A multi-disciplinary approach incorporating otolith chemistry, age data and numerical Lagrangian particle simulations indicated a single, self-recruiting population of Antarctic toothfish (Dissostichus mawsoni) in the Southeast Pacific Basin (SPB) and Ross Sea, with a life history structured by the large-scale circulation. Chemistry deposited prior to capture along otolith edges demonstrated strong environmental heterogeneity, yet the chemistry in otolith nuclei, deposited during early life, showed no differences. Age data showed only adult fish in catches on the Pacific-Antarctic Ridge in the SPB; and structuring of life stages consistent with transport pathways from the northern Ross Sea. Lagrangian particle simulations predicted that early life stages following the flow in the SPB would be transported to areas in the Ross Sea where juveniles are caught; whereas, the circulation would facilitate adult movement along the shelf slope and back into the SPB where spawning adults are caught. These results suggest that: successfully spawning fish spend only a part of their adult life history in the Ross Sea; areas in the eastern Ross Sea contribute disproportionately to the spawning population; and areas in the southwestern Ross Sea may supply fisheries in the southern Indian Ocean.
Abstract:
In 2010, POKER Biomass survey was undertaken at Kerguelen Islands (Division 58.5.1) to collect information of all the fish species including the mackerel icefish, Champsocephalus gunnari. Data from this random stratified trawl survey, added to the previous results of 2006, was used for a short term assessment of C. gunnari on Kerguelen EEZ. The standard CCAMLR methods were used to provide potential yields for the 2010/2011 and 2011/2012 seasons even if fishery doesn’t occur presently. A catch limit tonnes was simulated till the 2011/2012 season.
Abstract:
In accordance with decision of CCAMLR Scientific Committee in 2010 and in 2011 years Russian Federation was conducted research program in SSRU 88.2 A. In seasons 2010/2011 and 2011/2012 Russian vessel “Chio Maru 3” (“Antei” Ltd.) has been conducted research fishing of toothfish. The primary objective of the works in the SSRU was estimation of toothfish`s distribution density and carrying out of tagging. Obtained results shows that investigated area is potentially advantageous for fishing and could be recommended for exploratory fishing under CCAMLR regulations. Calculation results shows that biomass of toothfish in SSRU 88.2 A in significant and makes up from 2611.3 to 3112.3 t, which allows the removal of approximately 280 tons (at 10% operating level) each year without negative effect to the population of toothfish. We recommend 286 tons as value of limit of the allowable catch.
Abstract:
El presente documento sintetiza las observaciones francesas de la pesca ilegal durante el año pasado.
El área geográfica que cubre este informe comprende la Subárea estadística 58.6 y las Divisiones 58.5.1 y 58.5.2 (que incluyen las ZEE de las islas Crozet, Kerguelén y Heard y McDonald), las Divisiones estadísticas 58.4.3, 58.4.4 (bancos BANZARE, Elan, Lena y Ob) y la Subárea 58.4.1. También se mencionan los barcos incluidos en la lista negra de la CCRVMA y que han sido avistados fuera del Área de la Convención durante la presente temporada.
Las poblaciones de peces en las ZEE de las islas Kerguelén y Crozet están ahora protegidas, como se muestra en el informe de la campaña POKER 2 de investigación pesquera (2010). Aunque la extracción INDNR en la ZEE de Crozet y Kerguelén es prácticamente cero, la pesca INDNR continúa realizándose en las aguas internacionales del Área de la CCRVMA. En el área tratada en este documento, las actividades de pesca INDNR permanecen en niveles similares a los registrados en 2011.
El precio de venta de la austromerluza ha alcanzado máximos históricos durante esta temporada, incrementando así los incentivos para la pesca INDNR, de manera que varias veces por año se observan actividades de pesca INDNR que duran de una a cinco semanas en el borde de las plataformas continentales fuera de las ZEE francesas. En esta temporada, la flota de pesca INDNR nuevamente se ha concentrado en los bancos BANZARE y Elan (División estadística 58.4.3) como también en los montes submarinos más dispersos (Ob y Lena), y ocasionalmente en los límites de las ZEE de Crozet, Kerguelén y Heard (arrecife Lameyne, espolón Gallienni, monte submarino Williams y emersión continental Del Cano). Se han observado actividades de pesca INDNR dirigidas a la austromerluza antártica en áreas sobre los montes submarinos a lo largo del borde del continente o en el límite del hielo que son accesibles en verano. Todos los barcos de pesca INDNR observados utilizaron redes de enmalle.
La obtención de información sobre la identidad de los capitanes de barco y patrones de pesca o sobre las nacionalidades de las tripulaciones de los barcos avistados es cada vez más difícil. Bien podría ser que los miembros de las tripulaciones que menos cooperan durante los interrogatorios sean ciudadanos de Estados miembros de la CCRVMA. Se ha observado que la presencia de barcos de patrulla que enarbolan la insignia de la CCRVMA en alta mar no es suficiente para disuadir a los barcos de pesca INDNR de continuar con sus actividades.
Abstract:
En este documento de trabajo, Francia presenta a la CCRVMA un informe de su raciocinio y del trabajo que está siendo realizado para asistir en el establecimiento de nuevas Áreas Marinas Protegidas en sus Zonas Económicas Exclusivas de Kerguelén y Crozet como también en la Zona del Mar de Dumont d’Urville.
There is no abstract available for this document.
Abstract:
The present work includes results of seven-year own author’s research and presents generalised knowledge about distribution and biology of the antarctic toothfish in different sectors of the Antarctica.
Abstract:
In 2011 and 2012 in Subarea 88.3 research fishing for toothfish has been conducted by Russia. In 2011 fishing was carried out by Russian longliner “Sparta” out and in 2012 it was longliner “Chio Maru 3”. Research program was performed by scientific observers from VNIRO (Moscow, Russia) and YugNIRO (Kerch, Ukraine). Totally, during the work period 44 longlines were set at a depth from 625 to 2336 m. Total number of set hooks amounted 171096. In 2011 research fishing covered SSRU B, C and D, and in 2012 ice conditions were much worse and longlines were set only in SSRU C. Collected in research fishing data contributes to the achievement of the main objectives of research for the data-poor area: estimate of number index, evaluation of fishing capacity of Subarea 88.3, preparation of hypotheses about the ratio of fish in the area and the total stock as well as studying of biological parameters associated with productivity (SC-CCAMLR-XXX/5, par. 2.26-2.29). Toothfish's biomass was calculated by the accepted in SC-CCAMLR-XXX/5 p.2.40 (ii) formula. Value of toothfish`s stock by SSRUs and all details of stock assessment methods are described in the present work.