Abnormally Small Egg Size Observations
نویسندگان
چکیده
منابع مشابه
Egg components, egg size, and hatchling size in leatherback turtles.
Relationships between egg size, egg components, and neonate size have been investigated across a wide range of oviparous taxa. Differences in egg traits among taxa reflect not only phylogenetic differences, but also interactions between biotic (i.e., maternal resource allocation) and abiotic (i.e. nest environment conditions) factors. We examined relationships between egg mass, egg composition,...
متن کاملEstimating Repeatability of Egg Size
—Measures of repeatability have long been used to assess patterns of variation in egg size within and among females. We compared different analytical approaches for estimating repeatability of egg size of Black Brant. Separate estimates of repeatability for eggs of each clutch size and laying sequence number varied from 0.49 to 0.64. We suggest that using the averaging egg size within clutches ...
متن کاملTemperature during egg formation and the effect of climate warming on egg size in a small songbird
The predicted effects of recent climate warming on egg size in birds are controversial, as only two long-term studies have been reported, with contrasting results. Long-term data on egg size variation are analyzed in relation to ambient temperatures in a southern European population of pied flycatchers where breeding phenology has not matched the spring advancement in the last decades. Cross-se...
متن کاملThe manipulation of egg size and egg quality
T.R. Morris Department of Agriculture and Horticulture, University of Reading, England Striking improvements in the efficiency of egg production have been achieved in many countries, with the result that eggs are cheap and the market is saturated. In these circumstances, the emphasis shifts from quantity to quality, though what is meant by quality differs considerably from place to place. Some ...
متن کاملRevisiting the positive correlation between female size and egg size
Positive correlations between maternal size and propagule (egg, seed, embryo) size could arise for several reasons. One of these is that larger mothers may improve the survival of their offspring during a stage when large propagules typically have lower survival than small propagules. We previously developed an optimality model that incorporated this effect and used it to explain the positive c...
متن کاملذخیره 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: 1962
ISSN: 0032-5791
DOI: 10.3382/ps.0411011