|
|
|
|
|
| Ercoli, R.; Mituhasi, T.; Izzo, A.; García, J.C.; Bartozzetti, J.D.. |
| The Patagonian grenadier Macruronus magellanicus fishery reached the maximum exploitation in the argentine fishery in 1988 with a catch of 154,960 t, decreasing gradually in the current decade. Statistical data confirm this trend and consider a total catch of22,796,3 t for 1995. The regulations establish a minimum of 120 mm inside codend mesh size for demersal species in Argentine sea. Hoki,in relation to the fishing gear, shows a semipelagic behaviour, but no selectivity trials were made at the moment. The present report presents the selectivity results obtained with rough bottom trawl Engel net with a double braided PE twine codend and 120 mm mesh size.Except the codend, it is the gear normally used by INIDEP to evaluate demersal resources. The logistic... |
| Tipo: Journal Contribution |
Palavras-chave: Mesh selectivity; Bottom trawls; Gadoid fisheries. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/5785 |
| |
|
| |
|
| |
|
|
| Ercoli, R.; Salvini, L.; Garcia, J.C.; Izzo, A.; Roth, R.R.; Bartozzetti, J.D.. |
| This Technical Manual has been developed to frame, assemble and apply the single grid sorting device (DEJUPA). It is addressed to professionals, technicians in fishing gears, skippers, owners and fishermen. The Manual presents three DEJUPA sizes in function of the main engine power: less than 300 HP, between 300 and 800 HP and more than 800 HP. |
| Tipo: Journal Contribution |
Palavras-chave: Trawl nets; Gear selectivity. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/2539 |
| |
|
|
| Izzo, A.; Isla, M.; Salvini, L.; Bartozzetti, J.D.; Garcia, J.C.; Roth, R.R.; Prado, L.; Ercoli, R.. |
| This paper deals with the design and application of different fishing gears tested in the Beagle Channel (Tierra del Fuego, Argentina) with the supervision of the technical personnel of INIDEP Fishing Gear Group, the support of the General Directorate of Natural Resources (known today as SRNyAH) of Tierra del Fuego, Antártida e Islas del Atlántico Sur Province and the participation of local fishermen. Activities started as a result of an agreement between the INIDEP and the SRNyAH ratified in 1994. The fishing gear tested, which consist of two paired midwater trawl nets, a gill net, a surrounding net, a bottom lingline, a pot for kingklip and a line of octopus traps may be used in vessels ranging from 30 to 120 HP in coastal waters, channels and inland... |
| Tipo: Journal Contribution |
Palavras-chave: Gillnets; Trap nets; Line fishing; Trawl nets; Artisanal fishing; Gillnets; Line fishing; Http://aims.fao.org/aos/agrovoc/c_32431; Http://aims.fao.org/aos/agrovoc/c_4349. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/2538 |
| |
|
|
| Ercoli, R.; Garcia, J.C.; Aubone, A.; Salvini, L.; Bertelo, R.. |
| This work reports on the inter rod distance in a single sorting grid adapted for the escape of hake juveniles. A good performance of the device was reported due to the DEJUPA trials carried out in April 1997. In may 1998 a new survey with DEJUPA was carrie out with 30 mm, 33 mm, and 40 mm separation distance bars, in order to optimise the escape of the species at first length maturity (35 cm). Selectivity curves with maximum likelihood method were obtained for each inter rod distance being the length at 50. (L50) 29, 32 and 37 respectively. A weighd lineal regression (Feasible General Squares Model) between L50 and inter rod distance was fitted from each L50 estimated variance. An estimation of 37 mm inter rod distance for L50=35 cm total length was... |
| Tipo: Journal Contribution |
Palavras-chave: Gear selectivity; Bottom trawls; Juveniles; Juveniles; Http://aims.fao.org/aos/agrovoc/c_25393. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/2536 |
| |
|
| |
|
|
| Ehrhardt, N.M.; Ercoli, R.; Garcia, J.C.; Bartozzetti, J.D.; Izzo, A.. |
| The hake, Merluccius hubbsi, fishery is the most important amongst the argentinean demersal fisheries. Fishery management schemes have been adopted to control high discard levels of undersized fish historically observed in the fishery. Controls have consissted in establishing closed areas to fishing and implementation of minimum mesh size in bottom trawls to allow escapement of fish less than 33 cm in length. Offical fishery regulations establish a 120 mm inside codend mesh size in all hake traws. This work reports on the dynamics of hake selection in bottom trawls as a function of the relative abundance of the resource as well as loading levels imposed on the fishing gear. The analyses include the response to selection by square mesh panels attached to... |
| Tipo: Journal Contribution |
Palavras-chave: Mesh selectivity; Trawl nets; Bottom trawls; Discards. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/1969 |
| |
|
|
| Maeda, H.; Ercoli, R.; Fukada, K.; Garcia, J.C.. |
| Bathymetric changes in groundfish catch composition are analyzed, on the basis of routine reports of 106 bottom longline strings. The project was conducted from 12 December 1986 to 29 November 1987, covering areas from coastal waters to the outer shelf of the continental shelf off Argentina from 36° to 55°S. As a preliminary step to the analysis, the validity of each factor as probable explanatory variable in each area, was analyzed with consideration as to their range and variation. Obtained results show that the kingclip (Genypterus blacodes), a main objective of the project, could become one of the most profitable target species of the high-sea bottom longline, in areas along the outer edge of the continental shelf, at bottom depths slightly below 200... |
| Tipo: Journal Contribution |
Palavras-chave: Longlining; Experimental fishing; Demersal fisheries; Demersal fisheries; Http://aims.fao.org/aos/agrovoc/c_2173. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/1930 |
| |
|
|
|
