Interestingly, specimens from crystalline sites show a higher mortality rate after
exuviation than those living on limestone (data not shown).
gregaria agees de 5 jours, a retarde le moment de la premiere oviposition, a reduit de trois fois la fecondite des femelles et a cause une activite ovicide de 74 % sur les oeufs pondus par les femelles traitees des leur
exuviation comparativement aux temoins (Tail et al.
Under starvation conditions, a first event commonly observed is a weight loss in relation to energy expenditure for basal metabolism; after a few days, shrimp in premolt stages will not evolve further and refrain from
exuviation, saving around 1.4 kJ (Read & Caulton 1980), which is the energy expenditure at molt.
Immunocytochemical studies on the isopod Oniscus asellus (Nussbaum et al., 1995) suggest that CCAP might be involved in the biphasic
exuviation pattern seen in isopods.
The low hormone levels affect the chitin synthesis and thus disturb the normal secretion and cuticular
exuviation in treated specimens.
It is important to notice that although we didn't determine the intermolt stage of the shrimps at dissection, the cytological differences that occur at different stages in the molt cycle are due to the mobilization of reserves during the phases in which the animal does not eat (12 h before and 4 h after
exuviation in this species) (Petriella, 1984).
Growth and
exuviation of Norway lobster (Nephrops norvegicus) larvae reared in the laboratory.