Publication Date:
2021-05-19
Description:
Studies show that thyroxine can play an important role in regulating growth and other physiology activities. Since the direct role of thyroxine in growth metamorphose larval of bony fishes hasn't been proved yet, during
the experiment accomplished in Shahid Ansari and Jajrood station, the hormones function in the survival of
development of silver carp, grass carp and rainbow trout were studied.
In this study accomplished of thyroxine baths with 0.1, 0.5 and 1 ppm (with 3 repeat).
The other phase, thyroxine injected to females grass carp, silver carp, rainbow trout and barbell of Caspian
Sea with different doses (1, 10 and 100 g/g B.W.). Tehn survival of development of embryo and larval and
precent of fertilization were studied. Also, the percent of mortality were compared in two phases in stages of
development.
Result show that:
1) Trout: a)Phase of thyroxine bath: The number of hatching eggs and survival of larval in 0.5 ppm were
increased to other treatment.
b) Phase of hormone injection : The survival of larval in treatment of 10 g/g was 8.58% that was meaningful
difference to other treatment (P〈0.05).
2) Silver carp: a)Phase of thyroxine bath: The number of hatching eggs and survival of larval in 0.5 ppm
were ( 20%) increased to other treatment (P〈0.5).
b) Phase of hormone injection : The survival of larval in treatment of 10 g/g was meaningful difference to
other treatment (P〈0.05).
3) Grass carp : a)Phase of thyroxine bath: The number of hatching eggs and survival of larval in 0.5 ppm
were 39% increased to other treatment. b) Phase of hormone injection : The survival of larval in treatment of 1 g/g was meaningful difference to
other treatment (P〈0.05).
4) Barbel of Caspian Sea: Development stages wasn't determined in this fish. Number of eggs degenerated , number of eggs were the first development stages and growth of numbers increased on ovary.
Description:
Iranian Fisheries Science Research Institute
Description:
Published
Keywords:
Thyroxine
;
Female
;
Survival
;
Growth
;
Egg
;
Larval
;
Grass Carp
;
Silver Carp
;
Thyroxine (T4)
Repository Name:
AquaDocs
Type:
Report
,
Refereed
Format:
39pp.
Permalink
