Alessandra Alves Muniz

Formação complementar

Idiomas

Participação em eventos

Projetos de pesquisa

• 2018 - 2018

  BIOGEOCHEMICAL SIGNATURES OF OTOLITHS AS A TOOL TO STUDY THE POPULATION STRUCTURE, MOVEMENT AND HABITAT CONNECTIVITY OF CHUB MACKEREL (SCOMBER COLIAS) IN THE NORTHEAST ATLANTIC, Descrição: Chub mackerel, Scomber colias, is one of the top pelagic fish species landed by the Portuguese purse seine fleets. However information regarding S. colias stock structure and population dynamics is still limited. Otolith chemistry has become a popular tool to unravel the population structure of marine fish, namely when water mass heterogeneity exist being reflected in the elemental and isotopic composition of otoliths. The purpose of this work was to evaluate the potential use of the chemistry of the otoliths to obtain information about the stock structure of S. colias in the NE Atlantic. The sagittal otoliths of 30 juveniles per location (Azores, Canaries, Madeira and Portugal mainland - Matosinhos, Portimão and Sesimbra) ranging from 20 to 25 cm were used. Elemental (e.g. Sr:Ca, Mg:Ca, Mn:Ca and Ba:Ca) and isotopic (e.g. O and C) concentrations were recorded in whole otoliths using inductively coupled plasma mass spectrometry and isotope ratio mass spectrometry, respectively. Data was analysed by univariate and multivariate statistics. Regional differences in chemical composition were observed and related implications in terms of population structure are discussed in light of management of this fishery in the NE Atlantic.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Alessandra Alves Muniz - Coordenador / Ana Moura - Integrante / Raül Triay-Portella - Integrante / Paulo Talhadas Santos - Integrante / Alberto Teodorico Correia - Integrante.

• 2018 - 2018

  POPULATION STRUCTURE OF CHUB MACKEREL (SCOMBER COLIAS) IN THE NORTHEAST ATLANTIC INFERRED FROM OTOLITH SHAPE ANAYSIS, Descrição: The chub mackerel, Scomber colias, has a significant ecological and commercial importance for the NE Atlantic ecosystems. Currently the population structure of this species within this area is poorly known. Otolith shape analyses provides a basis fisheries stock assessment programs since it both reflects genetics and environmental influences. Fish samples were collected from six important fishery grounds in the NE Atlantic (Azores, Madeira, Canaries and Portugal mainland - Matosinhos, Sesimbra and Portimão) with total length ranging from 20 to 25 cm. The otolith shape was recorded using binary digital images obtained in stereomicroscope against a dark field. Data was processed using the free softwares ImageJ (shape indices) and Shape Analysis (elliptic Fourier descriptors). Data were analyzed using univariate and multivariate standard procedures. The obtained results highlight the need of a holistic approach when using phenotypic tags to properly infer about the population structure in marine fish.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Alessandra Alves Muniz - Coordenador / Ana Moura - Integrante / Raül Triay-Portella - Integrante / Paulo Talhadas Santos - Integrante / Alberto Teodorico Correia - Integrante.

• 2018 - 2018

  Stock discrimination of chub mackerel (Scomber colias) in the NE Atlantic inferred from body morphometrics, Descrição: The Chub mackerel, Scomber colias, is one of the main pelagic fisheries resources in the Northeast Atlantic. Commercial landings of chub mackerel have increased significantly in the Iberian Peninsula, namely in Portugal, during the last years. However the information regarding the population structure of this species, at present, is still limited. Morphometrics are phenotypic characteristics that describe fish body shape, being result of the interaction between environment and genetics. Regional morphometric data variation is useful to discriminate fish stock structure of various exploited marine species, and can provide additional knowledge to a better management and conservation of fisheries. This hereby study analysed juveniles (20 to 25 cm) caught in Azores, Canaries, Madeira and Portugal mainland (Portimão, Sesimbra and Matosinhos) by the artisanal fleets in early 2018. Several anatomic landmarks were defined along the body contour (e.g. fin insertion points) of the individuals using digital photos. Data were analyzed using standard statistics. The purpose of this work was to assess the use of body morphometrics as an alternative tool to obtain new information about the stock structure of S. colias in the NE Atlantic.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Alessandra Alves Muniz - Coordenador / Ana Moura - Integrante / Raül Triay-Portella - Integrante / Paulo Talhadas Santos - Integrante / Alberto Teodorico Correia - Integrante / Cláudia Moreira - Integrante.

• 2009 - 2011

  Percepção Ambiental da comunidade de entorno do Rio Camboriú sobre a mata ciliar, Descrição: Foi desenvolvido um trabalho com a população ribeirinha de Camboriú, em torno do Instituto Federal Catarinense - Campus Camboriú, onde foi levantado dados sobre a percepção dos moradores em relação ao Rio Camboriú através de questionários com perguntas abertas e fechadas e registro fotográfico do local em estudo.. , Situação: Concluído; Natureza: Pesquisa. , Integrantes: Alessandra Alves Muniz - Integrante / Liliane Kobarg da Costa - Coordenador / Bianca Bonifacio - Integrante.

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