Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Ecopath with Ecosim"”.
-
Reconstructing the Benguela ecosystem for a time before man's intervention
… and function. This will be investigated using Ecopath with Ecosim (EwE) There are currently available, models of the Benguela ecosystem based on modern catch and biomass data that cover the period from the 1970, or '80s, until the 2000s (Shannon et at., 2003; Heymans et al., 2004, Roux & …
-
Addressing the impact of the EU CFP landing obligation on the northern North Sea ecosystem and Shetland fisheries in a changing climate.
… Obligation (LO) and climate change. Building an Ecopath with Ecosim (EwE) model of northern North Sea (International Council for the Exploration of the Sea ICES division IVa) allowed for secondary consequences of how the LO may affect ecosystem dynamics and fisheries in the area; and how impacts …
-
Modelling the food web in the Irish Sea in the context of a depleted commercial fish community
… This thesis describes the development of an Ecopath with Ecosim (EwE) food web model for the Irish Sea as part of WKIrish. The EwE model follows the best practices for model construction, like many of the more recently developed models, yet it stands apart from others due to its creation at …
-
Changes in food web structure and energy flow in kelp forest ecosystems on the south-west coast of South Africa following the invasion of Jasus lalandii
… algae. Using the trophic modelling software Ecopath with Ecosim, baseline models of the pre- and Post-invasion systems were created to better understand trophic pathways between the two different states and assess how fishing pressure may have driven the shift in ecosystem state. Using the …
-
Using seasonal mass-balanced models of the Algoa Bay ecosystem to investigate African penguin and small pelagic fish interactions
Ecopath with Ecosim is a modeling software that allows the creation of mass-balanced models of the trophic flows of an ecosystem to explore the past and present impacts of fishing and environmental change on the trophic flows of a given food web. Currently, Algoa Bay supports the world’s largest …
-
An ecosystem-based approach to study two dolphin populations around the island of Kalamos, Ionian Sea, Greece
… rates. I constructed an ecosystem model using Ecopath with Ecosim for the northeastern Ionian Sea to explain the two different abundance trends of these species of dolphins, and the trophic interactions with their prey and with the fisheries. The Ecopath model was built for the year 1964, …
-
Modelización ecológica del Golfo de Cádiz: Relaciones Tróficas, Análisis de la Estructura de la Comunidad e Impacto de la Pesca en el ecosistema
… el mundo, es la modelización mediante el enfoque Ecopath with Ecosim (EwE). Su aplicación, proporciona información sobre la estructura de la red trófica, el funcionamiento y las propiedades emergentes de un ecosistema explotado, basada en las interacciones tróficas que tienen lugar entre todos los …
-
Modelling South African cold-water coral habitats
… little is known about energy flows associated with these habitats. The degree to which the benthic ecosystems containing cold-water corals are linked to the overlying pelagic ecosystems is also poorly understood. Observational studies have indicated that fish abundance is greater in the waters …
-
Spatialised ecosystem modelling to evaluate the influences of marine protected areas and provisioning ecotourism on the foraging and distributional response of top predators from Mossel Bay to Algoa Bay, South Africa
… response of top predators in the system. The Ecopath with Ecosim (EwE) and Ecospace modelling framework was utilised to investigate the distributional response of sharks and top predators on the South-East coast to the introduction of two new MPAs (in 2019) and seasonal provisioning for shark …
-
Assessing the effects of internal (trophic structure) and external (fishing and environment) forcing factors on fisheries off central Chile : basis for an ecosystem approach to management
… (climate) and anthropogenic (fishing) forcing, with their relative effects poorly known, but hypothesised to strongly depend on internal food web structure (i.e., who eats and controls whom). This thesis approaches relevant ecological considerations for an ecosystem approach to fisheries in the …
-
Walking the bridge from single- to multi-species approaches in Southern African fisheries management
Fisheries management worldwide is in flux with calls for an EAF (Ecosystem Approach to Fisheries) needing to be balanced with the ongoing requirements to provide timeous and realistic assessment-based advice for management ( often with major economic and social consequences), that is typically …