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The reproductive biology of Ellochelon vaigiensis from the Vietnamese Mekong Delta

Ecology and evolution, 2024-02, Vol.14 (2), p.e11033-n/a [Peer Reviewed Journal]

2024 The Authors. published by John Wiley & Sons Ltd. ;2024 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. ;2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2045-7758 ;EISSN: 2045-7758 ;DOI: 10.1002/ece3.11033 ;PMID: 38362163

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  • Title:
    The reproductive biology of Ellochelon vaigiensis from the Vietnamese Mekong Delta
  • Author: Dinh, Quang Minh ; Truong, Ngon Trong ; Nguyen, Ton Huu Duc ; Lam, Tran Thi Huyen ; Nguyen, Tien Thi Kieu ; Jaafar, Zeehan
  • Subjects: Aquaculture ; Aquatic habitats ; breeding season ; Commercial species ; Dinh, Truong ; Ecosystem biology ; Eggs ; Ellochelon vaigiensis ; Fecundity ; Females ; Fish ; Fisheries ; Fishing ; length at 50% maturity ; Males ; Nature Notes ; Reproductive behavior ; Rivers ; Salinity ; Seasonal variations ; squaretail mullet ; synchronous spawner ; Zoology
  • Is Part Of: Ecology and evolution, 2024-02, Vol.14 (2), p.e11033-n/a
  • Description: The Squaretail mullet, Ellochelon vaigiensis, is a commercial fish species distributed throughout the Indo‐Pacific region. This species tolerates wide variations in salinity, having been reported from both freshwater and marine habitats. Although economically significant, there is little information on its reproduction, especially in the Vietnamese Mekong Delta (VMD), where it is heavily extracted. Our study elucidates the breeding pattern, seasonality, first length at maturity, as well as potential and relative fecundity of this species. Fish specimens were collected by trawl nets from November 2020 to October 2021 at four estuarine sites within the VMD. We found this species to be a synchronous spawner, with peaks in reproductive activity from June to September. In the populations we surveyed, there was significant dominance of males (1.26:1.00) based on 942 fish samples (526 males and 416 females). The length at 50% maturity for females was significantly higher than for males at all sites and ranged from 10.6 to 19.3 cm. The diameter of the eggs examined for this species exhibited slight variation, from 0.43 to 0.54 mm. The potential fecundity ranged from 246,254 ± 35,878 to 411,970 ± 54,370 eggs, corresponding to female length and weight of 26.7–32.6 cm and 102.97–234.19 g, respectively. Relative fecundity values were highest at Thanh Phu, Ben Tre (6388 ± 605 eggs), and Dong Hai, Bac Lieu (6461 ± 637 eggs), followed by Tran De, Soc Trang (4729 ± 408), and were found to be lowest at Duyen Hai, Tra Vinh (3117 ± 223 eggs). Information on reproductive behavior in this species has far‐reaching impacts on sustainable extractions, stock conservation, and aquaculture. Ellochelon vaigiensis is a synchronous spawner, with peaks in reproductive activity from June to October. The length at 50% maturity for females is significantly higher than that for males at all sites and ranges from 10.6 to 19.3 cm. The diameter of the eggs examined for this species exhibited slight variation, from 0.43 to 0.54 mm. The potential fecundity ranged from 246,254 ± 35,878 to 411,970 ± 54,370 eggs, corresponding to female length and weight of 26.7–32.6 cm and 102.97–234.19 g, respectively. Relative fecundity values peaked at Thanh Phu, Ben Tre (6388 ± 605 eggs) and Dong Hai, Bac Lieu (6461 ± 637 eggs), followed by Tran De, Soc Trang (4729 ± 408), and were found to be lowest at Duyen Hai, Tra Vinh (3117 ± 223 eggs).
  • Publisher: England: John Wiley & Sons, Inc
  • Language: English
  • Identifier: ISSN: 2045-7758
    EISSN: 2045-7758
    DOI: 10.1002/ece3.11033
    PMID: 38362163
  • Source: GFMER Free Medical Journals
    PubMed Central
    Wiley Online Library Open Access
    ROAD: Directory of Open Access Scholarly Resources
    ProQuest Central
    DOAJ Directory of Open Access Journals
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