Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1400
10
1
gregorian
2022
1
1
21
1
online
1
fulltext
en
Research Article: Ultrastructure and histology of reproductive system in the free-living marine nematode (Oncholaimus campylocercoides) with reference to polychlorinated biphenyls (PCBs) pollution in Persian Gulf
aquaculture
aquaculture
پژوهشي
Orginal research papers
Marine nematodes are the most important sediment living invertebrates. Free living nematodes are considered as bio indicators in coastal areas. Many pollutants such as polychlorinated biphenyls may affect their physiological process. The present study is conducted to describe physiological and histological pattern of marine nematode (<em>Oncholaimus </em><a href="https://www.google.com/search?rlz=1C1GCEU_enIR822IR822&q=oncholaimus+campylocercoid&tbm=isch&source=univ&sa=X&ved=2ahUKEwjWwZbE8L_gAhUPYVAKHfipBJcQsAR6BAgEEAE"><em>campylocercoid</em></a><em>es</em>) from north Persian Gulf. Three locations with different concentrations of PCBs were selected in Bandar Abbas for sampling. Sex steroid hormones (progesterone, testosterone and 17-B estradiol) were analysed after separation and purification of marine nematodes from sediments. Moreover, fine structures of ovocyte and spermatozoa were studied after histological observation. Results showed that sex ratios were F(1): M(0.97), F(1): M (0.9), F(1): M(0.5) in locations with 0.01, 0.02 and 0.1 µg/mL tissue PCB concentrations, respectively. Level of 17 β-estradiol (1.2±0.07pg/mL) in females at the location with 0.1 µg/mL PCB (power plant) was significantly higher than that in other two sampling locations. Also high level of testosterone (0.4±0.07 pg/mL) was observed in males and females at the polluted sampling site compared with that in other two locations. Histological study showed that in the location with high PCBs, there was an obvious increase in size of oocytes. We concluded that PCBs can affect sex steroid changes as endocride disruptors in <em>Oncholaimus </em><a href="https://www.google.com/search?rlz=1C1GCEU_enIR822IR822&q=oncholaimus+campylocercoid&tbm=isch&source=univ&sa=X&ved=2ahUKEwjWwZbE8L_gAhUPYVAKHfipBJcQsAR6BAgEEAE"><em>campylocercoid</em></a><em>es.</em> Results of this study supported findings of previous studies on PCB endocrine disrupting roles in marine organisms.
Sex steroids, Ultrastructure, Nematode, Oncholaimus campylocercoides, Persian Gulf, Polychlorinated biphenyls (PCBs)
264
287
http://jifro.ir/browse.php?a_code=A-10-2101-3&slc_lang=en&sid=1
H.
Hosseinzadeh
h_hosseinzadeh@yahoo.com
100319475328460045501
100319475328460045501
Yes
Iranian Fisheries Science Research Institute, Agriculture Research, Education and Extension Organization, Tehran, Iran
N.
Sahraeiyan
fereshtehs@gmail.com
100319475328460045502
100319475328460045502
No
Iranian Fisheries Science Research Institute, Agriculture Research, Education and Extension Organization, Tehran, Iran
H.
Mosallanejad
hmosalla@gmail.com
100319475328460045503
100319475328460045503
No
Iranian Research Institute of Plant Protection, Agriculture Research, Education and Extension Organization, Tehran, Iran