Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1401
2
1
gregorian
2022
5
1
21
3
online
1
fulltext
en
Research Article: Determining the optimal time for artificial propagation in Hilsa shad (Tenualosa ilisha) based on thyroid and steroid hormones levels
Biology & physiology
Biology & physiology
پژوهشي
Orginal research papers
<span style="font-size:12pt"><span new="" roman="" style="font-family:" times=""><span style="font-size:11.5pt"><span style="color:black">Steroid hormones in teleost have an important role in gonadal development and sexual maturity. Hilsa shad (<i>Tenualosa ilisha</i>) is important for fisheries in the South of Iran. Any information on steroid hormones of Hilsa shad brooders and their relationship with the spawning period provides a vital step for studies on the propagation and culture of this species. Fish samples were captured from four location-time stations: September-fresh water (Salinity: 5.2±0.35 ppt, Temperature: 27±0.17 ºC, DO: 7.9±0.23 mg/L; Karoon river, Khorramshahr; 1<sup>st</sup> station), September-marine water (Salinity: 44.01±0.5 ppt, Temperature: 26.5±0.41 ºC, DO: 7.45±0.52 mg/L; Bahrakan Port, Persian Gulf; 2<sup>nd</sup> station), October-marine water (Salinity: 41.77±0.25 ppt, Temperature: 15.27±0.32 ºC, DO: 9.36±0.10 mg/L; Bahrakan Port, Persian Gulf; 3<sup>rd</sup> station), and November-marine water (Salinity: 40.01±0.28 ppt, Temperature: 14.91±0.37 ºC, DO: 9.45±0.18 mg/L; Bahrakan Port, Persian Gulf; 4<sup>th</sup> station). Blood samples were immediately collected by a 5 ml syringe from the caudal vein, and serum was separated after centrifuging (7640 <i>g</i>,10 min). Also, gonad developmental stages and Gastro-somatic index (GSI) were determined after necropsy of euthanized fish. The enzymatic Immunological Assay method is used for hormone measurements, including thyroxin (T4), triiodothyronine (T3), 17-β estradiol (E2), and testosterone (T). More samples at the 1<sup>st</sup> station were on the 5<sup>th</sup> gonadal development stage with the highest GSI index. The maximum and minimum serum E2 levels were recorded at the 1<sup>st</sup> and 2<sup>nd</sup> stations, respectively. The serum testosterone concentration at the 1<sup>st</sup> station was significantly higher than the other ones and the maximum T3 and T4 concentrations were recorded at the 4<sup>th</sup> station. The results of this study proposed that Hilsa shad females are ready for spawning in September and this time is proposed for collecting broodstocks from the Karoon river (Khorramshahr, Khuzestan) for artificial propagation.</span></span></span></span>
Persian Gulf, Karoon River, Thyroxin, Triiodothyronine, 17-β estradiol, Testosterone, Tenualosa ilisha
741
757
http://jifro.ir/browse.php?a_code=A-10-3211-1&slc_lang=en&sid=1
A.
Asadi Eidivand
asadasadi64@gmail.com
100319475328460046382
100319475328460046382
No
Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran
S.M.
Mousavi
seied1356@yahoo.com
100319475328460046383
100319475328460046383
Yes
Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran
S.R.
Fatemi Tabatabei
fatemi_r@scu.ac.ir
100319475328460046384
100319475328460046384
No
Department of Basic Science, Faculty of veterinary Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
M.
Zakeri
mhdzakeri@yahoo.com
100319475328460046385
100319475328460046385
No
Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran
N.
Zanguee
zanguee_n@yahoo.com
100319475328460046386
100319475328460046386
No
Department of Fisheries, Faculty of Marine Natural Resources, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran