<abstract xmlns="http://www.w3.org/1999/xhtml">Allometry, condition index and sex ratio in freshwater mussel <italic>Lamellidens corrianus</italic> (Lea, 1834) were studied from the freshwater lake at Rajshahi, Northwest Bangladesh during the summer 2013. The collected mussel specimens ranged from 3.69 cm to 9.98 cm in length, and 4.82 g to 80.67 g in weight. The study was focused on the relationships between length-height and length-weights (length-total weight, length-tissue wet weight, length-shell wet weight, length-tissue dry weight and length-shell dry weight), which were found not to be significantly different between male and female (P&lt;0.05). The calculated regression equation of length-height relationship for the entire study period was H= 0.5215L-0.1482 for combined sex. The equations of length-total weight, length-tissue wet weight, length-shell weight, length-tissue dry weight and length-shell dry weight relationships of mussel were W= 0.1756L2.6775, W= 0.0261L2.8919, W= 0.0261L2.5524, W= 0.0065L2.8946 and W= 0.095L2.5109, respectively for combined sex. The relationships between length and height were linear, while that between length-weights follow the non-linear pattern. The overall male to female sex ratio was 1: 0.92 and did not differ significantly from the expected 1: 1 ratio (<italic>x</italic>2-test, P&lt;0.05). The condition index for male, female and combined sex was 13.54, 13.97 and 13.74, respectively. The results of this study will provide baseline information for fisheries researchers and for the further assessment and management of mussels in the freshwater ecosystems of Bangladesh.</abstract>

Allometry, condition index and sex ratio in freshwater mussel Lamellidens corrianus (Lea, 1834) were studied from the freshwater lake at Rajshahi, Northwest Bangladesh during the summer 2013. The collected mussel specimens ranged from 3.69 cm to 9.98 cm in length, and 4.82 g to 80.67 g in weight. The study was focused on the relationships between length-height and length-weights (length-total weight, length-tissue wet weight, length-shell wet weight, length-tissue dry weight and length-shell dry weight), which were found not to be significantly different between male and female (P<0.05). The calculated regression equation of length-height relationship for the entire study period was H= 0.5215L-0.1482 for combined sex. The equations of length-total weight, length-tissue wet weight, length-shell weight, length-tissue dry weight and length-shell dry weight relationships of mussel were W= 0.1756L2.6775, W= 0.0261L2.8919, W= 0.0261L2.5524, W= 0.0065L2.8946 and W= 0.095L2.5109, respectively for combined sex. The relationships between length and height were linear, while that between length-weights follow the non-linear pattern. The overall male to female sex ratio was 1: 0.92 and did not differ significantly from the expected 1: 1 ratio (x2-test, P<0.05). The condition index for male, female and combined sex was 13.54, 13.97 and 13.74, respectively. The results of this study will provide baseline information for fisheries researchers and for the further assessment and management of mussels in the freshwater ecosystems of Bangladesh.

Length-Weight Relationships, Condition Index and Sex Ratio of Mussel <italic>Lamellidens corrianus</italic> (Lea, 1834) in a Freshwater Lake, Northwest Bangladesh

Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205,

Croatian Journal of Fisheries

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Length-Weight Relationships, Condition Index and Sex Ratio of Mussel  (Lea, 1834) in a Freshwater Lake, Northwest Bangladesh

Allometry, condition index and sex ratio in freshwater mussel Lamellidens corrianus (Lea, 1834) were studied from the freshwater lake at Rajshahi, Northwest...

Length-Weight Relationships, Condition Index and Sex Ratio of Mussel Lamellidens corrianus (Lea, 1834) in a Freshwater Lake, Northwest Bangladesh

Published Online: Dec 23, 2016

Page range: 172 - 178

Received: Nov 05, 2015

Accepted: Jul 29, 2016

DOI: https://doi.org/10.1515/cjf-2016-0025

Keywords
Length-weight relationship, Condition index, Bangladesh

© 2016 Mostafizur Rahman Mondol et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Length-Weight Relationships, Condition Index and Sex Ratio of Mussel Lamellidens corrianus (Lea, 1834) in a Freshwater Lake, Northwest Bangladesh

Published Online: Dec 23, 2016

Page range: 172 - 178

Received: Nov 05, 2015

Accepted: Jul 29, 2016

DOI: https://doi.org/10.1515/cjf-2016-0025

KeywordsLength-weight relationship, Condition index, Bangladesh

© 2016 Mostafizur Rahman Mondol et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Length-weight relationship, Condition index, Bangladesh