Premium
Insect development. IV. External morphology of grasshopper embryos of known age and with a known temperature history
Author(s) -
Slifer Eleanor H.
Publication year - 1932
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050530102
Subject(s) - grasshopper , biology , embryo , hibernation (computing) , zoology , insect , botany , anatomy , ecology , microbiology and biotechnology , state (computer science) , algorithm , computer science
Eggs of Melanoplus differentialis, a grasshopper, secured immediately after they had been laid, were placed in a water bath kept at 25°C, and allowed to develop for definite periods. After fixation, the embryos were dissected out of the eggs and drawn. Large numbers of eggs were examined in order to determine the degree of variation under specific conditions. For the stages following revolution, eggs were used in which ‘hibernation’ had been prevented by exposure to low temperatures.