Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus)
Abstract Background Determination of sex in fish without external sexual dimorphism is important. Sex determination of the flathead grey mullet (Mugil cephalus) in the culture system and spawn‐producing and fish reproduction system is very important. Currently, there are several methods to determine...
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| Format: | Article |
| Language: | English |
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Wiley
2023-03-01
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| Series: | Veterinary Medicine and Science |
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| Online Access: | https://doi.org/10.1002/vms3.1066 |
| _version_ | 1797866293909520384 |
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| author | Majid Masoudifard Alireza Vajhi Shahrzad Mohammadshahali Omid Zehtabvar Mehdi Moghim Seyed Amin Mirhashemi Rostami |
| author_facet | Majid Masoudifard Alireza Vajhi Shahrzad Mohammadshahali Omid Zehtabvar Mehdi Moghim Seyed Amin Mirhashemi Rostami |
| author_sort | Majid Masoudifard |
| collection | DOAJ |
| description | Abstract Background Determination of sex in fish without external sexual dimorphism is important. Sex determination of the flathead grey mullet (Mugil cephalus) in the culture system and spawn‐producing and fish reproduction system is very important. Currently, there are several methods to determine the sex of fish; however, they are time‐consuming, expensive and sometimes dangerous for the fish. Objective The purpose of this study was the sex determination of flathead grey mullet by ultrasonography as a safe and accurate method. Methods In this regard, 30 flathead grey mullets (early in their maturation) from a farm in Gomishan‐Golestan province, Iran were examined using a portable ultrasound machine with a 6–12 MHz waterproof linear transducer. Scanning was performed on the ventral body surface in the sagittal and transverse planes, between ventral and anal fins. Results Differences in shape, qualitative size, echogenicity and the wall layers of the ovary and testis were evaluated for sex determination. Results of ultrasonography were confirmed immediately at necropsy. Ultrasonographic accuracy for sex determination was 100%. The speed of the procedure was around 30 s per fish. Conclusions Overall, the sex determination of flathead grey mullet by ultrasonography was high in accuracy and speed, non‐invasive and safe for fish and consumers, and may be considered a priority. Place of the organs in the M. cephalus coelomic cavity and the obtained experience showed that for rapid and easy sex identification, the best place to put the transducer is on the ventral surface of the fish in the caudal part of the coelomic cavity for taking transverse and sagittal ultrasonograms. |
| first_indexed | 2024-04-09T23:21:42Z |
| format | Article |
| id | doaj.art-570271db41f94dd7926bae9e54416b1e |
| institution | Directory Open Access Journal |
| issn | 2053-1095 |
| language | English |
| last_indexed | 2024-04-09T23:21:42Z |
| publishDate | 2023-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Veterinary Medicine and Science |
| spelling | doaj.art-570271db41f94dd7926bae9e54416b1e2023-03-21T15:53:53ZengWileyVeterinary Medicine and Science2053-10952023-03-019280280910.1002/vms3.1066Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus)Majid Masoudifard0Alireza Vajhi1Shahrzad Mohammadshahali2Omid Zehtabvar3Mehdi Moghim4Seyed Amin Mirhashemi Rostami5Department of Surgery and Radiology Faculty of Veterinary Medicine University of Tehran Tehran IranDepartment of Surgery and Radiology Faculty of Veterinary Medicine University of Tehran Tehran IranGraduated DVM Student Faculty of Veterinary Medicine Tehran University Tehran IranAnatomy Sector Department of Basic Science Faculty of Veterinary Medicine University of Tehran Tehran IranCaspian Sea Ecology Research Center Iranian Fisheries Science Research Institute Sari IranInland Waters Aquatic Stocks Research Center – Gorgan Iranian Fisheries Sciences Institute Agricultural Research Education and Extension Organization Gorgan IranAbstract Background Determination of sex in fish without external sexual dimorphism is important. Sex determination of the flathead grey mullet (Mugil cephalus) in the culture system and spawn‐producing and fish reproduction system is very important. Currently, there are several methods to determine the sex of fish; however, they are time‐consuming, expensive and sometimes dangerous for the fish. Objective The purpose of this study was the sex determination of flathead grey mullet by ultrasonography as a safe and accurate method. Methods In this regard, 30 flathead grey mullets (early in their maturation) from a farm in Gomishan‐Golestan province, Iran were examined using a portable ultrasound machine with a 6–12 MHz waterproof linear transducer. Scanning was performed on the ventral body surface in the sagittal and transverse planes, between ventral and anal fins. Results Differences in shape, qualitative size, echogenicity and the wall layers of the ovary and testis were evaluated for sex determination. Results of ultrasonography were confirmed immediately at necropsy. Ultrasonographic accuracy for sex determination was 100%. The speed of the procedure was around 30 s per fish. Conclusions Overall, the sex determination of flathead grey mullet by ultrasonography was high in accuracy and speed, non‐invasive and safe for fish and consumers, and may be considered a priority. Place of the organs in the M. cephalus coelomic cavity and the obtained experience showed that for rapid and easy sex identification, the best place to put the transducer is on the ventral surface of the fish in the caudal part of the coelomic cavity for taking transverse and sagittal ultrasonograms.https://doi.org/10.1002/vms3.1066anatomygonadsMugil cephalussex determinationultrasonography |
| spellingShingle | Majid Masoudifard Alireza Vajhi Shahrzad Mohammadshahali Omid Zehtabvar Mehdi Moghim Seyed Amin Mirhashemi Rostami Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus) Veterinary Medicine and Science anatomy gonads Mugil cephalus sex determination ultrasonography |
| title | Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus) |
| title_full | Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus) |
| title_fullStr | Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus) |
| title_full_unstemmed | Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus) |
| title_short | Ultrasonographic sex determination of the flathead grey mullet (Mugil cephalus) |
| title_sort | ultrasonographic sex determination of the flathead grey mullet mugil cephalus |
| topic | anatomy gonads Mugil cephalus sex determination ultrasonography |
| url | https://doi.org/10.1002/vms3.1066 |
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