• English
    • français
    • español
    • русский
  • English 
    • English
    • français
    • español
    • русский
  • Login
View Item 
  •   Home
  • ASIA
  • Iran (Islamic Republic of)
  • Iranian Fisheries Science Research Institute
  • Scientific Records, Posters, Reports
  • View Item
  •   Home
  • ASIA
  • Iran (Islamic Republic of)
  • Iranian Fisheries Science Research Institute
  • Scientific Records, Posters, Reports
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Browse

All of AquaDocsCommunitiesPublication DateAuthorsTitlesSubjectsThis CollectionPublication DateAuthorsTitlesSubjects

My Account

LoginRegister

User Information

About AquaDocsPoliciesUser GuidesOther Aquatic Repositories

Statistics

Display statistics

Stock assessment of kutum in the Iranian waters of the Caspian Sea

  • CSV
  • RefMan
  • EndNote
  • BibTex
  • RefWorks
Thumbnail
Name:
53972.pdf
Size:
2.805Mb
Format:
PDF
Download
Average rating
 
   votes
Cast your vote
You can rate an item by clicking the amount of stars they wish to award to this item. When enough users have cast their vote on this item, the average rating will also be shown.
Star rating
 
Your vote was cast
Thank you for your feedback
Author
Daryanabard, Gholam Reza
Fazli, H.
Janbaz, A.A.
Bagherzadeh Afroozi, F.
Taleshian, H.
Vahabnejad, A.
Sheikhtabar, A.A.
Akhoundi, M.
Date
2018

Metadata
Show full item record
Abstract
This study was conducted to determine catch and fishing effort trends, length and age composition, growth and mortality parameters and estimate biomass and acceptable biological catch of Kutum in the Iranian coastal waters of the Caspian Sea from 2015 to 2017. The catch of Kutum was 4282.9 and 3395.5 tons and CPUE were 98.3 and 80.4 kg/haul in 2015-2016 and 2016-2017, respectively. The mean (± SD) of fork length were observed 38.8±6.6 and 37.1±5.6 cm and for total weight were 790.8±435.2 and 637.2±392.2 gram in 2015-2016 and 2016- 2017, respectively. The most predominated of length class was obtained 34-36 cm in 2015-2016 and from 36-38 to 38-40 cm in 2016-2017 respectively and frequency of immature individuals were observed 48.1 and 55.5 percent during two sampling period, respectively. The range of age was from 2 to 11 year and fish with 3 to 5 years comprised up to 76.6 percent. In length – weight relationship a, b and r2 were calculated 0.01, 3.04 and 0.96 in 2015-2016 and 0.005, 3.19 and 0.92 in 2016-2017 respectively. K value, L∞ and t0 were calculated 0.2 (/year), 62.3 cm and -0.65 respectively. Mortality parameters such as Z, M and F were calculated 0.72, 0.37 and 0.35 respectively and Exploitation rate were calculated 0.49. The biomass of kutum estimated 25270 tons and the biomass of Kutum decreased in recently years in spite of produce and release of huge fingerlings. This recruitment (produce and release fingerlings) must be continued for stability of stocks and fishing stress must be decrease by anyway.
Pages
67pp.
Publisher or University
Iranian Fisheries Science Research Institute
Series : Nr
53972;
URI
http://hdl.handle.net/1834/14115
Collections
Scientific Records, Posters, Reports

entitlement

 

DSpace software (copyright © 2002 - 2023)  DuraSpace
Quick Guide | Contact Us | Disclaimer
Open Repository is a service operated by 
Atmire NV
 

Export search results

The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.