THE EFFECT OF STARVATION AND REFEEDING PERIODS ON IONO-OSMOREGULATION OF 2+ CASPIAN TROUT

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AMIRI MOGHADDAM J.; MANIEI F.; KHODABANDEH S.; IMANPOOR NAMIN J.

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Journal: Journal of Fisheries Year:2012 | Volume:65 | Issue:2 Page(s): 109-118

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Title

THE EFFECT OF STARVATION AND REFEEDING PERIODS ON IONO-OSMOREGULATION OF 2+ CASPIAN TROUT

Author(s)

AMIRI MOGHADDAM J. | MANIEI F. | KHODABANDEH S. | IMANPOOR NAMIN J. | Issue Writer Certificate

Keywords

SALMO TRUTTA CASPIUSQ2

STARVATIONQ2

REFEEDINGQ2

OSMOREGULATIONQ2

Abstract

Effects of different nutritional conditions on iono-osmoregulation in juvenile of Caspian trout (SALMO TRUTTA CASPIUS) parrs were studied. Following adaption to the new environment, 750 Caspian trout parrs (12.5±1 g) were kept under the treatments of six weeks of full feedings (FFF), three weeks of feeding-three weeks of STARVATION (FS), six weeks of STARVATION (SSS), two weeks of feeding-two weeks of STARVATION-two weeks of re-feeding (FSF) and three weeks of STARVATION-three weeks of re-feeding (SF). Fish were fed with rainbow trout commercial feed three times a day up to satiation.There was no significant difference in serum sodium, chloride, potassium and magnesium between treatments, but serum osmolality decreased from 299 mOsmolkg-1 in FFF to 286 and 271 mOsmolkg-1 in FS and SSS (P<0.05), and re-feeding, after STARVATION periods, compensated the osmolality reduction to the similar levels in FFF. Five days after transferring the parrs to Caspian Sea (salinity: 13 gL-1), serum magnesium reached to 3.55 and 3.40 mEqL-1 in FS and SSS respectively (P<0.05), in comparison to FFF group (2.36 mEqL-1). Serum potassium showed also irregular significant difference between treatments (P<0.05), while chloride and sodium presented no significant difference. Serum osmolality levels increased to a maximum of 415 mOsmolkg-1 in FS and were decreased to a minimum of 306 mOsmolkg-1 in SSS (P<0.05), compare to FFF (366 mOsmolkg-1). We concluded that STARVATION has negative effects on ion regulatory capacity of Caspian trout parrs and although re-feeding can increase this capacity but effects of long period STARVATION cannot be compensated.

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APA: Copy

AMIRI MOGHADDAM, J., MANIEI, F., KHODABANDEH, S., & IMANPOOR NAMIN, J.. (2012). THE EFFECT OF STARVATION AND REFEEDING PERIODS ON IONO-OSMOREGULATION OF 2+ CASPIAN TROUT. JOURNAL OF FISHERIES (IRANIAN JOURNAL OF NATURAL RESOURCES), 65(2), 109-118. SID. https://sid.ir/paper/162124/en

Vancouver: Copy

AMIRI MOGHADDAM J., MANIEI F., KHODABANDEH S., IMANPOOR NAMIN J.. THE EFFECT OF STARVATION AND REFEEDING PERIODS ON IONO-OSMOREGULATION OF 2+ CASPIAN TROUT. JOURNAL OF FISHERIES (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2012;65(2):109-118. Available from: https://sid.ir/paper/162124/en

IEEE: Copy

J. AMIRI MOGHADDAM, F. MANIEI, S. KHODABANDEH, and J. IMANPOOR NAMIN, “THE EFFECT OF STARVATION AND REFEEDING PERIODS ON IONO-OSMOREGULATION OF 2+ CASPIAN TROUT,” JOURNAL OF FISHERIES (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 65, no. 2, pp. 109–118, 2012, [Online]. Available: https://sid.ir/paper/162124/en

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