Results 21 to 30 of about 12,720,243 (353)

Population dynamic consequences of fearful prey in a spatiotemporal predator-prey system.

open access: yesMathematical biosciences and engineering : MBE, 2018
Fear can influence the overall population size of an ecosystem and an important drive for change in nature. It evokes a vast array of responses spanning the physiology, morphology, ontogeny and the behavior of scared organisms.
R. K. Upadhyay, Swati Mishra
semanticscholar   +1 more source

Diurnal variations in the diet of 0 to 3 years old Atlantic salmon Salmo salar L. under semiarctic summer conditions in the Alta River, Northern Norway

open access: yesFauna Norvegica, 1986
The stomach contents of 0 to 3 year old salmon were investigated throughout a single 20 hour period in each of July, August and September 1981. There was no marked diurnal variation in stomach content of fry, while that of parr indicated nocturnal ...
Helge Huru
doaj   +1 more source

Recent Population Dynamics of Japanese Encephalitis Virus

open access: yesViruses, 2023
Japanese encephalitis virus (JEV) causes acute viral encephalitis in humans and reproductive disorders in pigs. JEV emerged during the 1870s in Japan, and since that time, JEV has been transmitted exclusively throughout Asia, according to known reporting
Jinpeng Xu   +8 more
doaj   +1 more source

Human population dynamics

open access: yesAnnals of Human Biology, 2001
Time-series analysis of parish register series can be used to study human population dynamics at three different levels: (i) The metapopulation of preindustrial rural England. A short wavelength, exogenous oscillation in the burials series of 404 parishes can be detected which, it is suggested, was driven by a cycle of malnutrition associated with ...
Duncan, S, Duncan, C, Scott, S
openaire   +2 more sources

Recoveries of Common Seals Phoca vitulina L. tagged along the Norwegian coast

open access: yesFauna Norvegica, 1988
A total of 296 Common Seals have been tagged along the Norwegian coast in the period from 1978 to 1987. Thirty six of the tagged seals have been recovered. Twenty six during their first year of life.
Øystein Wiig, Nils Øien
doaj   +1 more source

Evaluation of Trichogramma cacaeciae (Hymenoptera: Trichogrammatidae) and Blattisocius mali (Mesostigmata: Blattisociidae) in the Post-Harvest Biological Control of the Potato Tuber Moth (Lepidoptera: Gelechiidae): Use of Sigmoid Functions

open access: yesAgriculture, 2022
The potato tuber moth (PTM), Phthorimaea operculella, is the main potato pest in the world, having managed to adapt to a wide range of climatic conditions, and causing damage to stored tubers.
Yohan Solano-Rojas   +5 more
doaj   +1 more source

Associative memory scheme for genetic algorithms in dynamic environments [PDF]

open access: yes, 2006
Copyright @ Springer-Verlag Berlin Heidelberg 2006.In recent years dynamic optimization problems have attracted a growing interest from the community of genetic algorithms with several approaches developed to address these problems, of which the memory ...
A. Karaman   +3 more
core   +4 more sources

Stock assessment and exploitation of Atlantic salmon Salmo salar L. in the river Drammenselv

open access: yesFauna Norvegica, 1986
In 1985 the total salmon run and the exploitation rate in the river Drammenselv were estimated by combining catch statistics, counts of ascending salmon in a salmon ladder at Hellefoss, and a tagging-recapture experiment of the spawning stock below the ...
Lars P. Hansen   +2 more
doaj   +1 more source

Ecological ramifications of adaptation to size-selective mortality

open access: yesRoyal Society Open Science, 2021
Size-selective mortality due to harvesting is a threat to numerous exploited species, but how it affects the ecosystem remains largely unexplored. Here, we used a pond mesocosm experiment to assess how evolutionary responses to opposite size-selective ...
Charlotte Evangelista   +7 more
doaj   +1 more source

Quantification of dynamic excitation potential of pedestrian population crossing footbridges [PDF]

open access: yes, 2011
Due to their slenderness, many modern footbridges may vibrate significantly under pedestrian traffic. Consequently, the vibration serviceability of these structures under human-induced dynamic loading is becoming their governing design criterion.
Pavić, Aleksandar, Živanović, Stana
core   +2 more sources

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