Length-weight, length-length relationships, and condition factors of black rockfish Sebastes schlegelii Hilgendorf, 1880 in Lidao Bay, China

  • Lijuan Wang
  • Zhihao Wu
  • Mengxia Liu
  • Wei Liu
  • Wenxi Zhao
  • Hongjun Liu
  • Peijun Zhang
  • Feng You
Article

DOI: 10.1007/s41208-017-0021-6

Cite this article as:
Wang, L., Wu, Z., Liu, M. et al. Thalassas (2017) 33: 57. doi:10.1007/s41208-017-0021-6
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Abstract

In this study, we analyzed the length-weight relationships (LWRs), total length (TL)—standard length (SL) relationships (LLRs), and Fulton’s condition factor (K) of male and female black rockfish Sebastes schlegelii Hilgendorf, 1880 in Lidao Bay, Yellow Sea, China. Among the 729 S. schlegelii specimens sampled seasonally in February, May, August and November between 2011 and 2015, most were males (sex ratio = 1 male:0.79 female). The LWRs of each season were significant (P < 0.05), and all coefficients of determination (r2) were higher than 0.95. The values of the slope (b) estimated for each LWR regression varied from 2.947 to 3.277 and were lower in spring than those in other seasons, especially in females. The LLRs calculated as the regression of TL on SL and vice versa were linear. The values of K ranged from 0.791 to 2.981 in males (n = 407) and from 0.752 to 2.681 in females (n = 322), and the highest value was found in spring. The present results provide baseline information on biological data of LWRs, LLRs, and K for S. schlegelii in this area, and will be useful in further studies on stock management of S. schlegelii.

Keywords

Sebastes schlegelii Hilgendorf, 1880 Lidao Bay Length-weight relationships Length-length relationships Condition factor Sex ratio 

Funding information

Funder NameGrant NumberFunding Note
National Special Research Fund for Non-Profit Marine Sector
  • No. 201305043
Special Program for Basic Research of the Ministry of Science and Technology of China
  • No. 2014FY110500
National Infrastructure of Fishery Germplasm Resource
    IOCAS funding
    • No. 2012IO060102

    Copyright information

    © Springer International Publishing Switzerland 2017

    Authors and Affiliations

    • Lijuan Wang
      • 1
      • 2
      • 3
    • Zhihao Wu
      • 1
      • 2
    • Mengxia Liu
      • 4
    • Wei Liu
      • 4
    • Wenxi Zhao
      • 4
    • Hongjun Liu
      • 4
    • Peijun Zhang
      • 1
      • 2
    • Feng You
      • 1
      • 2
    1. 1.Key Laboratory of Experimental Marine Biology, National & Local Joint Engineering Laboratory of Ecological Mariculture, Institute of OceanologyChinese Academy of SciencesQingdaoChina
    2. 2.Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and TechnologyQingdaoChina
    3. 3.University of Chinese Academy of SciencesBeijingChina
    4. 4.Marine Biology Institute of Shandong ProvinceQingdaoChina

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