Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze River
The longjaw tapertail anchovy <i>Coilia nasus</i>, which migrates from ocean to freshwater for spawning in spring, is an important anadromous fish with ecological and cultural significance. To determine parasite infection in anadromous <i>C. nasus</i>, a total of 103 fish fro...
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MDPI AG
2024-03-01
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| author | Qingjie Zhou Lijun Wang Bingwen Xi Congping Ying Kai Liu |
| author_facet | Qingjie Zhou Lijun Wang Bingwen Xi Congping Ying Kai Liu |
| author_sort | Qingjie Zhou |
| collection | DOAJ |
| description | The longjaw tapertail anchovy <i>Coilia nasus</i>, which migrates from ocean to freshwater for spawning in spring, is an important anadromous fish with ecological and cultural significance. To determine parasite infection in anadromous <i>C. nasus</i>, a total of 103 fish from the Yangtze River were collected and examined in 2021 and 2022. The overall infection prevalence of nematodes in <i>C. nasus</i> was 100%, with a mean intensity of 13.81 ± 16.45. The mean intensity of nematode infections in 2022 was significantly higher than that observed in 2021 across all sampling sites (<i>p</i> < 0.05). Nematodes were widely detected in the mesentery, pyloric cecum, stomach, and liver, among which the mesentery accounted for the highest proportion, reaching up to 53.52%. A total of eight ascaridoid nematodes belonging to the family Anisakidae and Raphidascarididae were identified by using morphological characters and molecular biological techniques, including two species of <i>Anisakis</i>, five species of <i>Hysterothylacium</i>, and one species of <i>Raphidascaris</i>. <i>A. pegreffii</i> was found as the predominant species, accounting for 48.65% of all identified parasitic nematodes in liver, while <i>Raphidascaris</i> sp. was the most common nematode in the mesentery, pyloric cecum, and stomach, reaching up to 39.81%, 36.21%, and 74.36%, respectively. The present study systematically investigated the parasitic status and community structure of the nematode in <i>C. nasus</i> during its migration in the Yangtze River. This research provides a foundation for studying the impact of nematode parasitism on the reproductive migration and population recruitment of <i>C. nasus</i>, and offers valuable insights for biomarker screening and nematode identification in <i>C. nasus</i>. |
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| spelling | doaj.art-934061af45c5467396fd37ec7b5f2c302024-03-27T13:33:48ZengMDPI AGDiversity1424-28182024-03-0116316710.3390/d16030167Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze RiverQingjie Zhou0Lijun Wang1Bingwen Xi2Congping Ying3Kai Liu4Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, ChinaWuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, ChinaWuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, ChinaWuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, ChinaWuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, ChinaThe longjaw tapertail anchovy <i>Coilia nasus</i>, which migrates from ocean to freshwater for spawning in spring, is an important anadromous fish with ecological and cultural significance. To determine parasite infection in anadromous <i>C. nasus</i>, a total of 103 fish from the Yangtze River were collected and examined in 2021 and 2022. The overall infection prevalence of nematodes in <i>C. nasus</i> was 100%, with a mean intensity of 13.81 ± 16.45. The mean intensity of nematode infections in 2022 was significantly higher than that observed in 2021 across all sampling sites (<i>p</i> < 0.05). Nematodes were widely detected in the mesentery, pyloric cecum, stomach, and liver, among which the mesentery accounted for the highest proportion, reaching up to 53.52%. A total of eight ascaridoid nematodes belonging to the family Anisakidae and Raphidascarididae were identified by using morphological characters and molecular biological techniques, including two species of <i>Anisakis</i>, five species of <i>Hysterothylacium</i>, and one species of <i>Raphidascaris</i>. <i>A. pegreffii</i> was found as the predominant species, accounting for 48.65% of all identified parasitic nematodes in liver, while <i>Raphidascaris</i> sp. was the most common nematode in the mesentery, pyloric cecum, and stomach, reaching up to 39.81%, 36.21%, and 74.36%, respectively. The present study systematically investigated the parasitic status and community structure of the nematode in <i>C. nasus</i> during its migration in the Yangtze River. This research provides a foundation for studying the impact of nematode parasitism on the reproductive migration and population recruitment of <i>C. nasus</i>, and offers valuable insights for biomarker screening and nematode identification in <i>C. nasus</i>.https://www.mdpi.com/1424-2818/16/3/167<i>Coilia nasus</i>parasitenematode<i>Anisakis</i> |
| spellingShingle | Qingjie Zhou Lijun Wang Bingwen Xi Congping Ying Kai Liu Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze River Diversity <i>Coilia nasus</i> parasite nematode <i>Anisakis</i> |
| title | Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze River |
| title_full | Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze River |
| title_fullStr | Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze River |
| title_full_unstemmed | Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze River |
| title_short | Ascaridoid Nematodes Infection in Anadromous Fish <i>Coilia nasus</i> from Yangtze River |
| title_sort | ascaridoid nematodes infection in anadromous fish i coilia nasus i from yangtze river |
| topic | <i>Coilia nasus</i> parasite nematode <i>Anisakis</i> |
| url | https://www.mdpi.com/1424-2818/16/3/167 |
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