242 documents found, page 1 of 25
Environmental DNA as a complementary tool for monitoring fish assemblages in co...
Fernandez, Sara; Monteiro, Pedro; Garcia-Vazquez, Eva; Gonçalves, Jorge Manuel Santos; Erzini, KarimFor their scarcity, invasive species in early invasion stages and endangered species are often difficult to detect compromising both conservation and ecosystem protection. Here environmental DNA (eDNA) was compared with beach seining for monitoring fish diversity in the protected Natural Park Ria Formosa lagoon (Portugal). Surface water for eDNA extraction was collected before sampling a mean of 1400m2 from ten...
Insights into conservation success: Analysing shore angling before implementing...
Nuñez-Velazquez, Samira; Veiga, Pedro; Jacinto, Gonçalo; Fonseca, Tereza; Monteiro, Pedro; Erzini, Karim; Gonçalves, Jorge M.S.; Horta e Costa, BarbaraIn January 2024, the "Natural Marine Park of the Algarve Reef – Pedra do Valado" (NMPAR-PV; southern Portugal), a community-based Marine Protected Area (MPA) was formally classified, setting the scene for a new paradigm for co-creating Portuguese MPAs. While complying with the best practices for MPA establishment, this area also contributes to national and international conservation targets. Measuring the succe...
Hybridization and introgression in black hakes (Merluccius polli and M. senegal...
Blanco‐Fernandez, Carmen; Rodriguez‐Roche, Jorge; L. Mateo, Juan; Erzini, Karim; Garcia‐Vazquez, Eva; Machado‐Schiaffino, GonzaloHybridization is relatively common between closely related species that share part of their distribution. Understanding its dynamics is important both for conservation purposes and to determine its role as an evolutionary mechanism. Here we have studied the case of black hakes (Merluccius polli and Merluccius senegalensis) in its contact zone. The area of study is located in the FAO fishing area 34, in Mauritan...
Season and seagrass: drivers of fish assemblage structure in the Banc d'Arguin,...
Compain, Philippe; Mallmann, Antonia; Sidina, Ebaye; Bourweiss, Mohammed; Ba, Mamadou Abdoul; Talla, Ismaila Samba; Niang, Alioune; Erzini, KarimThe Banc d’Arguin is the most ecologically significant coastal wetland of West Africa, a UNESCO Marine World Heritage area with one of the most extensive seagrass areas on Earth, used by many marine species as breeding and/or feeding habitat. However, little is known about the subtidal biodiversity supported by these extensive seagrass meadows. This study aimed to assess the influence of subtidal seagrass veget...
Reducing cetacean interactions with bottom set‐nets and purse seining using aco...
Marçalo, Ana; Carvalho, Flávia; Frade, Magda; Bentes, Luis; Monteiro, Pedro; Pontes, João; Ferreira Alexandre, Teresa Sofia; Oliveira, FredericoIn southern Iberia (NE Atlantic), cetacean bycatch is reported in several fisheries, whereas depredation by bottlenose dolphin (Tursiops truncatus) is commonly observed in bottom set-net fisheries. This study tested the effectiveness of acoustic deterrent devices in discouraging small cetaceans from approaching bottom set-nets and purse seine to reduce interactions. The acoustic deterrent devices used in the st...
On the accuracy of self-reported data for fishing effort estimates – a case stu...
Russo, Tommaso; Sales Henriques, Nuno; Erzini, Karim; Gonçalves, Jorge Manuel SantosThe quantification and the analysis of fishing activity is one the most important features in fisheries sciences and ocean management, and fishery-dependent data has always been the main source of information used to that end. Within the different types of fishery-dependent data, self-reported logbook data provides vast amounts of different information about fishing activities. Despite their enormous importance...
Spatial and temporal size distribution of swordfish in the Atlantic Ocean: impl...
Rosa, Daniela; Schirripa, Michael; Gillespie, Kyle; Macías, David; Forselledo, Rodrigo; Mourato, Bruno; Kai, Mikihiko; Arocha, Freddy; Su, Nan-JaySwordfish (Xiphias gladius) is a common target species of surface pelagic longline fisheries. In the Atlantic Ocean and Mediterranean Sea, swordfish is managed as three separate stocks, all having management measures in place to rebuild or conserve the stocks, including minimum landing sizes. The objective of this study was to review size data for swordfish in the Atlantic Ocean, model the sex-specific size dis...
Insights into conservation success: analysing shore angling before implementing...
Jacinto, Gonçalo; Veiga, Pedro; Monteiro, Pedro; Erzini, Karim; Gonçalves, Jorge Manuel Santos; Horta e Costa, Barbara; Pontes, JoãoIn January 2024, the "Natural Marine Park of the Algarve Reef - Pedra do Valado" (NMPAR-PV; southern Portugal), a community-based Marine Protected Area (MPA) was formally classified, setting the scene for a new paradigm for co-creating Portuguese MPAs. While complying with the best practices for MPA establishment, this area also contributes to national and international conservation targets. Measuring the succe...
Let’s measure it: an approach of high-resolution estimates of bottom fixed net ...
Sales Henriques, Nuno; Erzini, Karim; Gonçalves, Jorge Manuel Santos; Russo, TommasoFisheries are one of the most important food sources for human consumption whilst being amongst the most impacting and extractive activities happening within the marine environment, which makes it imperative to properly manage this activity. To improve fisheries management, the precise quantification of fishing effort is of the outmost importance. Yet, present methods for effort estimation, especially at broad ...
Multidisciplinary estimates of connectivity and population structure suggest th...
Abecasis, David; Ogden, R.; Winkler, Alexander; Gandra, Miguel; Khallahi, B.; Diallo, M.; Cabrera-Castro, R.; Weiller, Y.; Erzini, Karim; Afonso, P.Information on population structure and connectivity of targeted species is key for proper implementation of spatial conservation measures. We used a combination of genomics, biophysical modelling, and biotelemetry to infer the population structure and connectivity of Atlantic meagre, an important fisheries resource throughout its distribution. Genetic samples from previously identified Atlantic spawning locati...