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Carlota Estrella - One of the best experts on this subject based on the ideXlab platform.
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observaciones sobre la biologia de octopus mimus cephalopoda octopoda en la costa peruana
Revista Peruana de Biología, 2013Co-Authors: Franz Cardoso, Piero Villegas, Carlota EstrellaAbstract:The Gould Octopus, Octopus mimus Gould, 1852 is widely distributed along the Peruvian coast and is target of an important Artisanal Fishery. The size-weight relationship in Ilo and Callao shows an allometric growth for both sexes. The females reach a spawning size at 14,3 cm of mantle length. That size was used to estimate a minimum weight of catch of 1 Kg. The diet was variable and it included crustaceans, mollusks, fish and echinoderms. Catches were six times higher during El Nino 1997– 1998 than El Nino 1982-1983. The present data is compared and discussed with those of Chile.
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observaciones sobre la biologia de octopus mimus cephalopoda octopoda en la costa peruana observations about the biology of octopus mimus cephalopoda octopoda in the peruvian coast
2004Co-Authors: Franz Cardoso, Piero Villegas, Carlota EstrellaAbstract:The Gould Octopus, Octopus mimus Gould, 1852 is widely distributed along the Peruvian coast and is target of an important Artisanal Fishery. The size-weight relationship in Ilo and Callao shows an allometric growth for both sexes. The females reach a spawning size at 14,3 cm of mantle length. That size was used to estimate a minimum weight of catch of 1 Kg. The diet was variable and it included crustaceans, mollusks, fish and echinoderms. Catches were six times higher during El Nino 1997– 1998 than El Nino 1982-1983. The present data is compared and discussed with those of Chile.
Omar Defeo - One of the best experts on this subject based on the ideXlab platform.
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the spatial dynamics of the whitemouth croaker Artisanal Fishery in uruguay and interdependencies with the industrial fleet
Fisheries Research, 2012Co-Authors: Sebastian Horta, Omar DefeoAbstract:Abstract The global fisheries crisis has critical socioeconomic impacts on small-scale fisheries. In addition, the crisis also exacerbates the conflicts and technological interdependencies between Artisanal and industrial fisheries. In the coastal zone of Uruguay, both the Artisanal and the industrial fleet target the whitemouth croaker Micropogonias furnieri (Desmarest, 1823). In this paper, we assess the spatial dynamics of the Artisanal fleet and evaluate technological interdependencies with the industrial fleet. To this end, information gathered from logbooks, vessel monitoring systems and monthly landing reports for five consecutive years was analyzed using a Geographic Information System (GIS). An Index of Fisheries Interdependencies (IFI) was developed to identify and measure the intensity of spatial overlap between the fleets. A strong intra-annual displacement of the Artisanal fleet was observed along the coast, as the fleet followed the migrations of the stock to the coastal spawning areas. The catches increased from April to July for both fleets, whereas an inverse trend was observed from October to January. This finding indicated the negative effects of the activities of the industrial fleet on the Artisanal catches. Declining Catch per Unit Effort (CPUE) trends and high IFI scores were detected at nursery and spawning areas and suggest early warning signals of stock overexploitation. Artisanal exclusive-use zones and spatio-temporal management windows are recommended to decrease the potential interdependencies between fleets.
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daily bioeconomic analysis in a multispecific Artisanal Fishery in yucatan mexico
Aquatic Living Resources, 2001Co-Authors: Jose Luis Cabrera, Omar DefeoAbstract:We describe daily allocation patterns of fishing effort (hookah diving) of the Artisanal fleet in San Felipe, Yucatan (Mexico), using catch, fishing effort, catch per unit of effort, variable costs, quasi rent and distance from port to four fishing grounds as performance variables. Two vessel categories were defined by the presence/absence of a LOng RAnge Navigation (LORAN) system. Hookah divers caught a daily average of four species in 95% of the trips, thus precluding the quantification of effective fishing effort allocated by species. Highest catches and quasi rent were mainly obtained on Thursdays and Fridays, coinciding with the highest catches of Octopus mayaand spiny lobster (making up 50% of the total economic revenue) on Fridays in 3 of the 5 weeks analysed. An upper ceiling of daily catch per diver occurred close to the weekend, suggesting a limited capacity in terms of handling time and diving hours, and also a catch level that fulfills daily economic expectations. Both LORAN and non-LORAN vessels preferred to work the nearest ground to port, in spite of higher yield and economic rent from more distant grounds. Nonlinear modelling of fishing effort allocation showed distance from port as the key decision factor. Generalized linear modelling (GLM) revealed significant effects of vessel type and fishing ground, with LORAN vessels having significantly higher catch rates and tending to allocate more effort to distant grounds than vessels without LORAN. GLM performed by species corroborated that Friday was the most productive day concerning spiny lobster and octopus. This day effect in the most valued species also suggests that pressure for higher economic benefits occurs before diminishing (Saturday) or ceasing (Sundays) fishing activities. © 2001 Ifremer/CNRS/Inra/IRD/Cemagref/Editions scientifiques et medicales Elsevier SAS fishing effort / short-term allocation / Artisanal Fishery / Yucatan
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Harvesting and economic patterns in the Artisanal Octopus mimus (Cephalopoda) Fishery in a northern Chile cove
Fisheries Research, 1998Co-Authors: Omar Defeo, Juan Carlos CastillaAbstract:Abstract We analyze intra- and inter-annual harvesting and economic patterns of the cephalopod Octopus mimus (pulpo) Artisanal Fishery at Caleta Coloso cove, Antofagasta, northern Chile, between 1991 and 1996. Information was collected daily, from 25 hookah divers that manually harvest pulpo in the subtidal along 29 km of coastline. Inter-annual fluctuations in catch, fishing effort, unit price and economic revenues increased from 1993 to 1996, when O. mimus landing and total revenues at Coloso were over 77 t and US$ 190 000, respectively. Contrary to the observed annual trend, the inverse intra-annual correlation between catch/fishing effort and price indicated short-term changes in price according to resource availability. A monotonic decreasing function between CPUE and price suggested a threshold catch rate economically feasible for harvesting. Inter-annual changes in the slope of the price–CPUE function indicated a marked increase in the demand of pulpo, jointly with warnings of stock depletion. We conclude that the O. mimus temporal Fishery patterns at Coloso are scale-dependent. Our results and general Fishery patterns in the Chilean pulpo Fishery suggest that a precautionary management scheme is urgently needed to prevent overfishing.
Juan Carlos Castilla - One of the best experts on this subject based on the ideXlab platform.
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distal impacts of aquarium trade exploring the emerging sandhopper orchestoidea tuberculata Artisanal shore gathering Fishery in chile
AMBIO: A Journal of the Human Environment, 2017Co-Authors: Juan Carlos Castilla, Sebastian Tapialewin, Karina Vergara, Christian De La Barra, Natalio Godoy, Stefan GelcichAbstract:Artisanal Fishery activities support the livelihoods of millions of people worldwide, particularly in developing countries. Within these fisheries, distal global drivers can promote switching between alternative target resources. These drivers can promote the rapid development of new, unregulated and previously unexploited fisheries that pose a threat to the sustainability of ecosystems. In this paper, we describe a new Artisanal shore gathering activity that targets a previously unexploited resource: the sandhopper (Orchestoidea tuberculata). The activity is driven by aquarium trade demand for food. We used mixed methods to describe the activity, assessed basic socio-economic incentives, and estimated Catches per Unit Effort. Results show that the sandhopper plays an important role for the livelihoods of shore gatherers engaged in the activity. Gatherers have adapted and developed two main extraction methods with different degrees of investment and extraction rates. Furthermore, gatherers have developed local knowledge regarding the ecology and management of the resource. Results show that economic incentives can motivate a rapid expansion of this unregulated activity. Future research gaps and management options to address the development of this Fishery are discussed in light of these findings.
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Harvesting and economic patterns in the Artisanal Octopus mimus (Cephalopoda) Fishery in a northern Chile cove
Fisheries Research, 1998Co-Authors: Omar Defeo, Juan Carlos CastillaAbstract:Abstract We analyze intra- and inter-annual harvesting and economic patterns of the cephalopod Octopus mimus (pulpo) Artisanal Fishery at Caleta Coloso cove, Antofagasta, northern Chile, between 1991 and 1996. Information was collected daily, from 25 hookah divers that manually harvest pulpo in the subtidal along 29 km of coastline. Inter-annual fluctuations in catch, fishing effort, unit price and economic revenues increased from 1993 to 1996, when O. mimus landing and total revenues at Coloso were over 77 t and US$ 190 000, respectively. Contrary to the observed annual trend, the inverse intra-annual correlation between catch/fishing effort and price indicated short-term changes in price according to resource availability. A monotonic decreasing function between CPUE and price suggested a threshold catch rate economically feasible for harvesting. Inter-annual changes in the slope of the price–CPUE function indicated a marked increase in the demand of pulpo, jointly with warnings of stock depletion. We conclude that the O. mimus temporal Fishery patterns at Coloso are scale-dependent. Our results and general Fishery patterns in the Chilean pulpo Fishery suggest that a precautionary management scheme is urgently needed to prevent overfishing.
Culioli Jean-michel - One of the best experts on this subject based on the ideXlab platform.
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A Typical Mediterranean Fishery and an Iconic Species: focus on the common Spiny Lobster (Palinurus elephas, Fabricius, 1787) in Corsica
'Juniper Publishers', 2020Co-Authors: Marengo Michel, Theuerkauff Dimitri, Patrissi Michela, Doutreloux Nine, Leduc Michèle, Dijoux Jessica, Duchaud Coralie, Picot Cédric, Agniel Rémy, Culioli Jean-michelAbstract:International audienceThe common spiny lobster (Palinurus elephas, Fabricius, 1787) is an iconic species of the Mediterranean Sea. Despite the existence of dataon the Artisanal Fishery of P. elephas in the Mediterranean Sea and particularly in Corsica, knowledge on the biology and life history traits of thisiconic species is still lacking. This paper identifies the main gaps in current knowledge and suggests future directions of research to answer thesefundamental questions, which are currently unanswered
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A Typical Mediterranean Fishery and an Iconic Species: focus on the common Spiny Lobster (Palinurus elephas, Fabricius, 1787) in Corsica
2020Co-Authors: Marengo Michel, Theuerkauff Dimitri, Patrissi Michela, Doutreloux Nine, Leduc Michèle, Dijoux Jessica, Duchaud Coralie, Picot Cédric, Agnel Remy, Culioli Jean-michelAbstract:The common spiny lobster (Palinurus elephas, Fabricius, 1787) is an iconic species of the Mediterranean Sea. Despite the existence of data on the Artisanal Fishery of P. elephas in the Mediterranean Sea and particularly in Corsica, knowledge on the biology and life history traits of this iconic species is still lacking. This paper identifies the main gaps in current knowledge and suggests future directions of research to answer these fundamental questions, which are currently unansweredPeer reviewe
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A Typical Mediterranean Fishery and an Iconic Species: focus on the common Spiny Lobster (Palinurus elephas, Fabricius, 1787) in Corsica
'Juniper Publishers', 2020Co-Authors: Marengo Michel, Theuerkauff Dimitri, Patrissi Michela, Doutreloux Nine, Leduc Michèle, Dijoux Jessica, Duchaud Coralie, Picot Cédric, Agnel Remy, Culioli Jean-michelAbstract:peer reviewedaudience: researcher, professional, student, popularizationThe common spiny lobster (Palinurus elephas, Fabricius, 1787) is an iconic species of the Mediterranean Sea. Despite the existence of data on the Artisanal Fishery of P. elephas in the Mediterranean Sea and particularly in Corsica, knowledge on the biology and life history traits of this iconic species is still lacking. This paper identifies the main gaps in current knowledge and suggests future directions of research to answer these fundamental questions, which are currently unansweredPO FEAMP 2014-20, Mesure 2
Violeta Valdivieso - One of the best experts on this subject based on the ideXlab platform.
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cultivo experimental de octopus mimus gould 1852 en el peru
Revista Peruana de Biología, 2014Co-Authors: Paul Baltazar, Pilar Rodriguez, William Rivera, Violeta ValdiviesoAbstract:Octopus mimus Gould, 1852 is an important benthic resource in the Peruvian Artisanal Fishery and is always in demand on the international market. Bibliographic antecedents about the culture of this species for Southeastern Pacific are few. The present study was made in the Center of Aquaculture "La Arena", Casma, Peru. The experiments were carried out in fiber glass tanks and long-line in the sea. Feeding was made with fish, crustaceans and mollusk and also was tested with wet pellets ("piensos humedos"), the last one being accepted after an starvation period. For copulation the biggest specimens were chosen (1,5 kg). Differences were observed in growth for those reared in the pools (185 and 369 g/month), the growth rate was greater than that of those in the lines of culture (120,6 g/month). The maximum paralarvae survival was 17 days to temperatures of 21 to 22 oC; they were fed with nauplios of brine shrimp.
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cultivo experimental de octopus mimus gould 1852 en el peru experimental culture 01 octopus mimus gould 1852 in peru
2000Co-Authors: Paul Baltazar, Pilar Rodriguez, William Rivera, Violeta ValdiviesoAbstract:Octopus mimus Gould, 1852 is an important benthic resource in the Peruvian Artisanal Fishery and is always in demand on the international market. Bibliographic antecedents about the culture 01 this species for Southeastern Pacific are few. The present study was made in the Center of Aquaculture "La Arena", Casma, Peru. The experiments were carried out in fiber glass tanks and long-line in the sea. Feeding was made with fish, crustaceans and mollusk and al so was tested with wet pellets ("piensos humedos"), the last one being accepted after an starvation periodo For copulation the biggest specimens were chosen (1,5 kg). Differences were observed in growth for those reared in the pools (185 and 369 g/month), the growth rate was greater than that of those in the lines of culture (120,6 g/month). The maximum paralarvae survival was 17 days to temperatures of 21 to 22 oC; they were fed with nauplios of brine shrimp.
