Results 41 to 50 of about 456,694 (300)

To the problem of owls’ (Strigiformes) diet selectivity

open access: yesБіологічні студії, 2012
A large body of literature covers the trophic connections of owls nowadays, but detailed studies of the diet selectivity are rather race. Any attempt to determine the cha­racter of owls’ diet selectivity, its influence on prey-species assemblages ...
S. V. Zaika
doaj   +1 more source

DNA Metabarcoding Revealed Interspecific Dietary Difference and Prey Selectivity in Juvenile Horseshoe Crabs Carcinoscorpius rotundicauda and Tachypleus tridentatus From Hong Kong

open access: yesFrontiers in Marine Science, 2021
Horseshoe crabs provide important ecological services including bioturbation and linking of food web in the shallow waters, but their populations are declining globally, leading to major concerns on conservation of these iconic animals.
Bo Yee Lee   +5 more
doaj   +1 more source

COX-2 selective inhibition reverses the trophic properties of gastrin in colorectal cancer [PDF]

open access: yesBritish Journal of Cancer, 2002
Gastrin is a gastrointestinal peptide that possesses potent trophic properties on both normal and neoplastic cells of gastrointestinal origin. Previous studies have indicated that chronic hypergastrinaemia increases the risk of colorectal cancer and cancer growth and that interruption of the effects of gastrin could be a potential target in the ...
Yao, M, Song, D H, Rana, B, Wolfe, M M
openaire   +2 more sources

Do trophic subsidies affect the outcome of introductions of a non-native freshwater fish? [PDF]

open access: yes, 2013
Understanding how environmental variables and human disturbances influence the outcomes of introductions of non-native freshwater fish is integral to their risk management. This can be complex in freshwater ecosystems that receive subsidies that increase
Allen, R.   +7 more
core   +1 more source

Is the red spotted green frog Hypsiboas punctatus (Anura: Hylidae) selecting its preys?: The importance of prey availability

open access: yesRevista de Biología Tropical, 2009
The study of the feeding ecology of amphibians is an old issue in herpetology. Notwithstanding, the lack of food resources data in many studies of amphibians feeding has lead to partial understanding of frog feeding strategies.
Javier A López   +3 more
doaj   +2 more sources

Appendix H. Analysis of single-trophic-level and multi-trophic-level studies at trophic distances of 1.

open access: yes, 2016
Analysis of single-trophic-level and multi-trophic-level studies at trophic distances of ...
Kenneth O. Spence (2932809)   +5 more
core   +1 more source

The selectivity, voltage-dependence and acid sensitivity of the tandem pore potassium channel TASK-1 : contributions of the pore domains [PDF]

open access: yes, 2007
We have investigated the contribution to ionic selectivity of residues in the selectivity filter and pore helices of the P1 and P2 domains in the acid sensitive potassium channel TASK-1.
Sutcliffe, M. J.   +14 more
core   +1 more source

Eutrophication parameters and Carlson-type trophic state indices in selected Pomeranian lakes [PDF]

open access: yesLimnological Review, 2011
Eutrophication parameters and Carlson-type trophic state indices in selected Pomeranian lakesThe objective of the study (2007-09) was to determine the current trophic state of eight selected lakes - Rybiec, Niezabyszewskie, Czarne, Chotkowskie, Obłęże, Jasień Południowy, Jasień Północny, Jeleń - based on Carlson-type indices (TSIs) and, to examine the ...
Jarosiewicz, Anna   +2 more
openaire   +1 more source

Amino acid and nucleotide metabolism shape the selection of trophic levels in animals [PDF]

open access: yes, 2021
Abstract What an animal eats determines its trophic level (TL) in the food web. The diet of high-TL animals is thought to contain more energy because it contains higher levels of lipids. This however has not been systematically examined in the context of comprehensive metabolic networks of different animals. Here, we reconstruct species-
Rosemary Yu, Hao Wang, Jens Nielsen
openaire   +1 more source

Water quality assessment, trophic classification and water resources management [PDF]

open access: yes, 2010
Quantification of water quality (WQ) is an integral part of scientifically based water resources management. The main objective of this study was comparative analysis of two approaches applied for quantitative assessment of WQ: the trophic level index ...
Gal, Gideon   +4 more
core   +1 more source

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