| Summary: | Over last decades, plastics debris have become a major problem in the marine envionment due to its persistence and chemical properties. The fragments derived from the larger plastic can be easily incorporated in food web of marine organism and its added toxics chemicals are incorporanted in their tissues may cause long-term adverse effects. As an example the phtalates considered endocrine disrupters, can interact with hormone synthesis and alter reproduction or other physiological and metabolic functions. The purpose of this research is to determine concentration of phtalates present in three large whale species (Balaenoptera physalus, Eschrichtius robustus y Megaptera novaeangliae) from its economic, social and environmental importance to Mexican community. In this way we will use this chemical such as plastic tracer in these different species. The sampling shall be carried out according its principal areas of reproduction, breeding or feeding; San Ignacio Lagoon (gray whales), Los Cabos (humpback whales) and La Paz Bay (fin whales). Biopses of 30 individuals for each species will be take (90n). Therefore, extraction and analysis of phthalates will be carried out (DEHP and MEHP). The generated information will allow to establish a platform for a research field that is in development, as well to know the grade of impact caused by microplastics to which these marine organisms are exposed in the different regions.
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