MMpd = Siren intermedia growth in mass, calculated as increase in g per day, of males over the four seasons. Significant differences in growth occurred between winter and summer, spring and summer, and summer and autumn. F₃ = 4.25; P = 0.0071. MSpd = Growth in SVL, calculated as increase in mm per day, of males over the four seasons. Significant differences in growth occurred between winter and summer and summer and autumn. F₃ = 4.58; P = 0.0047. FMpd = Growth in mass, calculated as increase in grams per day, of females over the four seasons. Significant differences in growth occurred between winter and spring, winter and summer, winter and autumn, spring and summer, and summer and autumn. F₃ =20.98; P < 0.0001. FSpd = Growth in SVL, calculated as increase in mm per day, of females over the four seasons. Significant differences in growth occurred between winter and spring, winter and summer, winter and autumn, spring and summer, and summer and autumn. F₃ = 17.4; P < 0.0001. MFMpd = Growth in mass, calculated as increase in g per day, of males and females combined over the four seasons. Significant differences in growth occurred between winter and spring, winter and summer, spring and summer, and summer and autumn. F₃ =17.51; P < 0.0001. MFSpd = Growth in SVL, calculated as increase in mm per day, of males and females combined over the four seasons. Significant differences in growth occurred between winter and spring, winter and summer, spring and summer, and summer and autumn. F₃ = 17.55; P < 0.0001.