Selecting for Age at First Egg: Effects on Social dominance ,

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Selecting Egg and Sperm Donors: The Role of Age, Social Class, Ethnicity, Height and Personality

This paper reports two studies where respondents were asked to help a friend make a decision about egg and sperm donation. In both studies they were presented with 16 hypothetical person’s which they were asked to rate for suitability. In the first study on egg donation the hypothetical donors differed on age (18 20 years vs. 30 33 years), social class (I/II vs. III/IV), Ethnicity (Caucasian vs...

متن کامل

Effects of Dominance on Vigilance in Avian Social Groups

ambient temperatures, long nights, and unpredictable food supplies. Two evolutionary forces are thought o affect an individual's survivorship during winter: risk of starvation and risk of predation (Lima 1986, McNamara and Houston 1990, Grubb and Pravosudov 1994a, Pravosudov and Grubb 1997). Foraging and vigilance for predators appear to be mutually exclusive forms of behavior that an animal mu...

متن کامل

Discrimination learning in horses: effects of breed, age and social dominance.

The discrimination learning ability of Quarter Horses and Thoroughbreds was compared by means of visual cues in a three-choice test with food as a reward. Quarter Horses learned significantly faster than Thoroughbreds, and learning progressed more rapidly for both breeds in a second discrimination task. Significant negative correlations were observed between age and rate of learning. Quarter Ho...

متن کامل

Social Carrier Recommendation for Selecting

The proliferation of telecommunication services and the need to manage quality of service on an end-to-end basis require an approach for automatically selecting services that provide suucient quality of service at minimal cost. An agent-based approach is appropriate for such a purpose. For this reason, this paper presents a social carrier recommendation method, which is an essential component o...

متن کامل

the effects of multiple intelligences (focus on musical, visual, and linguistic) and direct instruction on learning grammar: a case on iranian efl students at elementary level

1.0 overview it seems that grammar plays a crucial role in the area of second and foreign language learning and widely has been acknowledged in grammar research. in other words, teaching grammar is an issue which has attracted much attention to itself, and a lot of teachers argue about the existence of grammar in language teaching and learning. this issue will remind us a famous sentence f...

ذخیره در منابع من


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

ژورنال

عنوان ژورنال: Poultry Science

سال: 1977

ISSN: 0032-5791

DOI: 10.3382/ps.0560361