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Diet composition and trophic levels of marine mammals
Type: Journal Article
Standardized diet compositions were derived for 97 species of marine mammals from published accounts of stomach contents as well as from morphological, behavioural and other information. Diet was apportioned among eight ...
The ECOPATH II software or how we can gain from working together
Type: Journal Article
Problems involved in the development of ecosystem models are discussed, considering in particular the use of the ECOPATH II software and the approach used at ICLARM in the project "Global comparisons of trophic aquatic ...
Changes in models of aquatic ecosystems approaching carrying capacity
Type: Journal Article
Using a top-down modeling approach, published mass-balance models of trophic interactions and state variables in the western central Pacific Ocean and the northern Gulf of Mexico shelf were used to explore how large increases ...
Structuring dynamic models of exploited ecosystems from trophic mass-balance assessment
Type: Journal Article
The linear equations that describe trophic fluxes in mass-balance, equilibrium assessments of ecosystems (such as in the ECOPATH approach) can be re-expressed as differential equations defining trophic interactions as ...
Emergy-based ascendency
Type: Journal Article
Ascendency is a system indicator used for describing flow characteristics of ecosystems. Experience shows, however, that ascendency is primarily a function of the flow characteristics at the lowest trophic levels. This is ...
Towards quantification of ecological sustainability in farming systems analysis
Type: Journal Article
A tentative list of ecological attributes; diversity, cycling, stability and capacity, is proposed for quantification and ranking of farming systems along a hypothetical scale of increasing ecological sustainability. The ...
Competition between fisheries and marine mammals for prey and primary production in the Pacific Ocean
Type: Journal Article
The degree of competition between fisheries and marine mammals in the Pacific Ocean was estimated for 7 statistical areas defined by the Food and Agriculture Organization of the United Nations (FAO). Catch statistics ...