Indian Journal of Geo-Marine Sciences

Open Access Open Access  Restricted Access Subscription Access

Estimation of Morphometric Relationships for Flathead Sillago, Sillaginopsis panijus (Hamilton, 1822) in the Bay of Bengal (Bangladesh) using Multi-Linear Dimensions


Affiliations
1 Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna – 9208, Bangladesh
2 Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh

This study on flathead sillago, Sillaginopsis panijus (Hamilton 1822) estimates the first morphometric relationships from the marine ecosystem, Bay of Bengal, Bangladesh using multi-linear dimensions. Additionally, meristic counts for different fin-rays were done. Alltogether, 204 specimens were captured during July 2018 to June 2019 by several gears including seine net and long lines. Morphometric measurements as well as body weight (BW) were recorded for each individual. The LWRs (length-weight relationships) were assessed as: W = a × Lb. Lateral line scales and fin rays were observed by magnifying glass. The LWRs and LLRs (length-length relationships) were found significant (p < 0.0001), with the r2 values being ≥ 0.913 and ≥ 0.952, respectively. Based on r2 values, LWRs by BW vs. SL and for LLRs, TL vs. FL were found as the best model. Fin formula observed for S. panijus is D1 IX; D2 I/24-28; P.17-20; Pv.1/5; A I-II/24-27; C 2/16-18. Scales on lateral line were ∼82-86. This investigation should be helpful for resource management in the marine ecosystems of Bangladesh and other subtropical countries.
User
Notifications
Font Size

Abstract Views: 146




  • Estimation of Morphometric Relationships for Flathead Sillago, Sillaginopsis panijus (Hamilton, 1822) in the Bay of Bengal (Bangladesh) using Multi-Linear Dimensions

Abstract Views: 146  | 

Authors

W. Sabbir
Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna – 9208, Bangladesh
F. A. Rima
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh
M. Y. Hossain
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh
M. A. Rahman
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh
S. Tanjin
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh
M. R. Hasan
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh
Z. Mawa
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh
M. A. Islam
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi – 6205, Bangladesh
M. N. Khan
Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna – 9208, Bangladesh

Abstract


This study on flathead sillago, Sillaginopsis panijus (Hamilton 1822) estimates the first morphometric relationships from the marine ecosystem, Bay of Bengal, Bangladesh using multi-linear dimensions. Additionally, meristic counts for different fin-rays were done. Alltogether, 204 specimens were captured during July 2018 to June 2019 by several gears including seine net and long lines. Morphometric measurements as well as body weight (BW) were recorded for each individual. The LWRs (length-weight relationships) were assessed as: W = a × Lb. Lateral line scales and fin rays were observed by magnifying glass. The LWRs and LLRs (length-length relationships) were found significant (p < 0.0001), with the r2 values being ≥ 0.913 and ≥ 0.952, respectively. Based on r2 values, LWRs by BW vs. SL and for LLRs, TL vs. FL were found as the best model. Fin formula observed for S. panijus is D1 IX; D2 I/24-28; P.17-20; Pv.1/5; A I-II/24-27; C 2/16-18. Scales on lateral line were ∼82-86. This investigation should be helpful for resource management in the marine ecosystems of Bangladesh and other subtropical countries.