ADAPTATION POSSIBILITY OF ACIPENSER PERSICUS LARVAE 20 DAYS OLD IN DIFFERENT SALINITIES

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BAHMANI M.; YOUSEFI JOURDEHI A.

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Journal: IRANIAN JOURNAL OF BIOLOGY Year:2011 | Volume:24 | Issue:5 Page(s): 669-678

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Title

ADAPTATION POSSIBILITY OF ACIPENSER PERSICUS LARVAE 20 DAYS OLD IN DIFFERENT SALINITIES

Author(s)

BAHMANI M. | YOUSEFI JOURDEHI A. | Issue Writer Certificate

Keywords

ACIPENSER PERSICUS LARVAEQ2

OSMOLARITYQ2

PHYSIOLOGICAL ADAPTATIONQ2

SALINITY AND CASPIAN SEAQ2

Abstract

This study was carried out in order to evaluation of adaptation capability of 20 day-old ACIPENSER PERSICUS LARVAE to different salinities for investigation of releasing possibility of them into the Caspian sea to provide for water shortage and appearing the drought crisis. To study the physiological adaptability ofA. persicus at May-June 2008, a total of 7000 larvae, 20 day-old (100-150 mg in weight and mean length of 9.6±0.14 mm) were stocked in fiber glass tanks (with volume 2 tones) at different salinities of 1, 3, 5, 7, 8 and 12 ppt (brackish water from the Caspian Sea) and also freshwater with salinity of 0.8 ± 0.1ppt. Larvae stocked in freshwater were used as the control group. During the experimental period which lasted for 72 h, survival rate, OSMOLARITY of water in the culture system and OSMOLARITY of water in interstitial tissues of larvae and the physical and chemical parameters of water were studied. Minimum mortality (0%) and maximum survival rate (100%) were recorded in the control group as well as in 1, 3 and 5 ppt salinities. Maximum mortality and minimum survival rate were observed in the experimental group with 12 ppt salinity (brackish water from the Caspian Sea) and were 0.2 ± 0.03 and 99.8 ± 0.04. In this group larvae became weak and inactive a few minutes after being introduced to the culture system and collected along the margins of the tank and showed no response to environmental clues and feeding. However, after 24 h, adapting to the conditions they returned to their normal state. OSMOLARITY of water in the culture medium and in interstitial tissues of larvae in changes salinities differed after 48 h. Minimum OSMOLARITY was recorded in the control group (43±0.7 mOsmol l-1 in water and 252±2.5 mOsmol l-1 in interstitial tissues) and maximum OSMOLARITY was recorded in the 12 ppt experimental group (359±1.1 mOsmol l-1 in water and 407±7.1 mOsmol l-1 in interstitial tissues) (P<0.05). Based on examinations, it seems that A. persicuslarvae have probably the potential to adapt to different salinities (1, 3, 5, 7, 8 and 12 ppt) by having the ability of osmoregulation system and maintaining electrolytes equivalent in hyperosmotic areas. By conducting further studies this potential can be considered as an advantage for their early release into natural ecosystems. The obtained results can be used to develop a new pattern for the culture of sturgeon larvae and may also be used to enhance restocking programs for these species.

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APA: Copy

BAHMANI, M., & YOUSEFI JOURDEHI, A.. (2011). ADAPTATION POSSIBILITY OF ACIPENSER PERSICUS LARVAE 20 DAYS OLD IN DIFFERENT SALINITIES. IRANIAN JOURNAL OF BIOLOGY, 24(5), 669-678. SID. https://sid.ir/paper/21302/en

Vancouver: Copy

BAHMANI M., YOUSEFI JOURDEHI A.. ADAPTATION POSSIBILITY OF ACIPENSER PERSICUS LARVAE 20 DAYS OLD IN DIFFERENT SALINITIES. IRANIAN JOURNAL OF BIOLOGY[Internet]. 2011;24(5):669-678. Available from: https://sid.ir/paper/21302/en

IEEE: Copy

M. BAHMANI, and A. YOUSEFI JOURDEHI, “ADAPTATION POSSIBILITY OF ACIPENSER PERSICUS LARVAE 20 DAYS OLD IN DIFFERENT SALINITIES,” IRANIAN JOURNAL OF BIOLOGY, vol. 24, no. 5, pp. 669–678, 2011, [Online]. Available: https://sid.ir/paper/21302/en

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