Molecular and Morphological Analyses Suggest Cryptic Diversity of Eel Gobies, Genus Taenioides (Gobiidae), in Coastal Waters of China

Yao, Ch.; Chen, J.; Zhu, Kehua; Fang, Jiaqi; Liu, L.; Lü, Zh.

doi:10.1134/s0032945222060315

Cited by 2 publications

(6 citation statements)

References 16 publications

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“…The eel goby, Taenioides sp., is a newly confirmed candidate species of the genus Taenioides (Gobiidae, Amblyopinae) which is frequently mistaken as a form of Taenioides cirratus (Yao et al 2022). It is a small temperate fish initially known to be widely distributed in Chinese coastal waters from the Yangtze River to the Nandu River.…”

Section: Introductionmentioning

confidence: 99%

“…It is a small temperate fish initially known to be widely distributed in Chinese coastal waters from the Yangtze River to the Nandu River. It inhabits muddy bottoms in brackish waters areas, such as estuaries, mangrove swamps, and inner bays (Murdy and Randall 2002;Yao et al 2022). However, massive propagates of Taenioides sp.…”

Section: Introductionmentioning

confidence: 99%

“…is considered a severe threat to local benthic organisms, and it may cause damage to the ecological environment (Liang et al 2020). Although substantial work on this invasive species' morphological, behavioral, and physiological characteristics has been described and recorded (Liang et al 2020;Yao et al 2022), the sources and mechanisms of the Taenioides sp. invasions have never been studied.…”

Section: Introductionmentioning

confidence: 99%

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Population structure of Taenioides sp. (Gobiiformes, Gobiidae) reveals their invasion history to inland waters of China based on mitochondrial DNA control region

Sun,

Lü,

Fang

et al. 2024

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Taenioides sp. is a small temperate fish originally known to inhabit muddy bottoms of brackish waters in coastal areas of China. However, it began to invade multiple inland freshwaters and caused severe damage to Chinese aquatic ecosystems in recent years. To investigate the sources and invasive history of this species, we examined the population structure of 141 individuals collected from seven locations based on partial mitochondrial D-loop regions. The results revealed that the genetic diversity gradually decreased from south to north, with the Yangtze River Estuary and Taihu Lake populations possessing the highest haplotype diversity (Hd), average number of differences (k), and nucleotide diversity (π) values, suggesting that they may be the sources of Taenioides sp. invasions. Isolation-by-distance analysis revealed a non-significant correlation (p = 0.166) between genetic and geographic distances among seven populations, indicating that dispersal mediated through the regional hydraulic projects may have played an essential role in Taenioides sp. invasions. The population genetic structure analysis revealed two diverged clades among seven populations, with clade 2 only detected in source populations, suggesting a possible difference in the invasion ability of the two clades. Our results provide insights into how native estuary fish become invasive through hydraulic projects and may provide critical information for the future control of this invasive species.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Population structure of Taenioides sp. (Gobiiformes, Gobiidae) reveals their invasion history to inland waters of China based on mitochondrial DNA control region

Sun,

Lü,

Fang

et al. 2024

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“…The burrows can usually reach to a maximum depth of ~1 m [ 11 ]. To better cope with the challenges of deep burrowing environments, Amblyopinae have evolved many morphological and physiological innovations which include small vestigial eyes covered with skin [ 10 , 12 ] that show their adaptations to turbid waters [ 9 ], richly vascularized inner epithelia in the buccal-opercular cavity that enable direct air breathing to cope with the hypoxia in their poorly oxygenated burrows [ 11 , 13 ], and improved starvation resistance that ensures survival during long period of embedment in burrows at the time of low tide or cold seasons [ 11 ]. However, the genetic basis of such morphological and physiological adaptations in Amblyopinae has remained largely unknown, to date.…”

Section: Introductionmentioning

confidence: 99%

“…Genome sequencing and comparative genomics is a powerful tool for exploring the evolutionary history and mechanisms of a non-model taxon with complex adaptive traits, such as Amblyopinae. In the present study, we assembled the first genomes of Amblyopinae species, Taenioides sp., widely distributed in coastal waters of China [ 12 ]. Combined with phylogenomics and comparative genomics, we tried to elucidate the genetic mechanism underlying the morphological and physiological innovations that facilitate the adaptations to deep-burrowing lifestyle in Amblyopinae.…”

Section: Introductionmentioning

confidence: 99%

Genome Sequencing Provides Novel Insights into Mudflat Burrowing Adaptations in Eel Goby Taenioides sp. (Teleost: Amblyopinae)

Liu,

Wang

et al. 2023

IJMS

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Amblyopinae is one of the lineage of bony fish that preserves amphibious traits living in tidal mudflat habitats. In contrast to other active amphibious fish, Amblyopinae species adopt a seemly more passive lifestyle by living in deep burrows of mudflat to circumvent the typical negative effects associated with terrestriality. However, little is known about the genetic origin of these mudflat deep-burrowing adaptations in Amblyopinae. Here we sequenced the first genome of Amblyopinae species, Taenioides sp., to elucidate their mudflat deep-burrowing adaptations. Our results revealed an assembled genome size of 774.06 Mb with 23 pseudochromosomes anchored, which predicted 22,399 protein-coding genes. Phylogenetic analyses indicated that Taenioides sp. diverged from the active amphibious fish of mudskipper approximately 28.3 Ma ago. In addition, 185 and 977 putative gene families were identified to be under expansion, contraction and 172 genes were undergone positive selection in Taenioides sp., respectively. Enrichment categories of top candidate genes under significant expansion and selection were mainly associated with hematopoiesis or angiogenesis, DNA repairs and the immune response, possibly suggesting their involvement in the adaptation to the hypoxia and diverse pathogens typically observed in mudflat burrowing environments. Some carbohydrate/lipid metabolism, and insulin signaling genes were also remarkably alterated, illustrating physiological remolding associated with nutrient-limited subterranean environments. Interestingly, several genes related to visual perception (e.g., crystallins) have undergone apparent gene losses, pointing to their role in the small vestigial eyes development in Taenioides sp. Our work provide valuable resources for understanding the molecular mechanisms underlying mudflat deep-burrowing adaptations in Amblyopinae, as well as in other tidal burrowing teleosts.

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Molecular and Morphological Analyses Suggest Cryptic Diversity of Eel Gobies, Genus Taenioides (Gobiidae), in Coastal Waters of China

Cited by 2 publications

References 16 publications

Population structure of Taenioides sp. (Gobiiformes, Gobiidae) reveals their invasion history to inland waters of China based on mitochondrial DNA control region

Population structure of Taenioides sp. (Gobiiformes, Gobiidae) reveals their invasion history to inland waters of China based on mitochondrial DNA control region

Genome Sequencing Provides Novel Insights into Mudflat Burrowing Adaptations in Eel Goby Taenioides sp. (Teleost: Amblyopinae)

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