Time-Delayed Subsidies: Interspecies Population Effects in Salmon
نویسندگان
چکیده
منابع مشابه
Time-Delayed Subsidies: Interspecies Population Effects in Salmon
Cross-boundary nutrient inputs can enhance and sustain populations of organisms in nutrient-poor recipient ecosystems. For example, Pacific salmon (Oncorhynchus spp.) can deliver large amounts of marine-derived nutrients to freshwater ecosystems through their eggs, excretion, or carcasses. This has led to the question of whether nutrients from one generation of salmon can benefit juvenile salmo...
متن کاملEffects of experimentally added salmon subsidies on resident fishes via direct and indirect pathways
Artificial additions of nutrients of differing forms such as salmon carcasses and analog pellets (i.e. pasteurized fishmeal) have been proposed as a means of stimulating aquatic productivity and enhancing populations of anadromous and resident fishes. Nutrient mitigation to enhance fish production in stream ecosystems assumes that the central pathway by which effects occur is bottomup, through ...
متن کاملSea lice and salmon population dynamics: effects of exposure time for migratory fish.
The ecological impact of parasite transmission from fish farms is probably mediated by the migration of wild fishes, which determines the period of exposure to parasites. For Pacific salmon and the parasitic sea louse, Lepeophtheirus salmonis, analysis of the exposure period may resolve conflicting observations of epizootic mortality in field studies and parasite rejection in experiments. This ...
متن کاملTime Delayed Dynamic Model of Renewable Resource and Population
This paper reconsiders a "Ricardo-Malthus" dynamic model of population and renewable resource developed by Brander and Taylor [1998]. To this end, it sheds light on a delay in production, a key feature of long-run evolution in a pre-industrial economic society. It is clear that the delay has a considerable effect on long-run dynamics of natural resource and population This notwithstanding, many...
متن کاملPeriodic Solutions for a Delayed Population Model on Time Scales
This paper deals with a delayed single population model on time scales. With the assistance of coincidence degree theory, sufficient conditions for existence of periodic solutions are obtained. Furthermore, the better estimations for bounds of periodic solutions are established. Keywords—Coincidence degree, continuation theorem, periodic solutions, time scales
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: PLoS ONE
سال: 2014
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0098951