Issue |
Bull. Fr. Pêche Piscic.
Number 372-373, 2004
|
|
---|---|---|
Page(s) | 431 - 438 | |
DOI | https://doi.org/10.1051/kmae:2004016 | |
Published online | 01 April 2008 |
ON SELECTED MORPHOMECHANICAL CHARACTERISTICS OF SIGNAL CRAYFISH (PACIFASTACUS LENIUSCULUS DANA) EGGS DURING INCUBATION
SÉLECTION DES CARACTÉRISTIQUES MORPHOMÉCANIQUES DES OEUFS DE L’ÉCREVISSE SIGNAL (PACIFASTACUS LENIUSCULUS DANA) PENDANT L’INCUBATION.
1
Department of Fish Anatomy and Embryology, Agricultural University of Szczecin, Poland. E-Mail: embryo@fish.ar.szczecin.pl
2
Department of Ecology, University of Szczecin, Poland
Received:
6
January
2004
Accepted:
11
October
2004
Changes in resistance to mechanical pressure during embryogenesis were studied in the signal crayfish (Pacifastacus leniusculus Dana). A constant increase in egg size (volume and surface area) was observed to take place throughout the embryonic development, the increase occurring as most probably result of water absorption. The increase in the egg volume was found to be accompanied by a constant reduction in the egg membrane resistance.
Morphomechanical aspects of crayfish hatching as well as a possibility of taking advantage of them to enhance astacid reproduction are discussed.
Résumé
Les changements de résistances sous l’effet d’une pression externe pendant l’embryogenèse chez l’écrevisse signal (Pacifastacus leniusculus Dana) ont été étudiés. Une augmentation constante de la taille de l’œuf (volume et surface), due à l’absorption d’eau, a été observée pendant tout le développement embryonnaire. Il a été montré que l’accroissement du volume de l’œuf était accompagné d’une réduction constante de la résistance de la membrane de cet œuf.
Les aspects morphomécaniques du système d’éclosion des écrevisses ainsi que la possibilité d’en tirer profit pour améliorer la reproduction des astacidés sont discutés.
Key words: signal crayfish / embryogenesis / egg membrane resistance
Mots clés : écrevisse signal / embryogenèse / résistance des œufs
© ONEMA, 2004
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.