Ovarian dynamics and host use.

نویسنده

  • D R Papaj
چکیده

Oviposition behavior in herbivorous and frugivorous insects and parasitoids is dynamic at the level of the individual, responding to variation in host quality and availability. Patterns of variation in egg load in response to host presence and quality suggest that ovarian development also responds to variation in the host environment. Ovarian dynamics are mediated by feedback from oviposition, by host feeding, and by sensory input from the host. The last of these mechanisms, host sensory cuing, is known to occur in three major orders and provides strong evidence that ovarian dynamics are adaptive by design. Conditions favoring host effects on ovarian development include trade-offs between egg production and either survival or dispersal, uncertainty in the host environment, and a correlation in host conditions between the time that oogenesis is initiated and the time that eggs are laid. Some host defenses block ovarian development, suggesting that ovarian dynamics in host-specific insects should be viewed from a coevolutionary perspective.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Ovarian dynamics in relation to host quality in the Walnut-infesting Fly, Rhagoletis juglandis

1. Reproductive behaviour is routinely studied with a view towards characterizing how an animal responds to variation in resource abundance and quality. This characterization is less commonly made with respect to reproductive physiology. 2. In the Walnut-infesting Fly, Rhagoletis juglandis , ovarian development is cued by the presence of the host fruit resource. In this study, I examined how ov...

متن کامل

A quantitative framework for ovarian dynamics

1. Ovarian dynamics describe the highly complex interplay between egg maturation, oviposition, egg resorption and the factors affecting them. While these processes have been intensively studied, further progress has been impeded by the lack of generally applicable quantitative tools to analyse experimental data. 2. The purpose of this study is to provide a quantitative framework based on a stat...

متن کامل

Influence of Interface Thermal Resistance on Relaxation Dynamics of Metal-Dielectric Nanocomposite Materials under Ultrafast Pulse Laser Excitation

Nanocomposite materials, including noble metal nanoparticles embedded in a dielectric host medium, are interesting because of their optical properties linked to surface plasmon resonance phenomena. For studding of nonlinear optical properties and/or energy transfer process, these materials may be excited by ultrashort pulse laser with a temporal width varying from some femtoseconds to some hund...

متن کامل

Protective Effect of Human Menopausal Gonadotropins on Rat Ovarian Structure Following Use of Nandrolone Decanoate: From a Histological Standpoint

Background and Aim: Nandrolone decanoate is known as one of the most destructive environmental factors in the reproductive system in men and women. In this study, we assessed the protective effect of gonadotropins (hMG) on histological changes of rat ovarian structure. Materials and Methods: 50 female rats were divided into 5 groups, including control, nandrolone decanoate (ND), hMG, ND + hMG, ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Annual review of entomology

دوره 45  شماره 

صفحات  -

تاریخ انتشار 2000