Age, growth, and maturity of the Indian flathead Platycephalus indicus in the waters around Okinawa-jima Island, Japan

Age, growth and mortality of the Bartail Flathead (Platycephalus indicus) in Bardawil lagoon, North Sinai, Egypt.

“…The relationship equation showed a positive allometric where b > 3 (b = 3.3402). This result agrees with (Bawazeer, 1989;Alberto et al, 2003;Hashemi et al, 2012;Mohammadikia et al, 2012;Mohammadikia et al, 2013;Sabet, 2015;Adeleh et al, 2015;Samir and Akel, 2016;Akita and Tachihara, 2019;Hajializadeh et al, 2019). All these researchers found that, the value of (b) of bartail flathead P. indicus was positive allometric (b > 3) in different places.…”

“…The φ in this study was higher than that estimated by (Bawazeer, 1989) in Kuwait waters where he found that, the φ for the same species equals 2.91, and also φ was higher than (Hashemi et al, 2014) in Iran, they found φ equals 1.19. The φ in this study was less than (Akita and Tachihara, 2019) in Japan where they found that, the φ for the same species equals 3.26 (Table 3). Thus, it could be reported that the environmental condition of Bardawil lagoon is suitable for the growth of P. indicus under study.…”

Reproductive characteristics of Ratabulus diversidens and Ambiserrula jugosa (Pisces: Platycephalidae) from continental shelf waters of south-eastern Australia

“…Nevertheless, some species are protandrous hermaphrodites ( Inegocia meerdervoorti : Okada, 1968; Onigocia macrolepis : Fujii, 1970; Inegocia japonica : Fujii, 1971; Shinomiya et al ., 2003; Thysanophrys celebica : Sunobe et al ., 2016). The observed skewed sex ratios favouring females particularly in larger length groups of both species was most likely a result of sexually dimorphic growth trajectories and greater maximum lengths attained by females (Barnes et al ., 2011 b ), as observed in other gonochoristic platycephalids (Gray & Barnes, 2015; Sabrah et al ., 2015; Coulson et al ., 2017; Akita & Tachihara, 2019).…”

“…The spring onset of increasing water temperatures and photoperiod could potentially trigger initial reproductive development and spawning in these species. This prolonged (non-winter) timing of spawning is concordant with other platycephalids (Bawazeer, 1989; Hyndes et al ., 1992; Gray & Barnes, 2015; Coulson et al ., 2017; Akita & Tachihara, 2019) and several other regional teleost species (Sillaginidae: Gray et al ., 2014; Gerreidae: Gray, 2019).…”

“…Flathead are typically dorso-ventrally compressed, well camouflaged, benthic ambush predators morphologically adapted at burying or remaining partially buried in unconsolidated soft sediment environments across estuarine and continental shelf and upper slope waters (Douglas & Lanzing, 1981; Barnes et al ., 2011 a ; Coulson et al ., 2015). Many flathead species feature in commercial, recreational and traditional fisheries (Bawazeer, 1989; Gray et al ., 2002; Sabrah et al ., 2015; Schnierer & Egan, 2016; Gray & Kennelly, 2018; Akita & Tachihara, 2019). Consequently, the life history characteristics of several harvested species have been studied, and inter-specific similarities and differences in species demographic characteristics within the family have been identified (Barnes et al ., 2011 b ; Coulson et al ., 2017).…”