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Variations in the presence of chloride cells in the gills of lampreys (Petromyzontiformes) and their evolutionary implications
Author(s) -
Bartels H.,
Docker M. F.,
Krappe M.,
White M. M.,
Wrede C.,
Potter I. C.
Publication year - 2015
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/jfb.12633
Subject(s) - lamprey , lampetra , biology , gill , zoology , fresh water , ecology , aquatic animal , fishery , fish <actinopterygii>
Although confined to fresh water, non‐parasitic species of lampreys and the landlocked parasitic sea lamprey, all of which were derived relatively recently from anadromous ancestors, still develop chloride cells, whose function in their ancestors was for osmoregulation in marine waters during the adult parasitic phase. In contrast, such cells are not developed by the non‐parasitic least brook lamprey Lampetra aepyptera , which has been separated from its ancestor for >2 million years, nor by the freshwater parasitic species of the genus Ichthyomyzon . The length of time that a non‐parasitic species or landlocked parasitic form or species has spent in fresh water is thus considered the overriding factor determining whether chloride cells are developed by those lampreys.