TOMSK, Feb 13 – RIA Tomsk. Graduate student of Biological
institute of Tomsk State University (TSU) Yury Dyldin together with the colleague
from the Russian Research Institute of Fisheries and Oceanography carried out audit
of cartilaginous fishes who are found in the water area of Sakhalin, and created
their first annotated list, it is reported on Tuesday on TSU website.
With reference to the scientists
it is noted that the fish fauna of Sakhalin is studied for about 200 years, however
the annotated list of cartilaginous fishes which are found in its water area, wasn't
created until recently. Scientists investigated the richest collections of fish
fauna in the scientific museums of Russia, Japan and the USA, analyzed books, theses,
scientific articles, contemporary records published on this subject to carry out
full audit of these fishes.
"We found out that about 30
more representatives of cartilaginous fishes constantly or temporarily live in these
waters besides more than ten species of this class which presence was fixed at different
times near Sakhalin. For example, five species of slopes, new to fish fauna of Russia,
which aren't recorded in references are revealed", – Dyldin is quoted in the
message.
It is added that the list which
contains information on 14 species of sharks, 27 species of slopes and two types
of chimeras became result of specific inventory. Latin and English names, data on
collection copies confirming their presence in the studied region, area and depth
of dwelling of each look, place of catch, nature protection status, degree of danger
to human and other data are specified in it.
It is noted that the authors of
the list noted the interesting tendency caused by warming of climate: "thermophilic
migrants" – types which usually live absolutely in other conditions appear
in the water area of Sakhalin even more often. So, the white shark cannibal began
to fall into the nets of fishermen.
"The complete annotated list
of cartilaginous fishes of the Sakhalin island in which drawing the Russian scientist
was assisted by foreign colleagues Hajime Ishihara (Japan) and James Orr (the USA,
Alaska), will be presented in the scientific article which will appear in March,
2018 in the Journal of Ichthyology magazine of Springer publishing house,"
– it is said in the statement.
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Scientist of the Russian Research Institute of Fisheries and Oceanography Alexey Orlov