Experimental Ecology of the Feeding of Fishes

Mansueti, Romeo J.; Ivlev, V. S.; Scott, D. B. C.; Winberg, G. G.; Fry, F. E. J.; Ricker, W. R.

doi:10.2307/1350423

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the preference experiment, the prey preference index (C i ) of predators to various stages could be expressed as (Eq. 1) (Ivlev et al 1962;Zhou et al 1987), where F i was the proportion of the i th prey type in the environment, and Q i was the proportion of predation of the i th prey type by the predator.…”

Section: Discussionmentioning

confidence: 99%

Predatory mite Amblyseius orientalis prefers egg stage and low density of Carpoglyphus lactis prey

Wei,

Liu,

Sheng

et al. 2023

Exp Appl Acarol

View full text Add to dashboard Cite

Amblyseius orientalis (Ehara) (Acari: Phytoseiidae) is an effective predatory mite for spider mites control on fruit trees in China. In recent decade, it can be produced commercially and intensively via Carpoglyphus lactis (Linnaeus) in natural enemy factory. During the practical predator production, ratio of predatory mites to their prey was found critical for the population increase of A. orientalis in large-scale rearing. In this study, we investigated the predatory capacity of A. orientalis on different developmental stages of the prey C. lactis and the effect of prey numbers on predator reproductions. The maximum predation number of A. orientalis adults on C. lactis adults was 2.21 at the lowest density of 5 and on C. lactis eggs was 45.07 at the highest density of 60. The preference index C i of A. orientalis on C. lactis eggs and adults was 0.4312 and − 0.9249, respectively, suggesting that A. orientalis preferred eggs to adults of C. lactis. A. orientalis could reproduce when it preyed either eggs or deutonymphs of C. lactis. However, the fecundity of the predatory mites is not proportional to the provided prey density in a week.Higher density of prey deutonymphs resulted in lower fecundity, while more prey eggs can bring higher fecundity of A. orientalis. Therefore, our study indicated that suitable density and developmental stage of prey is the basis for A. orientalis production in a large scale.

show abstract

Section: Discussionmentioning

confidence: 99%

Predatory mite Amblyseius orientalis prefers egg stage and low density of Carpoglyphus lactis prey

Wei,

Liu,

Sheng

et al. 2023

Exp Appl Acarol

View full text Add to dashboard Cite

show abstract

Predatory mite Amblyseius orientalis prefers egg stage and low density of prey Carpoglyphus lactis

Wei

Liu

Sheng³

et al. 2022

Preprint

View full text Add to dashboard Cite

Amblyseius orientalis (Ehara) (Acari: Phytoseiidae) is an effective predatory mite for spider mites control on fruit trees in China. In recent decade, it can be produced commercially and intensively via Carpoglyphus lactis (Linnaeus) in natural enemy factory. During the practical predator production, ratio of predatory mites to their prey was found critical for the population increase of A. orientalis in large-scale rearing. In this study, we investigated the predatory capacity of A. orientalis on different developmental stages of the prey C. lactis and the effect of prey numbers on predator reproductions. The maximum predation number of A. orientalis adults on C. lactis adults was 2.21 at the lowest density of 5 and on C. lactis eggs was 45.07 at the highest density of 60. The preference index Ci of A. orientalis on C. lactis eggs and adults was 0.4312 and − 0.9249, respectively, suggesting that A. orientalis preferred eggs to adults of C. lactis. A. orientalis could reproduce when it preyed either eggs or deutonymphs of C. lactis. However, the fecundity of the predatory mites is not proportional to the provided prey density in a week. Higher density of prey deutonymphs resulted in lower fecundity, while more prey eggs can bring higher fecundity of A. orientalis. Therefore, our study indicated that suitable density and developmental stage of prey is the basis for A. orientalis production in a large scale.

show abstract

Global Stability and Bifurcation Analysis of a Virus Infection Model with Nonlinear Incidence and Multiple Delays

Xu,

Huang

2023

Fractal Fract

View full text Add to dashboard Cite

In order to investigate the impact of general nonlinear incidence, cellular infection, and multiple time delays on the dynamical behaviors of a virus infection model, a within-host model describing the virus infection is formulated and studied by taking these factors into account in a single model. Qualitative analysis of the global properties of the equilibria is carried out by utilizing the methods of Lyapunov functionals. The existence and properties of local and global Hopf bifurcations are discussed by regarding immune delay as the bifurcation parameter via the normal form, center manifold theory, and global Hopf bifurcation theorem. This work reveals that the immune delay is mainly responsible for the existence of the Hopf bifurcation and rich dynamics rather than the intracellular delays, and the general nonlinear incidence does not change the global stability of the equilibria. Moreover, ignoring the cell-to-cell infection may underevaluate the infection risk. Numerical simulations are carried out for three kinds of incidence function forms to show the rich dynamics of the model. The bifurcation diagrams and the identification of the stability region show that increasing the immune delay can destabilize the immunity-activated equilibrium and induce a Hopf bifurcation, stability switches, and oscillation solutions. The obtained results are a generalization of some existing models.

show abstract

Experimental Ecology of the Feeding of Fishes

Cited by 3 publications

References 0 publications

Predatory mite Amblyseius orientalis prefers egg stage and low density of Carpoglyphus lactis prey

Predatory mite Amblyseius orientalis prefers egg stage and low density of Carpoglyphus lactis prey

Predatory mite Amblyseius orientalis prefers egg stage and low density of prey Carpoglyphus lactis

Global Stability and Bifurcation Analysis of a Virus Infection Model with Nonlinear Incidence and Multiple Delays

Contact Info

Product

Resources

About