Ovarian development, spawning season, size at maturity and fecundity of Acentrogobius viridipunctatus (Valenciennes, 1837) in the Vietnamese Mekong Delta

Quang Minh Dinh; Ton Huu Duc Nguyen; Ngon Trong Truong; Diep Xuan Doan; Tien Thi Kieu Nguyen

doi:10.7717/peerj.14077

Ovarian development, spawning season, size at maturity and fecundity of Acentrogobius viridipunctatus (Valenciennes, 1837) in the Vietnamese Mekong Delta

PeerJ. 2022 Sep 22:10:e14077. doi: 10.7717/peerj.14077. eCollection 2022.

Authors

Quang Minh Dinh¹, Ton Huu Duc Nguyen¹, Ngon Trong Truong², Diep Xuan Doan³, Tien Thi Kieu Nguyen⁴

Affiliations

¹ Department of Biology, School of Education, Can Tho University, Can Tho, Vietnam.
² Department of Molecular Biotechnology, Biotechnology Research and Development Institute, Can Tho University, Can Tho, Vietnam.
³ Medicinal Chemistry, Hi-tech Agriculture & Bioactive Compounds Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam.
⁴ Department of Biology, An Khanh High School, Can Tho, Vietnam.

Abstract

This present study provides an overview of the reproductive traits, including ovarian development, spawning season, size at maturity (L_m ), and fecundity of Acentrogobius viridipunctatus - a high economic value fish in the Vietnamese Mekong Delta (VMD). A total of 432 females were collected using trawl nets from January to December 2020 at four sites, including Long Huu-Tra Vinh (LHTV), Trung Binh-Soc Trang (TBST), Dien Hai-Bac Lieu (DHBL), and Tan Thuan-Ca Mau (TTCM). The ovarian diameter was seen to increase from 2.09 (stage I) to 6.57 mm (stage V). Histological analysis showed that the goby was a multi-spawner due to the different oocyte stages found in stages IV and V of ovaries. It can release eggs all year-round due to the monthly appearance of ovarian stages IV and V during the study period, with the main peak in the 2-4 months of the wet season noted with the highest value of gonadosomatic index at that time. The L_m increased from 6.6 cm at TBST to 9.4 cm at TTCM. This species displayed relatively high fecundity, ranging from 5,481 to 130,683 eggs/female. The average fecundity of this fish was 27,698 ± 7,983 eggs/female at LHTV, 46,592 ± 7,264 eggs/female at TBST, 23,271 ± 4,985 eggs/female at DHBL, and 31,408 ± 2,515 eggs/female at TTCM. Egg diameter ranged from 0.45 ± 0.01 at DHBL to 0.50 ± 0.01 at TBST. For sustainable exploitation, local governments should ask the fishers to avoid catching fish during the main spawning period, and the fish length at first capture should be >L_m .

Keywords: Multi-spawner; Ovary; Size at first maturity; Spotted green goby.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Animals
Female
Fertility
Fishes
Humans
Ovary*
Perciformes*
Reproduction*
Seasons
Southeast Asian People

Supplementary concepts

Vietnamese people

Grants and funding

This work is funded by Can Tho Univeristy. Van Lang University, Vietnam provided the authors with financial support for this research. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.