Inshore migration of a tropical eel, Anguilla marmorata, from Taiwanese and Japanese coasts

Arai, Takaomi; Marui, Miho; Otake, Tsuguo; Tsukamoto, Katsumi

doi:10.1046/j.1444-2906.2002.00401.x

Cited by 19 publications

(13 citation statements)

References 30 publications

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“…The early life history parameters of A. marmorata were almost the same in the Pacific region, with the average durations of the leptocephalus stage ranging between 110 days (Philippines) to 128 days (Indonesia) and the ages at recruitment ranging from 145 days (Japan, Philippines and Taiwan) to 155 days (Indonesia) [ 20 , 21 , 24 , 45 , 46 ]. These parameters are slightly higher than those of A. marmorata recruited to the southwestern Indian Ocean with the average duration of the leptocephalus stage of 97–105 days and the age at recruitment of 120–128 days [ 23 , 47 ].…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the occurrence of sub-populations in the Indian Ocean might be possible. Information on the life history of A. bengalensis bengalensis [ 19 , 38 , 54 , 55 ] is scarce compared with those of A. marmorata [ 14 , 20 , 21 , 23 , 24 , 25 , 44 , 45 , 46 , 47 , 56 , 57 ] and A. bicolor bicolor [ 19 , 20 , 21 , 22 , 38 , 47 , 54 , 55 , 58 , 59 , 60 ], and only a few leptocephali have been collected from off Sumatra Island and in the eastern Indian Ocean [ 37 , 61 ]. Therefore, further intensive studies on the spawning site, life history and molecular genetic analyses are needed to understand the transportation and dispersion mechanisms of this eel.…”

Section: Discussionmentioning

confidence: 99%

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Contrasting patterns of genetic population structure in tropical freshwater eels of genus Anguilla in the Indo-Pacific

Arai

Taha

2021

Heliyon

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Freshwater eels, genus Anguilla, have a distinctive catadromous life history, which could be associated with certain oceanic current systems and offshore spawning sites. Thus, migration and dispersion patterns are believed to be important factors influencing the population structure of each species. Temperate eel species are well studied, while little research has been conducted on the tropical counterparts that comprise two-thirds of all eel species. The population structure of three tropical species, A. marmorata, A. bicolor bicolor and A. bengalensis bengalensis, which are distributed widely in the Indo-Pacific region, were explored by means of DNA sequence analysis of mitochondrial cytochrome c oxidase subunit I (COI). This study suggests that A. bicolor bicolor might have two genetically distinct populations (fixation index, F ST ¼ 0.891; p < 0.001) that co-occur geographically in the Indo-Pacific region, while A. marmorata and A. bengalensis bengalensis might have a panmictic-population structure in this region. This study is the first to explore the population genetic structure of A. bengalensis bengalensis. The present results also suggest plausible dispersion and migration of these tropical species into their continental habitats.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Contrasting patterns of genetic population structure in tropical freshwater eels of genus Anguilla in the Indo-Pacific

Arai

Taha

2021

Heliyon

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“…A. marmorata and A. japonica have overlapping spawning sites and comparable larval durations [3] , [12] , [22] . In theory, glass eels of these species should be transported by the Kuroshio and its branch waters to similar habitats in East Asia.…”

Section: Discussionmentioning

confidence: 99%

“…The leptocephali rely on these oceanic currents for transportation before metamorphosing into glass eels [5], [11], [21]. A. japonica and A. marmorata metamorphose at similar ages: at around 3–5 months of age [3], [22]–[24]. The overlapping spawning areas, transportation routes, and leptocephalus durations between A. marmorata and A. japonica suggest that both should be dispersed in similar geographic areas.…”

Section: Introductionmentioning

confidence: 99%

Sympatric Spawning but Allopatric Distribution of Anguilla japonica and Anguilla marmorata: Temperature- and Oceanic Current-Dependent Sieving

et al. 2012

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Anguilla japonica and Anguilla marmorata share overlapping spawning sites, similar drifting routes, and comparable larval durations. However, they exhibit allopatric geographical distributions in East Asia. To clarify this ecological discrepancy, glass eels from estuaries in Taiwan, the Philippines, Indonesia, and China were collected monthly, and the survival rate of A. marmorata under varying water salinities and temperatures was examined. The composition ratio of these 2 eel species showed a significant latitude cline, matching the 24°C sea surface temperature isotherm in winter. Both species had opposing temperature preferences for recruitment. A. marmorata prefer high water temperatures and die at low water temperatures. In contrast, A. japonica can endure low water temperatures, but their recruitment is inhibited by high water temperatures. Thus, A. japonica glass eels, which mainly spawn in summer, are preferably recruited to Taiwan, China, Korea, and Japan by the Kuroshio and its branch waters in winter. Meanwhile, A. marmorata glass eels, which spawn throughout the year, are mostly screened out in East Asia in areas with low-temperature coastal waters in winter. During summer, the strong northward currents from the South China Sea and Changjiang River discharge markedly block the Kuroshio invasion and thus restrict the approach of A. marmorata glass eels to the coasts of China and Korea. The differences in the preferences of the recruitment temperature for glass eels combined with the availability of oceanic currents shape the real geographic distribution of Anguilla japonica and Anguilla marmorata, making them “temperate” and “tropical” eels, respectively.

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“…The tropical Anguilla marmorata is very common in the Indo-Pacific Ocean with a more-extensive distribution than temperate freshwater eels [ 3 , 4 ]. Adults of this species attain a greater maximum size than most temperate species [ 5 ]. Unlike the Japanese eel, A. marmorata spawns year-round, based on hatching dates of elvers inferred from otoliths [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microsatellite Loci of Tropical and Temperate Anguilla Eels

Tseng

2012

IJMS

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Anguilla eels are divided into temperate and tropical eels, based on their major distributions. The present study collected two temperate eels, Anguilla japonica and Anguilla anguilla, and two tropical eels, Anguilla marmorata and Anguilla bicolor pacifica, to examine two questions: do temperate and tropical Anguilla eels have different genetic polymorphic patterns?; and do temperate Anguilla japonica and Anguilla anguilla have a closer relationship to each other than to tropical eels? In total, 274 sequences were cloned and sequenced from six conserved microsatellite loci to examine polymorphic patterns of these four catadromous eels. Different mutational events, including substitutions, and repeat-unit deletions and insertions, appeared in major regions, while different point mutations were observed in flanking regions. The results implied that parallel patterns of microsatellite sequences occurred within both tropical and temperate freshwater eels. Consensus flanking sequences of six homologous loci from each of the four species were constructed. Genetic distances ranged from 0.044 (Anguilla bicolor pacifica vs. Anguilla marmorata) to 0.061 (Anguilla marmorata vs. Anguilla anguilla). The tree topology suggests the hypothesis of Anguilla japonica and Anguilla anguilla being a sister group must be rejected.

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Inshore migration of a tropical eel, Anguilla marmorata, from Taiwanese and Japanese coasts

Cited by 19 publications

References 30 publications

Contrasting patterns of genetic population structure in tropical freshwater eels of genus Anguilla in the Indo-Pacific

Contrasting patterns of genetic population structure in tropical freshwater eels of genus Anguilla in the Indo-Pacific

Sympatric Spawning but Allopatric Distribution of Anguilla japonica and Anguilla marmorata: Temperature- and Oceanic Current-Dependent Sieving

Evolution of Microsatellite Loci of Tropical and Temperate Anguilla Eels

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