Reproductive biology of the freshwater murrel Channa punctatus (Bloch, 1793) from River Gomti of Lucknow region, Uttar Pradesh, India

Abstract

A total of 187 samples of Channa punctatus (Bloch, 1793) from River Gomti of Lucknow region, Uttar Pradesh were studied during 2011. The sex ratio of 1: 0.84 was not significantly different from 1:1. Monthly variation in the gonadosomatic index (GSI) and maximum number of stage IV gonads encountered in the months of May to August indicated that the spawning season extends for about 4 months and spawning was high during the monsoon season. Absolute fecundity varied from 11000 to 28000, with an average value of 14920. Fecundity was found to be highly correlated to the total length (r = 0.9201), body weight (r = 0.9133) and weight of ovary (r = 0.8536) with all correlation coefficients being highly significant (p<0.0001). Total length (TL) of fish and weight of the ovary also highly correlated (r = 0.9551, p<0.0001). This study provides primary information on reproductive parameters of C. punctatus from River Gomti which can be utilised for management of the resource.

Aspects of reproductive biology of the lesser spiny eel Macrognathus aculeatus (Bloch, 1786) from river Ganga, Uttar Pradesh, India

“…Taslim et al (2002) pointed out that the co-efficient of correlation between fecundity versus TL and BW were found to range from 0.34-0.45 and 0.33-0.59 respectively in M. aculeatus. Similar observations were reported by many authors such as Das et al (1989) in Heteropneustes fossilis, Khan et al (2002) in Plotosus canius, Rheman et al (2002) in Liza parsia and by Kashyap et al (2016) in Channa punctatus. The finding of this study could be useful for management of the M. aculeatus stocks in the wild populations as well as under captive culture conditions.…”

“…Male dominancy over female may be due to accidental or natural mortality such as spawning stress of females in the population. reported by Abujam and Biswas (2011) and Kashyap et al (2016). However, it is worth mentioning here that several other workers (Qayyum and Qasim, 1964;Cardoso et al 2019) recorded the dominance of females over males.…”

“…Studies on reproductive biology of fish is considered to be important for their management under controlled conditions and also from the evolutionary point of view (Kashyap et al, 2016). The knowledge of reproductive potential of fish can be used in formulating the degree of rearing facilities needed and to assess the aquacultural potential.…”

Length-Weight and Length-Length Relationships of Heterotis niloticus (Cuvier, 1829) and Raiamas senegalensis (Steindachner, 1870)

“…The observed sex distribution among the species showed preponderance of males over females in their population. The sex ratio recorded in this study is in compliance with the works of Achakzai et al [36] in Manchar Lake, Kashyap et al [37] in Gomti River and Lawal et al [38] in Epe Lagoon.…”

“…Shafi and Yousuf [41] reported positive allometric growth for males (3.07) and negative allometric for females (2.77) in Schizothorax niger from Dal lake. In contrast, Kashyap et al [37] reported allometric growth for males and females from India with b value 2.95 (males) and 3.13 (females).…”