Fish domestication is a key strategy in modern aquaculture. It is designed to promote sustainable production, reduce pressure on wild stocks, and meet the growing demand for high-value species. By adapting fish to controlled environments, researchers can develop reliable breeding and rearing protocols that support both conservation and food security goals.

A notable example is the domestication of pigek (Mesopristes cancellatus), a highly prized freshwater species in the Philippines. Wild populations of pigek have declined sharply due to overharvesting, habitat loss, and climate-related impacts, making its domestication a vital step in protecting the species while sustaining local food systems.

To meet these challenges, ongoing research focuses on breeding, feeding, and habitat management techniques for pigek in captivity. These efforts aim not only to ensure consistent aquaculture production but also to generate knowledge that can guide the conservation of remaining wild populations.

Prized fish facing growing pressure

Pigek, a cross-barred grunt, is a freshwater-to-estuarine fish easily recognized by its dark vertical bars and the distinctive grunting sound it produces by grinding its teeth. It is commonly found and harvested in major river systems such as the Rio Grande de Mindanao, Tamontaka River, Pulangi River in Bukidnon, and the Abra River, where it has long been part of local fisheries and food traditions.

Highly prized for its delicate, flavorful meat, pigek is often compared to premium species such as grouper and blue marlin. Regarded as a delicacy, it is typically served during special occasions and commands a high market price, ranging from PhP 600 to PhP 1,200 per kilogram. This strong consumer demand, coupled with its limited supply, has contributed to its increasing value, and its growing scarcity in the wild.

In recent years, however, pigek populations have come under mounting pressure. Indiscriminate harvesting in major river systems, driven by rising market demand, has been compounded by environmental stressors such as flooding, prolonged dry periods associated with El Niño, pollution, and habitat degradation. These factors have resulted in declining catches and shrinking natural populations, raising concerns over the long-term availability of the species.

The continued reliance on wild capture underscores the urgency of developing sustainable management measures and aquaculture-based solutions to protect remaining stocks while meeting market demand.

R&D study to domesticate pigek

To support sustainable aquaculture development and reduce dependence on wild stocks, DA-NFRDI, through the Brackishwater Fisheries Research and Development Center (BFRDC) in Lala, Lanao del Norte, conducted a research and development study to domesticate pigek, a highly valued freshwater species.

The study aimed to generate baseline biological and culture information and to develop preliminary techniques for rearing pigek under controlled conditions. Key activities included collecting specimens from multiple sites, acclimatizing them to captivity, formulating feeding strategies, and establishing initial broodstock conditioning and breeding protocols.

By assessing the species’ ability to survive, grow, and adapt in captivity, the project laid the groundwork for future aquaculture production. These efforts are a critical step toward easing pressure on remaining riverine populations and ensuring a more stable and sustainable supply of pigek, which currently relies entirely on wild capture.

Assessing adaptability in captivity

The study collected 63 pigek from verified sites, with 20 live individuals acclimatized and maintained in captivity for feeding and water management trials. Results demonstrated that pigek can survive and grow under controlled freshwater conditions, highlighting its ability to adapt to captive environments.

Feeding trials revealed that diet is a critical factor in domestication success. Researchers tested several feed options, including squid, sandworm, shrimp, and trashfish, to evaluate their effects on growth and survival. Preliminary results showed substantial growth and high survival in fish fed with squid, sandworm, and shrimp.

Ongoing research continues to refine feeding protocols and explore additional feed sources to further improve growth performance under captivity. Meanwhile, water quality remained within acceptable ranges, confirming that pigek can be successfully reared using standard freshwater aquaculture systems.

Toward sustainable pigek aquaculture

The project has demonstrated pigek’s technical viability as a candidate for future aquaculture, providing the scientific foundation needed for its domestication. By showing that pigek can survive, grow, and adapt in captivity, the study supports the development of sustainable fingerling production and broodstock management strategies, essential steps for establishing a reliable aquaculture system.

In the long term, domestication offers multiple benefits. It can help stabilize supply, reduce pressure on declining wild populations, and contribute to the conservation of freshwater resources. As research progresses toward induced breeding and large-scale culture, pigek aquaculture presents a viable path for balancing economic demand with environmental sustainability.

Ultimately, these efforts aim to ensure that this high-value fish remains accessible for local communities and markets while safeguarding river ecosystems for future generations. Pigek domestication is not just a scientific achievement, it represents a model for responsible aquaculture development in the Philippines. ### (Rita dela Cruz)