Overfishing — the threat to ocean wealth, livelihoods, Pg6

India’s marine fishery output has stabilised at 4 million tonnes annually, but small-scale fishers (90%) catch only 10% of this, with the rest by large mechanised trawlers.

• Three-quarters of marine fisher families live below poverty line.

• Juvenile fishing and bycatch—especially from shrimp trawling—lead to massive waste: for every 1 kg shrimp, over 10 kg of marine species are discarded.

• Regulatory challenges persist due to uncoordinated and fragmented state-level fisheries laws (MFRA).

Problems with Current Practices:

• Bycatch waste: Discards include juveniles and non-target species, damaging marine biodiversity and ecosystem food webs.

• Juvenile fish entry through sub-legal mesh size nets (<25mm) reduces fishery stocks and long-term reproductive potential.

• Open-access trawling across state borders allows unsustainable and unmonitored exploitation.

• Economic pressure on fishers pushes them to invest in bigger boats and engines, but with little actual benefit due to increased cost, reduced catch.

Environmental Consequences:

• Depletion of fish stock, degradation of reefs, destruction of oceanic biodiversity.

• Declines in commercially important species like sardines and mackerels—some collapses may take decades to reverse.

Suggested Solutions:

• Minimum Legal Size (MLS) enforcement to protect juveniles (e.g., Kerala’s MLS increased threadfin bream maturity size).

• Science-based quotas and seasonal bans, like New Zealand’s QMS model.

• Aquaculture broodstock reform: Align fishery profits with conservation by preventing wild stock overdependence.

• Real-time patrolling and MCS (Monitoring Control and Surveillance) tools to improve compliance.

• Fisher cooperatives should be empowered as co-managers of Marine Protected Areas (MPAs).

• Urban consumers must choose sustainably sourced, small-scale fish products.

Legal and Policy Coordination:

• Need to unify fragmented State laws into a national Marine Fisheries Code.

• Stronger central enforcement, better gear regulation, and ecosystem-based management are required.

Key Concepts:

• Bycatch: Non-target fish or other marine life unintentionally caught during fishing.

• Juvenile Fishing: Catching fish before they reach reproductive age; severely impacts stock renewal.

• QMS (Quota Management System): Science-led method to cap total catch and protect long-term sustainability.

Significance:

• Marine overexploitation threatens not just biodiversity but also food security, employment, and coastal economies.

• India’s coastal population and fishery-dependent livelihoods need inclusive, science-backed, and community-led reforms.

• Aligning fisher incentives with ecosystem health ensures both economic and environmental sustainability.

Mains Mock Question:

Discuss the ecological and socio-economic consequences of overfishing in India. What policy and regulatory interventions are required to make marine fisheries sustainable and equitable?