Consulta: subjectFacets:"Http://aims.fao.org/aos/agrovoc/c_7826"
Registros recuperados: 11
Data/hora: 29/05/2024 04:48:02

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

Aplicación estadística en los bioensayos de toxicidad con sedimentos extraído del Estero Salado, canal de acceso al Puerto Marítimo de Guayaquil
Provedor de dados: 20
Autores: Villamar, F.
With the purpose of proving and determining in a short term the impact of the dredged material that can be caused by the organisms that inhabit the marine-estuary ecosystem, was performed toxicity bioassay of the sediment extracted from the bottom of the Salado Estuary. This sediment obstructs the access channels of the Marítime Port of Guayaquil. For this bioassay, was used white shrimp larvae of the species Litopenaeus vannamei, a commercially important organism that depends for its food on the organic detritus coming from the sediment and the column of estuary water in the studied area. The results obtained were analyzed applying the graphic arithmetic method and statistical analysis, through which it was determined that there is a direct relation...
Tipo: Journal Contribution
Palavras-chave: Bioassays; Toxicity; Marine organisms; Sediments; Statistical analysis; Kurtosis; Dredged samples; Bioassays; Toxicity; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_15731; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2002
URL: http://hdl.handle.net/1834/2257

Los Bioensayos de Toxicidad en Sedimentos Marinos
Provedor de dados: 20
Autores: Carballo Hondal, O.; Arencibia Carballo, G.; Concepción, J.; Isla Molleda, M.
Many organic and in organic contaminants originated from human activities are deposited and concentrated in aquatic sediments. The purpose of this review article is to analyze and discuss, the objectives, procedures and applications of bioassays on the triad of marine sediments, aiming at a reflection on the possibility of implementing regulations on the environmental monitoring of these studies in our country, so as to improve the environmental quality and its management on coastal zones. The main objective is to highlight the understanding of the adequate application and interpretation of bioassays. A summary of reports is presented, knowledge and analysis concerning marine sediments including, the chemical analysis, the direct determination of...
Tipo: Journal Contribution
Palavras-chave: Toxicity; Sediments; Bioassays; Toxicity; Bioassays; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_15731.
Ano: 2010
URL: http://hdl.handle.net/1834/3670

Impact saisonnier de l'environnement sur la structure génétique de trois populations de ruditapes decussatus dans l'ecosystème lagunaire de Bizerte (Tunisie)
Provedor de dados: 20
Autores: Fassatoui, CH.; Mdelgi-Lasram, E.; Moraga, D.; Romdhane, M.S.
في محاولة لتقييم تأثيرالاضطرابات التي يمكن ان تغير التركيبه الجينيه للمحار ببحيره بنزرت، اجريت تحاليل جينيه على عينات من ثلاثة مجموعات. و قد بينت النتائج تواجد علاقة متبادله بين فقدان التنوع ومستويات métallothionéines في خياشيم المحار التي  يمكن ان تكون مرتبطة مع وجود تدرج الانسياب المحمل بالمعادن الثقيلة بين مناطق منزل جميل،فروة والشعرة.
Tipo: Journal Contribution
Palavras-chave: Ruditapes decussatus; Clam culture; Environmental effects; Environmental impact; Heavy metals; Metallothioneins; Population genetics; Toxicity; Environmental impact; Heavy metals; Population genetics; Toxicity; Biomarkers of exposure (organisms); Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_34326; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_36994.
Ano: 2007
URL: http://hdl.handle.net/1834/4258

Metodología de bioensayos y efectos tóxicos de algunos contaminantes sobre organismos de interés ecológico pesquero
Provedor de dados: 20
Autores: Suárez Álvarez, G.
Este trabajo trata de presentar los efectos tóxicos de cuatro posibles contaminantes de la plataforma cubana, un plaguicida órgano clorado el DDT y 3 metales, el cromo, el cobre y el plomo, sobre postlarvas de langosta P. argus y el camarón P. notialis. Persiguiendo un triple propósito en sus objetivos, presentar de una forma cómoda, con fines didácticos la resolución de los tres métodos de trabajo adoptados internacionalmente para evaluar la toxicidad, el método gráfico semi logarítmico, rutinario o estándar, el método de los Probits de Bliss y la modificación de Licthfield y wilcoxon, así como analizar de dichas metodologías cual es la más adecuada para la evaluación de los efectos de cualquier contaminante con mayor precisión estadística y conocer los...
Tipo: Theses and Dissertations
Palavras-chave: Toxicity; Heavy metals; Metals; Toxicity; Heavy metals; Metals; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_29036.
Ano: 1996
URL: http://hdl.handle.net/1834/2610

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

Toxicidad de nauplios de Artemia franciscana a dos piretroides de uso comercial
Provedor de dados: 20
Autores: Arencibia Carballo, G.; Tizol Correa, R. A.; Rodríguez, R. O.
Se presentan los resultados de la determinación de la LC50  para 24 h de exposición mediante una prueba de toxicidad aguda en Artemia franciscana. Se caracterizó una cepa, la cual según los resultados se evaluó de primera calidad y se aplicaron criterios importantes para el empleo de sus nauplios en dichas pruebas. Se determinó la toxicidad de los insecticidas piretroides, cipermetrina y permetrina reportándose los valores de 4,72 y 26,7 μg/mL de CL50  para 24 h respectivamente. El protocolo experimental descrito es apropiado para evaluar el efecto tóxico de compuestos químicos. Los resultados en el uso de pruebas con Artemia demuestran su versatilidad práctica y economía para la utilización en las evaluaciones de los mismos tóxicos. Estos experimentos...
Tipo: Journal Contribution
Palavras-chave: Toxicity; Toxicity; Http://aims.fao.org/aos/agrovoc/c_7826.
Ano: 2010
URL: http://hdl.handle.net/1834/4116

Marea roja en el Canal de Beagle
Provedor de dados: 20
Autores: Vinuesa, J.H.
Tipo: Journal Contribution
Palavras-chave: Red tides; Toxicity; Toxicity; Http://aims.fao.org/aos/agrovoc/c_7826.
Ano: 1993
URL: http://hdl.handle.net/1834/3683

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

Biology and toxicity of the pufferfish Lagocephalus sceleratus (GMELIN, 1789) from  the Gulf of Suez
Provedor de dados: 20
Autores: El-Ganainy, A. A.; Sabrah, M. M.; Zaky, M. A.
Some biological aspects of the pufferfish Lagocephalus sceleratus were studied and correlated with the toxicity of the fish. A sample of 176 fish with total lengths ranging from 18.5 to 78.5 cm were collected from commercial catches at the Attaka fishing harbor between October 2002 and June 2003. Length weight regression parameters for males, females and all individuals were estimated. Modal progression analysis output indicates ten distinct age groups. The parameters of the von Bertalanffy's growth model were L∞ = 81.1 cm and K = 0.26 per year. The overall sex ratio of males to females was 1: 1.3. The spawning takes place during summer and the size at which 50% of fishes are mature is 42.1 cm for males and 43.3 cm for females. Analysis of the diet...
Tipo: Journal Contribution
Palavras-chave: Environmental Studies; Reproduction; Toxicity; Growth; Fish; Toxicity; Growth; Reproduction; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 2006
URL: http://hdl.handle.net/1834/1452

Determinación de la toxicidad en dispersantes de petróleo mediante bioensayos para calcular el CL50
Provedor de dados: 20
Autores: Villamar, F.; Tapia, M.E.
Este tipo de experimentación se ha centrado en la estimación de la Concentracion Letal Media (CL50), que significa el cincuenta por ciento de organismos muertos en un tiempo determinado.
Tipo: Journal Contribution
Palavras-chave: Toxicity; Bioassays; Detergents; Mortality; Dispersants; Phytoplankton; Toxicity; Bioassays; Detergents; Phytoplankton; Mortality; Dispersants; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_15731; Http://aims.fao.org/aos/agrovoc/c_10349; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_32426.
Ano: 2004
URL: http://hdl.handle.net/1834/2319