Pelagic larval duration, growth rate, and population genetic structure of the tidepool snake moray Uropterygius micropterus around the southern Ryukyu Islands, Taiwan, and the central Philippines
| Autor: | Atsushi Tawa, Te-Yu Liao, Jen-Chieh Shiao, Wen-Chien Huang, Jui-Tsung Chang, Yoshiyuki Iizuka, Chun Liao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Population lcsh:Medicine Population genetics Zoology Marine Biology 010603 evolutionary biology 01 natural sciences General Biochemistry Genetics and Molecular Biology Gene flow medicine Population genetic structure education Muraenidae Otolith microstructure Uropterygius micropterus Otolith education.field_of_study Pelagic larval duration biology Population Biology 010604 marine biology & hydrobiology General Neuroscience lcsh:R Pelagic zone General Medicine biology.organism_classification medicine.anatomical_structure Leptocephalus (genus) Genetic structure Aquaculture Fisheries and Fish Science General Agricultural and Biological Sciences |
| Zdroj: | PeerJ PeerJ, Vol 6, p e4741 (2018) |
| ISSN: | 2167-8359 |
| Popis: | The relationships between pelagic larval duration (PLD) and geographic distribution patterns or population genetic structures of fishes remain obscure and highly variable among species. To further understand the early life history of the tidepool snake morayUropterygius micropterusand the potential relationship between PLD and population genetic structure of this species, otolith microstructure and population genetics based on concatenated mtDNA sequence (cytochromeband cytochrome oxidase subunit I, 1,336 bp) were analyzed for 195 specimens collected from eight locations around the southern Ryukyu Islands, Taiwan, and the central Philippines. Eels with longer PLD and lower otolith growth rates were observed at relatively higher latitudes with lower water temperatures (54.6 ± 7.7 days and 1.28 ± 0.16 µm day−1on Ishigaki Island, Japan, vs. 43.9 ± 4.9 days and 1.60 ± 0.19 µm day−1on Badian, the Philippines), suggesting that leptocephali grew faster and had shortened pelagic periods in warmer waters. Meanwhile, the eels along the southwest coast of Taiwan had relatively longer PLD (57.9 ± 10.5 days), which might be associated with the more complex ocean current systems compared to their counterparts collected along the east coast of Taiwan (52.6 ± 8.0 days). However, the southwestern and eastern Taiwan groups had similar otolith growth rates (1.33 ± 0.19 µm day−1vs. 1.36 ± 0.16 µm day−1). Despite the intergroup variation in PLD, genetic analysis revealed fluent gene flow among the tidepool snake morays in the study regions, implying that intraspecies PLD variation had a weak effect on genetic structure. The leptocephalus stage might have ensured the widespread gene flow among the study areas and leptocephalus growth was likely influenced by regional water temperature. |
| Databáze: | OpenAIRE |
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