Genetic studies on species composition and population structure of sand eels (Genera: Ammodytes, Hyperoplus and Gymnammodytes) in Norwegian waters

Autor:	S. Thorkildsen, Gunnar Nævdal
Rok vydání:	2002
Předmět:	biology Ecology Ammodytes Norwegian Aquatic Science biology.organism_classification Hyperoplus lanceolatus Intraspecific competition language.human_language Common species Hyperoplus Gymnammodytes language Composition (visual arts)
Zdroj:	Journal of Applied Ichthyology. 18:124-126
ISSN:	1439-0426 0175-8659
DOI:	10.1046/j.1439-0426.2002.00310.x
Popis:	Five species of sand eels (Ammodytidae) are regularly found in the north-east Atlantic. Some of these species (i.e. Ammodytes tobianus L. and A. marinus Raitt) are difficult to identify by morphological criteria. The aims of the study reported were (a) to reveal unambiguous genetic traits for species classification and (b) to study possible population structure of the more common species in Norwegian waters. In total more than 900 specimens were analysed for inter- and intraspecific allozyme variation. Reference samples were obtained from Scotland and Denmark. By combining the patterns at different loci, all five species could be unambiguously defined. In Norwegian waters A. marinus was found together with minor numbers of Hyperoplus lanceolatus (Le Sauvage). As expected, Gymnammodytes semisquamatus (Jourdain) and H. immaculatus (Corbin) were not found, but not finding A. tobianus in these waters was unexpected. Distribution of alleles at three polymorphic loci did not indicate any structure of A. marinus in Norwegian waters.
Databáze:	OpenAIRE
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