Characterization and evolution of spearfishing in Madeira archipelago, Eastern Atlantic

Martínez-Escauriaza, Roi; Vieira, C. R. S.; Gouveia, Lídia; Gouveia, Nuno; Hermida, Margarida

doi:10.1051/alr/2020015

Cited by 9 publications

(5 citation statements)

References 38 publications

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“…More than half of the sighting records were obtained during spearfishing, an activity that is conducted regularly throughout the year around the coastal areas of the archipelago, which enhances the probability of shark encounters [55]. Also, the practice of spearfishing can attract sharks due to the presence of live bait, which therefore increases the chance of a sighting, especially in species that have more opportunistic feeding behaviours, such as M. mustelus and P. glauca [56][57][58].…”

Section: Discussionmentioning

confidence: 99%

Human–Shark Interactions: Citizen Science Potential in Boosting Shark Research on Madeira Island

Berimbau,

Larrea,

Costa

et al. 2023

Diversity

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Sharks are regularly considered to be an indicator of the ocean ecosystem’s health and are generally difficult to study in their natural environment. Citizen science has been increasing, being a cost-effective method for particularly important species that have low encounter rates or are logistically challenging to sample. Madeira Island has a considerable gap in terms of its coastal shark species data and studies, which this work aims to complement. To achieve this goal, online questionnaires to citizens and specific interviews of spearfishers were conducted, with questions related to species size, distribution, and behaviour. Exactly 129 reports of shark sightings were obtained, including seven different species exhibiting four different types of behaviour around the coastal areas of the different municipalities of Madeira Island. Individuals seem to aggregate around the east and west edges of the island due to localised upwelling phenomena. Also, a relation was found between size and distance to coast and depth, as smaller sharks tend to stay close to the shore, probably reflecting the role of Madeira as a nursery area, but further studies are necessary to confirm the reliability of this hypothesis.

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Section: Discussionmentioning

confidence: 99%

Human–Shark Interactions: Citizen Science Potential in Boosting Shark Research on Madeira Island

Berimbau,

Larrea,

Costa

et al. 2023

Diversity

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“…Many of the featured recreational activities in oceanic islands, such as Madeira, focus on the sea, namely scuba diving, spearfishing, whale watching, and recreational fishing [73][74][75]. Involving stakeholders and their clients can complement and improve scientific data at various spatial and temporal scales [76,77].…”

Section: Discussionmentioning

confidence: 99%

A New Signal of Tropicalization in the Northeast Atlantic: The Spread of the Spotfin Burrfish Chilomycterus reticulatus in Madeira Archipelago and Its Invasion Risk

et al. 2021

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Current trends in the global climate facilitate the displacement of numerous marine species from their native distribution ranges to higher latitudes when facing warming conditions. In this work, we analyzed occurrences of a circumtropical reef fish, the spotfin burrfish, Chilomycterus reticulatus (Linnaeus, 1958), in the Madeira Archipelago (NE Atlantic) between 1898 and 2021. In addition to available data sources, we performed an online survey to assess the distribution and presence of this species in the Madeira Archipelago, along with other relevant information, such as size class and year of the first sighting. In total, 28 valid participants responded to the online survey, georeferencing 119 C. reticulatus sightings and confirming its presence in all archipelago islands. The invasiveness of the species was screened using the Aquatic Species Invasiveness Screening Kit. Five assessments rated the fish as being of medium risk of establishing a local population and becoming invasive. Current temperature trends might have facilitated multiple sightings of this thermophilic species in the Madeira Archipelago. The present study indicates an increase in C. reticulatus sightings in the region. This underlines the need for updated comprehensive information on species diversity and distribution to support informed management and decisions. The spread of yet another thermophilic species in Madeiran waters provides further evidence of an ongoing tropicalization, emphasizing the need for monitoring programs and the potential of citizen science in complementing such programs.

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“…This contrasts with the relatively high proportion of women fishers in Madeira (in comparison with other regions), around 10%, but they are mostly restricted to other modalities, especially shore angling and limpet collection (Martínez-Escauriaza et al 2020a, Hermida andCosta 2020). The average age of recreational boat fishers was similar to that of shore angling fishers (42.9; Martínez-Escauriaza et al 2020a), but they were older than spearfishers, an activity which tends to attract younger people with an average age of 32.8 (Martínez-Escauriaza et al 2020b).…”

Section: Recreational Boat Fishers' Characteristics and Opinionsmentioning

confidence: 99%

“…Among all the recreational fishing modalities, a higher percentage of boat fishers (8.5%) admitted to selling their catches, followed by spearfishers (6.9%; Martínez-Escauriaza et al 2020b) and shore anglers (3.5%; Martínez-Escauriaza et al 2020a). This percentage is surely underestimated for all the modalities, because many fishers who sell their catch illegally are reluctant to admit it in a questionnaire.…”

Section: Recreational Boat Fishers' Characteristics and Opinionsmentioning

confidence: 99%

Small-scale fisheries in Madeira: recreational vs artisanal fisheries

Martínez-Escauriaza

Gizzi

Gouveia³

et al. 2021

scimar

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Small-scale recreational and artisanal fisheries are popular activities in the Autonomous Region of Madeira, and to date no information is available on their impact on regional coastal ecosystems. Through fishers’ surveys and official registers of fish landings, we described and characterized these fisheries in Madeira, comparing artisanal and recreational fisheries. In 2017, artisanal boats landed 91 species in fishing ports, while recreational catches landed 58 species. The most frequent catches were Dentex gibbosus, Phycis phycis and Pagrus pagrus for artisanal fishery and P. pagrus, Serranus atricauda and Diplodus spp. for recreational fishery. Comparing the same techniques, artisanal fishery always showed higher catch per unit effort values than recreational boat fishery. Nevertheless, the low number of artisanal fishery boats in comparison with the recreational ones reflected the lower total landings of the artisanal fishery, which in 2017 were 62.3 t, compared with the 509.8 t estimated catches for the recreational fishery. Though the estimated recreational fishing data were based on surveys and thus subject to various biases, this activity seems to negatively affect coastal ecosystems and, together with artisanal fishing, exerts a combined pressure on targeted species. Improved legislation for both fisheries is essential for an appropriate management of resources.

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Characterization and evolution of spearfishing in Madeira archipelago, Eastern Atlantic

Cited by 9 publications

References 38 publications

Human–Shark Interactions: Citizen Science Potential in Boosting Shark Research on Madeira Island

Human–Shark Interactions: Citizen Science Potential in Boosting Shark Research on Madeira Island

A New Signal of Tropicalization in the Northeast Atlantic: The Spread of the Spotfin Burrfish Chilomycterus reticulatus in Madeira Archipelago and Its Invasion Risk

Small-scale fisheries in Madeira: recreational vs artisanal fisheries

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