Cadmium and lead concentrations were determined in some common algal species living in the southernmost coasts of Argentina. Two different sampling areas were chosen: Gulf Nuevo, a locality being influenced by a developing industrial city, and Bay Camarones, a traditional harvest area for seaweed exploitation. Selected species of the genera Lessonia, Macrocystis and Gigartina, all of commercial interest, were collected from the harvest area, and analyses showed low levels of the metals in these species. Accumulation of Pb and Cd was also evident in other common brown seaweeds from the industrial site. Analysis of Al was included in this study due to an aluminum works near one of the sampling sites. High values of this metal ranging between 300 and 3000 mg Al/kg (dry basis) were recorded in the industrialized area. Amongst all of the species studied, Colpomenia sinuosa from Gulf Nuevo exhibited the highest values of aluminum. This preliminary survey showed that, except for Al, the levels of Cd and Pb were lower than those reported in same species of seaweeds from the polluted marine waters of the rest of the world.
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http://dx.doi.org/10.1016/0269-7491(94)p2613-e | DOI Listing |
Biodivers Data J
December 2024
Universidad Nacional Autonoma de Mexico, Mexico, Mexico Universidad Nacional Autonoma de Mexico Mexico Mexico.
Background: The coastal habitats in the southern Gulf of Mexico face multiple threats, such as rising water temperatures, acidification, increased turbidity, invasive species and pollutants. This imperils the biodiversity of beaches, wetlands and coral reefs. To address this, there is a need for comprehensive baseline information on marine biodiversity.
View Article and Find Full Text PDFSci Rep
June 2024
Laboratorio de Mamíferos Marinos, Centro para el Estudio de Sistemas Marinos (CESIMAR), CCT CENPAT, CONICET, Blvd. Brown 2915, U9120ACV, Puerto Madryn, Chubut, Argentina.
Southern right whales (SRWs, Eubalaena australis) have been observed feeding both at and below the surface (< 10 m) in Golfo Nuevo (42°42' S, 64°30' W), Península Valdés, Argentina, an area traditionally recognized as calving ground. In addition, we documented diving feeding behavior in SRWs during their stay in this gulf, which has not been previously described. We assessed this behavior using suction-cup-attached video-imaging tags (CRITTERCAMs) on individual whales.
View Article and Find Full Text PDFInsects
February 2024
Facultad de Ciencias Biologicas, Universidad Autonoma de Nuevo Leon, Av. Universidad s/n Cd. Universitaria, San Nicolas de los Garza 66455, Mexico.
Organic synthetic insecticides continue to be part of the arsenal for combating vector-borne diseases in Mexico. Larvicides are a fundamental part of the process in programs for mosquito control, temephos being one of the most widely used in Mexico. In the present study, we analyzed the frequency of temephos resistance in twenty-three populations using the discriminating concentration (DC) of 0.
View Article and Find Full Text PDFMar Pollut Bull
March 2024
INQUISUR, Departamento de Química, Universidad Nacional del Sur (UNS) - CONICET, Av. Alem 1253, B8000CPB Bahía Blanca, Buenos Aires, Argentina. Electronic address:
Organotin compounds are persistent pollutants and are considered chemicals of high environmental concern. In the present study, the distribution and degradation of tributyltin were evaluated in field sediments and through an ex situ experiment. For this, sediment samples from two locations were analysed: Luis Piedrabuena Harbour, with higher maritime traffic, and Cerro Avanzado, which receives less impact from anthropogenic activities.
View Article and Find Full Text PDFBiodivers Data J
January 2024
Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, Mexico Universidad Autónoma de Nuevo León San Nicolás de los Garza, Nuevo León Mexico.
Background: Monro, 1937 is a syllid genus, currently composed of four species: Monro, 1937 from the Arabian Sea, (Chlebovitsch, 1959) from the Kurile Islands, Imajima & Hartman, 1964 from Japan and Capa, San Martín & López, 2001 from the Pacific coast of Panama. The distribution of is circum-tropical to temperate waters, but the presence of species complexes has been suggested. In order to clarify the distribution of in many areas of the world, a re-description, based on examination of the type material, is required as a first step to a better understanding of its diagnostic features.
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