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At first, BMAA appeared to be ubiquitously present worldwide in various organisms, from aquatic and terrestrial food webs. However, recent studies, using detection methods based on mass spectrometry, instead of fluorescence detection, suggest that the trophic transfer of BMAA is debatable. This study evaluated BMAA in 22 cetaceans of three different species (Phocoena phocoena, n = 8, Delphinus delphis, n = 8, and Tursiops truncatus, n = 6), found stranded in North-West Spain. BMAA analysis of the liver, kidney, or muscle tissues via sensitive liquid chromatography with tandem mass spectrometry did not reveal the presence of this compound or its isomers. The absence recorded in this study highlights the need to better understand the trophic transfer of BMAA and its anatomical distribution in marine mammals.<\/jats:p>","DOI":"10.3390\/jmse10030314","type":"journal-article","created":{"date-parts":[[2022,2,23]],"date-time":"2022-02-23T22:54:02Z","timestamp":1645656842000},"page":"314","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["No \u03b2-N-Methylamino-L-alanine (BMAA) Was Detected in Stranded Cetaceans from Galicia (North-West Spain)"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8356-5688","authenticated-orcid":false,"given":"Luc\u00eda","family":"Soli\u00f1o","sequence":"first","affiliation":[{"name":"Portuguese Institute of the Sea and Atmosphere (IPMA), Rua Alfredo Magalh\u00e3es Ramalho, 6, 1495-006 Lisbon, Portugal"},{"name":"Centre of Marine Sciences (CCMAR\/CIMAR LA), Campus de Gambelas, University of Algarve, 8005-139 Faro, Portugal"}]},{"given":"Sea-Yong","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden"}]},{"given":"Alfredo","family":"L\u00f3pez","sequence":"additional","affiliation":[{"name":"Departamento de Biologia & CESAM, Campus Universit\u00e1rio de Santiago, Universidade de Aveiro, 3810-193 Aveiro, Portugal"},{"name":"Coordinadora para o Estudo dos Mam\u00edferos Mari\u00f1os (CEMMA), R\u00faa Cean 2, 36350 Nigr\u00e1n, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4507-2943","authenticated-orcid":false,"given":"Pablo","family":"Covelo","sequence":"additional","affiliation":[{"name":"Coordinadora para o Estudo dos Mam\u00edferos Mari\u00f1os (CEMMA), R\u00faa Cean 2, 36350 Nigr\u00e1n, Spain"}]},{"given":"Sara","family":"Rydberg","sequence":"additional","affiliation":[{"name":"Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91 Stockholm, Sweden"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6083-470X","authenticated-orcid":false,"given":"Pedro Reis","family":"Costa","sequence":"additional","affiliation":[{"name":"Portuguese Institute of the Sea and Atmosphere (IPMA), Rua Alfredo Magalh\u00e3es Ramalho, 6, 1495-006 Lisbon, Portugal"},{"name":"Centre of Marine Sciences (CCMAR\/CIMAR LA), Campus de Gambelas, University of Algarve, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0167-7163","authenticated-orcid":false,"given":"Sandra","family":"Lage","sequence":"additional","affiliation":[{"name":"Centre of Marine Sciences (CCMAR\/CIMAR LA), Campus de Gambelas, University of Algarve, 8005-139 Faro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,2,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"271","DOI":"10.1016\/j.phytochem.2017.10.002","article-title":"50 years of research on \u03b1-amino-\u03b2-methylaminopropionic acid (\u03b2-methylaminoalanine)","volume":"144","author":"Nunn","year":"2017","journal-title":"Phytochemistry"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"517","DOI":"10.1126\/science.3603037","article-title":"Guam Amyotrophic Lateral Sclerosis-Parkinsonism-Dementia linked to a plant excitant neurotoxin","volume":"237","author":"Spencer","year":"1987","journal-title":"Science"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"956","DOI":"10.1212\/WNL.58.6.956","article-title":"Cycad neurotoxins, consumption of flying foxes, and ALS-PDC disease in Guam","volume":"58","author":"Cox","year":"2002","journal-title":"Neurology"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"7","DOI":"10.3109\/17482960903286009","article-title":"Beyond Guam: The cyanobacteria\/BMAA hypothesis of the cause of ALS and other neurodegenerative diseases","volume":"10","author":"Bradley","year":"2009","journal-title":"Amyotroph. 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