Baseline information of reproduction parameters of an amphidromous croaker Johnius coitor (Hamilton, 1822) from Ganga river basin, India with special reference to potential influence of climatic variability

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Table 1

Details of female J. coitor sampled from selected stretches of river Ganga.

Stretch	Parameters^#

	Length (cm)	Weight (gm)	GSI (units)	Condition factor (units)	Growth coefficient (b-value of LWR)^*
Middle stretch (Patna)	7.5–18.9	5.15–61.02	0.06–9.82	0.61–1.23	3.069
	(12.88 ± 0.21)	(22.01 ± 1.15)	(0.82 ± 0.10)	(0.88 ± 0.01)	(0.974, <0.01)
Anterior lower stretch (Farakka)	10.3–18.5	9.25–63.42	0.19–4.75	0.64–1.06	3.011
	(14.48 ± 0.17)	(27.51 ± 1)	(1.07 ± 0.05)	(0.86 ± 0.01)	(0.948, <0.01)
Posterior lower stretch (Triveni)	13–28.5	29–261	0.15–10.51	0.64–1.71	2.28
	(19.86 ± 0.47)	(93.01 ± 6.06)	(3.01 ± 0.3)	(1.15 ± 0.03)	(0.885, <0.01)
Overall	7.5–28.5	5.15–261	0.06–10.51	0.61–1.71	3.17
	(14.62 ± 0.2)	(36.39 ± 1.88)	(1.29 ± 0.09)	(0.92 ± 0.01)	(0.955, <0.01)

Data presented in range and mean ± standard error of mean (in parentheses).

Calculated using log transformed length–weight data of females and linear regression of length weight relationship (LWR). Calculated value of ‘b’ along with adjusted R² and p-value of LWR (in parentheses) given.

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