کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8493073 | 1552793 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Paired spawning with male rotation of meagre Argyrosomus regius using GnRHa injections, as a method for producing multiple families for breeding selection programs
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Paired spawning with male rotation of meagre Argyrosomus regius using GnRHa injections, as a method for producing multiple families for breeding selection programs Paired spawning with male rotation of meagre Argyrosomus regius using GnRHa injections, as a method for producing multiple families for breeding selection programs](/preview/png/8493073.png)
چکیده انگلیسی
Weekly gonadotropin-releasing hormone agonist (GnRHa) injections were used to induce spawning in paired male and female meagre (Argyrosomus regius) with a weekly rotation of the males, in order to produce a large number of families, as a method to facilitate selective breeding programs. Two different broodstocks were used (HCMR and IRTA), with females of mean weights of 11.7â¯Â±â¯2.6â¯kg and 20.0â¯Â±â¯1.8â¯kg, and males of 10.2â¯Â±â¯1.2â¯kg and 15.1â¯Â±â¯1.0â¯kg, respectively. A single GnRHa injection of 15â¯Î¼gâ¯kgâ1 was administered to each selected female, and 7.5 or 15â¯Î¼gâ¯kgâ1 to each male to induce spawning. In the subsequent weeks, maturity was checked and fish were induced as above, but males (nâ¯=â¯18) were rotated to form a different pair with the selected females (nâ¯=â¯21). Experiments finished when all paired combinations had been completed or a fish lost maturity status and could not be induced further. A total of 56 families were produced with a mean number of eggs from each family of 87,666â¯Â±â¯11,244â¯eggsâ¯kgâ1. There was a decline in the fecundity, number of spawns and percentage of pairs that spawned successfully after consecutive weekly GnRHa injections. Relative fecundity declined significantly from 134,495â¯Â±â¯25,557â¯eggsâ¯kgâ1 female body weight after the first injection, to 44,252â¯Â±â¯17,638â¯eggsâ¯kgâ1 after the fourth injection. However, there were no differences amongst weeks in egg fertilization success, hatching success or larval survival to 5â¯days post hatch. The decrease in fecundity and spawning success was attributed to a loss of maturity observed in the females, which may be related to differences in mate selection strategies between male and female meagre. The study demonstrated that paired spawning with male rotation was a successful method that can be used for breeding programs to produce a limit of three families per female or as a scaling up step to produce large numbers of offspring from a limited number of selected pairs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 495, 1 October 2018, Pages 506-512
Journal: Aquaculture - Volume 495, 1 October 2018, Pages 506-512
نویسندگان
Neil J. Duncan, Constantinos C. Mylonas, Edwards Milton Sullon, Dimitris Karamanlidis, Maria Claudia França Nogueira, Zohar Ibarra-Zatarain, Marco Chiumento, Ricardo Olinser Aviles Carrillo,