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


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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.

About the authors

T. Kanjanarakha

Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand

Email: j.ichthyology@gmail.com
Таиланд, Бангкок

J. Kettratad

Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand

Email: j.ichthyology@gmail.com
Таиланд, Бангкок

S. Senarat

Department of Marine Science and Environment, Faculty of Science and Fisheries Technology, Rajamangala University of Technology Srivijaya, Trang, Thailand

Email: j.ichthyology@gmail.com
Таиланд, Транг

W. Jiraungkoorskul

Pathology Division, Preclinical Health Science Center, Faculty of Medicine, Bangkokthonburi University, Bangkok, Thailand

Email: j.ichthyology@gmail.com
Таиланд, Бангкок

K. Angsujinda

Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, Thailand

Email: j.ichthyology@gmail.com
Таиланд, Бангкок

G. Kaneko

College of Natural and Applied Science, University of Houston-Victoria, Victoria, USA

Author for correspondence.
Email: j.ichthyology@gmail.com
США, Виктория

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Copyright (c) 2023 Т. Канджанаракха, Дж. Кеттратад, С. Сенарат, В. Джираунгкоорскул, К. Ангсуджинда, Г. Канеко