Age at Sexual Maturity
Canonical correlation analysis for studying the relationship between egg production traits and body weight, egg weight and age at sexual maturity in layers
... Egg numbers were recorded daily from onset of lay (22 wk) to 40 wk of age. All birds were weighed at sexual maturity age (BW) which was obtained in- dividually according to the laying of the ...
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Utility of the Transition Phase in Earplugs of the North Pacific Common Minke Whale as an Indicator of Age at Sexual Maturity
... sexes. Age at the inflection point of regression lines almost corresponds to the age at first ...Mean age at Tp in both sexes was slightly lower than age at the crossing point of regression ...
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INHERITANCE OF AGE AT SEXUAL MATURITY IN THE DOMESTIC FOWL
... No birds were obtained in which the sex-linked early maturity factor was acting alone but the cross of a late maturity male to early maturity females produced female of[r] ...
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GENETIC EFFECTS OF CUMULATIVE MATERNAL IRRADIATION ON GROWTH AND AGE AT SEXUAL MATURITY IN RATS
... The differences between the adjusted means of the control and irradiated groups were subjected to weighted multiple regression analysis to estimate the average homozyg[r] ...
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GENETIC EFFECTS OF SPERMATOGONIAL IRRADIATION ON GROWTH AND AGE AT SEXUAL MATURITY IN RATS
... Analyses of the means, the within-litter variances, and the covariances between offspring and parent, indicate that the average heterozygous effects of induced mutations are[r] ...
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Geographic variation in life history traits : growth season affects age structure, egg size and clutch size in Andrew’s toad (Bufo andrewsi)
... larger age at sexual maturity and mean age at shorter growth season in ...the age of 1-2 years, and the average age of reproducing toads was ...the age of 3-4 years, and ...
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Productive, reproductive performance and biochemical parameters of short-term divergently selected Japanese quail lines and their reciprocal crosses
... at sexual maturity time, age at sexual maturity, number of eggs (from 50 to 100 days old), mean of egg weight, percentage of fertility and hatchability in each group (two lines and ...
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Geographic variation in life-history traits: growth season affects age structure, egg size and clutch size in Andrew’s toad (Bufo andrewsi)
... larger age at sexual maturity and mean age at shorter growth season in ...the age of 1-2 years, and the average age of reproducing toads was ...the age of 3-4 years, and ...
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THE IMPORTANCE OF INTERACTIONS DETECTED BETWEEN GENOTYPE AND ENVIRONMENTAL FACTORS FOR CHARACTERS OF ECONOMIC SIGNIFICANCE IN POULTRY
... The rearing treatment had a very large effect on traits such as body weight and age at sexual maturity but little effect on the number of eggs laid over a standard[r] ...
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Prediction of the Weight and Number of Eggs in Mazandaran Native Fowl Using Artificial Neural Network
... Traditional poultry production has changed to a considerable industry after few decades. Now, poultry industry is one of the main sectors to obtain the required protein for human consumption. Prediction of the weight and ...
6
Estimation of genetic parameters for productive and reproductive traits in Esfahan native chickens
... between age at first egg and egg weight, thus increased age at sexual maturity could result in a reduction in egg number while having a pos- itive effect on the egg ...between age and ...
5
Prediction of the Weight and Number of Eggs in Mazandaran Native Fowl Using Artificial Neural Network
... of sexual maturity, age of sexual maturity, number of eggs, egg weight, order of giving birth to chicken and birth weight and age period of 8weeks and 12 ...and sexual ...
5
Unaltered sequence of dental, skeletal, and sexual maturity in domestic dogs compared to the wolf
... of sexual maturity in domestic dogs compared to wolves may lie in the social system of these two ...of sexual maturity in subordinate pack members through dominance of the alpha-female, young ...
8
A SEX-LINKED GENE CONTROLLING THE ONSET OF SEXUAL MATURITY IN FEMALE AND MALE PLATYFISH (XIPHOPHORUS MACULATUS), FECUNDITY IN FEMALES AND ADULT SIZE IN MALES
... There was no evidence for a minimum size for sexual maturity; in contrast to the three other genotypes of females examined, the immature N’ N’ fish of any age group were not conc[r] ...
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Long-term Results of Treatment With Low-Dose Fluoxymesterone in Constitutional Delay of Growth and Puberty and in Genetic Short Stature
... Abbreviations; CA, chronological age; HA, height age; BA, bone age; SA, sexual age; HPBI’, height prediction by Bayley-Pinneau; HPSMI, height prediction by sexual maturity index; HI, fin[r] ...
7
Time-evolution of age-dependent mortality patterns in mathematical model of heterogeneous human population
... different age groups) and consequently the chance of death ...wide age-range of lifespan, that is from sexual maturity to considerably old ...at age as an exponential function of ...
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Investigation of Some Population Parameters of the Tench (Tinca tinca L., 1758) Inhabiting Beyşehir Lake (Konya-Turkey)
... According to Lucowicz (1979), there are differences between the growths of males and females of T. tinca individuals reaching sexual maturity. Altındağ et al. (1998) have determined that females have higher ...
7
Median ages at stages of sexual maturity and excess weight in school children
... Studies have shown a dramatic increase in serum leptin in females who start puberty early, at 7 years of age, and that continues as puberty progresses, until at least 15 years of age [38]. In contrast, in ...
6
Adolescent Sexual Behavior in an Urban Area of a Resource Limited African Country, Cameroon
... mean age at first sex was ...before age 16 years. Many studies describe a progressively de- creasing age at first sexual intercourse [4] [11] ...
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SOME ASPECTS ON THE REPRODUCTIVE BIOLOGY OF AN ENDEMIC CATFISH, ARIUS MANILLENSIS VALENCIENNES, 1840 (SILURIFORMES: ARIIDAE), OF LAGUNA DE BAY, PHILIPPINES
... 13 occurs at around 20 cm in body length. Very little seasonal variation has been reported for the mature testes of ariids, being small and elongated for the most time (Lee, 1937; Tobor, 1969; Bishop et al., 1980. BW ...
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