Stable isotope on hilsa shad (Tenualosa ilisha) otoliths revealed migratory behavior of a population found in Hooghly River, West Bengal, India

Rajawat, Veerendra Singh; Nazir, Aafaq; Banerjee, Yogaraj; Nath, Ashim Kumar; Sakthivel, Thamizharasan

doi:10.1007/s10641-022-01215-x

Cited by 9 publications

(2 citation statements)

References 33 publications

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“…The discovery of them in Vietnamese Giang Thanh River suggests a broader migratory pattern or habitat adaptation within the Indo-Pacific region. The T. ilisha is an indigenous anadromous fish in the Indo-Pacific (Brierley and Kingsford, 2009; Hossain et al ., 2019a), inhabiting the coasts, estuaries and rivers of southern Asia countries (Sahoo et al ., 2018; Ghosh et al ., 2022). Its habitat preferences include extensive continental shelves (Hossain et al ., 2016; Dwivedi, 2019), monsoonal influences, significant precipitation and runoff (Naskar et al ., 2017; Leal Filho et al ., 2022), surface temperatures of 20–30°C (Kundu et al ., 2020), seasonally shifting currents (Hossain et al ., 2019b), moderate organic productivity (Sarker et al ., 2016) and coastal waters with lower salinity (Mohindra et al ., 2023).…”

Section: Discussionmentioning

confidence: 99%

Confirmation of hilsa shad (Tenualosa ilisha) in Vietnamese waters: a morphological and genetic analysis

Giap,

Rahman,

2024

J. Mar. Biol. Ass.

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One specimen of tropical shad was caught from the Giang Thanh River, Kien Giang province, Vietnam in a survey on 16 October 2022. We identified the specimen as the hilsa shad, Tenualosa ilisha Hamilton, 1822 using morphological analysis, and further validated by its cytochrome oxidase subunit I (COI) sequence. The specimen was 418 mm long, 1428 g in weight, with a head length of 29.0% and pectoral fin length of 31.1% of its standard length. Notably, the presence of 34 scutes, a higher gill raker count and a caudal fin length within the moderate range for Tenualosa species distinguished it from T. macrura, T. toli and T. reevesii. The COI sequence of the sample matched closely to the T. ilisha. The results confirm that T. ilisha still endures Vietnamese water, where it was thought to be extinct. Climate change and Indo-Pacific Ocean currents may introduce expansion of distribution area of the T. ilisha. Further studies on distribution of the T. ilisha and other Tenualosa species and their dynamics are needed.

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Section: Discussionmentioning

confidence: 99%

Confirmation of hilsa shad (Tenualosa ilisha) in Vietnamese waters: a morphological and genetic analysis

Giap,

Rahman,

2024

J. Mar. Biol. Ass.

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“…Using stable isotope, compositions are being utilized to study the migratory behaviour of fish populations by several researchers (Ghosh et al, 2022; Redding et al, 2020; Sheehan et al, 2022; Trueman et al, 2012). In summary, this study quantified the movement of the Rutilus kutum community on the southern coasts of the Caspian Sea, while movement varied between sites, it was not limited to species that move to reproduce.…”

Section: Discussionmentioning

confidence: 99%

Tracking the migration and distribution of Caspian Kutum (Rutilus kutum, Kamenskii, 1901) along the southern coastline of the Caspian Sea based on stable isotope analysis

Abbasi,

Ghorbani,

Salmanmahiny

et al. 2024

Aquatic Conservation

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Animal movements and resource utilization are essential factors for effective environmental management, but they are difficult to quantify in extensive natural ecosystems such as the aquatic environment. Stable isotope analysis is an ecological tracer technique that reveals information about links between trophic levels, movement patterns of migratory species or geographical variations due to the different aquatic processes that influence them. The Caspian kutum is an important commercial endemic species on the southern coasts of the Caspian Sea and can be used as a proxy to gain information on how different spatiotemporal, environmental and biological—variables can influence ecological tracers such as stable isotopes at the sea basin level. Thus, the main objective of this study is to investigate how spatiotemporal, isotopic baseline and environmental factors influence the distribution of stable isotopes in the Caspian kutum. The results showed that although there are individual variations, there is an overall increasing trend in δ13C and a decreasing trend in δ15N from the western to the eastern regions. In addition, there is a decreasing trend in δ13C and an increasing trend in δ15N with increasing age. It seems that among other migration routes of this species from the northern part of the southern Caspian Sea to the southern coasts, one of the main migration routes of this fish on the coasts of Iran is west‐east mobility, which may affect the efficiency of sustainable management of the catch in various fishing areas. This was the first study to establish a migratory pattern of the Caspian kutum based on stable isotopes. We advocate the wider stable isotopes to effectively investigate fish migratory, as the results from this study provided important contributions to the development of valuable insights for the management and sustainability for this threatened and declining species fish populations.

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A review of molecular, physiological, behavioral, and ecological studies in a Special Issue devoted to the movement ecology of fishes

et al. 2022

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Stable isotope on hilsa shad (Tenualosa ilisha) otoliths revealed migratory behavior of a population found in Hooghly River, West Bengal, India

Cited by 9 publications

References 33 publications

Confirmation of hilsa shad (Tenualosa ilisha) in Vietnamese waters: a morphological and genetic analysis

Confirmation of hilsa shad (Tenualosa ilisha) in Vietnamese waters: a morphological and genetic analysis

Tracking the migration and distribution of Caspian Kutum (Rutilus kutum, Kamenskii, 1901) along the southern coastline of the Caspian Sea based on stable isotope analysis

A review of molecular, physiological, behavioral, and ecological studies in a Special Issue devoted to the movement ecology of fishes

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