An Evaluation Approach to Juvenile Catch Proportion in Dolnet (Stationary Bagnet): Insights from a Small-Scale Fishery along the Mumbai Coast

AKANKSHA; RAJESH KUMAR; ASHA TATERAO  LANDGE; KARANKUMAR RAMTEKE; ABUTHAGIR IBURAHIM S.; SHOBHA RAWAT

doi:10.54894/JISCAR.43.2.2025.170423

Authors

AKANKSHA ICAR- Central Institute of Fisheries Education, Mumbai - 400 061, Maharashtra, India
RAJESH KUMAR ICAR- Central Institute of Fisheries Education, Mumbai - 400 061, Maharashtra, India
ASHA TATERAO LANDGE ICAR- Central Institute of Fisheries Education, Mumbai - 400 061, Maharashtra, India
KARANKUMAR RAMTEKE ICAR- Central Institute of Fisheries Education, Mumbai - 400 061, Maharashtra, India
ABUTHAGIR IBURAHIM S. ICAR- Central Institute of Fisheries Education, Mumbai - 400 061, Maharashtra, India
SHOBHA RAWAT ICAR- Central Institute of Fisheries Education, Mumbai - 400 061, Maharashtra, India

https://doi.org/10.54894/JISCAR.43.2.2025.170423

Keywords:

Coilia dussumieri, Dolnet, Juvenile, Lepturacanthus savala, Resource management

Abstract

Fixed tapering stationary bagnet (dolnet) is a crucial method for traditional small-scale fishing practiced along the Maharashtra coast. Its passive fishing technique relies heavily on favorable currents for effectiveness. Despite its simplicity and cost-effectiveness, the dolnet leads to indiscriminate fishing practices, contributing to overfishing. This study focuses on assessing the juvenile estimation of two economically and ecologically important species, Lepturacanthus savala and Coilia dussumieri, caught in dolnets along the Mumbai coast. From January to June 2023, a total of 379 Lepturacanthus savala specimens (ranging from 15.4 cm to 66.2 cm total length) and 461 Coilia dussumieri specimens (ranging from 6.6 cm to 19.0 cm total length) were collected from dolnet catches in three major landing locations, namely Madh, Versova, and Manori. The analysis was done based on the length frequency data collected for both species from Madh, Versova and Manori. Manori consistently exhibited the highest juvenile percentages for both species, ranging from 68.18% to 100% for Lepturacanthus savala and 62.97% to 88.46% for Coilia dussumieri. Juvenile percentage for Lepturacanthus savala in Madh ranged from 60.71% to 100%, while in Versova it ranged from 30.43% to 57.89%. Also, the juvenile percentage for Coilia dussumieri ranged from 44.00% to 81.48% in Madh, while it ranged from 37.50% to 57.14% in Versova. These findings provide valuable data for informing future conservation and resource management strategies aimed at mitigating the impacts of dolnet fishing on these species. Enforcing a minimum legal mesh size larger than the currently used 8 - 12 mm in the cod-end, and spatial management in dolnet fisheries is essential to minimize juvenile exploitation, thus enhancing the spawning stock biomass and ensuring sustainable stock recruitment along the Mumbai coast.

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References

Ahmed, N. and Troell, M. (2010). Fishing for prawn larvae in Bangladesh: An important coastal livelihood causing negative effects on the environment. Ambio 39: 20-29.

Bal, D.V. and Joshi, M.S. (1956). Studies on the biology of Coilia dussumieri (Cuv. & Val.). Indian Journal of Fisheries 3(1).

Chavan, B.B. and Sundaram, S. (2005). Occurrence of juveniles of groupers in dol net landings at New Ferry Wharf, Mumbai. Marine Fisheries Information Service, Technical and Extension Series (186): 10–11.

Gadgil, M. (1967). On some aspects of the biology of Coilia dussumieri (Cuv. and Val.). Journal of the Bombay Natural History Society 64(1): 55-69.

Ghosh, S. and Vase, V. K. (2023). Reproductive and feeding biology of Goldspotted Grenadier Anchovy, Coilia dussumieri off Saurashtra Coast, Northern Arabian Sea. Thalassas: An International Journal of Marine Sciences 39(1):157-168.

Iburahim, A., Pradhan, S.K., Nirmal, T., Ratheesh Kumar, R., Kamat, S. and Shenoy, L. (2017). Catch composition and discards in set bagnets of Karanja estuary, Raigad, Maharashtra. Journal of Indian Fisheries Association 44: 17-29.

Islam, S., Malik, M.I., Hussain, S., Thursamy, R., Shujahat, M. and Sajjad, M. (2018). Motives of excessive Internet use and its impact on the academic performance of business students in Pakistan. Journal of Substance Use 23(1): 103-111.

James, P.S. B.R. and Badrudeen, M. (1981). Biology and fishery of silverbelly Leiognathus dussumieri (Valenciennes) from Gulf of Mannar. Indian Journal of Fisheries 28(1&2): 154-182.

Josekutty, C.J. and Sundaram, S. (2004). On the occurrence of juveniles of pomfrets in dol net catches at Trombay, Mumbai. Marine Fisheries Information Service, Technical and Extension Series (181): 10.

Khan, M.Z. (1986). Dol net fishery off Nawabunder (Gujarat). Fishery Technology 23: 92-99.

Khan, M.Z. (1987). A note on the dol-net fishery off Jaffrabad (Gujarat) with special reference to Bombay duck, from 1979-80 to 1981-82. Indian Journal of Fisheries 34(2): 188-192.

Kumawat, T., Shenoy, L., Chakraborty, S.K., Deshmukh, V.D. and Raje, S.G. (2015). Compliance of bag net fishery of Maharashtra coast, India with Article 7 of the FAO Code of Conduct for Responsible Fisheries. Marine Policy 56: 9-15.

Lazarus, S., Scariah, K.S., Khan, M.Z. and Velayudhan, A.K. (1992). Present status of exploitation of fish and shellfish resources: Ribbonfishes. CMFRI Bulletin 45: 121-132.

Manojkumar, B. and Dineshbabu, A.P. (1999). ‘Dol’net fisheries of the Saurashtra coast. Marine Fisheries Information Service, Technical and Extension Series 161: 1-8.

Nurul Amin, S.M. and Zafar, M. (2004). Studies on age, growth & virtual population analysis of Coilia dussumieri from the neretic waters of Bangladesh. Journal of Biological Sciences 4(3): 342-344.

Pakhmode, P.K. and Mohite, S.A. (2016). Study of gonad development using ova diameter analysis in ribbonfish, Lepturacanthus savala (Cuvier, 1829). IOSR Journal of Agriculture and Veterinary Science 9(2): 01-05.

Pakhmode, P.K., Mohite, S.A., Naik, S.D. and Mohite, A.S. (2013). Length frequency analysis and length-weight relationship of ribbonfish, Lepturacanthus Savala (Cuvier, 1829) off Ratnagiri coast, Maharashtra. International Journal of Fisheries and Aquatic Studies 1(2): 25-30.

Pillai, S.K. (1983). Some observations on dol (bag) net fishery at Sassoon dock, Bombay. Journal of the Bombay Natural History Society 82(3): 331-340.

Pradhan, S.K., Iburahim, S.A., Latha Shenoy, L.S., Ram Singh, R.S. and Nakhawa, A.D. (2019). Design and operational parameters of dol nets operated in Bhayander Estuary, Maharashtra.

Raje, S.G. and Ramamurthy, S. (1990). Cost and earning of two different sized ‘Dolnet’ boats at Versova (Bombay). Marine Fisheries Information Service, Technical and Extension Series 104: 6-8.

Ratheesh Kumar, R., Dineshbabu, A., Singh, V.V., Jaiswar, A.K., Shenoy, L., Shukla, S.P., Lekshmi, M. and Sreekanth, G.B. (2019). Temporal variations in catch composition of stationary bagnets along Maharashtra coast in relation to environmental factors. Journal of Experimental Zoology India 22(1): 251-263.

Rizvi, A.F. and Deshmukh, V.D. (2003). Growth parameters of Lepturacanthus savala (Cuvier, 1829) from Mumbai waters.

Shingadia, H.U. (2014). Length-weight relationship and relative condition factor of Coilia dussumieri (Cuv. & Val.) from Neretic waters off the Mumbai Coast. International Journal of Science and Research 3(5): 354-357.