Developmental and moult cycle related biochemical changes in larvae of the spider crab, Maja brachydactyla (Brachyura: Majidae)
Visualitza/Obre
Data de publicació
2012-09-30ISSN
0214-8358
Resum
Ontogenetic changes in dry weight, elemental composition (CHN), and digestive enzyme activities (total
protease, amylase) were studied during the moulting cycle of all larval instars (zoea I-II, megalopa; ZI, ZII, M) of the spider
crab Maja brachydactyla Balss, 1922 reared in the laboratory. A gradual but significant increase in biomass was observed
throughout the zoeal instars, followed by steeper growth in the megalopa. Maximum values were reached in moult stage D2.
Digestive enzyme activities also increased significantly throughout larval development. The ZI showed a continuous increase
in total protease activity during its moult cycle, suggesting that newly hatched larvae have a gradually increasing need to
take up proteins to provide amino acids, which are prime materials for growth and development, and possibly to use them as
a metabolic energy source. The largest variations in digestive enzyme activites in relation to the moult cycle were observed
in the megalopa instar. After an initial increase in postmoult, enzyme activities decreased to low levels similar to those
measured in the zoeal instars at intermoult, followed by another increase to a maximum level in premoult. Metamorphosis
involves great physiological and behavioural changes, which could explain the large variations in the megalopa moult cycle.
We therefore suggest that the moult cycle stages should be taken into account when nutritional condition indices are used to
estimate the physiological performance of decapod crustacean larvae.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
English
Matèries (CDU)
637 - Productes dels animals domèstics, de la caça i de la pesca
Pàgines
6
Publicat per
Consejo Superior de Investigaciones Científicas
Publicat a
Scientia Marina
Citació
Rotllant, Guiomar, Guillermo Guerao, Marta Sastre, and Klaus Anger. 2012. “Developmental and Moult Cycle Related Biochemical Changes in Larvae of the Spider Crab, Maja Brachydactyla (Brachyura: Majidae).” Scientia Marina 76 (3): 483–488. doi:10.3989/scimar.03284.20a.
Número de l'acord de la subvenció
INIA/Programa Nacional de Proyectos de Investigación Fundamental/RTA2008-00003-00-00/ES/Determinación de indicadores nutricionales y su aplicación en el desarrollo de dietas inertes para larvas y juveniles de centollo, Maja brachydactyla/
Programa
Aqüicultura
Aquest element apareix en la col·lecció o col·leccions següent(s)
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