japonica Kagawa Prefectural Fisheries Experimental Station, Takamatsu, Kagawa , Japan 2

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1 Aquacult. Sci , 2 Seasonal changes in species composition of a demersal fish community in the shallow waters near a sandy beach in eastern Hiuchi-nada, central Seto Inland Sea, Japan Masayuki YAMAMOTO 1, and Jun SHOJI 2 Abstract: To examine seasonal changes in composition of dominant species in demersal fish community on a sandy beach in the Seto Inland Sea, we conducted a beam trawl survey between May 22 and September 25. A total of 14,13 individuals, belonging to more than 39 species, were collected at m depths (measured at each tow). The tidal variation was approximately 3 m at this beach, the water temperature ranged from 9. (February) to 3.3 C (August), and the salinity from 28.7 (July) to 33.7 (March). The mean number of fish species per tow ranged from 1.25 (January) to 9.5 (June) and fish abundance (number of individuals /1 m 2 ) from.6 (January) to 13.5 (October). Both species number and the abundance increased from spring to summer and decreased from autumn to winter with a significant positive correlation with water temperature each month. The numerically dominant species were Favonigobius gymnauchen (62.6 ), Tarphops oligolepis (11.4 ), Sillago japonica (6.7 ), unidentified Repomucenus (6.4 ), Heteromycteris japonica (3.3 ) and Paralichthys olivaceus (3.2 ). Key words: Goby; Flatfish; Ichthyofauna; Habitat 211 Pleuronectes platessa Psetta maxima Chanos chanos McLachlan and Brown 26 Sarpa salpa Pomadasys spp. Liza spp. Lasiak Suda et al Acanthopagrus schlegelii Acanthopagrus latus 1998 Sillago japonica Kagawa Prefectural Fisheries Experimental Station, Takamatsu, Kagawa , Japan 2 Takehara Marine Laboratory, Hiroshima University, Takehara, Hiroshima , Japan Corresponding author : , ky554@pref.kagawa.lg.jp M. Yamamoto

2 198 Paralichthys olivaceus Marsupenaeus japonicus 27 Pleuronectes yokohamae Kareius bicoloratus 1975 Yamamoto et al. 24a, 24b Heteromycteris japonica Yamamoto and Katayama m Tarphops oligolepis Favonigobius gymnauchen 21 Yamamoto et al. 24a Yamamoto and Tominaga m 1 m N E 37 Fig. 1 2 m.3 m 2.1 mm.5 1. kt 3 m 2 m Fig. 1. Map showing sampling area (Ohama beach: closed star) off the sandy beach at m depths in Hiuchi-nada, central Seto Inland Sea, where periodically collections of fish were conducted from May 22 to September m 1 3 m 8 m Yamamoto et al. 24a 1 SK-25WP SATO DIGI-AUTO MODEL.3-G mm Inimicus japonicus Parajulis poecileptera 25 mm 213

3 1 m 2 1 Repomucenus curvicornis Repomucenus beniteguri Repomucenus ornatipinnis ,13 Table Rudarius ercodes 1.9 Table 1. Fish collected on shallow waters of the sandy beach in the central Seto Inland Sea from May 22 to September 25 Family Species No. of ind. Total length (mm) Month of capture Total Rank Mean SD Range Clupeidae Konosirus punctatus 9 May, June Engraulidae Engraulis japonica 6 May, June, Aug., Nov Synodontidae Saurida elongata 1 July 5.8 Syngnathidae Syngnathus schlegeli 7 May-July, Sep Hippocampus mohnikei 4 June, July Sebastidae Sebastes cheni 6 Jan.-May Tetrarogidae Hypodytes rubripinnis 33 May-Sep., Dec Synanceiidae Inimicus japonicus 1 Dec Platycephalidae Platycephalus spp May-Sep Lateolabracidae Lateolabrax japonicus 6 Mar., Apr Haemulidae Plectorhynchus cinctus 4 June, Sep Sparidae Acanthopagrus latus 2 Nov Pagrus major 76 1 May-July Sillaginidae Sillago japonica June-Oct Pomacentridae Chromis notatus notatus 3 July Labridae Parajulis poecileptera 9 June-Oct Halichoeres tenuispinis 1 Aug Hexagrammidae Hexagrammos agrammus 1 May 67.5 Cottidae Pseudoblennius cottoides 1 Feb., Apr.-June Ammodytidae Ammodytes personatus 7 Mar., Apr Blenniidae Parablennius yatabei 3 June, July, Nov Callionymidae Repomucenus curvicornis 6 Aug., Nov Repomucenus beniteguri Jan.-Dec Repomucenus ornatipinnis 1 Aug Unidentified Repomucenus 9 4 Jan., Feb., Apr.-Dec Gobiidae Sagamia geneionema 1 Oct. 7.5 Tridentiger trigonocephalus 9 June-Aug., Nov Favonigobius gymnauchen 8,778 1 Jan.-Dec Gymnogobius heptacanthus 1 June 26.6 Gymnogobius breunigii 1 July 29.6 Paralichthyidae Paralichthys olivaceus Apr.-Sep Hatchery-reared P. olivaceus 2 June, July Tarphops oligolepis 1,597 2 Jan.-Dec Pleuronectidae Kareius bicoloratus 25 Mar., Apr Pleuronectes yokohamae 26 Mar.-June Soleidae Heteromycteris japonica Apr.-Dec Cynoglossidae Cynoglossus abbreviatus 1 Sep Monacanthidae Rudarius ercodes Feb., Apr.-Dec Thamnaconus modestus 2 July Stephanolepis cirrhifer 1 Aug Tetraodontidae Takifugu niphobles 5 Feb.-Apr., June

4 1.6 Platycephalus spp. 1. Pagrus major mm mm mm Fig. 2A 1 SD Fig. 2B 1 r s =.76, P <.1 SD.6.5 /1 m /1 m r s =.75, P <.1 1 Fig Fig mm mm mm mm mm mm mm WT ( C) No. of species (tow -1 ) (A) (B) Salinity Fish abundance (no. 1 m -2 ) M J J A S O N D J FM AM J J A S O N D J FM AM J J A S O N D J FM AM J J A S Fig. 2. Seasonal changes in (A) water temperature (closed circle: WT) and salinity (open circle) and (B) number of fish species (closed triangle) and fish abundance (open triangle) on shallow waters of the sandy beach from May 22 and September 25.

5 mm mm mm mm mm Total length (mm) Composi on (%) J F M A M J J A S O N D Month Sj Rs Fg Po To Kb Py Hj Re Ot Fig. 3. Seasonal changes in numerically dominant fish species from May 22 to September 25. Sj: Sillago japonica; Rs: Repomucenus spp.; Fg: Favonigobius gymnauchen; Po: Paralichthys olivaceus; To: Tarphops oligolepis; Kb: Kareius bicoloratus; Py: Pleuronectes yokohamae; Hj: Heteromycteris japonica; Re: Rudarius ercodes; Ot: others. Platycephalus spp JPagrus F Mmajor A M J J A S O N D Sillago J F Mjaponica A M J J A S O N D J F M A M J J A S O N D Repomucenus J F M A Mspp. J J A S O N D Favonigobius gymnauchen Tarphops J F M oligolepis A M J J A S O N D JKareius F Mbicoloratus A M J J A S O N D JPleuronectes F M A yokohamae M J J A S O N D J F M A M J J A S O N D Month Fig. 4. Seasonal changes in total length of the eight important fish species. Closed triangles, vertical bars, open circles an closed circles indicate mean total length, standard deviation, maximum total length and minimum total length, respectively. Numerals above each symbol indicates the mean fish abundance (no. 1 m -2 ) in each month mm mm mm mm 2.7 mm 13.4 mm 3. mm mm mm mm mm mm mm 18.6 mm 8.8 mm 13.4 mm mm mm mm mm mm 2.3 /1 m /1 m mm mm 3.5 /1 m

6 1 m Gymnogobius breunigii Chaenogobius annularis Konosirus punctatus Hypoatherina valenciennei Takifugu niphobles Plecoglossus altivelis altivelis m m 2 5 m Yamamoto et al 24a 1 m m m Kamimura and Shoji 29 Mohri et al cm Yamamoto and Tominaga Yamamoto and Tominaga mm Kamisaka et al Platycephalus sp. 2 Platycephalus sp mm 3 mm mm

7 3 mm 3 mm 1 m mm mm.3.59 /1 m mm /1 m Sr:Ca Yamashita et al mm /m Yamamoto et al. 24a, 24b Yamamoto and Katayama 213 Yamamoto and Tominaga 25, m , / /1 m [Arayama, K., H. Imai, H. Kohno and K. Fujita (23) Early life history of Japanese whititing Sillago japonica occurring in the surf zone of sandy beaches, Tateyama Bay central Japan. Nippon Suisan Gakkaishi, 69, (in Japanese with English [Azuma, K., H. Hiraga, N. Hiraki and N. Taniguchi (22) Distribution of Ayu, Plecoglossus altivelis larvae in surf zones in the central area of Wakayama Prefecture, Japan. Suisanzoshoku, 5, 9-15 (in Japanese with English 1973

8 Fujimoto, T., N. Matsumoto and H. Shinooka (1973) Ecology of juvenile stone flounder in the estuarine waters, central Seto Inland Sea. Saibai Giken, 2, (in Japanese) [Hibino, M., T. Ohta, I. Kinoshita and M. Tanaka (22) Fish larvae and juveniles occurring in the littoral zone of a tidal flat, in the bottom of Ariake Bay. Japan. J. Ichthyol., 49, (in Japanese with English [Hirai, K., Y. Kamimura, Y. Iwamoto, T. Morita and J. Shoji (29) A quantitative comparison of fish assemblage between a macroalgae bed and an adjoining sandy beach in the central Seto Inland Sea. J. Grad. Sch. Biosp. Sci., 48, 1-7 (in Japanese).] [Horita, K. (2) Seed production of a marine teleost, Platycephalus sp. Bull. Toyama Pref. Res. Inst. 12, 5-12 (in Japanese with English [Iwamoto, Y., K. Mishiro, T. Morita, Y. Kamimura, K. Mizuno, T. Umino and J. Shoji (29) Larval and juvenile fishes collected at sandy beaches of upper Hiroshima Bay, Seto Inland Sea. Suisanzoshoku, 57, (in Japanese with English pp Kamimura, Y. and J. Shoji (29) Seasonal changes in the fish assemblage in a mixed vegetation area of seagrass and macroalgae in the central Seto Inland Sea. Aquaculture Sci., 57, Kamisaka, Y., M. Tagawa and M. Tanaka (1999) Semi-annual reproductive cycle of a small flounder Tarphops oligolepis in Wakasa Bay. Fish Sci., 65, Lasiak, T. A. (1984) Structural aspects of the surf-zone fish assemblage at King s Beach, Algoa Bay, South Africa: long-term fluctuations. Estuar. Coast. Shelf Sci., 18, McLachlan, A. and A. C. Brown (26) The ecology of sandy shores, second edition. Elsevier, Amsterdam, 373pp. Mohri, K., Y Kamimura, K. Mizuno, H. Kinoshita, S. Toshito and J. Shoji (213) Seasonal changes in the fish assemblage in a seagrass bed in the central Seto Inland Sea. Aquaculture Sci., 61, [Morikawa, A., H. Kawakami and T. Takita (22) Age and growth of two Plathcephalid species in Arikake sound, southern Japan. Suisanzoshoku, 5, (in Japanese with English pp [Nakabo, T. ed. (213) Fishes of Japan with pictorial keys to the species, third edition. Tokai Univ. Press., Kanagawa, 2428pp. (in Japanese).] [Nakamura, R. (1996) Fisheries of flat fishes and enhancement of their stocks with artificial fingerlings in Tokyo Bay. Bull. Japan Sco. Fish. Oceangr., 6, (in Japanese). ] [Nakane, Y., Y. Suda, J. Ohtomi, Y. Hayakawa and T. Murai (25) Nearshore ichthyofauna in the intermediate sandy beach, Fukiagehama beach, Kagoshima Prefecture, Japan. J. National Fish. Univ., 53, 57-7 (in Japanese with English [Noichi, T., M. Kusano, D. Ueki and T. Senta (1993) Feeding habit of fishes eating settled larval and juvenile Japanese flounder (Paralichthys olivaceus) at Yanagihama beach, Nagasaki Prefecture. Bull. Fac. Fish. Nagasaki Univ., 73, 1-6 (in Japanese with English pp [Okiyama, M. ed. (1998) An atlas of the early stage fishes in Japan. Tokai Univ. Press., Tokyo, 1154pp. (in Japanese).] [Omi, H., T. Kusakabe and Y. Nabeshima (23) Fishes occurring on artificial beach of southern coast in Osaka Bay. Bull. Osaka Pref. Fish. Exp. Stn., 13, 57-7 (in Japanese).] [Otake, T. (26) Early life history of ayu in coastal water. Bull. Fish. Res. Agency, supplement 5, (in Japanese with English pp [Senta, T. and I. Kinoshita eds. (1998) Biology of larval and juvenile fishes in sandy beaches. Kouseisha-kouseikaku, Tokyo, 136pp. (in Japanese).] 27

9 19pp pp [Shoji, J. and M. Tanaka (22) Larval and juvenile fishes collected in the surf zones of Hiuchi-nada, the central Seto Inland Sea. Suisanzoshoku, 5, (in Japanese with English [Shoji, J., T. Maehara, A. Takechi, T. Tanigawa, N. Murata and M. Tanaka (22) Larval fishes collected in Hiuchi-nada, the central Seto Inland Sea, Japan. Nippon Suisan Gakkaishi, 68, (in Japanese with English pp [Shoji, J., M. Hori and Y. Yamashita eds. (211) Ecosystem serveces of coastal waters, benefit of the sea and it sustainable use. Kouseisha-kouseikaku, Tokyo, 15pp. (in Japanese).] Suda, Y., T. Inoue and H. Uchida (22) Fish communities in the surf zone of a protected sandy beach at Doigahama, Yamaguchi Prefecture, Japan. Estuar. Coast. Shelf Sci., 55, pp [Tanaka, M. and I. Kinoshita eds. (22) Temperate bass and biodiversity. Kouseishakouseikaku, Tokyo, 155pp. (in Japanese).] [Tomiyama, A. and R. Jinnouchi (1977) Fish occurring in the flooded zone of a tidal flat off Yamaguchi Prefecture. Bull Yamaguchi Pref. Naikai Fish. Exp. Stn., 6, 1-35 (in Japanese).] Yamamoto, M. and S. Katayama (213) Age, growth and spawning period of bamboo sole Heteromycteris japonica in the Seto Inland Sea, Japan. Aquaculture Sci. 61, m Yamamoto, M. and H. Makino (22) Estimation of catch efficiency of the two-meter beam trawl for juvenile Japanese flounder in the Hiuchi-nada Sea. Saibai Giken, 3, (in Japanese with English abstract). Yamamoto, M. and O. Tominaga (25) Feeding ecology of dominant demersal fish species, Favonigobius gymnauchen, Repomucenus spp. and Tarphops oligolepis, at sandy beach where larval Japanese flounder settle in the Seto Inland Sea, Japan. Fish. Sci., 7, Yamamoto, M. and O. Tominaga (214) Prey availability and daily growth rate of juvenile Japanese flounder Paralichthys olivaceus at a sandy beach in the central Seto Inland Sea, Japan. Fish. Sci., 8, Yamamoto, M., H. Makino, T. Kagawa and O. Tominaga (24a) Occurrence and distribution of larval and juvenile Japanese flounder Paralichthys olivaceus at Ohama Beach in Hiuchi-Nada, the central Seto Inland Sea, Japan. Fish. Sci., 7, Yamamoto, M., H. Makino, J. Kobayashi and O. Tominaga (24b) Food organisms and feeding habits of larval and juvenile Japanese flounder Paralichthys olivaceus at Ohama Beach in Hiuchi-Nada, the central Seto Inland Sea, Japan. Fish. Sci., 7, Yamashita, Y., T. Otake and H. Yamada (2) Relative contributions from exposed inshore and estuarine nursery grounds to the recruitment of stone flounder, Platichythys bicloratus, estimated using otolith Sr:Ca rations. Fish. Oceanogr., 9,