Trophic ecology as an indicator of ecosystem health in two important resources of southern demersal Chilean fisheries
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Fecha
2022
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Profesor/a Guía
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Idioma
en
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Universidad Andrés Bello
Nombre de Curso
Licencia CC
Licencia CC
Resumen
Ecosystem stability depends closely on the forces of interaction between predators and
prey, therefore, quantifying the interaction of species is essential to understand how the ecosystem
responds to various disturbances. In the Chilean Patagonia, the intensity of the connections in the
trophic webs where southern hake (Merluccius australis) and Patagonian grenadier (Macruronus
magellanicus) participate is mediated by fishing pressure. On the other hand, the accumulation of
heavy metals in commercial fish is an effect not yet evaluated in the study system, and it may vary
according to the area of extraction of the resource. In this context, this project proposes three
hypotheses:
H1: The decline of M. magellanicus causes an alteration in the trophic dynamics of M. australis.
H2: The extractive activity of SCDF in Chilean Patagonia has generated a negative impact on the
total trophic structure. Therefore, the total trophodynamic indicators will have a behaviour similar
to that observed in the historical data of SCDF.
H3: The trophic structures of M. australis and M. magellanicus in inland waters will present a
higher concentration of heavy metals, compared to the trophic structures of these species in outer
waters.
Notas
Tesis (Doctora en Medicina de la Conservación)
This research project was approved and conducted by Chilean law under Res. Ex. N°51998/2014, N°2043/2015 and N°2363/2016 of the Undersecretary of Fisheries of Chile (SUBPESCA, from Spanish)
This research was funded by the Fishery Research Fund IFOP-SUBPESCA season 2014 to 2018 and the Dirección General de Investigación y Doctorados, Universidad Andres Bello.
This research project was approved and conducted by Chilean law under Res. Ex. N°51998/2014, N°2043/2015 and N°2363/2016 of the Undersecretary of Fisheries of Chile (SUBPESCA, from Spanish)
This research was funded by the Fishery Research Fund IFOP-SUBPESCA season 2014 to 2018 and the Dirección General de Investigación y Doctorados, Universidad Andres Bello.
Palabras clave
Cadenas de Alimentación (Ecología), Recursos Marinos, Investigaciones, Chile