LENGTH-WEIGHT RELATIONSHIP OF SPINY EEL Macrognathus pancalus (Hamilton-Buchanan) FROM UPPER ASSAM, INDIA

Year 2016, Volume: 2 Issue: 2, 50 - 60, 01.04.2016

Santoshkumar Singh Abujam Shyama Prasad Biswas

https://doi.org/10.3153/JAEFR16007

Abstract

Length-weight relationship of Macrognathus pancalus had been carried
out from two different waterbodies of upper Assam during 2009-2011. The pool
data for the co-efficient of regression (b) was recorded as 1.408 in juveniles;
2.977 in males; 3.034 in females. It reveals that females have better growth
than males and juvenile. The ‘b’ for males was found to be minimum (1.408) in
6-9 cm and maximum (3.024) in15-18 cm whereas, for females the lowest (1.807)
in 9-12 cm and highest (3.202) in >15 cm groups. In different seasons, the
‘b’ value ranged from 2.982 (pre-monsoon) to 3.253 (winter) for males while for
females, from 2.825 (post-monsoon) to 3.571 (winter). It indicates that both
the sexes did not follow the cube law (b=3). The higher condition factor ‘K’ for
males (4.622) and females (4.362) were observed in 9-12 cm and lower values for
males (4.128) and for females (3.961) were recorded in 12-15 cm and >15 cm
length group. The maximum (4.282) and minimum (3.686) of ‘K’ for males were
recorded in post monsoon and pre-monsoon while in female, the maximum (4.376)
in monsoon and minimum (3.913) in winter. It reveals that the species were in
good conditions. The ‘r’ values for in all cases were found to be highly
correlated between length and weight. 

Keywords

Macrognathus pancalus, Length-weight, Condition factor, Assam, India

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