Nom du corpus

Corpus Systématique Animale

Titre du document

On the distribution of ‘gonionemus vertens’ a. Agassiz (Hydrozoa, Limnomedusae), a new species in the eelgrass beds of Lake Grevelingen (S.W. Netherlands)

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Arthropodes_v2b_01390, Eponges_v2b_0248
Auteur(s)
  • C. Bakker
Affiliation(s)
  • Delta Institute for Hydrobiological Research, Yerseke, The Netherlands
Résumé

Data about morphology, life history and habits ofGonionemus vertens A. Agassiz (Hydrozoa, Limnomedusae) are given. The distribution of the species is treated in more detail, especially its mechanism in relation to large-scale (global) and small-scale (local) range extensions. The species is endemic in the coastal North Pacific Ocean, possessing a strictly littoral medusa stage (bound to eelgrass beds and algal belts) and a very small sessile solitary polyp phase (attached to stones and shells). The hypotheses trying to explain the spread to Western Europe and the Atlantic coast of North America strongly suggest human influences,i.e. distribution of the polyp via oyster transports (EDWARDS, 1976) and transport of the polyp as a member of the fouling community on ships hulls (TAMBS-LYCHE, 1964). Arguments pro and contra these hypotheses are evaluated. The occurrence ofGonionemus polyps in offshore waters, as mentioned by EDWARDS (1976) but not further discussed by this author, deserves more attention. It is the assumed occurrence of the polyps in shallow as well as in deeper waters with strong tidal movements that explains satisfactorily the previous and recent findings of the medusa in the S.W.-Netherlands. The medusa has been found in theZostera marina beds of the saline Lake Grevelingen. From 1976 onwards the abundance of the medusa increased synchronously with the extension of the eelgrass beds. Medusae were collected during the summer of 1980, fed with isopod crustaceans or mussel meat and kept alive for several months in seawater aquaria in the lab. Polyps have not yet been observed.

Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - invertebres
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - General Agricultural and Biological Sciences
Identifiant ISTEX
E13B273943DC36DB535B6EC4F1B380B3F253B0DC
Revue

Hydrobiological Bulletin

Année de publication
1980
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
10
Sous-corpus
  • Arthropodes
  • Eponges
Type de publication
Journal
ark:/67375/1BB-5048SDN6-9
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