Occurrence of Anguilla luzonensis in the Tributaries along the Lagonoy Gulf, Philippines

Katrina L. Canon (Graduate School of Integrated Arts and Sciences, Kochi University, Kohasu, Oko, Nankoku, Kochi 783-8505, Japan;Bicol University Tabaco Campus, Tabaco City 4511, Albay, Philippines)
Plutomeo M. Nieves (Bicol University Tabaco Campus, Tabaco City 4511, Albay, Philippines)
Antonino B. Mendoza Jr. (Bicol University Tabaco Campus, Tabaco City 4511, Albay, Philippines)
John Christopher C. Nolial (Bicol University Tabaco Campus, Tabaco City 4511, Albay, Philippines)
Niño C. Celestial (Bicol University Tabaco Campus, Tabaco City 4511, Albay, Philippines)
Ronie O. Mediario (Bicol University Tabaco Campus, Tabaco City 4511, Albay, Philippines)
Raul G. Bradecina (Partido State University, Goa 4422, Camarines Sur, Philippines)
Teresa N. Avila (Graduate School of Integrated Arts and Sciences, Kochi University, Kohasu, Oko, Nankoku, Kochi 783-8505, Japan;Partido State University, Goa 4422, Camarines Sur, Philippines)
Satoshi Kubota (Graduate School of Integrated Arts and Sciences, Kochi University, Kohasu, Oko, Nankoku, Kochi 783-8505, Japan)

Article ID: 3010

DOI: https://doi.org/10.30564/jfsr.v3i1.3010


Anguillids are а valuable fish commodity worldwide. Although Anguilla luzonensis have been abundantly found in the northern Philippines and collected for trade, no available records show that it recruited in the midpart where Lagonoy Gulf, Bicol is situated. In this study, we investigated the occurrence of A. luzonensis in the tributaries along the Lagonoy Gulf, Philippines using molecular tools. Glass eel specimens were collected in 2018–2019 from the Comun river, Albay; the Lagonoy river, Camarines Sur; and the Bato river, Catanduanes. Anguilla luzonensis was first reported in Lagonoy Gulf using molecular analysis. A. luzonensis was the second most abundant species in the Comun and Lagonoy rivers (9.5 and 22.4 %, respectively). Anguilla luzonensis collected from the Comun and Lagonoy rivers did not show a significant difference (FST= 0.00825, p>0.05). Anguilla marmorata was the most dominant species in all tributaries (71.1–98.0 %). In the Comun and Lagonoy rivers, A. bicolor pacifica was the third most abundant species (7.7 and 6.5 %, respectively). In addition, Anguilla celebesensis was only found rarely in the Comun river (0.9 %). This study provides important information for sustainable resource management and effective utilization of the eel species in these regions.


Anguilla; Glass eels; Species composition; PCR-RFLP; DNA sequencing; Diversity

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[1] Aoyama, J., Yoshinaga, T., Shinoda, A., Shirotori, F., Yambot, A., Han, Y-S. Seasonal Changes in Species Composition of Glass Eels of the Genus Anguilla (Teleostei: Anguillidae) Recruiting to the Cagayan River, Luzon Island, the Philippines [J]. Pacific Science, 2015, 69(2):263- 270. DOI:10.2984/69.2.8.

[2] Han Y-S, Yambot AV, Zhang H, Hung C-L. Sympatric Spawning but Allopatric Distribution of Anguilla japonica and Anguilla marmorata: Temperature- and Oceanic Current-Dependent Sieving [J]. PLoS ONE, 2012, 7(6):e37484. DOI: 10.1371/journal.pone.0037484.

[3] Han, Y-S., Lin, Y-F., Wu, C. R., Iizuka, Y., Castillo, T. R., Yambot, I. U., Mamalangkap, M. D., Yambot, A. V. Biogeographic distribution of the eel Anguilla luzonensis: Dependence upon larval duration and oceanic currents [J]. Marine Ecology Progress Series, 2016, 551:227-238. DOI: 10.3354/meps11728.

[4] Jamandre, B.W., Shen, K-N., Yambot, A.V., Tzeng, W-N. Molecular phylogeny of Philippine freshwater eels Anguilla spp. (Actinopterygi: Anguilliformes: Anguillidae) inferred from mitochondrial DNA [J]. The Raffles Bulletin of Zoology, 2007, 14:51-59.

[5] Southeast Asian Fisheries Development Center (SEAFDEC). Enhancing Sustainable Utilization and Management Scheme of Tropical Anguillid Eel Resources in Southeast Asia (Report on the JAIF Project) [R]. 2019.

[6] Shirotori, F., Ishikawa, T., Tanaka, C., Aoyama, J., Shinoda, A., Yambot, A. V., Yoshinaga, T. Species composition of anguillid glass eels recruited at southern Mindanao Island, the Philippines [J]. Fisheries Science, 2016, 82:915- 922. DOI: 10.1007/s12562-016-1030-8.

[7] Yoshinaga, T., Aoyama, J., Shinoda, A., Watanabe, S., Azanza, R. V., Tsukamoto, K. Occurrence and biological characteristics of glass eels of the Japanese eel Anguilla japonica at the Cagayan River of Luzon Island, Philippines in 2009 [J]. Zoological Studies, 2014, 53(13). DOI: 10.1186/1810-522X-53-13.

[8] Crook, V. Slipping away: International Anguilla eel trade and the role of the Philippines [R]. TRAFFIC and ZSL, 2014, UK. ISBN 978-1-85850-376-9.

[9] Watanabe, S., Aoyama, J., Tsukamoto, K. A new species of freshwater eel Anguilla luzonensis (Teleostei: Anguillidae) from Luzon Island of the Philippines [J]. Fisheries Science, 2009, 75:387- 392. DOI:10.1007/s12562-009-0087-z.

[10] Ame, E. C., Ayson, J. P., and Ame, R. B. Status of Elvers Fisheries in Cagayan Province, Luzon, Philippines [J]. Kuroshio Science, 2013, 7(1):41-48.

[11] UN Office on Drugs and Crime (UNODC). World wildlife crime report: trafficking in protected species [R]. UNODC, Vienna, 2016.

[12] Gollock, M., Shiraishi, H., Carrizo, S., Crook, V., Levy, E. Status of non-CITES listed anguillid eels [R]. AC30 Doc. 18.1, Annex 2, 1-176, 2018.

[13] Pike, C., Crook, V., Jacoby, D. & Gollock, M. Anguilla luzonensis (amended version of 2019 assessment). The IUCN Red List of Threatened Species 2020 [R]: e.T18435966A176497159. 2020. DOI: 10.2305/IUCN.UK.2020- 3.RLTS.T18435966 A176497159.en.

[14] Kita, M., Matsushige, K., Endo, S., Mochioka, N., Tachihara, K. First Japanese records of Anguilla luzonensis (Osteichthyes: Anguilliformes: Anguillidae) glass eels from Okinawa-jima Island, Ryukyu Archipelago, Japan [J]. Species Diversity, 2021, 26(1):31-36. DOI: 10.12782/specdiv.26.31.

[15] Kuroki, M., Miller, M.J., Aoyama, J., Watanabe, S., Yoshinaga, T., Tsukamoto, K. Offshore spawning for the newly discovered Anguillid species Anguilla luzonensis (Tele- ostei: Anguillidae) in the western North Pacific [J]. Pacific Science, 2012, 66:497−507 DOI: 10.2984/66.4.7.

[16] Qu, T. and Lukas, R. The bifurcation of the North Equatorial Current in the Pacific [J]. Journal of Physical Oceanography, 2003, 33:5−18. DOI: 10.1175/1520-0485(2003)0332.0.CO;2.

[17] Department of Agriculture - Bureau of Fisheries and Aquatic Resources. (DA-BFAR). Philippine Fisheries Profile 2018 [R]. Manila, Philippines: DA-BFAR. 2019.

[18] Nieves, P.M., Mendoza, A.B., Bradecina, R.G., Nolial, J.C., Celestial, N., Kubota, S., Canon, K.L. (under submission). The Eel Fishery in Tributaries Along Lagonoy Gulf: Implications for Management and Conservation [J]. Paper submitted to the BU R&D Journal.

[19] Han, YS. personal communication.

[20] Aoyama, J., Watanabe, S., Nishida, M., Tsukamoto, K. Discrimination of catadromous eels of genus Anguilla using Polymerase Chain Reaction-Restriction Fragment Length Polymorphism Analysis of the Mitochondrial 16S Ribosomal RNA Domain [J]. Transactions of the American Fisheries Society, 2000, 129(3):873-878. DOI: 10.1577/1548-8659(2000)1292.3.CO;2.

[21] Lin, Y-S., Poh, Y-P., Lin, S-M., Tzeng, C-S. Molecular Techniques to Identify Freshwater Eels: RFLP Analyses of PCR-amplified DNA Fragments and Allele-specific PCR from Mitochondrial DNA [J]. Zoological Studies, 2002, 41(4):421- 430.

[22] Watanabe S: Taxonomy of the freshwater eels, genus Anguilla Schrank, 1798 [M]. In Eel biology. Edited by: Aida K, Tsukamoto K, Yamauchi K. Springer, Tokyo; 2003, 3-18.

[23] Watanabe, S., Aoyama, J., Nishida, M., Tsukamoto, K. A Molecular Genetic Evaluation of the Taxonomy of Eels of the Genus Anguilla (Pisces: Anguilliformes) [J]. Bulletin of Marine Science, 2005, 76(3):675-690.

[24] Aoyama, J., Nishida, M., Tsukamoto, K. Molecular phylogeny and evolution of the freshwater eel, genus Anguilla[J]. Molecular Phylogenetics Evolution, 2001, 20(3):450-459. DOI: 10.1006/mpev.2001.0959.

[25] Minegishi, Y., Aoyama, J., Inoue, J.G., Miya, M., Nishida, M., Tsukamoto, K. Molecular phylogeny and evolution of the freshwater eels genus Anguilla based on the whole mitochondrial genome sequences [J]. Molecular Phylogenetics Evolution, 2005, 34(1):134-46. DOI: 10.1016/j.ympev.2004.09.003.

[26] Kumar, S., Stecher, G., Li, M., Knyaz, C., Tamura K. MEGA X: Molecular Evolutionary Genetics Analysis across computing platforms [J]. Molecular Biology and Evolution, 2018, 5(6):1547-1549. DOI: 10.1093/molbev/msy096.

[27] Excoffier, L. and Lischer, H.E. L. Arlequin suite ver 3.5: A new series of programs to perform population genetics analyses under Linux and Windows [J]. Molecular Ecology Resources, 2010, 10(3):564-7. DOI: 10.1111/j.1755-0998.2010.02847.x.

[28] Leander, N. J., Shen, K. N., Chen, R. T., Tzeng, W. N. Species composition and seasonal occurrence of recruiting glass eels (Anguilla spp.) in the Hsiukuluan River, Eastern Taiwan [J]. Zoological Studies, 2012, 51(1):59-71.

[29] Han, Y-S., Hung, C-L, Liao, Y-F, Tzeng, W-N. Population genetic structure of the Japanese eel Anguilla japonica: panmixia at spatial and temporal scales [J]. Marine Ecology Progress Series, 2010, 401:221-232, DOI: 10.3354/meps08422.


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