Structure of the testicular maturation in the duckbill conger, Gavialiceps javanicus from Andaman sea, Thailand
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Abstract
A comprehensive database on the spermatogenic differentiation of the estuarine and coastal teleosts has been widely investigated; however, very few of this knowledge above are documented in the mesopelagic fish living in 600-1,000 m. In this study, the testicular maturation with emphasis on the germinal compartment of Gavialiceps javanicus was performed using histological techniques. All mesopelagic fish samples (n = 7) with the total length and weight of 56.00±7.88 cm and 64.00±16.29 g were collected in October 2018 from Andaman sea, Thailand. After dissected goands, all samples were investigated using the standard histological approaches. The results from our study showed that all G. javanicus were considered as the male fish, which the testes having pairs of organs showed. The arrangement of each testis composed of two main regions including testicular tissue and vasa efferentia. Within the testicular parenchyma, it was also identified into two distinct compartments (interstitial and germinal compartments). Indeed, the germinal compartment composed of several seminiferous lobules, which each lobule contained in both somatic Sertoli cell and spermatogenic differentiation from spermatogonium into spermatozooa. The occurrences of spermatogonia of this fish were widely distributed along the seminiferous lobule. This pattern was namely designed as “an unrestricted spermatogonia testicular type”. Our result firstly present on basis of male reproductive biology, which will be accurately applied to deep knowledge such as reproductive cycle, the adaptation of reproductive strategy and histopathology of this fish.
Article Details
บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการเผยแพร่ในวารสารวิทยาศาสตร์และเทคโนโลยี มรย. นี้ ถือเป็นลิขสิทธิ์ของวารสารวิทยาศาสตร์และเทคโนโลยี มรย. หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือกระทำการใดๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษรจากวารสารวิทยาศาสตร์และเทคโนโลยี มรย. ก่อนเท่านั้น
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