Age, growth, and reproductive biology of the Waigieu seaperch Psammoperca waigiensis (Perciformes: Latidae) around Okinawa Island, Japan |
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Authors: | Tamaki Shimose Katsunori Tachihara |
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Institution: | (1) Laboratory of Fisheries Biology & Coral Reef Studies, Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan |
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Abstract: | Age, growth, and reproductive biology of the Waigieu seaperch Psammoperca waigiensis were studied using 291 specimens obtained around Okinawa Island, Japan. Otolith opaque zones that formed every year correlated
with spawning activity and were thought to be annual rings. Growth of this species was rapid during the first 2 years, reaching
186.2–270.3 mm in standard length (SL). Females (196.6–334.0 mm SL) were larger than males (186.2–288.6 mm SL), caused by
differential growth between sexes, which started before 2 years of age. Most of the specimens were 1–11 years old and accounted
for 96% in total. Spawning season was estimated to be from April to October by gonadosomatic index (GSI) and histological
observation. The smallest mature female and male were 217.0 mm SL (2 years) and 206.0 mm SL (2 years), respectively. After
recruitment in rocky areas up to about 200.0 mm SL and 2 years of age, Psammoperca waigiensis were then found to soon mature. |
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Keywords: | Psammoperca waigiensis Latidae Age Growth Reproductive biology |
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