Gonadal and Germ Cells Morphology of Nuchequula gerreoides and Eubleekeria splendens (Leiognathidae) from the Pranburi River Estuary of Thailand

T. Kanjanarakha; Канджанаракха Т.; J. Kettratad; Кеттратад Дж.; S. Senarat; Сенарат С.; W. Jiraungkoorskul; Джираунгкоорскул В.; K. Angsujinda; Ангсуджинда К.; G. Kaneko; Канеко Г.

doi:10.31857/S0042875223040100

Gonadal and Germ Cells Morphology of Nuchequula gerreoides and Eubleekeria splendens (Leiognathidae) from the Pranburi River Estuary of Thailand

Authors: Kanjanarakha T.¹, Kettratad J.¹, Senarat S.², Jiraungkoorskul W.³, Angsujinda K.⁴, Kaneko G.⁵
Affiliations:
1. Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
2. Department of Marine Science and Environment, Faculty of Science and Fisheries Technology, Rajamangala University of Technology Srivijaya, Trang, Thailand
3. Pathology Division, Preclinical Health Science Center, Faculty of Medicine, Bangkokthonburi University, Bangkok, Thailand
4. Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, Thailand
5. College of Natural and Applied Science, University of Houston-Victoria, Victoria, USA
Issue: Vol 63, No 4 (2023)
Pages: 450
Section: Articles
URL: https://journals.rcsi.science/0042-8752/article/view/135212
DOI: https://doi.org/10.31857/S0042875223040100
EDN: https://elibrary.ru/RNPKGV
ID: 135212

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Abstract

The decorated ponyfish Nuchequula gerreoides and splendid ponyfish Eubleekeria splendens are two abundant leiognathid species in the Pranburi River Estuary, Thailand. However, information about their reproductive activity is still limited, preventing the implementation of effective conservative management. In this study, we investigated the sex ratio and the reproductive characteristics in relation to the size distribution of these polyfish species. Fishes were collected during February to November in 2017. The male to female ratios in N. gerreoides and E. splendens were 1.00 : 5.65 (χ2 = 55.2) and 1.00 : 4.65 (χ2 = 40.0), respectively. These ponyfishes shared similar morphology and histology of the reproductive system. All females were classfied as a juvenile because only undeveloped stage (stage 0) oocytes were found in the ovary. Males below 3.4 cm were all juvenile, but all males above 3.4 cm were mature having spermatogenic cells at spermatogenic stages.

Keywords

ponyfishes, Pranburi River estuary, reproductive histology, sex ratio, Thailand

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