کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5539287 1552809 2017 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of breeding frequency and reproductive performance of pearlspot Etroplus suratensis by curtailing parental care
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Enhancement of breeding frequency and reproductive performance of pearlspot Etroplus suratensis by curtailing parental care
چکیده انگلیسی
Increasing the breeding frequency and reproductive performance of pearlspot, Etroplus suratensis in small tank system by manipulating parental care and salinity is reported. A total of 3 experiments were carried out to evaluate the reproductive performance of pearlspot. In the first experiment on breeding of pearlspot involving parental care (without larval separation), production of a single batch of offspring per pair of parent fish (294 larvae, 24-43 fry) was observed after 90 days. Whereas the second experiment on pearlspot breeding by curtailing parental care (with larval separation) demonstrated a higher breeding frequency; 6 in 120 days. The average inter-spawning interval and larval production were 17.6 ± 1.12 days and 1333.3 ± 143.0 respectively. The third experiment was to evaluate the breeding frequency of pearlspot at low (5.40 ± 0.75‰) and high salinity (27.20 ± 0.80‰) by curtailing parental care. The average inter-spawning interval was found to be significantly (p < 0.05) lower (32.14 ± 4.38 days) at low salinity when compared to high salinity (64.37 ± 12.95 days). Similarly, the breeding frequency was also higher at lower salinity in 215 days (5.66 ± 0.66 at low compared to 3.67 ± 0.67 at high salinity). The present study demonstrated that i) curtailing parental care through larval separation can be used to improve the breeding frequency and reproductive performance of pearlspot in captivity ii) relatively lower salinity reduced the inter-spawning interval of pearlspot iii) feasibility of breeding pearlspot in small tank system (1000 L).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 479, 1 October 2017, Pages 352-356
نویسندگان
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