Diapause Characteristics of the Emma Field Cricket, Teleogryllus emma
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The diapause of Telegryllus emma, the Emma field cricket, was investigated to study the ecological characteristics of the species. Changes in the volume, oxygen consumption, and water content of T. emma eggs were followed from oviposition. An increase in volume, oxygen consumption and water uptake occurred from 7 to 8 days following oviposition. The oxygen consumption of the eggs increased slowly for 7 days following oviposition,but then decreased until 15 days following oviposition. These results showed that a physiological change at diapause initiation affected the volume, water content, and oxygen consumption of the T. emma eggs. An experimental investigation of egg hatching showed that the eggs could be stocked at 10oC for 40 days with a 14 day pre-period after laying and yield, 62.1% hatchability under these conditions. Maintaining the temperature at approximately 10oC was favorable for hatching. Another experiment on egg hatching showed that the storage of eggs at 10oC from 40 to 180 days would ensure satisfactory, hatching capacity.
Abstract
The diapause of Telegryllus emma, the Emma field cricket, was investigated to study the ecological characteristics of the species. Changes in the volume, oxygen consumption, and water content of T. emma eggs were followed from oviposition. An increase in volume, oxygen consumption and water uptake occurred from 7 to 8 days following oviposition. The oxygen consumption of the eggs increased slowly for 7 days following oviposition,but then decreased until 15 days following oviposition. These results showed that a physiological change at diapause initiation affected the volume, water content, and oxygen consumption of the T. emma eggs. An experimental investigation of egg hatching showed that the eggs could be stocked at 10oC for 40 days with a 14 day pre-period after laying and yield, 62.1% hatchability under these conditions. Maintaining the temperature at approximately 10oC was favorable for hatching. Another experiment on egg hatching showed that the storage of eggs at 10oC from 40 to 180 days would ensure satisfactory, hatching capacity.
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