Northward dispersal of sea kraits (Laticauda semifasciata) beyond their typical range

Park, Jaejin; Kim, Il-Hun; Fong, Jonathan J.; Koo, Kyo-Soung; Choi, Woo-Jin; Tsai, Tein-Shun; Park, Daesik

doi:10.1371/journal.pone.0179871

Cited by 14 publications

(6 citation statements)

References 35 publications

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“…Furthermore, the occurrences and observations of L. semifasciata in Korea have been increasing. Park et al [ 10 ] analyzed the haplotype network using partial sequences of mitochondrial cytochrome b (Cytb) genes extracted from 12 L. semifasciata caught in Korean waters, and confirmed the northward dispersal of the species. However, the parasites of the sea snakes in Korean waters have not been investigated until the present study.…”

Section: Discussionmentioning

confidence: 98%

“…Recent reports indicate these out-of habitat findings have occurred on the mainland of Japan, the Russian Far East, and California, USA [8,9,15]. This phenomenon is believed to be the effect of global warming, and the increasing appearances of sea snakes in Korean waters are also thought to be due to the same reason [10]. Laticauda semifasciata is one of 2 sea snake species that was recently discovered in Korean waters [6,14].…”

Section: Discussionmentioning

confidence: 99%

“…In the past, Chinese sea snake has been known to inhabit the tropical and subtropical regions of China, Japan, Philippines, and Taiwan [ 7 ]. However, recent studies have shown that the snakes are increasingly found outside their original habitats to the north, including the Republic of Korea (Korea), Russia, and the mainland of Japan [ 6 , 8 – 10 ].…”

Section: Introductionmentioning

confidence: 99%

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Descriptions of Two Digenean Trematodes Found from a Chinese Sea Snake, Laticauda semifasciata, in Republic of Korea

Choe

Kim

et al. 2020

Korean J Parasitol

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We intended to describe 2 digenean trematodes found from a Chinese sea snake, Laticauda semifasciata, as the new fauna in the Republic of Korea. The snake was caught offshore of Aewol-eup, Jeju-do, in August 2017. Two species of fluke were found in the lung and intestinal tract of the snake in the process of necropsy. They were identified as Pulmovermis cyanovitellosus Coil and Kuntz, 1960 and Harmotrema laticaudae Yamaguti, 1933, respectively based on the morphological characters. Pulmovermis cyanovitellosus showed elongated body with well-developed and elongated male genital system and compact vitelline. And H. laticaudae was characterized by linguiform body with heavily armed cirrus with excretory system. This is the first time both species have been reported and described off the Korean coast. We provide morphological descriptions with some comments on their biology and geographical distribution. In addition, the taxonomic validity of the genus Hydrophitrema Sandars, 1960 was discussed, in terms of morphological descriptions and host ranges. This study provides novel insight into digenean fluke species existing off the coast of Korea.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Descriptions of Two Digenean Trematodes Found from a Chinese Sea Snake, Laticauda semifasciata, in Republic of Korea

Choe

Kim

et al. 2020

Korean J Parasitol

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“…Both natural and artificial dispersals could have contributed to this pattern. Natural dispersal could have been facilitated by land connections among the countries during prehistoric glacial periods via three potential routes (via the Ryukyu Islands, around the Yellow Sea or rafting across the East China Sea, Kim et al 2007;Borzee et al 2017;Park et al 2017). Artificial dispersal could have been facilitated by the human shipping connections between cities in the Shandong Peninsula and east coasts of China and cities in Japan and Korea (Fogel 2000;Mitsuhashi et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Patterns of morphological variation in the Schlegel’s Japanese gecko (Gekko japonicus) across populations in China, Japan, and Korea

et al. 2019

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Background: Studies of morphological variation within and among populations provide an opportunity to understand local adaptation and potential patterns of gene flow. To study the evolutionary divergence patterns of Schlegel's Japanese gecko (Gekko japonicus) across its distribution, we analyzed data for 15 morphological characters of 324 individuals across 11 populations (2 in China, 4 in Japan, and 5 in Korea). Results: Among-population morphological variation was smaller than within-population variation, which was primarily explained by variation in axilla-groin length, number of infralabials, number of scansors on toe IV, and head-related variables such as head height and width. The population discrimination power was 32.4% and in cluster analysis, populations from the three countries tended to intermix in two major groups. Conclusion: Our results indicate that morphological differentiation among the studied populations is scarce, suggesting short history for some populations after their establishment, frequent migration of individuals among the populations, and/or local morphological differentiation in similar urban habitats. Nevertheless, we detected interesting phenetic patterns that may predict consistent linkage of particular populations that are independent of national borders. Additional sampling across the range and inclusion of genetic data could give further clue for the historical relationship among Chinese, Japanese, and Korean populations of G. japonicus.

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“…Multiple factors influence sea krait distributions: precipitation; ocean and land surface temperatures; salinity; the presence/absence of coral reefs and mangrove forests; the distance from shoreline; and water depth (Brischoux et al, 2009; Brischoux et al, 2012; Brischoux et al, 2013; Heatwole, 1999; Heatwole et al, 2005; Heatwole et al, 2012; Heatwole et al, 2017; Park et al, 2017). The potential distributions of sea kraits were estimated for both marine and terrestrial (shoreline) environments using maximum entropy algorithm Maxent 3.3.3k (Phillips et al, 2004), sea krait species’ occurrences, and environmental characteristics known to influence sea krait distributions (for details, see Gherghel et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

Refining model estimates of potential species’ distributions to relevant accessible areas

Gherghel

Brischoux

Papeş

2019

Progress in Physical Geography: Earth and Environment

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Dispersal is an important, yet overlooked phenomenon when studying species’ distributions using ecological niche models (ENMs). Here, we use species’ dispersal limits to evaluate and refine ENM estimates only to the areas accessible to the species within the study region and, thereby, enhance the model interpretations. First, we ran multiple ENMs to estimate the distribution of sea krait species in both marine and terrestrial environments. Second, we estimated dispersal of the sea kraits using a cost analysis approach. Finally, we outline a new approach that combines dispersal models and ENMs with the purpose of estimating the accessible range when projecting species’ distribution estimates outside the known species range. We found that only a small proportion of the area the ENMs were projected over was accessible to sea kraits. The majority of the suitable areas for sea kraits are within the accessible area. Outside the accessible area, there is only a very limited suitable area for sea kraits. Our results suggest that when dispersal is taken into account, sea kraits seem to occupy most of their suitable available niche and that they may be unable to colonize much of the area outside of their dispersal ranges. Using dispersal estimates to refine species’ distribution predictions is a useful tool for refining the area of focus when ENM results are interpreted. Estimating species’ dispersal also helps evaluate the ability of the models to predict the species’ distributions in areas that are not accessible to the species and, hence, the potential commission error represented by overprediction.

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Northward dispersal of sea kraits (Laticauda semifasciata) beyond their typical range

Cited by 14 publications

References 35 publications

Descriptions of Two Digenean Trematodes Found from a Chinese Sea Snake, Laticauda semifasciata, in Republic of Korea

Descriptions of Two Digenean Trematodes Found from a Chinese Sea Snake, Laticauda semifasciata, in Republic of Korea

Patterns of morphological variation in the Schlegel’s Japanese gecko (Gekko japonicus) across populations in China, Japan, and Korea

Refining model estimates of potential species’ distributions to relevant accessible areas

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