Population Dynamics of the Caroun Croaker Johnius carouna (Cuvier, 1830) in Coastal Fishing Ground in the Middle Gulf of Thailand


  • Amonsak SAWUSDEE Division of Marine Science, School of Science, Walailak University, Nakhon Si Thammarat 80160, Thailand https://orcid.org/0000-0003-1286-540X
  • Jantira RATTANARAT Division of Marine Science, School of Science, Walailak University, Nakhon Si Thammarat 80160, Thailand




Croaker population, Local fishery, Coastal species, Fishery management , Croaker population


The stock status of coastal species is currently of high concern among the people. In the Gulf of Thailand, Croakers are important economic species commonly found in the coastal fishing ground, especially in Nakhon Si Thammarat province. The population dynamics of the Caroun croaker, Johnius carouna (Cuvier, 1830), was investigated using length-frequency distribution data collected from February 2019 to January 2020. The length-weight relationship equation suggested that J. carouna is isometric growth. The asymptotic total length (L) and curvature growth (K) were 22.28 cm and 0.72 year-1, respectively. Based on L and K, the total mortality rate during the study period was estimated at 3.66 year-1; natural mortality and fishing mortality rates were estimated at 1.62 and 1.74 year-1, respectively. While biological data revealed that matured size was 15.3 cm, the fishing data suggested that the average catch size (15.12 cm) was slightly smaller than the matured size. The exploitation rate was 0.52 year-1. The result from this research suggests that current fishing pressure is slightly high. This study suggested that increasing catch size by increasing mesh size of gillnets seems to be a better solution to improve J. carouna stock in Thasala fishing ground in the future.


  • The first report onJohnius carouna fishery biology in coastal fishing ground in the middle Gulf of Thailand
  • Johniuscarouna is an isometric fish
  • Matured size of Johniuscarouna  is 15.3 cm
  • Current fishing pressure on Johniuscarouna is slightly high



Download data is not yet available.


Metrics Loading ...


K Sasaki. Sciaenidae. Croakers (drums). In: KE Carpenter and VH Niem (Eds.). FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 5. Bony fishes part 3 (Menidae to Pomacentridae). FAO, Rome, 2001, p. 3117-74.

JD Bell, RA Watson and Y Ye. Global fishing capacity and fishing effort from 1950 to 2012. Fish Fish. 2016; 18, 489-505.

WE Ricker. Computation and interpretation of biological statistics of fish populations. Bull. Fish. Res. Bd. Canada 1975; 191, 382-92.

FCJ Gayanilo, P Sparre and D Pauly. The FAO-ICLARM stock assessment tools (FiSAT) User’s Guide. FAO Computerized Information Series (Fisheries), ICLARM Contribution No. 1048. ICLARM, Manila, 1995, p. 126.

JA Gulland. Fish Stock Assessment: A Manual of Basic Methods. Vol. I. FAO/Wiley Series on Food and Agriculture, Chichester, 1983, p. 223.

US Amarasinghe and SS De Silva. Population dynamics of Oreochromis mossambicus and O. niloticus (Cichidae) in two reservoirs in Sri Lanka. Asian Fish. Sci. 1992; 5, 37-61.

D Pauly. Some simple methods for the assessment of tropical fish stocks. FAO Fisheries Technical paper No. 234, 1983, p. 54.

JL Munro and D Pauly. A simple method for comparing growth of fish and invertebrates. Fishbyte 1983; 1, 5-6.

NS Mattson. 1997, Fish production and ecology in African small water bodies with emphasis on tilapia. Ph.D. Dissertation. Stockholm University, Stockholm, Sweden.

D Pauly. Length-converted catch curves and the seasonal growth of fishes. Fishbyte 1990; 8, 33-8.

FCJ Gayanilo and D Pauly. FAO-ICLARM stock assessment tools: Reference manual. FAO Computerized information series (Fisheries), ICLARM Contribution, FAO, Rome, 1997, p. 262.

D Pauly and ML Soriano. Some Practical Extensions to Beverton and Holt’s Relative Yield per Recruit Model. In: JL Maclean, LB Dizon and LV Hosillos (Eds.). The first Asian Fisheries Forum. Asian Fisheries Society, Manila, 1986, p. 491-5.

C Ioannidou and JR O’Hanley. The importance of spatiotemporal fish population dynamics in barrier mitigation planning. Biol. Conserv. 2019; 231, 67-76.

SE Tanner, AR Vieira, RP Vasconcelos, S Dores, M Azevedo, HN Cabral and JR Morrongiello. Regional climate, primary productivity and fish biomass drive growth variation and population resilience in a small pelagic fish. Ecol. Indic. 2019; 103, 530-41.

KR Allen. Some observations on the biology of the trout (Salmo trutta) in Windermere. J. Anim. Ecol. 1938; 7, 333-49.

KD Carlander. Handbook of freshwater fishery biology. Vol. I. Iowa State University Press, Iova, 1969, p. 752.

SK Chakraborty. Length-weight relationship and biometric study on three species of sciaenids from Bombay waters. J. Indian Fish. Assoc. 1992; 22, 41-8.

XH Wang, YS Qiu, GP Zhu, FY Du, DR Sun and SL Huang. Length-weight relationships of 69 fishes in the Beibu Gulf, northern South China sea. J. Appl. Ichthyol. 2011; 27, 959-61.

MK Hena, MH Idris, AH Rajaee and MAM Siddique. Length-weight relationships of three fish species from a tropical mangrove estuary of Sarawak, Malaysia. J. Appl. Ichthyol. 2017; 33, 858-60.

WS Chu JP Wang, YY Hou, YT Ueng and PH Chu. Length-weight relationships for fishes off the southwestern coast of Taiwan. Afr. J. Biotechnol. 2011; 10, 3945-50.

ES Haroun, K Akel and PK Karachle. The marine ichthyofauna of Egypt. Egypt. J. Aquat. Biol. 2017; 21, 81-116.

Q Ma, S Tian, D Han, K Richard, C Gaoab and W Liu. Growth and maturity heterogeneity of three croaker species in the East China sea. Reg. Stud. Mar. Sci. 2021; 41, 101483.

C Gao, Q Ma, S Tian, X Dai and R Kindong. Growth mortality and yield per recruitment of Small Yellow Croaker in offshore water of southern Zhejiang. Shuichan Xuebao 2019; 26, 925-37.

AT Ahmad, MM Isa, MS Ismail and S Yusof. Status of demersal fishery resources of Malaysia. In: Proceedings of the 67th WorldFish Center Conference. WorldFish Center, 2003, p. 83-135.

GT Silvestre and LR Garces. Population parameters and exploitation rate of demersal fishes in Brunei Darussalam (1989-1990). Fish. Res. 2004; 69, 73-90.

G Maheswarudu, GS Rao, P Rohit, P Laxmilatha, S Gosh and M Menon. Marine fisheries of Andhra Pradesh: A decadal analysis. Indian J. Fish. 2013; 60, 27-33.

M Phettongkam and W Thasananulkit. The biology of Sciaena russelli (Cuvier et Valenciennes) in the inner Gulf of Thailand. In: Proceedings of the 3rd Symposium on Marine Fisheries. Bangkok, Thailand, 1972, p. 1-18.

JA Gulland. The Fish Resources of the Ocean. West Byfleet, Survey, Fishing News, FAO, 1971, p. 225.




How to Cite

SAWUSDEE, A. ., & RATTANARAT, J. . (2021). Population Dynamics of the Caroun Croaker Johnius carouna (Cuvier, 1830) in Coastal Fishing Ground in the Middle Gulf of Thailand . Walailak Journal of Science and Technology (WJST), 18(17), Article 13709 (8 pages). https://doi.org/10.48048/wjst.2021.13709