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image of Crustaceana

Ovigerous females of Palaemonetes argentinus maintained in small tanks for 8 to 12 days, were studied to make a daily follow up of their eggs’ embryonic development. This study allowed morphological characterization of the embryonic structures from the time the eggs were laid until the time they hatched. The average embryogenesis time was 10 days. The daily changes noticed did not occur with the same intensity in every instance, giving evidence to different rhythms of development during the eggs’ incubation.

Des femelles ovigères de Palaemonetes argentinus, maintenues dans des petits récipients pendant 8 à 12 jours, ont été étudiées pour suivre journellement le développement embryonnaire de leurs oeufs. Cette étude a permis la caractérisation morphologique des structures embryonnaires depuis la ponte jusqu’à l’éclosion. La durée moyenne de l’embryogenèse a été de 10 jours. Les changements journaliers notés ne se sont pas produits avec la même intensité dans tous les cas, ceci prouvant qu’il y a des rythmes différents de développement pendant l’incubation des oeufs.


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