Accession Number : AD0689677

Title :   THE REACTION OF THE BLACK SEA POLYCHAETE WORM MERCIERELLA ENIGMATICA FAUVEL TO VARIOUS SALINITIES (Otnoshenie Chernomorskogo Mnogoshchetinkovogo Chervya Mercierella Enigmatica Fauvel k Usloviyam Razlichnoi Solenosti),

Corporate Author : NAVAL OCEANOGRAPHIC OFFICE WASHINGTON D C

Personal Author(s) : Turpaeva,E. P.

Report Date : 1963

Pagination or Media Count : 19

Abstract : Various stages in the development of Mercierella enigmatica taken from the Black Sea have been subjected to experiments in aquariums where the salinity of water ranged from 3 to 34 o/oo. It was found that the animal is a euryhaline form capable of living in waters where the salinity ranges from 7 to 34 o/oo. It was further found that the critical stage, i.e. the stage that is most sensitive to sharp salinity variations, is the larval stage at the time the young worms settle on solid objects. When comparing the investigations carried out by foreign scientists with M. enigmatica obtained from the Mediterranean Sea, where the salinity is higher than in the Black Sea, it was established that the Mediterranean specimens can endure salinity variations from 7 to 55 o/oo, which attests to the fact that the Black Sea Mercierella enigmatica forms a special race that has reduced the latitude of its euryhaline aspect since penetrating into the Black Sea from the Mediterranean. Lastly, the investigations disclosed that the propagation of the species is limited to confined areas in ports, harbors, bays, estuaries, canals, etc. where the water, at least for limited intervals, is completely calm because the sensitive settling larvae need calm water to survive. (Author)

Descriptors :   (*ANNELIDA, SALINITY), (*FOULING, ANNELIDA), (*ECOLOGY, ANNELIDA), LARVAE, SENSITIVITY, TOLERANCES(PHYSIOLOGY), BLACK SEA, MEDITERRANEAN SEA, SURVIVAL(PERSONNEL), CHEMICAL PROPERTIES, GROWTH(PHYSIOLOGY), USSR

Subject Categories : Anatomy and Physiology
      Biological Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE