28 documents found, page 1 of 3
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...
Leader material and bait effects on target and bycatch species caught in an Atl...
Casaca Santos, Catarina; Santos, Miguel N.; Rosa, Daniela; Coelho, RuiThe influence of bait type and leader material on target and bycatch species was assessed through fishing experiments in the Portuguese shallow pelagic longline fishery in the Atlantic Ocean. Wire leaders were found to decrease catch rates of commercially valuable species such as bigeye tuna and yellowfin tuna, while increasing catch rates of elasmobranchs, including the blue shark and shortfin mako. The odds r...
Comparing GLM, GLMM and GEE modeling approaches for catch rates of bycatch spec...
Coelho, R.; Infante, Paulo; Santos, Miguel N.Modeling and understanding the catch rate dynamics of marine species is extremely important for fisheries management and conservation. For oceanic highly migratory species in particular, usually only fishery‐dependent data are available which have limitations in the assumption of independence and if often zero‐inflated and/or overdispersed. We tested different modeling approaches applied to the case study of bl...
Comparing GLM, GLMM, and GEE modeling approaches for catch rates of bycatch spe...
Coelho, Rui; Infante, Paulo; Santos, Miguel N.Modeling and understanding the catch rate dynamics of marine species is extremely important for fisheries management and conservation. For oceanic highly migratory species in particular, usually only fishery‐dependent data are available which have limitations in the assumption of independence and if often zero‐inflated and/or overdispersed. We tested different modeling approaches applied to the case study of bl...
Local indicators for global species: Pelagic sharks in the tropical northeast A...
Coelho, Rui; Macías, David; Ortiz de Urbina, Josetxu; Martins, Albertino; Monteiro, Carlos; Lino, Pedro G.; Rosa, Daniela; Casaca Santos, CatarinaPelagic sharks are an important bycatch in pelagic fisheries, especially for drifting longlines targeting swordfish. In the Cabo Verde Archipelago (tropical NE Atlantic), pelagic shark catches can reach a significant proportion of the total catches. Due to the increased concern on the status of pelagic shark species, this study was developed to enhance the current knowledge of those sharks in the Cabo Verde reg...
Local fishermen’s perceptions of the usefulness of artificial reef ecosystem se...
Ramos, Jorge; Lino, Pedro; Himes-Cornell, Amber; Santos, Miguel N.Proponents of artificial reef (AR) deployment are often motivated by the usefulness of such structures. The usefulness of ARs is related to their capability of providing ecosystem services/additional functions. We present two distinct Portuguese AR case studies: (1) The Nazaré reef off the central coast of Portugal and (2) the Oura reef off the Algarve coast. Semi-structured interviews were conducted with local...
Modelling long-term fisheries data to resolve the attraction versus production ...
Roa-Ureta, Ruben H.; Santos, Miguel N.; Miguel de Sousa Leitão, FranciscoThe main role of artificial reefs (ARs) is to enhance the productivity and sustainability of coastal fisheries by creating new fish biomass. From a modelling point of view, the creation of new fish biomass would be realized by a shift to a state of higher carrying capacity of the environment (K) for aquatic populations and communities. However, it has not been possible to demonstrate unequivocally rising K as a...
Microsatellite loci in the tiger shark and cross-species amplification using py...
Mendes, Natalia J. [UNESP]; Cruz, Vanessa P. [UNESP]; Ashikaga, Fernando Y. [UNESP]; Camargo, Samia M. [UNESP]; Oliveira, Claudio [UNESP]Made available in DSpace on 2018-11-26T17:06:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-08-30; Investigador-FCT contract from the Portuguese Foundation for Science and Technology (FCT, Fundacao para a Ciencia e Tecnologia) - EU European Social Fund; Programa Operacional Potencial Humano; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); The tiger shark (Galeocerdo cuvier) has a globa...
Structure and genetic variability of the oceanic whitetip ahark, carcharhinus l...
Camargo, Sâmia M. [UNESP]; Coelho, Rui; Chapman, Demian; Howey-Jordan, Lucy; Brooks, Edward J.; Fernando, Daniel; Mendes, Natalia J. [UNESP]Made available in DSpace on 2018-12-11T17:03:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-05-01; Information regarding population structure and genetic connectivity is an important contribution when establishing conservation strategies to manage threatened species. The oceanic whitetip shark, Carcharhinus longimanus, is a highly migratory, large-bodied, pelagic shark listed by the IUCN (Internation...
Distribution patterns and population structure of the blue shark (Prionace glau...
Coelho, Rui; Mejuto, Jaime; Domingo, Andrés; Yokawa, Kotaro; Liu, Kwang-Ming; Cortés, Enric; Romanov, Evgeny V.; da Silva, Charlene; Hazin, FábioThe blue shark (Prionace glauca) is the most frequently captured shark in pelagic oceanic fisheries, especially pelagic longlines targeting swordfish and/or tunas. As part of cooperative scientific efforts for fisheries and biological data collection, information from fishery observers, scientific projects and surveys, and from recreational fisheries from several nations in the Atlantic and Indian Oceans was co...