Selective Grazing by a Tropical Copepod (Notodiaptomus iheringi) Facilitates Microcystis Dominance

This paper reports the results of three cafeteria trials used to study palatability variation between the sex phenotypes of bladder saltbush (Atriplex vesicaria Heward ex Benth.). The results of the first trial show that Merino sheep preferentially grazed female samples compared to male ones, which supported earlier paddock-scale grazing trials and observations. In the second trial, the removal of male flower spikes led to increased consumption of male samples, suggesting that male flower spikes contain a grazing deterrent. The third trial showed that sheep were able to detect male material with or without spikes even when it was completely hidden within female plant material. In combination with observations made during the trials, these results suggest that there is a grazing deterrent present in male plants and that sheep use the male flower spike primarily as a visual cue when making grazing decisions.

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Selective grazing behaviour of chironomids on microalgae under pesticide pressure

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.138673 ◽

2020 ◽

Vol 730 ◽

pp. 138673 ◽

Cited By ~ 1

Author(s):

Julie Neury-Ormanni ◽

Caroline Doose ◽

Nabil Majdi ◽

Jacky Vedrenne ◽

Walter Traunspurger ◽

...

Keyword(s):

Selective Grazing ◽

Grazing Behaviour

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Effect of Selective Grazing by Sheep on the Control of Leafy Spurge (Euphorbia esula L.)

Journal of Range Management ◽

10.2307/3894950 ◽

1960 ◽

Vol 13 (4) ◽

pp. 192 ◽

Cited By ~ 17

Author(s):

A. Johnston ◽

R. W. Peake

Keyword(s):

Leafy Spurge ◽

Euphorbia Esula ◽

Selective Grazing

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Study on the Selective Grazing of Zooplankton in Plankton Ecosystem

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.864-867.17 ◽

2013 ◽

Vol 864-867 ◽

pp. 17-21

Author(s):

Yan Lin Zheng ◽

Zhuo Ying Lv

Keyword(s):

Harmful Algal Blooms ◽

Algal Blooms ◽

Marine Ecosystem ◽

Laboratory Data ◽

Ecosystem Dynamics ◽

Human Environment ◽

Grazing Behavior ◽

Toxic Phytoplankton ◽

Type Iv ◽

Selective Grazing

Harmful algal blooms (Habs) caused great harm to the human environment. Habs occurrence was connected with other types of plankton. This relationship may be restrictive, and may also be promotional. Selectivity of zooplankton grazing has an important influence on the Habs. The behavior of zooplankton selective grazing was studied in the plankton ecosystem formed by three populations of nontoxic phytoplankton-toxic phytoplankton-zooplankton (NTP-TTP-Z) system. The selective grazing function of zooplankton on toxic phytoplankton and non-toxic phytoplankton was built based on Holling type IV functional response. Numerical simulation was given depending on the laboratory data. Results show that the models nicely explained the selective grazing behavior of zooplankton in the three species ecosystem, and provided key parameters for the marine ecosystem dynamics models.

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