Determination of the growth performance and reproductive season of wild <i>Channa lucius</i> (Cuvier, 1831) populations of genus Channa (Channidae, Perciformes) in the Mekong Delta, Vietnam

Ly, Tien Hai; Huang, Chen‐Fen; Lee, Meng–Chou; Thanh, Vo Van; Diep, Doan X.

doi:10.1111/jfb.15330

Cited by 1 publication

(8 citation statements)

References 20 publications

(22 reference statements)

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“…Kwong et al (2014) said that thanks to their specialized physiological mechanisms in ionic regulation and acid-base balance in habitats, the fish can thrive in acidic water in the Rio Negro. This knowledge showed the great potential of C. lucius, a fish species often inhabiting freshwaters with low pH levels (around 5.5-6.0) (Lee and Ng, 1994;Ly, 2016), to become an important candidate species for aquaculture in acidic waters in the Mekong Delta. However, little work has been done to date on domesticating this species for aquaculture production.…”

Section: Introductionmentioning

confidence: 92%

“…The lowest pH value chosen in our study was based on the pH ranges where C. lucius commonly encounters wild reproduction or successful artificial reproduction in the Mekong Delta, Vietnam, around 5.5-6.0 (Ly, 2016). We investigated the effects of six different pH levels (5.5, 6.0, 6.5, 7.0, 7.5, and 8.0) at two early life stages of C. lucius.…”

Section: Experimental Designmentioning

confidence: 99%

“…In recent years, the natural stocks of C. lucius in Vietnam have been severely reduced because of overfishing and decreasing habitat due to human activities and other factors due to climate change (Ngoc-Tran and Thuy-Yen, 2016). This fish species is currently only often encountered populating and breeding wildly in inland water supplying canals where there is little water exchange, a low pH (around 5.4-5.7), dissolved oxygen of 3.4-5.50 mg L À1 , and a temperature of 29.3-30.3 °C (Ly, 2016). Also, Ly (2016) only achieved success in the artificial propagation trials of C. lucius in mediums with a pH range of 5.5-6.0 without success at higher pH levels in the Mekong Delta, Vietnam.…”

Section: Introductionmentioning

confidence: 99%

“…This fish species is currently only often encountered populating and breeding wildly in inland water supplying canals where there is little water exchange, a low pH (around 5.4-5.7), dissolved oxygen of 3.4-5.50 mg L À1 , and a temperature of 29.3-30.3 °C (Ly, 2016). Also, Ly (2016) only achieved success in the artificial propagation trials of C. lucius in mediums with a pH range of 5.5-6.0 without success at higher pH levels in the Mekong Delta, Vietnam. So, in addition to the abovementioned reasons for the decrease of natural stocks, specific pH conditions for proper development and reproduction is probably one of the reasons why natural populations have become very limited, leading C. lucius to be currently classified as endangered in Vietnam (Vietnam MARD, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…While Tra catfish (Pangasius hypophthalmus) is a primary economic freshwater fish for export (Tan et al, 2020), Snakehead has received high attention from domestic markets. Two Snakehead species, C. striata and C. micropeltes, have been domesticated and bred successfully, and they have also been commonly farmed in different rearing systems, such as earthen ponds, hapas, cages, tanks, and rice fields (Ly, 2016;Tan et al, 2020). However, C. lucius is still known as a wild fish.…”

Section: Introductionmentioning

confidence: 99%

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Hatching success and growth of Snakehead (Channa lucius Cuvier, 1831) larvae and fry at different pH levels

Ly,

Huang,

Lee

et al. 2024

Aquat. Living Resour.

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Snakehead (Channa lucius Cuvier, 1831) is a species of potential aquaculture interest in the Mekong Delta, Vietnam. However, their optimum environmental conditions have yet to be determined. This study aims to study the hatching success and larval and fry growth of C. lucius at six pH levels (5.5, 6.0, 6.5, 7.0, 7.5, and 8.0). Two consecutive experiments were conducted. Experiment 1 focused on incubating eggs and nursing the yolk sac larvae, and was carried out in aquariums. The monitoring included incubation time (IT), hatching rate (HR), and deformation rate of the newly hatched larvae (DR). Larvae were also collected daily during nursing for growth determination. In Experiment 2, four-day-old fry after hatching from experiment 1 were reared in plastic tanks with live feeds for 30 days. Growth was checked every ten days, while survival rate (SR) and coefficient of variation (CV) were determined at the end of the experiment. pH 5.5–8.0 was favorable for incubation, larvae, and fry, as assessed through good indicators of IT, HR, DR, and larval length and weight growths, as well as length and weight growths, SR, and CV of fry. Furthermore, the lowest DR (0.33%) was at pH 5.5, while except for pH 7.0, the shortest IT (41.1 h) significantly differed from that at higher pH levels (p < 0.05), and the highest larval growth parameters were at pH 5.5–6.0; meanwhile, pH 5.5–6.5 supported a better life for fry, as showed by the significantly higher growth parameters (p < 0.05) and SR and CV improvements in fry after 30 rearing days. Overall, pH 5.5–8.0 was suitable for the early stages of C. lucius, in which pH 5.5–6.0 was better for incubation and larval growth and pH 5.5–6.5 was better for fry development.

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Section: Introductionmentioning

confidence: 92%

Section: Experimental Designmentioning

confidence: 99%