Non-linear growth models for bullfrog tadpoles
نویسندگان
چکیده
منابع مشابه
Bystander effects in bullfrog tadpoles
Adaptive responses were observed using the micronucleus frequency in bullfrog tadpoles. In tanks in which control tadpoles were placed in contact with tadpoles that were previously housed in tritiated water (3.0× 104 Bq/L), the cells from all animals responded as though they were “adapted”. This suggests that direct exposure to 3.0× 104 Bq/L tritium contributes to an increased resistance to a h...
متن کاملEvaluation of Non- linear Growth Curves Models for Native Slow-growing Khazak Chickens
Native poultry is a valuable genetic source with high resistance against diseases providing an important subject for breeding programs. The non-linear mathematical modeling of the growth pattern may partly explain the relationship between requirements and body weight to precise feeding that plays a vital role in the animal enterprises. A study was conducted to compare five non-linear models inc...
متن کاملEffects of malathion on survival, growth, development, and equilibrium posture of bullfrog tadpoles (Rana catesbeiana).
Bullfrog (Rana catesbeiana) tadpoles were exposed to malathion in water in a 28-d static renewal test. The effects of malathion on survival, growth, development, and loss of equilibrium posture were determined. Survival was significantly decreased at malathion concentrations of 2,500 micrograms/L and higher. Development of tadpoles was delayed significantly by malathion exposure as indicated by...
متن کاملThe Effects of Aeration on Amphibian Larval Growth: An Experiment with Bullfrog Tadpoles
I conducted an experiment to assess the effects of aeration on the growth of bullfrog tadpoles (Rana catesbeiana). Tadpoles in the non-aerated treatment grew slower than tadpoles in the aerated treatment. Tadpoles in the nonaerated treatment were observed at the water's surface more often and on food resources less often than tadpoles in the aerated treatment. Oxygen concentrations in natural a...
متن کاملevaluating non-linear regression models for use in growth analysis of wheat
growth analysis is a valuable method in the quantitative analysis of crop growth, development and crop production. there are many regression models to describe the sigmoid growth patterns. by considering that, the parameters of non-linear regression models have physiological meanings, they are preferable relation to linear regression models. the aim of this study was to collect and evaluate the...
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: Ciência e Agrotecnologia
سال: 2012
ISSN: 1413-7054
DOI: 10.1590/s1413-70542012000400010