Preliminary characterization of the benthic biodiversity in the Madeira – Tore complex through the project BIOMETORE

Lobo, Jorge; García‐Alegre, Ana; Miriam, Guerra; Buhl‐Mortensen, Lene; Buhl-Mortensen, Pål; Henriques, Victor

doi:10.3389/conf.fmars.2016.05.00143

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of seamounts extends from the Madeira archipelago (33 • N latitude) to the Portuguese mainland exclusive economic zone (EEZ, 38 • N) defined as the Madeira-Tore geologic complex (Morato et al, 2008). This complex provides appropriate conditions for the occurrence of distinctive and diverse benthic communities (Lobo et al, 2016) and provides spawning locations to bentho-pelagic species, as is the case of T. picturatus (Pakhorukov, 2008;Menezes et al, 2009). The Portuguese coast, that extends along the south-western region of the Iberian Peninsula, includes particular oceanographic and environmental attributes, like the Iberian Poleward Current, the Western Iberia Buoyant Plume, with different processes linked to bathymetry, wind regimes and upwelling filaments (Bettencourt et al, 2004;Santos et al, 2007).…”

Section: Study Areasmentioning

confidence: 99%

Thinking of Fish Population Discrimination: Population Average Phenotype vs. Population Phenotypes

Vasconcelos

Jurado-Ruzafa²,

Otero-Ferrer³

et al. 2021

Front. Mar. Sci.

View full text Add to dashboard Cite

The genetic polymorphism and phenotypic variation 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. Considering new analytical options, such as the wavelet transform and non-parametric algorithms, we here analyzed the otolith shape of Trachurus picturatus (blue jack mackerel) from mainland Portugal, Madeira, and the Canaries. We explore the phenotypic variation throughout a latitudinal gradient, establish a hypothesis to explain this variability based on the reaction norms, and determine how the use of average phenotype and/or morphotypes influences in the delimitation of stocks. Four morphotypes were identified in all regions, with an increase of phenotypes in warmer waters. The findings demonstrated that stocks were clearly separated with classification rates over 90%. The use of morphotypes, revealed seasonal variations in their frequencies and per region. The presence of shared phenotypes in different proportions among fishing grounds may open new management approaches in migratory species. These results show the importance of the phenotypic diversity in fisheries management.

show abstract