Zooplanktivory by Praunus flexuosus (Crustacea:Mysidacea):functional responses and prey selection in relation to prey escape responses

Spatial responses to predators vary with prey escape mode

pragmatic transfer in compliment responses and chastisements by iranian learners of english

فرهنگ های گوناگون دریافت ها و تعبیر های مختلفی از تناسب و ادب دارند. بنابراین، ارتباط میان فرهنگی خطرات ذاتی خطای ارتباطی را نشان می دهد. این پژوهش به منظور تعیین وقوع انتقال منظورشناختی زبان در زبان بینابینی زبان آموزان ایرانی، اختلاف منظورشناختی زبان را بین فارسی و انگلیسی در کنش های کلامی پاسخ تحسین و انتقاد بررسی می کند.داده ها از میان 33 آمریکایی انگلیسی زبان، 85 زبان آموز ایرانی در سطوح م...

The three-dimensional prey field of the northern krill, Meganyctiphanes norvegica, and the escape responses of their copepod prey

In the north Atlantic, Meganyctiphanes norvegica feeds predominantly on copepods, including Calanus spp. To quantify its perceptual field for prey, and the sensory systems underlying prey detection, the responses of tethered krill to free-swimming Calanus spp. were observed in 3D using silhouette video imaging. An attack-which occurred despite the krill's being tethered-was characterized by a p...

Effects of a Predator on Prey Metamorphosis: Plastic Responses by Prey or Selective Mortality?

Models for organisms with complex life cycles predict decreased size at, and altered time to, metamorphosis for organisms experiencing greater mortality rate during the larval stages. We tested this prediction by exposing larvae of the tree hole mosquito, Aedes triseriatus, to predation by the mosquito Toxorhynchites rutilus in a series of five experiments. Populations both sympatric and allopa...

Permanence of Periodic Predator-Prey System with Functional Responses and Stage Structure for Prey

A stage-structured three-species predator-prey model with Beddington-DeAngelis and Holling II functional response is introduced. Based on the comparison theorem, sufficient and necessary conditions which guarantee the predator and the prey species to be permanent are obtained. An example is also presented to illustrate our main results. Copyright q 2008 Can-Yun Huang et al. This is an open acce...