Journal / Archives
УДК 597.587.9 – 116(265.53) DOI: 597.587.9 – 116(265.53) Download the full article
Distribution of flatfish (Pleuronectiformes) eggs and larvae in the northern part of Pacific Ocean
Literature and archive data on distribution of flatfish eggs and larvae in the northern part of Pacific Ocean were generalized. Available data about more than 30 flatfish species inhabiting North America Pacific Ocean waters, the Bering Sea, the Pacific Ocean waters of Kamchatka and Northern Kuril Islands, the Seaof Okhotsk and the Sea of Japan, were used. Data about density of the distribution of the eggs and the larvae depending on depth and water temperature in the sites of sampling in different months are demonstrated.
УДК 595.384.2 DOI: 10.15853/2072-8212.2019.52.79-88Download the full article
The overview of the fishery of Pleuronectidae family species in the pacific waters off Kamchatka
Flounder catche statistics for the gulfs and waters adjacent South-East Kamchatka was analyzed based on the data obtained in the course of the trawl and Danish seine fishing of flounders on the shelf of South-East Kamchatka for the period 2003–2017. Trend to growth of the catches of flounders has been revealed in recent years. More than a half of the total commercial fishing days spent in Avachinsky and Kronotsky gulfs indicates of a high intensity of flouder fishing. Longterm average annual dynamics of the catches was also analyzed by seasons of the year. The analysis revealed having two commercial peaks: from January to May and from October to December. The catches of the flounder species of Far East, including contribution by rock sole into the total catch, were analyzed in the research. Results indicated, that rock sole is the main commecial species of flounders.
Analysis of fishing intensity and catch statistics was carried out for different fishing gears within the Petropavlovsk-Commander commercial fishery subzone, and it has revealed the dominance of the Danish seine fishing of flounders.
УДК 639.2.053.7 DOI: 10.15853/2072-8212.2019.52.89-107Download the full article
The structure of the Danish seine catches within the PetropavlovskCommander commercial fishery subzone in 2003–2017
Analysis of annual and seasonal dynamics of major indices and species composition of Danish seine catches within the Petropavlovsk-Commander commercial fishery subzone (Eastern Kamchatka) for the period from 2003 to 2017 was made. The fishing fleet for the period analyzed consisted of 40 mediate, 90 small ships and 125 small boats. The fleet spent respectively 10 606, 34 545 and 24 537 days for fishing and the total catch was 227 000, 466 258 and 200 760 t. Species structure of the catches was similar for all types of vessels. The contribution by species was: walleye pollock — 68.0–70.0%, flounders — 10.7–13.8%, Pacific cod — 8.5–11.2%, greenlings — 2.2–3.8%, sculpins — 4.2–5.3% and the other objects — less than 0.7%. Analysis of the interannual dynamics of the fishery indicated visible reduce of efforts for the small boats only. Substantial increase of the catch per an effort was observed for all types of vessels. In 2003–2005 a huge contribution of flounders, often higher that contribution of walleye pollock, into the catches of all types of vessels was observed. From 2006 walleye pollock became Danish seine fishery dominant species. The mediate and small ships spent minimal efforts in June–September, while small boats demonstrated peak effort volume in these months. In March and December, meantime, when mediate and small ships were maximum active, the commercial fishing activity of the small boats was low. In April ships of mediate size typically demonstrated the contribution of walleye pollock into the catches decreased , what is a likely effect of banning walleye pollock target fishing by Danish seine within the subzone in mentioned period. In the other months the walleye pollock’s contribution for mentioned type of ships varied from 64.3% to 83.7%. For small ships the walleye pollock’s contribution was the lowest in February–April (57.0–58.8%), for small boats — in February (34.7%). Analysis of the interannual and seasonal dynamics of species structure in the catches by Danish or Far Eastern seines does not provide grounds to reckon Danish seine as more selective in case of walleye pollock, comparing Far Eastern seine version.