Degeneration of the olfactory epithelium in the Anguilid eels by hormone treatment

Ching Fui Fui @ Faihana Ching Abdullah and Gunzo Kawamura and Kazuhiko Anraku and Bensan Alex and Nabilah Zieha Sikh Mohamad and Shigeharu Senoo (2019) Degeneration of the olfactory epithelium in the Anguilid eels by hormone treatment. Borneo Journal of Marine Science and Aquaculture, 3. 48 -51. ISSN 2289-5892

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Abstract

While the olfactory cue hypothesis has been proposed for spawning migration of silver eels, it has been shown that olfactory cells and associated mucus cells degenerate in male and female eels after hormonally induced sexual maturation. However, the degeneration of the olfactory organ could be a real event in the sequence of maturation, or may be an unnatural side effect of the hormone treatment itself. We morphologically and histologically examined the olfactory rosettes of hormone-untreated and hormone-treated (mixture of hCG and PG) giant mottled eel (Anguilla marmorata) and Japanese eel (A. japonica). The olfactory rosette from all the hormone-treated specimens significantly degenerated at various degeneration levels even in sexually immature specimens, indicating the side effect of the hormone-treatment. However, a sexually immature non-hormone treated female A. marmorata (87.4 cm TL, 199.4 g BW, at less advanced maturity) had slightly degenerated olfactory rosette. Further studies should focus on conducting natural degeneration of the olfactory rosette during the sexual maturation in tropical eels

Item Type:	Article
Keyword:	Olfactory organ , Tropical eel , Spawning migration
Subjects:	Q Science > QL Zoology S Agriculture > SH Aquaculture. Fisheries. Angling
Department:	INSTITUTE > Borneo Marine Research Institute
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	14 Jul 2021 15:59
Last Modified:	14 Jul 2021 15:59
URI:	https://eprints.ums.edu.my/id/eprint/29962

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