Miguel Machete
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View article: An index to differentiate megafauna entangled in operational fishing gears from abandoned, lost, or otherwise discarded fishing gears
An index to differentiate megafauna entangled in operational fishing gears from abandoned, lost, or otherwise discarded fishing gears Open
Classifying entanglements of marine megafauna in certain anthropogenic items is challenging because many are found in fishing-related items, with the cause being either operational fishing gear (OFG) or abandoned, lost, or otherwise discar…
View article: The Portuguese industrial pelagic longline fishery in the Northeast Atlantic: Catch composition, spatio-temporal dynamics of fishing effort, and target species catch rates
The Portuguese industrial pelagic longline fishery in the Northeast Atlantic: Catch composition, spatio-temporal dynamics of fishing effort, and target species catch rates Open
The multispecific and highly dynamic nature of pelagic longline fisheries demands a holistic view that will likely benefit the development of effective management strategies. This study aims to provide an integrated perspective of the Port…
View article: Incidental capture of sea turtles in the Northeast Atlantic Portuguese pelagic longline fishery
Incidental capture of sea turtles in the Northeast Atlantic Portuguese pelagic longline fishery Open
Incidental catch or bycatch of sea turtles by pelagic longline fisheries is a major concern worldwide. The Northeast Atlantic hosts key foraging and developmental areas for oceanic juvenile loggerhead sea turtles (Caretta caretta) originat…
View article: Expedition report: Photo-identification and surveys of cetaceans in the central group of the Azores islands (March - April 2022)
Expedition report: Photo-identification and surveys of cetaceans in the central group of the Azores islands (March - April 2022) Open
In 2022 Biosphere Expeditions concluded its 16th year of cetacean photo-identification and distribution studies in the Azores, after a two-year break for COVID-19. The expedition was based in Horta on the island of Faial and work was condu…
View article: Abandoned, Lost or Otherwise Discarded Fishing Gear (ALDFG) in Tuna Pole-and-Line Fisheries
Abandoned, Lost or Otherwise Discarded Fishing Gear (ALDFG) in Tuna Pole-and-Line Fisheries Open
The fishing industry is recognized as one of the primary sources of at-sea marine litter, largely through its contributions via abandoned, lost or otherwise discarded fishing gear (ALDFG). Individual fleet’s contributions to ALDFG vary sig…
View article: The Azores Fishery Observer Program
The Azores Fishery Observer Program Open
The Azores Fishery Observer Program
View article: Data collection in fisheries: how to change the paradigm?
Data collection in fisheries: how to change the paradigm? Open
Data collection in fisheries: how to change the paradigm?
View article: Relative abundance of oceanic juvenile loggerhead sea turtles in relation to nest production at source rookeries: implications for recruitment dynamics
Relative abundance of oceanic juvenile loggerhead sea turtles in relation to nest production at source rookeries: implications for recruitment dynamics Open
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 cha…
View article: Estimating common dolphin bycatch in the pole-and-line tuna fishery in the Azores
Estimating common dolphin bycatch in the pole-and-line tuna fishery in the Azores Open
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 tak…
View article: POPA- Fisheries Observer Program of the Azores: Seabird sightings in the Azores tuna fishery from 2000 on: during navigation or search mode
POPA- Fisheries Observer Program of the Azores: Seabird sightings in the Azores tuna fishery from 2000 on: during navigation or search mode Open
Sightings of birds were recorded daily, at 6 different fixed periods (snap shots), when the boat was in navigation or search mode.
View article: POPA- Fisheries Observer Program of the Azores: Sea bird sightings in the Azores between 2004 and 2013 recorded by Biosphere Expedition
POPA- Fisheries Observer Program of the Azores: Sea bird sightings in the Azores between 2004 and 2013 recorded by Biosphere Expedition Open
Sightings (snap shots) of sea birds collected by Biosphere Expeditions collaborators specifically for POPA. Since 2004 that Biosphere Expeditions (www.biosphere-expeditions.org) collects data for POPA in the Azores central group in April a…
View article: POPA- Fisheries Observer Program of the Azores: Accessory species caught in the Azores tuna fishery between 2000 and 2013
POPA- Fisheries Observer Program of the Azores: Accessory species caught in the Azores tuna fishery between 2000 and 2013 Open
Other fish species caught during the tuna fishing operation that were commercialized. These species were caught along with the target species (tuna) by using pole and line.
View article: POPA- Fisheries Observer Program of the Azores: Marine mammal sightings in the Azores tuna fishery from 1998 to 2013: while fishing
POPA- Fisheries Observer Program of the Azores: Marine mammal sightings in the Azores tuna fishery from 1998 to 2013: while fishing Open
Recorded sightings of marine mammals close to the boat and/or interacting with the fishery, while tuna fishing.
View article: POPA- Fisheries Observer Program of the Azores: Seabird sightings in the Azores tuna fishery from 1998 to 2013: while fishing
POPA- Fisheries Observer Program of the Azores: Seabird sightings in the Azores tuna fishery from 1998 to 2013: while fishing Open
Recorded sightings of seabirds close to the boat and/or interacting with the tuna fishing, while capturing the tunas.
View article: POPA- Fisheries Observer Program of the Azores: Marine mammal sightings in the Azores between 2004 and 2013 recorded by Biosphere Expedition
POPA- Fisheries Observer Program of the Azores: Marine mammal sightings in the Azores between 2004 and 2013 recorded by Biosphere Expedition Open
Sightings (snap shots) of marine mammals collected by Biosphere Expeditions collaborators specifically for POPA. Since 2004 Biosphere Expeditions (www.biosphere-expeditions.org) collects data for POPA in the Azores central group in April a…
View article: POPA- Fisheries Observer Program of the Azores: Fish caught to be used as bait in the Azores tuna fishery from 1998 to 2013
POPA- Fisheries Observer Program of the Azores: Fish caught to be used as bait in the Azores tuna fishery from 1998 to 2013 Open
Small pelagic species that are caught to be used as bait for tuna fishery in pole and line boats.
View article: POPA- Fisheries Observer Program of the Azores: Discards in the Azores tuna fishery from 1998 to 2013
POPA- Fisheries Observer Program of the Azores: Discards in the Azores tuna fishery from 1998 to 2013 Open
Non declared species that are caught during fishing events (rejected, food for the crew, etc).
View article: Predicting Interactions between Common Dolphins and the Pole-and-Line Tuna Fishery in the Azores
Predicting Interactions between Common Dolphins and the Pole-and-Line Tuna Fishery in the Azores Open
Common dolphins (Delphinus delphis) are responsible for the large majority of interactions with the pole-and-line tuna fishery in the Azores but the underlying drivers remain poorly understood. In this study we investigate the influence of…
View article: Modeling the Potential Distribution and Richness of Cetaceans in the Azores from Fisheries Observer Program Data
Modeling the Potential Distribution and Richness of Cetaceans in the Azores from Fisheries Observer Program Data Open
© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Marine Science 2 (2016): 202, doi:10.3389/fmars.2016.00202.
View article: Mapped cetacean habitat suitability and richness in the Azores, links to ArcGIS files
Mapped cetacean habitat suitability and richness in the Azores, links to ArcGIS files Open
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-r…