29 documents found, page 1 of 3
Consumer's perceptions and motivations on the consumption of fortified foods an...
Silva, Frederica; Pereira, Tatiana; Mendes, Susana; Gordo, Leonel; Gil, Maria ManuelConsumer attitudes and acceptance of emerging technologies in the food sector, as well as their application, are determining factors for their successful implementation. In this study, a survey was conducted in order to better know and understand the perception, motivation and consumption associated with fortified foods and 3DPF (3-Dimensional Printing Food). Key points such as food neophobia and factors involv...
Seasonal sensory evaluation of low commercial value or unexploited fish species...
Silva, Frederica; Duarte, Ana M.; Mendes, Susana; Magalhães, Elisabete; Pinto, Filipa R.; Barroso, Sonia; Neves, Ana; Sequeira, Vera; Vieira, Ana RitaOverfishing is increasing over time, and according to FAO (Food and Agriculture Organization), about one third of the world’s fish stocks are now overfished. Thus, diversifying the target species is essential for fisheries sustainability contributing to improve resource-effcient processes. Non-target species can be valuable resources for the development of new food products. However, those species are scarcely ...
Against all odds: a tale of marine range expansion with maintenance of extremel...
Robalo, Joana I.; Francisco, Sara M.; Vendrell, Catarina; Lima, Cristina S.; Pereira, Ana; Brunner, Benedikt; Dia, Mamadou; Gordo, LeonelThe displacement of species from equatorial latitudes to temperate locations following the increase in sea surface temperatures is among the significant reported consequences of climate change. Shifts in the distributional ranges of species result in fish communities tropicalisation, i.e., high latitude colonisations by typically low latitude distribution species. These movements create new interactions between...
Otolith shape and isotopic ratio analyses as a tool to study Spondyliosoma cant...
Neves, Ana; Vieira, Ana Rita; Sequeira, Vera; Paiva, Rafaela Barros; Janeiro, Ana Isabel; Gaspar, Luis Miguel; Gordo, LeonelKnowledge on population units is critical for understanding population dynamics and providing an adequate fisheries management. Despite its vast distribution and commercial importance, there is no information on black seabream population structure. Different approaches to otolith analysis were used to elucidate on the stock structure of this species. Otoliths from seven areas along the eastern Atlantic: English...
Insight on reproductive strategy in Portuguese waters of a commercial protogyno...
Neves, Ana; Vieira, Ana Rita; Sequeira, Vera; Paiva, Rafaela Barros; Gordo, LeonelInformation on fish reproductive strategy is essential to understand population dynamics. Samples of black seabream, Spondyliosoma cantharus, were collected from the western Portuguese continental coast to investigate the reproductive cycle, the timing of spawning, length at maturity and sex change, fecundity type and fecundity. This species is a protogynous hermaphrodite, showing a sharped biased sex ratio tow...
Identifying populations of the blue jack mackerel (Trachurus picturatus) in the...
Vasconcelos, Joana; Vieira, Ana Rita; Sequeira, Vera; González, José A.; Kaufmann, Manfred; Gordo, LeonelThe population structure of the blue jack mackerel (Trachurus picturatus, Osteichthyes, Carangidae), in the northeast Atlantic is still unknown. To identify any distinct population units, three areas were selected: waters off Madeira, Peniche (mainland Portugal), and the Canary Islands. Knowledge of population structure is an aspect of the population dynamics of a species that is essential to effectively assess...
Stock assessment of the blue jack mackerel, Trachurus picturatus, in the North-...
Vasconcelos, Joana; Sousa, Ricardo; Riera, Rodrigo; Delgado, João; Faria, Graça; Gordo, LeonelA total of 49,151 blue jack mackerel, Trachurus picturatus, (Bowdich) was collected in Madeira Island (North-eastern Atlantic) between 2002 and 2016 to evaluate possible influence of fishing on landings and reproductive parameters. A decreasing trend in the length composition was observed over the study period and length at first maturity decreased by 2.78 cm TL. Maximum yield per recruit decreased from 2002 to...
Phenotypic changes in the body of black seabream, Spondyliosoma cantharus (Tele...
Neves, Ana; Vieira, Ana Rita; Sequeira, Vera; Paiva, Rafaela Barros; Gordo, LeonelKnowledge of population spatial structure is essential in fisheries management. The study of morphological variation patterns in fishes can indicate differences in growth and maturation rates, and thus provide information on group dynamics that should be modelled and managed separately. Identification of intraspecific groups which have different life history features is necessary for understanding population dy...
Growth and distribution of mackerel Scomber scombrus Linnaeus, 1758 from the we...
Costa, Ana Maria; Gordo, Leonel; Martins, Maria ManuelAbstract: This paper studies the growth of 7379 Atlantic mackerels (Scomber scombrus Linnaeus, 1758), 3626 males, 3726 females and 27 immature, caught by the commercial fleet, during 2009-2013 off the Portuguese coast (ICES Division IXa South). Age determination was done by counting the annual growth rings on otoliths from 3301 individuals. The studied fish showed a range of lengths from 16 to 49 cm (mean lengt...
Fecundity regulation strategy of the blue jack mackerel, Trachurus picturatus (...
Vasconcelos, Joana; Faria, Graça; Freitas, Rita; Gordo, LeonelThis contribution intends to verify the type of fecundity regulation of the blue jack mackerel. For this purpose, the oocyte development process was analysed. A total of 158 ovaries were sampled between January 2009 and April 2010 from purse-seiners operating in the Madeira Island waters, NE Atlantic Ocean. Histological analysis and visual image analysis system were used to study the four main criteria applied ...