Socio Today
The waters of the Bengkalis and Malacca Straits have long held a mythical aura for the coastal communities of Riau, Indonesia. For generations, local fishermen like Muhammad Yunus of Penampi Village have shared folklore about the terubuk fish (Tenualosa macrura), a species deeply woven into the cultural identity, historical commerce, and daily survival of the region. Described in local lore as an immortal blessing from the divine, the terubuk is said to return in endless abundance no matter how many are harvested. However, the realities of modern overfishing, escalating market values, and shifting ecological pressures have turned this romanticized coastal narrative into a critical conservation crisis. Today, the majestic terubuk stands at a crossroads, balancing delicately between extinction and the stringent, often contested protective regulations designed to save it.
Historical Legacy and Global Prominence
Long before modern environmental monitoring systems were established, the terubuk of the Bengkalis Strait commanded international renown. Historical archives indicate that the fish and its prized roe have driven trade and geopolitical ambitions for centuries. In 1539, Portuguese explorer Fernão Mendes Pinto documented being served terubuk roe during a journey through Bukit Batu and Bengkalis, enthusiastically dubbing the delicacy the "caviar of Southeast Asia." Decades later, in 1598, Dutch cartographer and explorer Willem Lodewijcksz mapped Bengkalis, explicitly highlighting the region as a primary global source of terubuk roe.
The economic weight of the species even shaped the rise of regional powers. A century after Lodewijcksz’s mapping, Raja Kecik, the founder of the Siak Sultanate, leveraged the lucrative trade of terubuk roe to amass the financial capital necessary to launch a military campaign and seize the throne of the Johor Kingdom. By the 19th century, during the colonial administration of the Dutch East Indies, emissary J.S.G. Gramberg documented the staggering scale of the fishery. Following missions by British explorer John Anderson in 1823, records showed that between 14 million and 15 million terubuk were harvested annually. The resulting export of dried fish and roe generated an impressive 72,000 guilders for the local sultanate, cementing the species as a cornerstone of the regional economy.
Cultural Conservation and the Legend of Datuk Laksamana
As commercial harvesting intensified, early coastal societies recognized the urgent need to regulate fishing pressure long before modern conservation science emerged. This realization birthed the traditional ritual known as semah terubuk. Centered around the legendary figure of Datuk Laksamana Raja in Laut—the maritime commander of the Siak Sultanate appointed to secure the Malacca Strait—the annual ritual functioned as an ingenious indigenous conservation framework.
Led historically by traditional spiritual authorities, the semah terubuk ceremony incorporated strict temporal bans on fishing. Spanning approximately three months during peak spawning periods, particularly aligning with lunar phases such as the full moon, communities were legally and culturally prohibited from harvesting terubuk. Professor Deni Efizon, a marine fisheries researcher from the University of Riau who has dedicated decades to studying the species, notes that this traditional mysticism served a profound ecological purpose. Rather than existing as mere superstition, the ritual represented an advanced form of axiological conservation, successfully limiting fishing mortality during the critical gonad maturation phase.
However, with the passing of the traditional elite, the fading influence of customary leaders, and the commercialization of local livelihoods, these community-led taboos steadily eroded.
The Modern Precipice: Economic Pressures and Population Decline
In contemporary Bengkalis, the cultural reverence for the terubuk has been largely overshadowed by soaring economic incentives. With market demand for egg-bearing female terubuk skyrocketing, individual fish can command prices as high as one million rupiah each. This staggering commercial value has fueled intensive, unregulated hunting, leaving female terubuk little to no opportunity to spawn before capture.
Alarmed by the rapidly dwindling populations, researchers from the University of Riau joined forces with international marine scientists from Australia’s CSIRO in 2010 to conduct comprehensive stock assessments. Their findings confirmed severe overfishing and recruitment failure, prompting a cascade of legal interventions aimed at shielding the species from commercial collapse.
The legislative framework began with the Bengkalis Regency Regulation No. 15 of 2010, which established local terubuk sanctuary zones. This was swiftly followed by national recognition through the Ministry of Marine Affairs and Fisheries (MMAF) Decree No. 59 of 2011, granting the species a protected status of limited utilization within the Bengkalis Strait. The Provincial Government of Riau reinforced these measures in 2012 with Regional Regulation No. 78.
Regulatory Evolution and Implementation Hurdles
Recognizing that initial conservation models faced enforcement hurdles and failed to adequately curb illegal harvesting during spawning windows, the Indonesian government overhauled its legislative approach. In 2023, the MMAF issued Decree No. 210, replacing the 2011 regulations. The updated decree refined the closed-season calendar, shifting from specific Gregorian months to precise lunar phases based on the Hijri calendar—specifically targeting sacred months such as Syawal, Zulkaidah, Zulhijah, and Muharam during key dark moon and full moon cycles.
Furthermore, acknowledging that historical regulations unfairly shouldered the blame entirely onto local fishers while ignoring broader environmental stressors, authorities pushed for broader spatial management. The implementation of MMAF Decree No. 36 of 2026 established comprehensive aquatic conservation zones across the waters of Bengkalis, Siak, and Kepulauan Meranti Regencies. This modern zoning strategy aims to protect not just the fish, but its entire ecological habitat, accounting for anthropogenic pressures such as commercial shipping lanes, industrial barge traffic, and water pollution.
Despite these regulatory milestones, securing compliance on the ground remains an uphill battle. Many generational fishermen express deep resentment toward top-down conservation policies that criminalize practices handed down through centuries. Veteran fishers argue that regulations strip away their ancestral livelihoods without offering viable economic alternatives. Incidents involving authorities seizing catches from fishers operating during closed seasons using small-mesh nets highlight a persistent disconnect between state-led conservation mandates and the socioeconomic survival needs of coastal households.
As experts like Professor Deni Efizon observe, enforcing modern legal frameworks without addressing the fundamental economic vulnerabilities of local fishing communities risks alienating the very population whose cooperation is essential for the species’ survival. Ensuring the future of the Tenualosa macrura requires bridging the gap between rigorous scientific conservation, habitat protection, and livelihood security—proving that saving the legendary caviar of Southeast Asia demands as much attention to human sustainability as it does to marine ecology.
