Alicia Viviana Sastre - Profile on Academia.edu (original) (raw)

Papers by Alicia Viviana Sastre

Continuing southern right whale mortality events at Península Valdés, Argentina

… Document SC/61/ …, 2009

... Riacho, Bengoa, Larralde; Rodolfo and Adriana Hamond, Jaime Groizard (Aluar), Peter Domínguez... more ... Riacho, Bengoa, Larralde; Rodolfo and Adriana Hamond, Jaime Groizard (Aluar), Peter Domínguez and Nestor Basso, Javier Catania, Jorge Contreras, Alejandro Balado, Chochi Owen, Verónica Martínez, Pamela Quiroga, Belén Argüelles, Horacio García, Natalia Quintana ...

Uncovering aquatic diversity patterns in two Patagonian glacial lakes: does habitat heterogeneity matter?

Aquatic Sciences

Distribution of the invasive diatom Didymosphenia geminata in Patagonia Argentina

Distribución geográfica de la diatomea invasora Didymosphenia geminata en cuerpos de agua andino-patagónicos de Argentina

Didymosphenia geminata in Argentina

Harmful Marine Microalgae Guide of the Chubut Province Coastal Waters (Patagonia, Argentina)

Ultrastructure of Thalassiosira bioculata var. rariprora in the Argentine Sea slope. First record for the Southern Hemisphere

Fatty acids and contaminants in edible marine gastropods from Patagonia

Journal of the Marine Biological Association of the United Kingdom, 2017

Edible marine gastropods are consumed in northern Patagonia without regulations or knowledge of n... more Edible marine gastropods are consumed in northern Patagonia without regulations or knowledge of nutritional composition and food quality. We determined total lipids (TL), fatty acid (FA), paralytic shellfish poison (PSP) and metal contamination in six edible marine gastropods:Buccinanops globulosus,B. cochlidium,Trophon geversianus,Odontocymbiola magellanica,Tegula patagonicaandNacella magellanica. TL was lowest in the foot (0.29–0.56%) and maximum in organs (1.43–3.2%), presenting less TL than other edible species around the world. Saturated FA were similar to other consumed marine gastropods worldwide and dominant in all species studied (33.26–48.19%), while monounsaturated FA reached about 30% only in 2 species, but did not exceed 18% in the other species. Polyunsaturated FA reached up to 23.77%, but generally did not exceed 14%. Highly unsaturated FA (AA, EPA and DHA), reached about 27%. The dominant FA was palmitic acid (0.217 to 2.43 µg mg−1).Differences in FA could be related...

Harmful Algae, 2017

The gulfs that surround Península Valdés (PV), Golfo Nuevo and Golfo San José in Argentina, are i... more The gulfs that surround Península Valdés (PV), Golfo Nuevo and Golfo San José in Argentina, are important calving grounds for the southern right whale Eubalaena australis. However, high calf mortality events in recent years could be associated with phycotoxin exposure. The present study evaluated the transfer of domoic acid (DA) from Pseudo-nitzschia spp., potential producers of DA, to living and dead right whales via zooplanktonic vectors, while the whales are on their calving ground at PV. Phytoplankton and mesozooplankton (primary prey of the right whales at PV and potential grazers of Pseudo-nitzschia cells) were collected during the 2015 whale season and analyzed for species composition and abundance. DA was measured in plankton and fecal whale samples (collected during whale seasons 2013, 2014 and 2015) using liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The genus Pseudo-nitzschia was present in both gulfs with abundances ranging from 4.4 Â 10 2 and 4.56 Â 10 5 cell l À1 . Pseudo-nitzschia australis had the highest abundance with up to 4.56 Â 10 5 cell l À1 . DA in phytoplankton was generally low, with the exception of samples collected during a P. australis bloom. No clear correlation was found between DA in phytoplankton and mesozooplankton samples. The predominance of copepods in mesozooplankton samples indicates that they were the primary vector for the transfer of DA from Pseudo-nitzschia spp. to higher trophic levels. High levels of DA were detected in four whale fecal samples (ranging from 0.30 to 710 mg g À1 dry weight of fecal sample or from 0.05 and 113.6 mg g À1 wet weight assuming a mean water content of 84%). The maximum level of DA detected in fecal samples (710 mg DA g À1 dry weight of fecal sample) is the highest reported in southern right whales to date. The current findings demonstrate for the first time that southern right whales, E. australis, are exposed to DA via copepods as vectors during their calving season in the gulfs of PV.

Journal of Sea Research, 2015

Península Valdés (PV) in Argentina is an important calving ground for the southern right whale Eu... more Península Valdés (PV) in Argentina is an important calving ground for the southern right whale Eubalaena australis. However, a high mortality of calves has been observed in the last years, which could be associated with phycotoxin exposure. During a sampling program conducted late in the calving seasons of 2004, 2005 and 2010, potentially toxic species of the genus Pseudo-nitzschia were observed to be an important component of the phytoplankton community and they were also found in fecal samples of two live whales and three stranded whales. In line with this, in the present study Pseudo-nitzschia australis, Pseudo-nitzschia fraudulenta, Pseudo-nitzschia pungens and the complex Pseudo-nitzschia pseudodelicatissima were identified in fecal samples and phytoplankton samples by light and electron microscopy. Although no toxin analysis was carried out in the present study, our findings suggest that E. australis could be exposed to domoic acid in their calving ground.

Ultraestructura, polimorfismo y ecología de Odontella aurita (Lyngbye) Agardh (Bacillariophyceae) en el estuario del río Chubut, Argentina

Diatomeas y Dinoflagelados del Estuario del Río Chubut, Patagonia, Argentina. II Estructura de las Comunidades

Monitoreo De Fitoplancton Toxico y Toxicidad en Moluscos en El Litoral De La Provincia Del Chubut (Patagonia, Argentina)

Floración de Aulacoseira granulata (Ehr.) Simonsen en el curso inferior del río Chubut, Patagonia Argentina

Revista Brasileira de Biologia

Evaluación de la contaminación urbana de la Ría de Deseado (Provincia de Santa Cruz)

First detection of domoic acid produced by Pseudo-nitzschia species, Chubut coastal waters, Patagonia, Argentina

Green discolorations in Nuevo Gulf, Chubut Province, Argentina

Paraliytic Shellfish Toxins in mussels and Alexandrium tamarense at Valdés Peninsula, Chubut, Patagonia, Argentina. Kinetics of a natural depuration

Journal of Shellfish Research

Morfología y presencia estacional de Alexandrium tamarense (Lebour) Balech en estaciones costeras del Golfo San Jorge (Patagonia, Argentina)

RESUMEN En este trabajo se describe la morfología y la presencia estacional de Alexandrium tamare... more RESUMEN En este trabajo se describe la morfología y la presencia estacional de Alexandrium tamarense (Lebour) Balech en tres localidades costeras del Golfo San Jorge (Patagonia, Argentina) desde diciembre de 2004 a diciembre del 2006. Las máximas concentraciones se han observado en Punta Novales que es la estación costera ubicada más al Norte del Golfo San Jorge. Todos los individuos observados de A. tamarense presentaron poro ventral en la primera placa apical y no formaron cadenas (estos caracteres son importantes para distinguir especies de Alexandrium). Durante el período de estudio este dinoflagelado evidenció un carácter estacional apareciendo en primavera – verano.