Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo?
In this Thesis we presented the first steps in the study of the life history and population dynamics of Lychnorhiza lucerna as well as the possibilities of development of its fishery in Argentina. L. lucerna presented a metagenetic life cycle characteristic of most scyphozoans. Polyps reproduced asexually by the production of podocysts and polidisk strobilation. The combination of both types of asexual reproduction resulted in a high strobilation rates indicating that the abundance of medusae would strongly depend on polyps abundance and reproduction. The absence of ephyrae in the Río de la Plata estuary suggest that L. lucerna doest not complete its life cycle locally but medusae would be produced by polyps located northwards along the Uruguayan or Brazilian coasts. L. lucerna was capable of reproducing sexually as well as sexually within the summer range of temperature and salinity of the Río de la Plata estuary. However, this species could be limited by the availability of suitable substrates and the high sedimentation rates which would impede settlement of planulae and development of polyps. The occurrence of these medusae in the region was strongly seasonal and was restricted to the period between January and May. Highest abundances were reached among February and March at levels which could allow the development of a fishery. A product of intermediate quality. Nevertheless, the low cost of jellyfish processing techniques, the increasing demand of products from the consumer countries, and the economical needs of local fishermen, indicated that the development of a jellyfish fishery is possible in the future.
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Formato: | Theses and Dissertations biblioteca |
Idioma: | Spanish / Castilian |
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2008
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Materias: | Life history, Biomass, Estuarine fisheries, Life cycle, Population dynamics, Reproductive cycle, |
Acceso en línea: | http://hdl.handle.net/1834/3109 |
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dig-aquadocs-1834-31092021-05-19T06:24:41Z Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo? Life history and population dynamics of Lychnorhiza lucerna (Scyphozoa) ¿An alternative fishery resource? Schiariti, A. Mianzan, H.W. Life history Biomass Estuarine fisheries Life cycle Population dynamics Life cycle Life history Population dynamics Reproductive cycle Biomass Estuarine fisheries In this Thesis we presented the first steps in the study of the life history and population dynamics of Lychnorhiza lucerna as well as the possibilities of development of its fishery in Argentina. L. lucerna presented a metagenetic life cycle characteristic of most scyphozoans. Polyps reproduced asexually by the production of podocysts and polidisk strobilation. The combination of both types of asexual reproduction resulted in a high strobilation rates indicating that the abundance of medusae would strongly depend on polyps abundance and reproduction. The absence of ephyrae in the Río de la Plata estuary suggest that L. lucerna doest not complete its life cycle locally but medusae would be produced by polyps located northwards along the Uruguayan or Brazilian coasts. L. lucerna was capable of reproducing sexually as well as sexually within the summer range of temperature and salinity of the Río de la Plata estuary. However, this species could be limited by the availability of suitable substrates and the high sedimentation rates which would impede settlement of planulae and development of polyps. The occurrence of these medusae in the region was strongly seasonal and was restricted to the period between January and May. Highest abundances were reached among February and March at levels which could allow the development of a fishery. A product of intermediate quality. Nevertheless, the low cost of jellyfish processing techniques, the increasing demand of products from the consumer countries, and the economical needs of local fishermen, indicated that the development of a jellyfish fishery is possible in the future. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales Tesis (doctorado). Realizada en el INIDEP (Instituto Nacional de Investigación y Desarrollo Pesquero - Mar del Plata, Argentina) jellyfish fisheries, gelatinous plankton, Scyphozoa, Rhizostomeae, Lychnorhiza lucerna, pesquerías de medusas, plancton gelatinoso, historia de vida, ciclo de vida, dinámica de poblaciones, ciclo reproductivo, biomasa, pesquería de estuarios 2009-07-09T12:36:12Z 2009-07-09T12:36:12Z 2008 Theses and Dissertations http://hdl.handle.net/1834/3109 es 209 Atlántico Sudoccidental, Argentina, Buenos Aires, Río de la Plata |
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biblioteca |
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Europa del Oeste |
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language |
Spanish / Castilian |
topic |
Life history Biomass Estuarine fisheries Life cycle Population dynamics Life cycle Life history Population dynamics Reproductive cycle Biomass Estuarine fisheries Life history Biomass Estuarine fisheries Life cycle Population dynamics Life cycle Life history Population dynamics Reproductive cycle Biomass Estuarine fisheries |
spellingShingle |
Life history Biomass Estuarine fisheries Life cycle Population dynamics Life cycle Life history Population dynamics Reproductive cycle Biomass Estuarine fisheries Life history Biomass Estuarine fisheries Life cycle Population dynamics Life cycle Life history Population dynamics Reproductive cycle Biomass Estuarine fisheries Schiariti, A. Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo? |
description |
In this Thesis we presented the first steps in the study of the life history and population dynamics of Lychnorhiza lucerna as well as the possibilities of development of its fishery in Argentina. L. lucerna presented a metagenetic life cycle characteristic of most scyphozoans. Polyps reproduced asexually by the production of podocysts and polidisk strobilation. The combination of both types of asexual reproduction resulted in a high strobilation rates indicating that the abundance of medusae would strongly depend on polyps abundance and reproduction. The absence of ephyrae in the Río de la Plata estuary suggest that L. lucerna doest not complete its life cycle locally but medusae would be produced by polyps located northwards along the Uruguayan or Brazilian coasts. L. lucerna was capable of reproducing sexually as well as sexually within the summer range of temperature and salinity of the Río de la Plata estuary. However, this species could be limited by the availability of suitable substrates and the high sedimentation rates which would impede settlement of planulae and development of polyps. The occurrence of these medusae in the region was strongly seasonal and was restricted to the period between January and May. Highest abundances were reached among February and March at levels which could allow the development of a fishery. A product of intermediate quality. Nevertheless, the low cost of jellyfish processing techniques, the increasing demand of products from the consumer countries, and the economical needs of local fishermen, indicated that the development of a jellyfish fishery is possible in the future. |
author2 |
Mianzan, H.W. |
author_facet |
Mianzan, H.W. Schiariti, A. |
format |
Theses and Dissertations |
topic_facet |
Life history Biomass Estuarine fisheries Life cycle Population dynamics Life cycle Life history Population dynamics Reproductive cycle Biomass Estuarine fisheries |
author |
Schiariti, A. |
author_sort |
Schiariti, A. |
title |
Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo? |
title_short |
Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo? |
title_full |
Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo? |
title_fullStr |
Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo? |
title_full_unstemmed |
Historia de vida y dinámica de poblaciones de Lychnorhiza lucerna (Scyphozoa) ¿Un recurso pesquero alternativo? |
title_sort |
historia de vida y dinámica de poblaciones de lychnorhiza lucerna (scyphozoa) ¿un recurso pesquero alternativo? |
publishDate |
2008 |
url |
http://hdl.handle.net/1834/3109 |
work_keys_str_mv |
AT schiaritia historiadevidaydinamicadepoblacionesdelychnorhizalucernascyphozoaunrecursopesqueroalternativo AT schiaritia lifehistoryandpopulationdynamicsoflychnorhizalucernascyphozoaanalternativefisheryresource |
_version_ |
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