Consulta: creatorFacets:"Carreto, J.I."
Registros recuperados: 6
Data/hora: 09/06/2024 00:41:40

Comparative studies on paralytic shellfish toxin profiles of marine snails, mussels and an Alexandrium tamarense isolate from the Mar del Plata coast (Argentina)
Provedor de dados: 20
Autores: Carreto, J.I.; El Busto, C.; Sancho, H.; Carignan, M.O.; Yasumoto, T.; Oshima, Y.
Toxin composition of three species of marine gastropods Zidona angulata, Adelomedon brasiliana and Pachycymbiola brasiliana and the mussel Mytilus edulis, and an Alexandrium tamarense isolate (AMI)from the Mar del Plata coast, were determined by means of a sensitive and specific HPLC technique. Cultures of A. tamarense contain N-sulfocarbamoyl derivatives as major toxins. The next most abundant components were GTX1 neoSTX and GTX4. As minor components, unusual decarbamoyl toxins were detected. Saxitoxin was the lowest of the 10 detectable toxins. Comparison of toxins profiles revealed significant differences between the toxic composition of the dinoflagellate and that accumulated in the tissues of their primary and secondary consumers. In the mussel M....
Tipo: Journal Contribution
Palavras-chave: Marine molluscs; Toxicity; Toxicity; Http://aims.fao.org/aos/agrovoc/c_7826.
Ano: 1996
URL: http://hdl.handle.net/1834/1956

Algunas características del florecimiento del fitoplancton en el frente del Río de la Plata. I. Los sistemas nutritivos
Provedor de dados: 20
Autores: Negri, R.M.; Carreto, J.I.; Benavides, H.R.
During the spring (H-04/82: october 11-27, 1982)carried out by the Fishery Research Vessel "Dr.E.Holmberg", the distribution of temperature, salinity, nutrients concentration and photosynthetic pigments were studied at the "Rio de la Plata" maritime front. The presence of Sub-Tropical coastal waters in only station did not allow its characterization. Low Chlorophyll a concentration were noted, in association with scarce concentrations of nutrients and high Margalef index values.
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Abiotic factors; Water masses; Phosphates; Silicates; Nitrates; Chlorophylls; Estuarine front; Phytoplankton; Nitrates; Nutrients; Phosphates; Silicates; Chlorophylls.
Ano: 1986
URL: http://hdl.handle.net/1834/2041

Mortandad de caballa Scomber japonicus en la plataforma bonaerense (Mar Argentino)asociada a un florecimiento del dinoflagelado tóxico Alexandrium tamarense.
Provedor de dados: 20
Autores: Montoya, N.G.; Akselman, R.; Pájaro, M.; Perrotta, R.G.; Carreto, J.I.
Spring blooms of the toxic dinoflagellate Alexandrium tamarense in the Argentine sea produce shellfish toxicity through the parallytic shellfish poison (PSP)accumulation. The trace PSP content in the mackerel Scomber japonicus liver was previously demonstrated in the Buenos Aires province coastal region (Carreto et al, 1993a),and a certain capability to accumulate the toxins was suggested.However, it was up to spring 1993 when a great number of PSP intoxicated mackerels where detected for the first time in a wideshelf area off the Buenos Aires province. This area, known as 'El Rincón' (39°00'-40°30'S), has become a growing importance mackerel fishing ground during the last few years. A high PSP concentration was determined in those mackerels, being the...
Tipo: Journal Contribution
Palavras-chave: Toxicity; Algal blooms; Biological poisons; Stomach; Toxicity; Stomach; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_7422; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 1997
URL: http://hdl.handle.net/1834/1939

Pigmentos carotenoides del camarón Artemesia longinaris Bate (Crustacea, Decapoda, Penaeidae)
Provedor de dados: 20
Autores: Carreto, J.I.; Carignan, M.O.
Caronetoids from caparace and internal organs of Artemesia longinaris were isolated and identified. The following carotenoid pigments were found in caparace: luteine, tunaxanthin diester, astaxanthin monoester and free astaxanthin. A much greater variety of pigments was isolated from internal organs: Ó- doradexanthin, a fucoxanthin derivate, chlorophylls degradation products and various xanthophylls in trace amounts. These pigments are of dietary origin. In the natural environment, A.longinaris takes preformed astaxanthin from the diet and transfers it to body tissues.
Tipo: Journal Contribution
Palavras-chave: Pigments; Carotenoids; Absorption spectra; Pigments; Carotenoids; Http://aims.fao.org/aos/agrovoc/c_5875; Http://aims.fao.org/aos/agrovoc/c_1333.
Ano: 1984
URL: http://hdl.handle.net/1834/2048

Presencia de veneno paralizante de moluscos en higado de caballa de la región costera bonaerense
Provedor de dados: 20
Autores: Carreto, J.I.; Akselman, R.; Cucchi Colleoni, A.D.; Carignan, M.O.; Pájaro, M.
During november 1992 an intense bloom of the toxic dinoflagellate Alexandrium tamarense accurred in coastal waters from Mar del Plata, Argentina. Toxicity testing of Mytilus edulis populations of the region revealed high levels of paralytic shellfish poison. In order to study the possible PSP accumulation in mackerel (Scomber japonicus), mouse bioassay(AOAC) was performed in livers from individuals captured during December 1992. Liver extracts were lethal to mice; the sumptoms observed were typical of those caused by paralytic shellfish toxins. Although PSPS concentration is below the established limit for human consumption, it suggests that mackerel can accumulate PSP toxins from its food. On the basis of stomach content analysis of sampled mackerel and...
Tipo: Journal Contribution
Palavras-chave: Toxicity; Accumulation; Algal blooms; Toxicity; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 1993
URL: http://hdl.handle.net/1834/2572

Distribución del plancton a mesoescala en un área de reproducción de la anchoíta en la plataforma bonaerense
Provedor de dados: 20
Autores: Akselman, R.; Carreto, J.I.; Ramirez, F.C.
In order to determine the distribution patterns of phytoplanktonic and zooplanktonic species that constitute the main food of the argentine anchovy (Engraulis anchoita), a study was made within a coastal spawning area on meso-scaled space (approximately 7 miles between stations). It was observed the predominacne of the copepod Oithona helgolandica and copepodites stages of other small-sized species, thus inferring the preponderance of nauplii stages which constitute the main food of early anchovy larvae. A high spatial heterogeneity was found in the distrtibution of both phytoplanktonic and zooplanktonic communities. Phytoplankton showed a patchiness distribution both in horizontal and vertical directions. Diatoms, dinoflagellates and coccolithophoirids...
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Zooplankton; Trophic relationships; Population density; Horizontal distribution; Species diversity; Phytoplankton; Zooplankton; Species diversity; Population density; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1986
URL: http://hdl.handle.net/1834/2034