Observations on the Territorial Behaviour of Japanese Majarra, Gerres Oyena (Forsskal), in the Vicinity of Seto

Reproductive biology of the Japanese silver-biddy, Gerres equulus, in western Kyushu, Japan

“…The Japanese silver-biddy Gerres equulus (Temminck and Schlegel) is distributed from southern Korea and southern Japan, except in the Ryukyu Islands, to just north of Sado Island, Niigata, Sea of Japan, and Boso Peninsula, Chiba and the Pacific Coast of Honshu Island (Iwatsuki et al, 1999;Nakabo, 2000). This fish is one of the most common shore fish in the costal waters of southern Japan, where it supports a commercially important local fishery and is fished mainly by set gill net (Usuki, 1976;Iqbal et al, 2006). Some biological studies have been conducted on G. equulus for developing effective management measures due to its importance in the fishery.…”

“…Some biological studies have been conducted on G. equulus for developing effective management measures due to its importance in the fishery. Usuki (1976) studied its territorial behaviour, Kinoshita (1984) reported its early life history, Horinouchi and Sano (2000) examined its feeding habits, and Iqbal et al (2006) observed its age and growth using otoliths. However, until now there has been no study of the reproductive biology of this species.…”

Age and growth of the Japanese silver-biddy, Gerres equulus, in western Kyushu, Japan

“…A number of gerrieds are known to spawn throughout the year and then recruit into nursery grounds, spending part of their life cycles in estuaries or inshore coastal waters (Araujo and Santos, 1999). The Japanese silver-biddy is one of the most common shore fish in coastal waters with rocky or sandy floors of a simple topography (Usuki, 1976). This species is also commercially important for local fisheries in southern Japan and is fished mainly by set gill nets.…”

Length-weight relationships and condition factor of the Japanese silver-biddy,Gerres equulus, in the Yatsushiro Sea, western Kyushu, Japan

“…Gerres equulus Temminck & Schlegel, 1844 belongs to the family Gerreidae, and is known as the Japanese silver‐biddy (Iwatsuki et al., 1999; Nakabo, 2000). This species is one of the most popular shore fishes and commonly inhabits shore waters over sandy bottoms (Usuki, 1976; Iwatsuki et al., 1999). It is also of commercial importance for the local fishery in the coastal waters of southern Japan (Iqbal et al., 2006).…”

“…G. equulus is distributed in southern Korea and southern Japan, except the Ryukyu Islands, to just north of Sado Island, Niigata, Sea of Japan and Chiba, Boso Peninsula and the Pacific coast of Honshu Island (Iwatsuki et al., 1999; Nakabo, 2000). Studies have been conducted on its early life history (Kinoshita, 1984), age and growth (Iqbal et al., 2006), reproductive biology (Iqbal et al., 2007), batch fecundity (Iqbal et al., 2008), territorial behaviour (Usuki, 1976), taxonomic complexity (Iwatsuki et al., 1999), and feeding habits (Horinouchi and Sano, 2000), but there are no published reports on G. equulus length–weight relationships (LWRs) and condition factor.…”