FRCH - Producción en Investigación, Desarrollo e Innovación
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Item The use of landmark-based geometric morphometrics to study bodyshape variations in Doryteuthis sanpaulensis (Cephalopoda: Loliginidae) from Brazilian and Argentinean waters(Cephalopod International Advisory Council Conference, 2015) Crespi Abril, Augusto César; Ortíz, Nicolás; Braga, Ramiro; Bainy, MaraTrabajo presentado en "Cephalopod International Advisory Council Conference 2015", Hakodate, Japón.Item Analysis of the morphological variation of Doryteuthis sanpaulensis (Cephalopoda: Loliginidae) in Argentinian and Brazilian coastal waters using geometric morphometrics techniques(2017-03-03) Braga, Ramiro; Crespi Abril, Augusto César; Van der Molen, Silvana; Rodrigues Silveira Bainy, Mara Cristiane; Ortíz, NicolásShape variation of individuals from three locations, two from Argentina and one from Brazil, was analysed by geometric morphometrics techniques. Individuals were weighed, measured, sexed, assigned to a maturity stage and photographed. For the analysis, two landmark configurations were used: one of nine landmarks (9L) and another of 25 landmarks (25L). To visualise shape variation, a principal component analysis (PCA) on Procrustes coordinates was conducted. The percentage of total shape variation explained by the 9L configuration was 80.5% (PC1: 61% and PC2: 19.5%), while the percentage for the 25L configuration was 76.4% (PC1: 54.8% and PC2: 21.6%). Based on this, shape analyses were performed using only the 9L configuration. The PCA results indicated that specimens show a large overlap between the categories based on sex and maturity stage. When location is considered, squid shape from São Sebastião and Rawson Port were very similar, while in Nuevo Gulf, the presence of two different morphological groups were observed: one similar to São Sebastião and Rawson Port, and the other with a morphology typical of Nuevo Gulf. Thus, two different morphotypes were defined: (i) morphotype of the continental shelf and (ii) morphotype typical of the gulf. The continental shelf morphotype is characterised by larger fins and wider mantle than the gulf morphotype. These results suggest that the morphotypes of Doryteuthis sanpaulensis are adaptations to oceanographic regimens.Item Observaciones preliminares sobre la alimentación de subadultos de Octopus tehuelchus con dietas fresca y formulada(Fabiana Lía Capitanio, 2018) Fracas, Pablo A.; Xaus, Lucila; Berrueta, María Mercedes; Desiderio, Julián; Ortíz, NicolásTrabajo presentado en las X Jornadas Nacionales del Mar y en las XVIII Coloquio Internacional de Oceanografía (2018)Item Utilización de técnicas ecográficas para la evaluación del estatus reproductivo en Octopus tehuelchus (Cephalopoda: octopodidae)(Capitanio, Fabiana Lía, 2018) Berrueta, María M.; Radonic, Mariela; López, Andrea V.; Desiderio, Julián; Ortíz, NicolásTrabajo presentado en las X Jornadas Nacionales de Ciencias del Mar y XVIII Coloquio Nacional de Oceanografía.Item Caracterización nutricional del pulpito tehuelche (Octopus tehuelchus)(Capitanio, Fabiana Lía, 2018) Ortíz, Nicolás; Dima, Jimena; Fiedorowicz Kowal, Martina Victoria; Castañeda, JorgeTrabajo presentado en el X Jornadas Nacionales de Ciencias del Mar 2018Item Hacia el cultivo de Octopus tehuelchus: ensayos de crecimiento de juveniles y tiempos de sobrevida sin alimentación(Capitanio, Fabiana Lía, 2018) Braga, Ramiro; Van der Molen, Silvana; Dichiera, Nahuel; Ortíz, NicolásTrabajo presentado en el X Jornadas Nacionales de Ciencias del Mar 2018Item Parásitos y enfermedades que afectan a las poblaciones del pulpito tehuelche, Octopus tehuelchus, en los golfos San José y Nuevo, Chubut, Argentina(Capitanio, Fabiana Lía, 2018) Glasinovich, Natusha; Vázquez, Nuria; Pontones, Julián; Ortíz, Nicolás; Camino, Gestal; Cremonte, FlorenciaTrabajo presentado en las X Jornadas Nacionales de Ciencias del Mar 2018.