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Registros recuperados: 4
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Estimación de un índice de abundancia anual de gatuzo (Mustelus schmitti) a partir de datos de la flota comercial argentina. Período 1992-2008 OceanDocs
Pérez, M.; Massa, A.M.; Cordo, H.D..
Patagonian smoothhound (Mustelus schmitti) is one of the predominant cartilaginous fishes of the Argentine Sea (SW Atlantic Ocean). It is caught, mainly, in the coastal multispecific fishery with nearly other 30 bony and cartilaginous species. The group is known as ‘variado costero’. In this work the smoothhound abundance indices (CPUE) and standardized efforts for the 1992-2008 period in the area between 34~’S-42~’S were estimated. The General Lineal Model (GLM) and data derived from the argentine commercial fleet were used. Other aspects that could affect estimates and trends of the annual indices were also analyzed. Mean CPUE values estimated with the GLM, considered as annual standardized abundance indices, show an increasing trend as of 2000; the...
Tipo: Journal Contribution Palavras-chave: Abundance; Catch/effort; Coastal fisheries; Statistical analysis; Mustelus schmitti; Marine environment.
Ano: 2011 URL: http://hdl.handle.net/1834/4881
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La ictiofauna de Bahía San Blas (Provincia de Buenos Aires) y su relación con la dinámica de las pesquerías deportiva y artesanal OceanDocs
Llompart, F.M..
This study analyses the recreational and artisanal fisheries in San Blas Bay and their relationship with the dynamic of the temporal and spatial variability of the coastal fish assemblage. In addition some biological characteristics of two main target species are assessed. San Blas Bay is part of a natural reserve located in the southern part of Buenos Aires province, which has a great value in terms of tourism, ecology and productivity. According to different sampling methodologies used in this thesis 11 species of chondrychthes, 26 species of bony fish, and a hagfish (Class Petromizontida) were recorded, with a predominance of species belonging to Buenos Aires biogeographic province. To evaluate the fish assemblage seasonal pattern, every three months...
Tipo: Theses and Dissertations Palavras-chave: Artisanal fishing; Sport fishing; Fishery management; Coastal fisheries; Marine fish; Ecological associations; Abundance; Catch/effort; Biogeography; Fishing effort; Mustelus schmitti; Odontesthes argentiniensis; Marine environment.
Ano: 2011 URL: http://hdl.handle.net/1834/4779
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Morphological Changes in the Pregnant Uterus of the Smooth Hound Dogfish Mustelus schmitti Springer, 1939 (Gatuzo) (Condrichthyes, Triakidae): Microscopic Study and Phylogenetic Reproductive Implications International Journal of Morphology
Galíndez,E. J; Díaz Andrade,M. C; Moya,A. C; Estecondo,S.
Elasmobranchs are important, not only as an economic resource but also for their phylogenetic position. Their slow growth and long reproductive cycles, together with the high fisheries pressure exerted, attempt to the knowledge of all biological parameters of species. In this work we analyze the histology of the pregnant uterus of the gatuzo, a viviparous aplacental shark. The mucosa depicts modifications similar to those of placental species and others proper of histotrophism. Likewise, a network-like muscular layer in the mucosa was described for first time in the genus. The presence of vitelline plates in the gut of at term embryos suggests that the maternal supplies are not enough for the big fetus development. The relationships between maternal...
Tipo: Journal article Palavras-chave: Elasmobranchs; Reproduction; Uterus; Viviparity; Mustelus schmitti.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000400004
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Precisión en las evaluaciones por área barrida de algunos peces demersales costeros entre los 34º S Y 42º S, Atlántico Sudoccidental OceanDocs
Hansen, J.E.; Hozbor, N.; Lagos, N.; Martos, P..
To estimate the biomass of six species, the stratified design used at present for demersal coastal fish stocks is compared against other design alternatives. Density data (t mn-2 between 34ºS and 42ºS, from the coast line to 50m depth, corresponding to whitemouth croaker (Micropogonias furnieri), patagonian smoothhound (Mustelus schmitti), stripped) weakfish (Cynoscion guatucupa), angular angel shark (Squatina guggenheim), brazilian flathead (Percophis brasiliensis) and skate (Sympterygia bonapartii) collected in surveys carried out in spring and winter in the Argentine Sea (SW Atlantic), were analyzed. The spatial distribution of the species was strongly contagious and influenced by bottom salinity. Different marine zones that showed special salinity...
Tipo: Journal Contribution Palavras-chave: Stock assessment fishery surveys coastal fisheries stratification spatial analysis modelling demersal fish Micropogonias furnieri; Mustelus schmitti; Cynoscion guatucupa; Squatina guggenheim; Percophis brasiliensis; Sympterygia bonapartii PSW; Argentina; Buenos Aires ASW; Uruguay swept area marine environment.
Ano: 2010 URL: http://ocenadoc/1554veasecualser
Registros recuperados: 4
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