The influence of persistent individual differences and age at maturity on effective population size.
نویسندگان
چکیده
Ratios of effective populations size, N(e), to census population size, N, are used as a measure of genetic drift in populations. Several life-history parameters have been shown to affect these ratios, including mating system and age at sexual maturation. Using a stochastic matrix model, we examine how different levels of persistent individual differences in mating success among males may affect N(e)/N, and how this relates to generation time. Individual differences of this type are shown to cause a lower N(e)/N ratio than would be expected when mating is independent among seasons. Examining the way in which age at maturity affects N(e)/N, we find that both the direction and magnitude of the effect depends on the survival rate of juveniles in the population. In particular, when maturation is delayed, lowered juvenile survival causes higher levels of genetic drift. In addition, predicted shifts in N(e)/N with changing age at maturity are shown to be dependent on which of the commonly used definitions of census population size, N, is employed. Our results demonstrate that patterns of mating success, as well as juvenile survival probabilities, have substantial effects on rates of genetic drift.
منابع مشابه
Assessment of Facial and Cranial Development in Shirvanian Kurmanj Population Based on the Mean Biometric Factors from Birth to Maturity Age
Purpose: The aim of this study was to determine cranial & facial anthropometric Ratios and assessment of cranial & facial development in Shirvanian kurmanj population. Materials and Methods: This cross sectional analytical study was conducted randomly on 137 boys from shirvan, with normal face patterns. Facial and cranial ratios was estimated and compared. Data were analyzed by SPSS software. T...
متن کاملMixed milt fertilization of endangered Caspian brown trout Salmo trutta caspius influences effective population size of breeders
The maintenance of the endangered Caspian brown trout Salmo trutta caspius populations in Iran depends on its artificial breeding. There is no information on how current hatchery breeding protocol influences effective population size of breeders (Ne), which is a critical parameter to maintain genetic diversity in future generations. The current hatchery protocol (CHP) was comparatively evaluate...
متن کاملA Sociological Study on the Effective Factors on Value Changes among the Youth
This research explains and analyzes the value changes among the youth (15-29) years of age living in Mazandaran (Northern Iran). The survey, the quessionare and interview were used and after gathering the data, the whole research was statistically analyzed. The framework theory was including such as functionalism, structuralism, conflict and symbolic interactions. The data show that there are s...
متن کاملReproduction biology of chub living in Lake Hafik
In this study, the reproductive biology of chub population in Hafik Lake was investigated. 242 samples were caught between April and November 2009. The age of S. cephalus samples were found to range between I-VIII in addition, 153 of them were female and 89 were male. Their fork lengths changed between 114-332 mm, and body weights were between 22.5 and 550.3 g. Male specimens were dete...
متن کاملInfluence of 1-aminoethoxyvinylglycine hydrochloride and α-naphthalene acetic acid on fruit retention, quality, evolved ethylene, and respiration in apples
Effects of 1-aminoethoxyvinylglycine hydrochloride (AVG or Aviglycine HCl or ReTain) and α-naphthalene acetic acid (NAA) on fruit retention, fruit quality, eveloved ethylene, and respiration in ‘Rome Beauty’ and three ‘Delicious’ apple cultivars (Malus domestica Borkh.) were studied. The experimental trees were treated with either AVG, applied at 120 g a.i. per 935 L. ha-1 or NAA, applied at t...
متن کاملذخیره 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 ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Proceedings. Biological sciences
دوره 278 1722 شماره
صفحات -
تاریخ انتشار 2011