کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8494730 1552850 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Artificial induction of maturation in female silver eels, Anguilla australis: The benefits of androgen pre-treatment
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Artificial induction of maturation in female silver eels, Anguilla australis: The benefits of androgen pre-treatment
چکیده انگلیسی
11-Ketotestosterone dramatically affects ovarian physiology in previtellogenic eels, notably increasing lipid accumulation and the expression of the follicle-stimulating hormone receptor. We therefore sought to combine androgen pre-treatment of female silver eels with “traditional” hypophysation in order to assess whether androgens constitute a valuable addition to induced spawning protocols. Eels were first implanted with different doses (0-30 mg) of 17-methyltestosterone to evaluate effects on oocyte size. Females (Trial I) were subsequently subjected to repeated injections with carp pituitary homogenate to artificially induce maturation. In a subsequent trial, we used 1 mg of androgen, implanted in either aromatizable (androstenedione) or non-aromatizable form (11-ketotestosterone) and again induced eels to mature artificially by repeated injections with carp pituitary homogenate. Androgen treatment significantly increased oocyte diameters prior to commencing carp pituitary homogenate treatment. Thereafter, less time, less money and less handling were required to reach the pre-ovulatory stage, while retaining comparable amounts of lipid in ovulated eggs. We contend that androgen pre-treatment has promise as a synchronizing and cost-effective measure for the artificial induction of maturation in anguillid eels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 437, 1 February 2015, Pages 111-119
نویسندگان
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