Walleye pollock stock assessment in the Sea of Okhotsk in the spring of 2013

Walleye pollock stock assessment in the Sea of Okhotsk in the spring of 2013 The data on the stock assessment and structure of the walleye pollock population in the northern Sea of Okhotsk are based on trawl and ichthyoplankton surveys in April and May of 2013. As compared to the assessment of 2012, the total abundance of walleye pollock decreased by 1.8 times and its biomass decreased by 1.4 times. The low number of young-of-the-year, 1.6 × 109 ind., indicates that the 2012 year-class is weak. Three modal size and age groups of walleye pollock in the Sea of Okhotsk are clearly distinguished: 17–23 cm (2-year-olds), 30–36 cm (5-year-olds), and 37–53 cm (mature fish). In general for the sea, the exploitable walleye pollock stock is estimated at the average level, viz., 6.649 million tons. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Marine Biology Springer Journals

Walleye pollock stock assessment in the Sea of Okhotsk in the spring of 2013

Loading next page...
 
/lp/springer_journal/walleye-pollock-stock-assessment-in-the-sea-of-okhotsk-in-the-spring-qJQwkKoM0K
Publisher
Springer Journals
Copyright
Copyright © 2014 by Pleiades Publishing, Ltd.
Subject
Life Sciences; Freshwater & Marine Ecology
ISSN
1063-0740
eISSN
1608-3377
D.O.I.
10.1134/S1063074014070062
Publisher site
See Article on Publisher Site

Abstract

The data on the stock assessment and structure of the walleye pollock population in the northern Sea of Okhotsk are based on trawl and ichthyoplankton surveys in April and May of 2013. As compared to the assessment of 2012, the total abundance of walleye pollock decreased by 1.8 times and its biomass decreased by 1.4 times. The low number of young-of-the-year, 1.6 × 109 ind., indicates that the 2012 year-class is weak. Three modal size and age groups of walleye pollock in the Sea of Okhotsk are clearly distinguished: 17–23 cm (2-year-olds), 30–36 cm (5-year-olds), and 37–53 cm (mature fish). In general for the sea, the exploitable walleye pollock stock is estimated at the average level, viz., 6.649 million tons.

Journal

Russian Journal of Marine BiologySpringer Journals

Published: Jan 7, 2015

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off