منابع مشابه
Sexing Day-Old Chicks on Small and Backyard Flocks
Vent sexing was developed in Japan and brought to North American poultry producers in the 1930s. Vent sexing is a skill that takes a long time to develop. It involves holding the chick upside down in one hand, expelling the fecal material, and everting (turning outward) the vent area. The producer can then look for the presence or absence of a rudimentary male sex organ. This process sounds muc...
متن کاملThe Nutritional Requirements of Baby Chicks
When Sugiura and Benedict (1) concluded from their work with pigeons and squabs that vitamin A was not required for avian nutrition, a fundamental distinction, if true, in the nutritional requirement of birds and mammals was made. It would seem, of course, that such an observation could not go unchallenged for any length of time, especially when the entire gamut of avian life was included. Cons...
متن کاملSexing Day-Old Chicks: A Case Study and Expert Systems Analysis of a Difficult Perceptual-Learning Task
The sexing of day-old chicks has been regarded as an extraordinarily difficult perceptual task requiring years of extensive practice for its mastery. Experts can sex chicks at over 98% accuracy at a rate of 1,000 chicks per hour spending less than a half second viewing the cloacal region. Naive subjects were shown 18 pictures of cloacal regions of male and female chicks (in random appearing arr...
متن کاملThe Influence of Environmental Temperature on the Utilization of Food Energy in Baby Chicks
1. An optimum of environmental temperature is to be expected for the utilization of food energy in warm blooded animals if their food intake is determined by their appetite. 2. Baby chicks were kept in groups of five chicks in a climatic cabinet at environmental temperatures of 21 degrees , 27 degrees , 32 degrees , 38 degrees , and 40 degrees C. during the period of 6 to 15 days of age. The in...
متن کاملSexing Citizenship, Privatizing Sex
This paper explores different stories of sexual citizenship found in gay and lesbian rights struggles. It uses two recent cultural productions , Kissing Jessica Stein and Queer as Folk, to analyze the stories of sexual citizenship found in two Supreme Court decisions, M. v. H., and Little Sisters. The paper deploys these contrasting stories of sexual citizenship, of sameness and difference, ass...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1934
ISSN: 0032-5791
DOI: 10.3382/ps.0130208