Miguel Machete

Miguel Machete
IMAR Marine and Environmental Research Centre | IMAR-CMA · Department of oceanography and fisheries

MSc integrated ocean studies

About

19
Publications
4,148
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84
Citations

Publications

Publications (19)
Article
Fisherman have known and explored the association between tuna and whale sharks for centuries. Just as in the past, present day industrial fishers search for the presence of whale shark as cue to locate tuna schools. These whale shark-tuna associations have been usually assumed to result from the same ecological drivers that govern the attraction o...
Research
Full-text available
Abstract In 2019 Biosphere Expeditions concluded its 15th year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 29 March to 18 April and concentrated on six main proj...
Article
Full-text available
After hatching, juveniles of most sea turtle species undertake long migrations across ocean basins and remain in oceanic habitats for several years. Assessing population abundance and demographic parameters during this oceanic stage is challenging. Two long-recognized deficiencies in population assessment are (i) reliance on trends in numbers of ne...
Research
Full-text available
Abstract In 2018 Biosphere Expeditions concluded its fourteenth successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 8 March to 19 April and concentrated...
Article
In contrast to the vast majority of European maritime territories, the Azores is an isolated oceanic archipelago in the North East Atlantic characterised by small-scale hooks-and-lines fisheries. Yet, in spite of the low environmental impact of such fishing gears, there is no solid integrative information on the discard practices. This study bridge...
Article
The distribution and composition of macro litter floating around oceanic islands is poorly known, especially in the North Atlantic. Due to its isolated location at the fringe of the North Atlantic subtropical gyre, the Azores archipelago has recently been proposed as a potential retention zone for floating litter. To further investigate this assump...
Article
Full-text available
Small-scale artisanal fisheries can have a significant negative impact in cetacean populations. Cetacean bycatch has been documented in the pole-and-line tuna fishery in the Azores with common dolphins being the species more frequently taken. Based on data collected by observers on ∼50% of vessels operating from 1998 to 2012, we investigate the inf...
Data
Estimates of common dolphin bycatch for the bigeye tuna fishery from 1998–2012.
Research
Full-text available
Abstract In 2016 Biosphere Expeditions concluded its thirteenth successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 4 April to 5 May and concentrated on...
Presentation
Full-text available
The Azores is a group of islands located in the NE Atlantic that is largely dependent upon its marine resources. As for most oceanic islands, fishing has always been a key driver of the local Azorean economy. The Azorean fishing industry is a multi-segmented sector, targeting multiple species with a wide range of fishing gears and methods that can...
Data
Marine spatial planning and ecological research call for high-resolution species distribution data. However, those data are still not available for most marine large vertebrates. The dynamic nature of oceanographic processes and the wide-ranging behavior of many marine vertebrates create further difficulties, as distribution data must incorporate b...
Research
Full-text available
Abstract In 2015 Biosphere Expeditions concluded its twelfth successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 6 to 27 April 2015 and concentrated on s...
Research
Full-text available
Abstract In 2014 Biosphere Expeditions concluded its eleventh successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 7 April to 10 May and concentrated on s...
Research
Full-text available
Abstract In 2013 Biosphere Expeditions concluded its tenth year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 8 to 29 April 2013 and concentrated on six main proje...
Research
Full-text available
Abstract In 2012 Biosphere Expeditions concluded its ninth successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 2 April to 5 May 2012 and concentrated on...
Research
Full-text available
Abstract In 2011 Biosphere Expeditions concluded its eighth successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 4 to 25 April and concentrated on six mai...
Research
Full-text available
Abstract In 2010 Biosphere Expeditions concluded its seventh successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the island of Faial and work was conducted around the three islands of Faial, Pico and São Jorge. The expedition ran from 3 April until 10 May 2010 and concentrat...
Research
Full-text available
In 2006 Biosphere Expeditions concluded its third successful year of cetacean photo-identification and distribution studies in the Azores. The expedition was based in Horta on the Island of Faial and work was conducted around three islands of Faial, Pico and São Jorge. The expedition ran from 17 April until 27 May and concentrated on six projects....

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Projects

Project (1)
Project
Protecting whales, dolphins and turtles around the Azores archipelago in the Atlantic Ocean through citizen science