Abstract
The spawning area of the common Japanese conger, Conger myriaster, had remained unknown because spawning adults or its newly hatched larvae were never collected. Using genetic identification, we determined that C. myriaster spawns far offshore in the western North Pacific, just west of the spawning area of the Japanese eel, Anguilla japonica. In June 2008, six newly hatched C. myriaster larvae, 5.6–6.9 mm, were collected at the eastern edge of where many small unidentified Conger leptocephali (7–20 mm) were collected previously. The offshore spawning location of C. myriaster is analogous to that of the American conger eel, Conger oceanicus, and the American eel, Anguilla rostrata, in the Sargasso Sea, suggesting that convergent evolution of large-scale reproductive migration strategies in both anguillid and conger eels has occurred in the north Atlantic and Pacific subtropical gyres. The realization that two anguillids, A. rostrata and A. japonica, and two congers, C. oceanicus and C. myriaster, have evolved almost identical migration strategies in widely separated ocean basins suggests that natural selection for larval survival and recruitment success has resulted in long offshore spawning migrations in two phylogenetically distant taxa of anguilliform eels.
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References
Aoyama J (2009) Life history and evolution of migration in catadromous eels (genus Anguilla). Aqua BioSci Monogr 2(1):1–42
Aoyama J, Wouthuyzen S, Miller MJ, Inagaki T, Tsukamoto K (2003) Short-distance spawning migration of tropical freshwater eels. Biol Bull 204:104–108
Horie N, Utoh T, Yamada Y, Okamura A, Zhang H, Mikawa N, Akazawa A, Tanaka S, Oka H (2002) Development of embryos and larvae in the common Japanese conger Conger myriaster. Fish Sci 68:972–983
Inoue JG, Miya M, Tsukamoto K, Nishida M (2001) Complete mitochondrial DNA sequence of Conger myriaster (Teleostei: Anguilliformes): novel gene order for vertebrate mitochondrial genomes and the phylogenetic implications for anguilliform families. J Mol Evol 52:311–320
Inoue JG, Miya M, Venkatesh B, Nishida M (2005) The mitochondrial genome of Indonesian coelacanth Latimeria menadoensis (Sarcopterygii: Coelacanthiformes) and divergence time estimation between the two coelacanths. Gene 349:227–235
Inoue JG, Miya M, Miller MJ, Sado T, Hanel R, López JA, Hatooka K, Aoyama J, Minegishi Y, Nishida M, Tsukamoto K (2010) Deep-ocean origin of the freshwater eels. Biol Lett 6:363–366
Katayama S, Ishida T, Shimizu Y, Yamanobe A (2004) Seasonal change in distribution of Conger eel Conger myriaster off the Pacific coast south of Tohoku, north-eastern Japan. Fish Sci 70:1–6
Kimura S, Tsukamoto K (2006) The salinity front in the North Equatorial current: a landmark for the spawning migration of the Japanese eel (Anguilla japonica) related to the stock recruitment. Deep Sea Res II 53:315–325
Kimura Y, Ishikawa S, Tokai T, Nishida M, Tsukamoto K (2004) Early life history characteristics and genetic homogeneity of Conger myriaster leptocephali along the east coast of central Japan. Fish Res 70:61–69
Kurogi H, Mochioka N, Takai Y, Tabeta O (2002) First offshore record of Conger myriaster leptocephali in the East China Sea. Fish Sci 68:1155–1157
Kuroki M, Aoyama J, Miller MJ, Yoshinaga T, Shinoda S, Hagihara S, Tsukamoto K (2009) Sympatric spawning of Anguilla marmorata and Anguilla japonica in the western North Pacific Ocean. J Fish Biol 74:1853–1865
Lee TW, Byun JS (1996) Microstructural growth in otoliths of conger eel (Conger myriaster) leptocephali during the metamorphic stage. Mar Biol 125:259–268
Ma T, Miller MJ, Aoyama J, Tsukamoto K (2007) Genetic identification of Conger myriaster leptocephali in the East China Sea region. Fish Sci 73:989–994
McCleave JD, Miller MJ (1994) Spawning of Conger oceanicus and Conger triporiceps (Congridae) in the Sargasso Sea and subsequent distribution of leptocephali. Environ Biol Fish 39:339–355
McCleave JD, Kleckner RC, Castonguay M (1987) Reproductive sympatry of American and European eels and implications for migration and taxonomy. Am Fish Soc Symp 1:286–297
Miller MJ (2002) Distribution and ecology of Ariosoma balearicum (Congridae) leptocephali in the western North Atlantic. Environ Biol Fish 63:235–252
Miller MJ (2009) Ecology of anguilliform leptocephali: remarkable transparent fish larvae of the ocean surface layer. Aqua BioSci Monogr 2(4):1–94
Miller MJ, Tsukamoto K (2004) An introduction to leptocephali: biology and identification. Ocean Research Institute, University of Tokyo, Tokyo
Miller MJ, Otake T, Minagawa G, Inagaki T, Tsukamoto K (2002) Distribution of leptocephali in the Kuroshio current and East China Sea. Mar Ecol Prog Ser 235:279–288
Minegishi Y, Aoyama J, Inoue JG, Miya M, Nishida M, Tsukamoto K (2005) Molecular phylogeny and evolution of the freshwater eels genus Anguilla based on the whole mitochondrial genome sequences. Mol Phylogenet Evol 34:134–146
Minegishi Y, Aoyama J, Tsukamoto K (2008) Multiple population structure of the giant mottled eel, Anguilla marmorata. Mol Ecol 17:3109–3122
Nelson JS (2006) Fishes of the world, 4th edn. Wiley, Hoboken
Riemann L, Alfredsson H, Hansen MM, Als TD, Nielsen TG, Munk P, Aarestrup K, Maes GE, Sparholt H, Petersen MI, Bachler M, Castonguay M (2010) Qualitative assessment of the diet of European eel larvae in the Sargasso Sea resolved by DNA barcoding. Biol Lett 6:819–822
Schmidt J (1922) The breeding places of the eel. Phil Trans R Soc Lond 211:179–208
Schmidt J (1931) Eels and conger eels of the North Atlantic. Nature 128:602–604
Tokimura M (2001) Conger-eel fisheries and fisheries resources in the East China Sea. Nippon Suisan Gakkaishi 67:125–126 (in Japanese)
Tsukamoto K (1992) Discovery of the spawning area for the Japanese eel. Nature 356:789–791
Tsukamoto K, Aoyama J, Miller MJ (2002) Migration, speciation and the evolution of diadromy in anguillid eels. Can J Fish Aquat Sci 59:1989–1998
Tsukamoto K, Chow S, Otake T, Kurogi H, Mochioka N, Miller MJ, Aoyama J, Kimura S, Watanabe S, Yoshinaga T, Shinoda A, Kuroki M, Oya M, Watanabe T, Hata K, Ijiri S, Kazeto Y, Nomura K, Tanaka H (2011) Oceanic spawning ecology of freshwater eels in the western North Pacific. Nat Commun 2:179. doi:10.1038/ncomms1174
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Communicated by: Sven Thatje
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Miller, M.J., Yoshinaga, T., Aoyama, J. et al. Offshore spawning of Conger myriaster in the western North Pacific: evidence for convergent migration strategies of anguilliform eels in the Atlantic and Pacific. Naturwissenschaften 98, 537–543 (2011). https://doi.org/10.1007/s00114-011-0787-y
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DOI: https://doi.org/10.1007/s00114-011-0787-y