کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8493147 | 1552795 | 2018 | 56 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Embryonic, larval and juvenile development of the longfin batfish, Platax teira (Forsskål, 1775) under controlled conditions with special regard to mitigate cannibalism for larviculture
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Longfin batfish Platax teira is one of the most important finfish species in Asian aquaculture. However, knowledge on early ontogeny and reproduction of this species in captivity are scarce and incomplete. In this study, the embryonic, larval and juvenile development of P. teira are described and illustrated for the first time. The effect of temperature (27, 30 and 33â¯Â°C) on hatching rate, yolk-sac volume and oil globule volume was demonstrated. Cannibalism control via aeration adjustment for the enhancement of larval survival was also examined. Fertilized eggs were spherical, buoyant and had a diameter of 1.29â¯Â±â¯0.05â¯mm (meanâ¯Â±â¯SD). Embryonic development lasted 16â¯h at 26.2â¯Â°C. Newly hatched larvae were 2.81â¯Â±â¯0.24â¯mm in total length (LT) with 24 myomeres and had an oil globule in the ventroposterior area of the yolk sac. Early larvae had xanthophores appeared all over the body, except for the tip of the notochord. Larvae completed yolk absorption within 3â¯days post hatching (dph) at 3.41â¯Â±â¯0.11â¯mm LT. Larvae were fed initially on rotifers Brachionus ibericus, followed by Artemia nauplii and finally weaned onto an artificial diet. From 8 dph, the larger larvae (over 4â¯mm LT) began to exhibit cannibalistic behaviour. Transformation of larvae to the juvenile stage was completed at 23.80â¯Â±â¯1.98â¯mm LT, all fins had the adult complement of rays and spines. A statistical model: Yâ¯=â¯2.4968e0.0786x, where Y is mean LT (mm) and X represents dph, explained 96.45% of variation in growth (Pâ¯<â¯0.001, R2â¯=â¯0.9645). The hatching rate, yolk-sac volume and oil globule volume of newly hatched larvae were significantly (Pâ¯<â¯0.05) decreased when the incubation temperature increased. Only 2-6% of embryos hatched at 33â¯Â°C, while the hatching rate was 63â¯Â±â¯6% at 27â¯Â°C. Larvae reared in aeration rate of 300â¯mLâ¯minâ1 attained the highest survival rate at 70.00â¯Â±â¯7.20%, but remained significantly (Pâ¯<â¯0.05) lower in cannibalism: 24.44â¯Â±â¯4.16% compared with 66.67â¯Â±â¯5.44% in 20â¯mLâ¯minâ1. These results indicate that the optimal incubation temperature recommended is approximately at 27â¯Â°C, and aeration at 300â¯mLâ¯min â1 could enhance larval survival by reducing cannibalism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 493, 1 August 2018, Pages 204-213
Journal: Aquaculture - Volume 493, 1 August 2018, Pages 204-213
نویسندگان
Ming-Yih Leu, Ko-Yuan Tai, Pei-Jie Meng, Cheng-Hao Tang, Pin-Han Wang, Kwee Siong Tew,