V. M. Serkova, M. S. Kornienko, and V. A. Kolobov
Institute of Marine Biology, Far Eastern Division, Russian Academy of Sciences (IBM DVO RAN),
ul. Palchevskogo 17, Vladivostok, 690041 Russia
a e-mail: serkov_vm@mail.ru
Received December 15, 2006
Abstract—Study of the dilate sea-water tolerance of the pipefish Syngnathus acusimilis indicated that it suc-
cessfully acclimatized to an abrupt change in water salinity from 5 to 32‰. Larvae in the brood pouch also suc-
cessfully acclimatized to salinity change, and, after several days, juveniles left the brood pouch and continued
to live. In freshwater, adult and fry perished during several minutes. In the gill epithelium of S. acusimilis, chlo-
ride cells of only a marine type were found. A comparison of the ultrastructure of chloride cells of gill epithe-
lium and mitochondrion-rich cells of the brood pouch of S. acusimilis demonstrated their high similarity. The
ultrastructure of cells of the brood pouch indisputably attests to their involvement in maintaining an osmotic
and ionic homeostasis in the cavity of the brood pouch.
DOI: 10.1134/S0032945207090081
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