Ju, P.-L. et al. (2016). Age, growth, mortality and population structure of silver croaker Pennahia argentata (Houttuyn, 1782) and red bigeye Priacanthus macracanthus Cuvier, 1829 in the north-central Taiwan Strait. J. Appl. Ichthyol., 32: 652-660.
Yamaguchi. Et al. (2006). Reproductive cycle, sexual maturity and diel-reproductive periodicity of white croaker, Pennahia argentata (Sciaenidae), in Ariake Sound, Japan. Fisheries Research (82): 95–100.
Fisheries biology of Pennahia argentata in the north-central Taiwan Strait and in Ariake Sound Japan was examined based on samples collected from two different area and objective studies. In the north-central Taiwan Strait between March-November 2006, a total of 994 specimens were collected from single trawler fishery. Fish size ranged from 58 to 267 mm in length and 5 to 410 g in total wet weight. Ages was determined or back-calculated between 0 to 5 years. The minimum size at first maturity for female 119 mm and 115 mm for male. Compare with previous studies, P. argentata has decreased in recent decades, indicating that the populations were younger, smaller and earlier in sexual maturity. Meanwhile, Mortality coefficients were higher to be estimated total mortality (Z) was 1.7410, nature mortality (M) was 0.8690, fishing mortality (F) was 0.8720, and exploitation ratio (E) was 0.5009 indicated that fish have been overfishing. In Ariake Sound between September 2001 and Augustus 2002, a total of 421 females and between 14 July – 4 Augustus 2004, a total of 830 mature female were collected. The reproductive biology of P. argentata was studied by measurement of gonadosomatic indices (GSI) and histological examination of ovaries. Ovaries were classified into five maturity stages: (i) immature/resting; (ii) developing; (iii) maturing; (iv) ripe/spawning; (v) spent. The spawning season lasts from April to September with peak activity from May to August. Age at sexual maturity was assumed to be 1 year. The diel-changes in the proportion of females with postovulatory follicles and oocytes at maturation stage, most females spawned between 19:00 and 21:30 h.
Keywords: Fishery biology, Pennahia argentata, the north-central Taiwan Strait, Ariake Sound