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Reproduction of the ctenophore, Beroe ovata, in the Caspian Sea water
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چکیده: (3782 مشاهده) |
| The experiments with Beroe ovata showed that this ctenophore can survive and reproduce in the Caspian Sea water, though at far lower rate than in the Black Sea; larval growth in the Caspian Sea water was also slower and mortality higher. Maximum fecundity of 2210 and 240 eggs recorded in laboratories of Turkey and Iran, respectively. About 34 to 100% of eggs in the Caspian Sea water could not develop and hatch. Larvae were at different stages of development, usually with size between 1.2 to 2mm. The highest number of eggs and larvae were obtained in tanks where Beroe individuals were together with Mnemiopsis leidyi. The poor reproduction of B. ovata in the Caspian Sea water could be due to both the acclimation stress to low salinity and possible damage of individuals during the transportation. |
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متن کامل [PDF 2098 kb]
(1202 دریافت)
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نوع مطالعه: پژوهشي |
موضوع مقاله:
aquaculture
دریافت: 1396/9/18 | پذیرش: 1396/9/18 | انتشار: 1396/9/18
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