Nom du corpus

Corpus Systématique Animale

Titre du document

Diapause, a potent force in the evolution of freshwater crustaceans

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • diapause
  • freshwater Crustacea
  • antiquity
  • diversity
  • evolution
Nom du fichier dans la ressource
Arthropodes_v2b_01035
Auteur(s)
  • Geoffrey Fryer
Affiliation(s)
  • Institute of Environmental and Biological Sciences, Lancaster University, LA1 4YQ, Bailrigg, UK
Résumé

After a brief historical review of the discovery of diapause in freshwater crustaceans, its dramatic nature in certain cyclopoid copepods, in which diapausing individuals may occur at densities of > 106 per m2, is used to illustrate the enormous ecological significance of the phenomenon. Some of the problems presented by dispause in cyclopoid copepods are noted, including the different behaviour in different lakes of what appears to be a single species. Different physiological cues or different genetic endowments are clearly involved. The wider incidence of diapause in freshwater copepods and ostracods is noted. Among freshwater crustaceans it it the Branchiopoda that have universally adopted diapause, always at the egg stage. Even such an ancient order as the Anostraca, perhaps the most primitive of all crustaceans, produces elaborately constructed resting eggs that are capable of cryptobiosis, can remain viable in a dry state for long periods, and can tolerate extreme conditions. The nature of branchiopod resting eggs is briefly reviewed. Of these, only those of the Anomopoda are protected by containers derived from the parental carapace. These are mechanically complex in the most advanced species but, as shown by fossils, are extremely ancient structures. Factors initiating the onset and termination of diapause in branchiopods are briefly noted, and the process of hatching of resting eggs is outlined.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
Identifiant ISTEX
38F42E99DB2D959CEE4CBB2F368E0F10127B2383
Revue

Hydrobiologia

Année de publication
1996
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.604
Sous-corpus
  • Arthropodes
Type de publication
Journal
ark:/67375/1BB-JDGHLGX2-8
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