Joana Vasconcelos

Joana Vasconcelos
Universidade da Madeira | UMA · Centro de Ciências da Vida

PhD in Biological Sciences

About

53
Publications
5,851
Reads
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283
Citations
Introduction
I have focused my scientific activity on fishery biology (studying life history parameters: age and growth and reproductive strategies), stock assessment, population and community dynamics, and biodiversity shifts due to natural or anthropogenic factors, especially those of commercial interest, and their evolution due to natural or anthropogenic factors.
Additional affiliations
September 2018 - August 2019
Universidad Católica de la Santísima Concepción
Position
  • PostDoc Position
March 2016 - October 2018
Independent Researcher
Position
  • Researcher
September 2009 - February 2016
Secretaria Regional de Educacao
Position
  • Science Teacher
Description
  • Domain: Biology and Geology
Education
January 2010 - January 2017
Universidade da Madeira
Field of study
  • Biological Science
October 2004 - February 2007
October 1996 - February 2002
Universidade da Madeira
Field of study
  • Biology

Publications

Publications (53)
Article
Several artisanal fisheries target deep species. These stocks are highly sensitive to overfishing because of their slow growth and late maturation. This vulnerability is higher if species concentrate during spawning season in coastal areas, as occur with scabbardfishes (Aphanopus spp.). We herein explore if two Aphanopus species (A. carbo and A. in...
Article
The pattern of shell shape variation in populations of the top shell, Phorcus sauciatus from Madeira Island (NE Atlantic) was analysed as a function of substrate type and wave exposure, using geometric morphometrics. We hypothesized that P. sauciatus shows morphological variations to inhabit contrasting environments. Highly significant differences...
Article
Full-text available
The interaction between bottom-up and top-down processes in coastal ecosystems has Marinebeen scarcely studied so far. Temporal changes in trophic interactions of Zostera marina along the Swedish west coast are relatively well studied, with the exception of epifaunal communities. Epifauna was used as a model study to explore resource (bottom-up) or...
Article
Full-text available
The genetic polymorphism and phenotypic plasticity are key in ecology and evolution. The morphological variability of the contour of fish otoliths has been extensively used for the delimitation of stocks. These studies are conventionally based on average phenotype using elliptic Fourier analysis and lineal discriminant analysis as classifier. Consi...
Poster
Full-text available
In the Madeira archipelago (NE Atlantic ocean), limpets have been harvested since the early days of colonisation, dating back to the early 15 th century. Due to the continuous long-term exploitation, the reproductive dynamics of Patella ordinaria in the Madeira archipelago is thought to have changed. The knowledge of potential fecundity is useful w...
Article
Microbes associated with marine invertebrates play a key role in the physiological and biochemical processes of the host, and can be responsible for food-borne diseases in humans. Raw invertebrates are a common component of coastal gastronomy worldwide and their consumption could represent a potential risk to humans if their microbiome hosts infect...
Article
Hydrodynamics are a major environmental factor on intertidal rocky shores. Morphological responses to this factor are expected to strongly influence spatial distribution of species across environmental gradients. We here analysed the shell phenotypic variability of the limpet Fissurella latimarginata using geometric morphometric analysis. The limpe...
Article
Aims Rising sea-level following the Last Glacial Maximum lead to fragmentation of coastal limpet populations between islands of the Archipelago of Madeira. This fragmentation is reinforced by recent heavy exploitation reducing effective population size on Madeira Island. We use the limpet P. aspera to understand how the role of processes at differe...
Preprint
Rising sea-level following the Last Glacial Maximum lead to fragmentation of coastal limpet populations between islands of the Archipelago of Madeira. This fragmentation is reinforced by recent heavy exploitation reducing effective population size on Madeira Island. We use the limpet P. aspera to understand how the role of processes at different ti...
Article
Full-text available
Studies on microbial communities are pivotal to understand the role and the evolutionary paths of the host and their associated microorganisms in the ecosystems. Meta-genomics techniques have proven to be one of the most effective tools in the identification of endosymbiotic communities of host species. The microbiome of the highly exploited topshe...
Article
Weight-length relationships (WLRs) are frequently used for the development of comparative studies of life history, population dynamics, ecosystem modelling and estimation of the production and biomass of populations among regions. WLRs provide information about growth, wellbeing and fitness of a population in a marine environment. WLRs for four top...
Article
Intertidal molluscs are keystone species in intertidal rocky ecosystems often used as biological indicators of human-driven perturbations. The increasing levels of harvesting pressure on these intertidal grazers, due to the expansion of human population on coastal areas, is known to affect negatively the exploited populations by altering population...
Article
Full-text available
Length-weight relationships (LWRs) provide valuable information about growth and individual fitness on the population. LWRs are commonly used in studies on life history, population dynamics, ecosystem modelling and stock assessment. A comparative study on the effect of harvesting in the relative growth of Patella aspera between Marine Protected Are...
Article
Limpets are one of the most successful intertidal algal grazers in the north‐eastern Atlantic. They provide valuable ecosystem services, playing a pivotal role in maintaining rocky shore ecological balance and have an important economic value, being subject to high levels of exploitation in several oceanic archipelagos. Limpets represent one of the...
Article
Intertidal and shallow subtidal molluscs are highly sensitive to overharvesting because of their restricted habitat, limited mobility and easy access to humans. Several parameters have been previously used to determine their exploitation status, e.g. sizes, abundances and reproductive stages. Herein the reproductive parameters of two exploited limp...
Article
Hermaphroditism is thought to be an advantageous strategy common in marine molluscs that exhibit simultaneous, sequential or alternating hermaphroditism. Several species of patellid limpets have previously been shown to be protandrous hermaphrodites. The present study aimed to confirm whether this phenomenon occurs in Patella piperata. Transitional...
Article
Topshells play a pivotal role in intertidal rocky ecosystems and are adapted to harsh thermal and hydric stress. Phorcus sauciatus , a common grazer in the Macaronesian region (Madeira and the Canaries), has rarely been studied due to its restricted geographic distribution compared with Phorcus lineatus . Monthly samples were taken throughout 2017...
Conference Paper
Concerns on the effects of future and ongoing climate change in the terrestrial environment and open ocean have been extended to intertidal habitats. One of the consequences of climate change are the increase of intensity and frequency of hydrodynamic events (e.g., tsunamis, and increase of current and wave exposure), and consequently the increased...
Article
Harvesting of intertidal grazers such as topshells is known to affect negatively the exploited populations by altering population structure and decreasing abundance. Phorcus sauciatus has a wide geographic distribution in the Northeastern Atlantic Ocean and is subject to increasing levels of harvesting pressure due to the expansion of human populat...
Chapter
Full-text available
The harvesting of littoral benthic shellfish in the archipelago of Madeira dates back to the fifteenth century when the Portuguese discovered and colonized the archipelago. The consumption of littoral shellfish is part of the gastronomic cultural heritage of this region, appreciated by the local population and tourists, and has a high social and ec...
Article
Fishing is occurring all over the globe, with an increase trend of exploiting deep stocks. Several species are currently targeted from the deep ocean, and some artisanal fisheries developed fishing gears, e.g. long-lines, with limited impact to the environment but scarce information is available on biological aspects of these exploited stocks. In t...
Article
Intertidal limpets are subject to harvesting pressure in regions, e.g. oceanic islands, where marine organisms are a more accessible source of protein. These mollusks are very sensitive to human exploitation which often results on a decrease of their densities and an over-representation of immature individuals, because of the loss of large sized re...
Article
Full-text available
The deep-sea sharks associated as by-catch of the Madeiran midwater drifting longline fishery for scabbardfishes (Aphanopus spp.) were investigated by means of an experimental survey at 800-1200 m depth within the Canary Islands Exclusive Economic Zone, whose fishing grounds have been exploited during the past 15 years. Nine species of chondrichthy...
Article
A total of 49,151 blue jack mackerel, Trachurus picturatus, (Bowdich) were 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 decrease...
Article
The population structure of the blue jack mackerel (Trachurus picturatus, Osteichthyes, Carangi-dae), 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 populat...
Thesis
This thesis addressed two main themes: the identification of the stock structure of blue jack mackerel, Trachurus picturatus (Bowdich, 1825), in the South Atlantic Northeast and the study of life history parameters for the Madeira population. The stock structure of blue jack mackerel is still unknown, and to identify the populational units, three a...
Article
In order to evaluate the use of parasites as biological tags to identify populations of the oceanic horse mackerel, Trachurus picturatus, two samples of 100 fish each, caught off the Madeira and Canary Islands from January to June 2009, were examined for the presence of anisakids, trypanorhynchs, acanthocephalans and liver coccidians. In T. pictura...
Article
Full-text available
1 Age and growth of the pink dentex Dentex gibbosus (Rafinesque, 1810) caught off the Madeira Archipelago ADRIANA ALVES & JOANA VASCONCELOS Alves, A. & J. Vasconcelos 2012. Age and growth of the pink dentex Dentex gibbosus (Rafinesque, 1810) caught off the Madeira Archipelago. Arquipelago. Life and Marine Sciences 30: 1-9. A total of 146 otoliths w...
Article
Full-text available
The pelagic chub mackerel, Scomber colias Gmelin, 1789 is one of the most important fishery resources in the Madeira Archipelago. S. colias is caught by a small and coastal purse-seine fleet that traditionally operates around the islands. Monthly samples of chub mackerel were taken from commercial landings, between January 2002 and December 2005. S...
Article
Full-text available
The Atlantic chub mackerel, Scomber colias Gmelin, 1789, is one of the main fisheries resources of Madeira Island. It is caught by a small and coastal purse-seine fleet that traditionally operates around the island. From January 2002 to December 2003, monthly samples of chub mackerel were collected from landings by this commercial fishing fleet. A...
Conference Paper
Full-text available
The Atlantic chub mackerel, Scomber colias Gmelin, 1789, is one of the main fisheries resources of Madeira Island. It is caught by a small and coastal purse-seine fleet that traditionally operates around the island. In 2002 and 2003, monthly samples of Atlantic chub mackerel were collected from the landings of this commercial fishing fleet. A total...
Article
Full-text available
Between 1984 and 1986, 630 pairs of sagitta otoliths were collected to determine the age and growth of the blue jack mackerel, Trachurus picturatus from Madeiran waters. The oldest specimen in this study was nine years old and the largest was 46 cm of total length (TL). The parameters of the von Bertalanffy growth curve were estimated for the whole...
Article
Full-text available
El coccinélido Hyperaspis pantherina Fürsch, depredador específico de la cochinilla Orthezia insignis Browne, ha sido importado de Kenia y está siendo reproducido en laboratorio desde Julio de 2002 en la Isla de Madeira. Los adultos obtenidos han sido liberados sobre Jacaranda mimosifolia D. Don, árbol ornamental utilizado en las calles y jardines...

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Projects

Projects (2)
Project
(1) Infer how complex life cycles are influencing persistent trajectories along disturbed metacommunities. (2) Interpreting the role of human exploitation on spatial synchrony and extinction probability. (3) Explore diversity patterns at intra- and inter-specific level to disentangle the role of the spatial structure in predicting metacommunity persistence. R&D project financed by national funds through FCT - Fundação para a Ciência e a Tecnologia, I.P.