Title: Influence of ecdysterone on molting in Palaemonetes
Abstract: Since many female decapod crustaceans are known to delay molting until after release of their larvae or young, such ovigerous female shrimp may have a high titer of molt-inhibiting substance. At that time, comparison can be made between ovigerous females and mature males in terms of their response to injections of a molting hormone. Injection of ecdysterone (β-ecdysone, 20-hydroxyecdysone) in doses between 5 and 0.25 μg, proved to be toxic to adult shrimp. However, when treated with 0.1 μg of ecdysterone, ovigerous female shrimp survived the incubation period of their larvae without molting. Similar treatment of males during stage C of their molt cycle resulted in an increase in the rate of molting among this group. Injection of ecdysterone during stage D of the molt cycle induced no change in molting frequency. We suggest that the action of ecdysterone is influenced by the titer of a molt-inhibiting factor in the recipient animal.
Publication Year: 1972
Publication Date: 1972-06-01
Language: en
Type: article
Indexed In: ['crossref', 'pubmed']
Access and Citation
Cited By Count: 17
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