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| Registros recuperados: 14 | |
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| Cordo, H.D.. |
| Catch per unit of effort (CPUE)analysis of the Argentine surimi fleet is a routine work to estimate abundance indices of southern blue whiting Micromesistius australis. Several analysis of this fishery suggest that, as of the years when intensive fishing by foreign and national fleets started, the resource has suffered a marked decline. When calculating the CPUE it is common practice to take into acount only trips and fishing operations with high catches of the target species fishing operations directed to other species are not considered to avoid underestimations. Therefore, in order to include a percentage of catch of the analyzed species higher than a subjective value, available data are filtered. However, because only operations with high yield are... |
| Tipo: Journal Contribution |
Palavras-chave: Catch/effort; Yield; Commercial fishing; Overfishing; Stock assessment; Stock assessment; Overfishing. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/1584 |
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| Pérez, M.; Massa, A.M.; Cordo, H.D.. |
| Patagonian smoothhound (Mustelus schmitti) is one of the predominant cartilaginous fishes of the Argentine Sea (SW Atlantic Ocean). It is caught, mainly, in the coastal multispecific fishery with nearly other 30 bony and cartilaginous species. The group is known as ‘variado costero’. In this work the smoothhound abundance indices (CPUE) and standardized efforts for the 1992-2008 period in the area between 34~’S-42~’S were estimated. The General Lineal Model (GLM) and data derived from the argentine commercial fleet were used. Other aspects that could affect estimates and trends of the annual indices were also analyzed. Mean CPUE values estimated with the GLM, considered as annual standardized abundance indices, show an increasing trend as of 2000; the... |
| Tipo: Journal Contribution |
Palavras-chave: Abundance; Catch/effort; Coastal fisheries; Statistical analysis; Mustelus schmitti; Marine environment. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4881 |
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| Wöhler, O.C.; Hansen, J.E.; Giussi, A.R.; Cordo, H.D.. |
| Period 1985-2001. A stock assessment of Patagonian hoki of the Southwest Atlantic was carried out by using data from the years 1985-2001. A cohort analysis, fitted with some survey abundance indices was used in an adaptive conceptual framework. Simulation trials were performed to project the evolution of the fishery, to evaluate the risk of over-fish the stock under different exploitation levels, and to estimate Biologically Acceptable Catches (BAC). Both total biomass and spawning stock biomass showed increasing trends resulting from four strong year classes (1993, 1995, 1996 and 1998). Total biomass at the beginning of 2001 was estimated to be 2.5 million tons, and spawning stock biomass at the spawning time (August) was estimated to be around 1.28... |
| Tipo: Journal Contribution |
Palavras-chave: Stock assessment; Fishery management; Biomass; Risks; Demersal fisheries; Stock assessment; Fishery management; Biomass; Demersal fisheries; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2173. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/2525 |
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| Wöhler, O.C.; Giussi, A.R.; García de la Rosa, S.B.; Sánchez, M.F.; Hansen, J.E.; Cordo, H.D.; Alvarez Colombo, G.L.; Incorvaia, I.S.; Reta, R.; Abachián, V.E.. |
| An assessment survey on the austral fish was carried out during the summer 1997 on both the shelf and slope off southern Argentina. The cruise covered 101,508 nm2 between 45° and 54° 30'S and depths between 50 and 400 m. The survey did not include the area controlled by the United Kingdom. Considering the total area as an undivided stratum, a random sampling was used to estimate demersal fish biomass and a delta distribution-based model to evaluate mean densities. Out of the forty five species caught 28 were bony fish and 17 elasmobranch. Four cephalopod mollusc species were also identified. A biomass of 3.2 million tons (CI(95o/o): 1.90 - 6.06 millions) proved that longtail hake was the most abundant resource within the region followed by common hake... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Fishery surveys; Biomass; Population structure; Feeding; Parasitism; Environmental conditions. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/5782 |
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| Registros recuperados: 14 | |
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