Voluntary Spawning, Early Development, and Completion of the Life Cycle of Spotted Sand Bass Paralabrax maculatofasciatus in the Laboratory |
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| Authors: | Sergio F.,Martí nez-Diaz ,Rodolfo,Martí nez-Pecero ,Martin O.,Rosales-Velá zquez Reyna,Alvarado-Castillo Horacio,Perez-Espana John W.,Tucker,Jr. |
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| Affiliation: | Experimental Biology Laboratory, Centro Interdisciplinario de Ciencias Marinas Instituto Politécnico Nacional, Playa el Conchalito sn. C.P. 23000, Apdo. Postal 592, La Paz Baja California Sur, México;Age and Growth Laboratory, Centro Interdisciplinario de Ciencias Marinas Instituto Politécnico Nacional, Playa el Conchalito sn. C.P. 23000, Apdo. Postal 592, La Paz Baja California Sur, México;Centro de Ecologíc Costera, Gómez Farias No. 82, San Patricio-Melaque, C.P. 48980, Jalisco, México;Division of Marine Science, Harbor Branch Oceanographic Institution, 5600 North U.S. One, Fort Pierce, Florida 34946 USA |
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| Abstract: | Abstract.— Spawning behavior and development of spotted sand bass Paralabrax maculatofasciatus were studied in the laboratory. Captive fish (15–20 cm standard length) spawned in 100-L aquaria at 24 C and 35 ppt salinity with a controlled photoperiod (13 h light: 11 h dark). Distinct courtship coloration and displays were observed. Courtship began near noon and continued all afternoon. Spawning occurred toward the surface during late afternoon. Development from fertilization to 3 d after hatching is described. Hatching occurred in 24–25 h at 24 C. Larvae were reared in 100-L aquaria with microalgae, rotifers, and Artemia . First feeding occurred 3 d after hatching, and 5.3% survival was obtained at 17 d (4.1-mm mean notochord length, 1.7–5.5 mm range). On a diet of minced clams and fish, first maturity was reached at 7.5 mo (19.5 g mean weight, 8.3–37.9 g range and 90 mm mean standard length, 66–116 mm range). |
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