КамчатНИРО
91
yearsKamchatka Research Institute of Fisheries and Oceanography
years
Journal / Archives
УДК 597.574.52DOI: Download the full article
Present-day state and long-term changes in the ichthyofauna composition of the Kamchatka river estuary
This paper characterizes the present-day state of ichthyofauna in estuarine water bodies of the Kamchatka River (the Nerpich’e, Kultuchnoe and Таkhirskie Lakes) basing on 2009–2011 field studies. Actual estuarine water bodies are brackish water areas with the ichthyofauna composed by 17 fish species. In life history traits all the species of the study water bodies are divided into 3 ecological forms: permanent, semi-anadromous and transit. Permanent species of the first group are constantly present in the estuarine water bodies, semi-anadromous fish appear there only to spawn in winter and spring transit species just migrate through the estuary seaward and to the rivers. This study demonstrates that today fish fauna composition differs from that of the beginning of the XX-th century when the estuarine water bodies were freshwater. According to the determined interconnections between the salinity of estuarine water bodies and their ichthyofauna a prognosis of changing of the latter is given for the case of possible estuary’s freshening.
УДК 597.553 2DOI: Download the full article
Biological characteristics of some pacific salmons in the lower reaches of the Kamchatka river at the beginning of the XX-th century (according to the results of the analyzed unpublished archiv al data of P.Yu. Schmidt)
1908–1909 never before published data on biological characteristics of Pacific salmons and catch dynamics in the lower reaches of the Kamchatka River collected by Kamchatkan Expedition of the Russian Geographical Society (Ryabushinskiy’s expedition) are reported in this article. The data presented in original materials (diaries, letters and separate notes) which were written by the head of zoological group of P.Yu. Schmidt’s expedition now are stored in the archives of the Russian Academy of Sciences and the Russian Geographical Society. The authors of the article discovered, processed and analyzed them.