The evolution of broadly attached thoracic lobes could have increased the body temperature excess of ancient wingless insects by 55 percent over that of lobeless forms. The subsequent expansion of these thoracic lobes for behavioral thermoregulation could have provided the morphological stage required for the evolution of functional wings.
Approximately 500 fish were delivered to the Department of Fish Toxicology for routine experiments. Post‐mortem examination of 19 fish (10 males and 9 females) revealed the presence of greyish white cysts in the abdominal cavity, loosely attached to the viscera.
Apparently, 50 percent of the total 500 fish were affected, none of which showed clinical abnormality. Pathological results are described and discussed.
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