Effects of Salinity on the Egg Fertilization, Hatching, and Tadpole Growth and Survival Rates of the Thailand Frog (Rana tigerina Dubois, 1981)

IF 0.7 4区 农林科学 Q4 FISHERIES
Huynh Kim Huong, Cheng-Ting Huang, Ho Khanh Nam, Nguyen Thi My Nhan, Doan Xuan Diep
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Abstract

We studied the effects of salinity on the egg fertilization, hatching, and tadpole growth and survival rates of the Thailand frog (Rana tigerina Dubois, 1981), an introduced species that is commonly cultured in the Mekong Delta, Vietnam. Salinity levels of 2, 6, and 4% significantly affected the fertilization and hatching rates of the eggs, as well as the tadpole survival rates from the newly hatched to yolk sac exhaustion stages, respectively (p < 0.05). Notably, during the stage from yolk sac exhaustion to juvenile tadpole, a salinity of 3% resulted in an increase in the final weight of the tadpoles throughout the stage and a significant increase in Phase 1 (the tadpole stage from yolk sac exhaustion to the onset of foreleg emergence) and Phase 2 (the tadpole stage from the onset of foreleg emergence to the onset of hind leg emergence); however, it did not show a significant effect on tadpole survival rates in Phases 1 and 2 of this stage (p > 0.05). A salinity level of up to 5% showed no significant effect on the growth performance but caused a significant reduction in the survival rates of the tadpoles during this stage. We recommend that the artificial reproduction process of Thai frogs should be performed using salinities of <2%, with salinities of ≤2 and 3% being suitable for rearing tadpoles from the newly hatched to yolk sac exhaustion stage and from the yolk sac exhaustion to juvenile stage, respectively.

盐度对泰国蛙(Rana tigerina Dubois,1981 年)受精卵、孵化和蝌蚪生长及存活率的影响
我们研究了盐度对泰国蛙(Rana tigerina Dubois, 1981)卵受精率、孵化率和蝌蚪生长及存活率的影响。2%、6% 和 4% 的盐度水平会显著影响卵的受精率和孵化率,以及蝌蚪从刚孵化到卵黄囊衰竭阶段的存活率(p0.05)。盐度最高为 5%时,对蝌蚪的生长性能没有明显影响,但会导致蝌蚪在此阶段的存活率明显下降。我们建议泰国蛙的人工繁殖过程应在盐度<2%的条件下进行,盐度≤2%和3%分别适合饲养刚孵化至卵黄囊耗竭阶段和卵黄囊耗竭至幼体阶段的蝌蚪。
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来源期刊
Journal of Applied Ichthyology
Journal of Applied Ichthyology 生物-海洋与淡水生物学
CiteScore
2.30
自引率
11.10%
发文量
73
审稿时长
3-8 weeks
期刊介绍: The Journal of Applied Ichthyology publishes articles of international repute on ichthyology, aquaculture, and marine fisheries; ichthyopathology and ichthyoimmunology; environmental toxicology using fishes as test organisms; basic research on fishery management; and aspects of integrated coastal zone management in relation to fisheries and aquaculture. Emphasis is placed on the application of scientific research findings, while special consideration is given to ichthyological problems occurring in developing countries. Article formats include original articles, review articles, short communications and technical reports.
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