Stock Assessment of a Non-Commercial Fish Sciaena coitor (Hamilton, 1822) from Middle Stretch of River Ganga

Rizvi, Anees Fatima; Singh, K. P.; Kumar, Niraj

doi:10.1007/s40009-014-0301-0

Cited by 3 publications

(13 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This remains to be a researchable issue whether the adults of J. coitor from brackishwater, marine zones are capable of retaining gonadal maturity for most part of the year while adults in freshwater condition attain maturity only during a particular season (late winter/pre-monsoon). Review of literature revealed no historical record of breeding period for this fish species except one observation recently by Rizvi et al (2015) from upper stretch of river Ganga (Allahabad) where it was stated that J. coitor breeds in three pulses (maximum July-September>January-May>October-December minimum) throughout the year; different from our observations in Patna-Farakka stretch but similar to Triveni stretch. Such high spatial variations in breeding season have been documented by Kumar et al (2013) in a phylogenetically close relative J. carutta from Indian waters.…”

Section: Breeding Phenologycontrasting

confidence: 99%

“…Only one previous record of L 50 (range 11-12 cm, median 11.5 cm) of J. coitor have been reported from upper stretch of river Ganga (Rizvi et al, 2015) as a part of stock assessment study; interestingly matching with our first maturity estimate (11.4 cm) that we assessed in addition to L 50 . However it is not clear whether male or female or pooled data of J. coitor was used by Rizvi et al (2015) for estimation of L 50 .…”

Section: Size At Maturitysupporting

confidence: 79%

“…Our study hints towards the climate resilient nature of J. coitor in terms of reproduction. In the absence of any historical data on breeding season of this species except Rizvi et al (2015), further research is required to validate the present hypotheses.…”

Section: Climato-hydrological Influence and Threshold Gsimentioning

confidence: 92%

“…In terms of conservation status, J. coitor has been listed as a least concern species (Anon, 2016;Froese and Pauly, 2017). In India, the lesser sciaenid J. coitor forms a fishery throughout the year in upper stretch of river Ganga and the fish appears to be optimally exploited; being a small fish from the tropical region it also shows faster growth with high natural mortality (Rizvi et al, 2015). In terms of economic importance, coitor croakers fetch a moderate price of INR 300-400/kg (USD 4.5-6.0/kg).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, report of a natural ecto-parasite of this species also exists (Kibria et al, 2011). Recently, studies by Rizvi et al (2015) provided new information on length-weight relationship (LWR), age-growth model and stock dynamics, that were absent before, from upper stretch of river Ganga (Allahabad, India). However, information on reproductive biology of J. coitor and its relation to climatic factors is meagre or unavailable.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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

Sarkar

Naskar

Roy

et al. 2017

Aquat. Living Resour.

View full text Add to dashboard Cite

Reproductive biology of female amphidromous croaker Johnius coitor (Hamilton, 1822) was studied for the first time from various freshwater stretches of Ganga river basin, India in relation to climatic variability. The species showed high spatial variation in reproductive phenology and capable of breeding during pre-monsoon, monsoon, post-monsoon and winter. Water temperature is the most crucial environmental parameter influencing gonadal maturation and breeding. Generalized additive model (GAM) models revealed water temperature near 23–25 °C as optimum and threshold GSI above 3 units necessary for breeding. Pre-spawning fitness (Kspawn50) and size at 50% maturity (LM50) benchmarked through Kaplan-Meier survival fit estimates were in the range 1.27–1.37 units and 19–24.5 cm respectively. First maturity of females was encountered at 11.4 cm within the size range 7.2–28.5 cm. Egg parameters in mature-ripe females ranged between 0.29–0.80 mm (diameter), 0.05–0.19 mg (weight) and 5687–121 849 eggs (absolute fecundity). Mapping of climate preferendum through LOESS smoothing technique hinted water temperatures <20 °C and >32 °C to be detrimental for attainment of pre-spawning fitness while no dependence on rainfall was observed. Based on the climato-hydrological influence on breeding and regional trends of changing climate along river Ganga, we infer minimal climate driven changes in breeding phenology of this amphidromous fish species. Results of this study may serve as baseline information for future studies assessing climate driven changes and evolutionary adaptations in croakers from river Ganga.

show abstract

Section: Breeding Phenologycontrasting

confidence: 99%

Section: Size At Maturitysupporting

confidence: 79%

Section: Climato-hydrological Influence and Threshold Gsimentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Sarkar

Naskar

Roy

et al. 2017

Aquat. Living Resour.

View full text Add to dashboard Cite

show abstract

Studies on the growth and mortality of invasive Oreochromis niloticus (Linnaeus, 1758) in sub-tropical river Yamuna, part of Gangetic River system, India

Alam

Chadha

Chakraborty

et al. 2019

Aquatic Ecosystem Health &Amp; Management

View full text Add to dashboard Cite

Growth parameters, mortality, growth performance index and exploitation ratio of Oreochromis niloticus were assessed based on the length-frequency data collected fortnightly from the Allahabad stretch of the Yamuna, India, during September 2011 to August 2013. The size of the catch ranged between 70 and 495 mm total length. The data was analyzed using the Electronic Length Frequency Analysis module in FiSAT software. Asymptotic length and growth coefficient were estimated as 562 mm total length and 0.58 year−1, respectively. Total mortality, natural mortality and fishing mortality coefficients were 3.74, 1.015 and 2.725 yr−1, respectively. The growth coefficient index was calculated as 3.26. The exploitation ratio worked out as 0.667, indicated that the stock was slightly overexploited. Estimated growth at the end of I, II and III years was 247, 386 and 463 mm total length, respectively. The observed multi-year survivorship based on the length frequency data from the river Yamuna in O. niloticus suggested that it has successfully established in the non-native environment and is rapidly spreading in other tributaries of the river Ganga. The recruitment pattern was observed to be continuous throughout the year, with several micro-cohorts and two overlapping peaks of unequal pulse strengths. Estimated maximum sustainable yield for this species in the Allahabad stretch of the river Yamuna was 27.13 t. This study can form an important base for future research work in the management of this invasive species in the Gangetic river system in India.

show abstract

Stock Status of a Few Small Indigenous Fish Species Exploited in the River Ganga, India

Ray,

Das,

Bhakta

et al. 2023

Fishes

View full text Add to dashboard Cite

The River Ganga produces a substantial amount of its fish from small native species, defined here as those with a maximum length of 25 cm. The FiSAT program was utilized to estimate stock assessments of four important small indigenous species from the River Ganga: Johnius coitor, Cabdio morar, Salmostoma bacaila, and Gudusia chapra. Fish samples were collected monthly for a year (April 2020–May 2021) from four predetermined sampling sites along the River Ganga (Farakka, Berhampore, Balagarh, and Tribeni) in West Bengal, India. The estimated exploitation rate for Johnius coitor, Salmostoma bacaila, and Gudusia chapra was relatively lower than the optimum level of 0.5 and considerably lower than Emax values, indicating that their stocks are experiencing low fishing pressure in the region. The FiSAT results indicated that the species Cabdio morar was found to be heavily exploited. The total mortality (Z), natural mortality (M), and fishing mortality (F) rates for all four of the SIF species were examined, and they were contrasted with data from previous studies. On the lower stretch of the River Ganga, all of the fish stocks are optimally exploited (Eopt), except for the species Cabdio morar. The population dynamics of all of the species have been described for the first time on the lower stretch of the River Ganga. According to the findings, all of the fish stocks throughout the lower stretch of River Ganga are optimally exploited (Eopt), except for Cabdio morar. The study also emphasizes the importance of increasing sustainable fishing efforts, focusing on SIFs throughout the lower stretch of the River Ganga in order to safeguard the livelihood and nutritional status of fishermen.

show abstract

Stock Assessment of a Non-Commercial Fish Sciaena coitor (Hamilton, 1822) from Middle Stretch of River Ganga

Cited by 3 publications

References 3 publications

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

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

Studies on the growth and mortality of invasive Oreochromis niloticus (Linnaeus, 1758) in sub-tropical river Yamuna, part of Gangetic River system, India

Stock Status of a Few Small Indigenous Fish Species Exploited in the River Ganga, India

Contact Info

Product

Resources

About