03 SEAFDEC/IFRDMD External Publications

High genetic diversity in anguillid glass eels across three Southeast Asian countries revealed through mitochondrial DNA D-loop sequences, with notes on population structure

2024-10-10T02:14:43Z

High genetic diversity in anguillid glass eels across three Southeast Asian countries revealed through mitochondrial DNA D-loop sequences, with notes on population structure Marini, Melfa; Pedrosa-Gerasmio, Ivane R.; Santos, Mudjekeewis D.; Romana-Eguia, Maria Rowena R.; Nguyen, Binh Thanh; Shibuno, Takuro Understanding the genetic diversity and population structure of anguillid eels is crucial for effective management. In this study, we used the mitochondrial DNA (mtDNA) D-loop marker to identify anguillid glass eels and assessed their genetic diversity across six sampling sites spanning three Southeast Asian countries. We also examined the population structures of Anguilla marmorata and A. celebesensis. We validated nine distinct species and subspecies of anguillid eels from 465 specimens collected in Indonesia (n = 246), the Philippines (n = 119), and Vietnam (n = 100). High gene diversities were observed across the species, ranging from 0.979 (A. celebesensis) to 1.000 (A. bicolor bicolor, A. marmorata, and A. interioris). Correspondingly, nucleotide diversity values were relatively low, varying from 0.036 (A. marmorata) to 0.057 (A. interioris). A. marmorata (n = 162) displayed a broad distribution, being observed across all six sites, with a significant yet low average fixation index of 0.05755. Pairwise comparisons of FST values between Cimandiri and other locations (except for Cagayan) were relatively high and statistically significant (p < 0.01), indicating significant genetic differentiation of Cimandiri samples compared to most locations in this study. On the other hand, A. celebesensis (n = 110), exhibited a non-significant and low fixation index (0.007), indicating no genetic differentiation in samples from Poso and Poigar Rivers, Indonesia. Our findings highlight the essential need for coordinated management strategies among regions that share common stocks. Additionally, this study underscores the efficacy of the mtDNA D-loop in precisely identifying glass eel species/subspecies and elucidating the genetic diversity and population structure of tropical anguillid eels.

Pengelolaan perikanan perairan darat di Indonesia

2023-08-10T08:39:37Z

Pengelolaan perikanan perairan darat di Indonesia Ramadian, Afzil; Muthmainnah, Dina Kata perairan mengacu pada badan air yang dapat ditemukan di lokasi tertentu, yang dapat bergerak, seperti sungai dan laut, atau diam, seperti danau. Perairan ini dapat memiliki komposisi yang berbeda, seperti air tawar, air payau, atau air asin, sehingga dapat dikatakan bahwa ada perairan tawar, perairan payau dan perairan laut. Di Indonesia, perairan darat (inland waters) didefinisikan oleh Saanin pada tahun 1960, sebagai perairan yang berada di atas daratan, mulai dari batas air laut surut terendah sampai ke daerah pedalaman/pegunungan. Dari definisi tersebut perairan darat meliputi sebagian perairan pantai, perairan payau dan perairan tawar. Kemudian pada tahun 1999, Sarnita dkk menggunakan istilah “perairan daratan pedalaman” sebagai terjemahan dari istilah “inland waters” yang digunakan oleh FAO dalam “FAO Technical Guidelines for Responsible Fisheries No.6. Inland Fisheries”.

Utilizing drone imagery to classify swamp cover in Patra Tani Village, South Sumatra Province, Indonesia

2026-09-30T07:37:22Z

Utilizing drone imagery to classify swamp cover in Patra Tani Village, South Sumatra Province, Indonesia Supriyadi, Freddy; Fahmi, Zulkarnaen; Muthmainnah, Dina; Ningsih, Ellis Nurjuliasti; Rais, Aroef Hukmanan; Suhaimi, Rezki Antoni; Sawestri, Sevi; Shimizu, Tomohito The initial step of successful land use is the selection of the appropriate location in line with the type or concentration of land exploration which requires land mapping. However, mapping activities undertaken in a territory with a comprehensively changing land cover, such as swamp ecosystems, requires considerable time and cost, which could make the work ineffective. Nevertheless, through technological developments, the land with changing ecosystem can be mapped easily using remote sensing systems and aerial photography by drones. The advantages of this technology are its effectiveness and efficiency in terms of time and cost. Under the project “Management Scheme of Inland Fisheries in the Southeast Asian Region,” implemented in 2020–2024 and supported by the Japanese Trust Fund VI Phase 2, SEAFDEC Inland Fishery Resources Development and Management Department (IFRDMD) conducted the study to monitor the land cover of the Special Area for Conservation and Fish Refugia (SPEECTRA) in a swamp area by using a drone. Drones could produce highresolution aerial images that can be quickly processed by analysis software such as geographic information systems and image classification algorithms. Using drone imagery to manage inland waters has great potential, both for monitoring the aquatic environmental health index and mitigating ecological damage.

Learning the lessons from the integrated small-scale inland fisheries business in Kampong Patin Village, Indonesia

2023-06-23T08:44:38Z

Learning the lessons from the integrated small-scale inland fisheries business in Kampong Patin Village, Indonesia Muthmainnah, Dina; Fahmi, Zulkarnaen; Supriyadi, Freddy; Rais, Aroef Hukmanan; Sawestri, Sevi; Prianto, Eko Inland fisheries are not often a priority in national and regional governance, being undervalued and overlooked, although it is recognized as important to food security, livelihoods, and human well-being. In inland waters, fishing is an important occupation for many rural people and plays a major role in social and economic development (Muthmainnah & Prisantoso, 2016). Inland fishery is also known as “subsistence fishing” or “family fishing.” The community who lives surrounding the waterbody perceives that inland fishery resource is common property and open to all at any time of the year. Since it is worked by individuals with traditional fishing gear and small boats, it is called small-scale fishery. Small-scale fisheries in inland waters are carried out in a wide diversity of ecosystems, namely: lakes, rivers, reservoirs, ponds, and wetlands (DFID, 2002), as well as in rice fields during the rainy season. However, inland fisheries are strongly impacted by other users of water and land resources, such as agriculture, transportation, and home industries. The management of inland fisheries requires an ecosystem approach and the engagement of relevant stakeholders. The priority focus of inland fishery management is sustainability to ensure that short-term actions do not jeopardize the options for future generations to benefit from the full range of goods and services provided by freshwater inland water ecosystems. SEAFDEC Inland Fishery Resources Development and Management Department (IFRDMD) is currently implementing the project “Management Scheme of Inland Fisheries in the Southeast Asian Region” with support from the Japan Trust Fund VI Phase 2. Under the Project, SEAFDEC/IFRDMD assessed the inland fisheries activities in Kampong Patin, XIII Koto Kampar District, Kampar Regency, Riau Province, Indonesia during 2020 to 2022 to obtain data and information on the potential of inland fisheries that would improve the livelihoods of local fishers.