2004 (n=33) 2008 (n=643) 2002 ... 60 70 80 90 100 110 120 130 Standard length (m m ) P e rc e n ta ge c o m po si ti o n 2008 ... Paper Title: Annual changes in species composition and abundance of myctophid fish in the north ... samples collected by scientific observers on board Japanese commercial krill fishing vessels in the area ... 10 myctophid species were identified in the by-catch samples, among which Krefftichthys anderssoni ... ichthyofauna in this area, although this species used to be dominant in the Antarctic coastal waters. In ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Author(s): Iwami, T., M. Naganobu, K. Taki and M. Kiyota
-
The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands (Indian Ocean sector of the Southern Ocean)
la zone des îles Kerguelen depuis 20 ans, d’abord avec des chalutiers puis des palangriers. C’est la ... pêcherie la plus ancienne du secteur indien de l’océan Austral. Cette dernière, depuis 1997, a cependant ... été confrontée au problème de la pêche INN (illégale, non déclarée et non réglementée). Une analyse ... GLM (modèle linéaire généralisé), effectuée à partir des données statistiques de la pêche légale ... Paper Title: The Patagonian toothfish (Dissostichus eleginoides) fishery in the Kerguelen Islands ... eleginoides) have been fished in the Kerguelen Islands zone for 20 years, firstly with trawlers and more ... recently with longliners. This is the oldest fishery targeting D. eleginoides in the Indian Ocean sector of ... the Southern Ocean. However illegal, unreported and unregulated (IUU) fishing has occurred in the area ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 1–25 : Author(s): Lord, C., G. Duhamel and P. Pruvost
-
Results of Soviet investigations of the distribution and ecology of pelagic squids (Oegopsida) in the Southern Ocean
~ of high bioproductivity south of 60 S. RESULTATS DES ETUDES SOVIETIQUES SUR LA REPARTITION ET L'ECOLOGIE ... term sur la repartition et l'ecologie des cal.mars pelagiques (Oegopsida) dans l'ocean Austral.. En ... €ce Brachioteuthis riisei. - 80 - Au cours des derni~res a.nnees (1978-1984), la collection s'est ... elargie par le pr~levernent de deux ou trois dDuzaine s de sp~c imens identifies pour la plupart comme ... (Oegopsida) in the Southern Ocean Abstract / Description: The USSR has carried out a long-term investigation ... of the distribution and ecology of pelagic squids (Oegopsida) in the Southern Ocean. In 1965–1977 a ... specimens of that total were identified as Brachioteuthis riisei. In recent years (1978-1984) the collection ... in Antarctic waters and data on squid beaks taken from sperm whale stomachs were also considered. Up ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 79-111 : Author(s): Lubimova, T.G.
-
Maximum entropy reconstructions of krill distribution and estimates of krill density from acoustic surveys at South Georgia, 1996–2000
gráfi ca muestra la densidad de kril a lo largo de los transectos (el tamaño del círculo es ... statistical analyses. Résumé Ce document présente des reconstructions de l’entropie maximale (MaxEnt) de la ... répartition du krill et des estimations de la densité moyenne du krill dans deux rectangles d’étude ... (dimensions : 80 km × 100 km) au nord de la Géorgie du Sud. Les reconstructions sont effectuées à partir de ... line-transect acoustic survey data gathered in the boxes during austral summers from 1996 to 2000 ... 80 km transects in each box, providing about 1 600 density estimates per box. The MaxEnt technique ... × 0.5 km cells in each box, taking explicit account of the spatial relationship between densities in the ... observed data. Despite some very large interannual and regional differences in mean krill density, the ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 91–100 : Author(s): Wafy, M.H., A.S. Brierley, S.F. Gull and J.L. Watkins
-
Modelling catch and effort data using generalised linear models, the Tweedie distribution, random vessel effects and random stratum-by-year effects
par sa superfi cie pour obtenir des estimations générales annuelles normalisées de la capture par ... individuales por la extensión geográfi ca del estrato para calcular los totales anuales de captura por unidad ... La méthode standard actuelle servant à modéliser les données de capture et d’effort de pêche de la ... légine australe (Dissostichus eleginoides) des secteurs de la CCAMLR consiste à modéliser les rapports ... CCAMLR areas is to model the haul-by-haul ratios of catch to effort as the response variable in a ... . Tweedie distribution) for catch that, unlike lognormal or gamma distributions, admits zero values. In ... model (GLMM), in order to provide more efficient estimates of the standardised CPUE time series and more ... as a result of the imbalance in the number of hauls in the year-by-vessel cross-classification ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 59–80 : Author(s): Candy, S.G
-
Preliminary results of investigations of the Federal Republic of Germany on Notothenia rossii marmorata (Fischer, 1885) in January/February 1985
, N. rossii autour de la Georgie du sud est encore grandement touch6 par la p~che. Sa biomassc est ... the stock around South Georgia. RESULTATS PRELIMlliAIRES DES ETUDES DE LA RBPUBLIQUE FEDERALE D'ALLEMAGNE ... !'evaluation de la taille de Notothenia rossii auteur de la Georgie du sud et de l'Ile Elephant. Le but etait ... aussi d'€valucr le succCs Cventuel des mesurcs adoptees par la CCAMLR pour reconstruire le stock ... Notothenia rossii marmorata (Fischer, 1885) in January/February 1985 Abstract / Description: A bottom trawl ... survey carried out by FRV " Walther Hervig " in January/February 1985 was used to collect ... rebuild the stock around South Georgia might be successful. Although reported catches in recent years have ... probably still less than 10% of the pristine stock, Mean length in the catches has only slightly increased ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 33-57 : Author(s): Kock, K.-H.
-
The survivorship of rays discarded from the South Georgia longline fishery
sexo de las rayas, si bien estos factores no fueron signifi cativos. El porcentaje de supervivencia de ... in this study was restricted. Résumé Des expériences de survie à la remontée ont été menées sur 95 spécimens ... de Raja sp. anon. coupés des palangres à la surface de la mer par le navire de pêche chilien Isla ... Sofía en mai et juin 2003 pendant la saison de pêche à la légine dans la sous-zone 48.3. Il s'est ... sea surface by the Chilean fishing vessel Isla Sofía in May and June 2003 during the toothfish fishing ... season in Subarea 48.3. Capture depth had a consistently significant influence on the mortality of skates ... ) and the sex of rays also had some small influence on survivorship. Discard survivorship was 75% in ... waters shallower than 1 300 m (i.e. 1 200–1 300 m), 46% in waters 1 300–1 500 m, and 24% in waters ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 155–164 : Author(s): Endicott, M. and D.J. Agnew
-
Size compositions of males and females in the course of the life cycle of Euphausia superba
determination of adult kril1. Resume Les etudes anterieures n'ont nuUement fait cas des differences de la ... -IHI-ISI, CaMKI-I - HenpepbIBHaSI JII-IHI-ISI). Pa3MepHblti COCTaB HenOJIOB03peJIOrO KPl-lJISI ... distribution de frequences de tailles des populations d' Euphausia superba par sexe ou de sa variabilite ... captures commerciales sont analysees au cours de la saison de reproduction, a l'aide d'echantillons ... Paper Title: Size compositions of males and females in the course of the life cycle of Euphausia ... superba Abstract / Description: Earlier studies did not pay attention to differences in size composition ... of Euphausia superba populations by sex and its seasonal variability. In this paper variations in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 3–16 : Author(s): Makarov, R.R.
-
Research currently being undertaken by the Republic of South Africa on "dependent and related species" within the Antarctic marine ecosystem
principal ne las estudios que se est.in efectuando cs mejorar nuestra - GO - comprensi6n de la ... C HeA MOPCKHX 8KOCHCTeM. INVESTIGACIONES QUE LA REPUBLICA DE SUDAFRICA ESTA LL8VANDO A CABO ... e~ologia de los depredadores importantes (especialmente las focas y las aves marinas) y sus presas ... in the ConYent ion arl'ia and on the ~)ub-antarct I c isl an,js. These al I fa.ti tJnder the BUC,Pices ... seabirds) and their prey (especially krill and squid) in the Antarctic, and closely related marine ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 59-77 : Author(s): South Africa