Effect of temperature on hatching and growth of cuban gar (Atractosteus tristoechus) larvae
作者： Yamilé Comabella , Tsai García-Galano , Javier Canabal , Andrés Hurtado
DOI: 10.19136/ERA.A1N1.3
关键词:
摘要: Hatching success, growth, development and survival of Cuban gar ( Atractosteus tristoechus ) larvae were examined at different temperatures (26, 28 30 o C) up to 18 days after hatching (DAH). The time was inversely related the incubation temperature (87, 100 111 h). Larval significantly lower C (50.3 %), coinciding with highest larval mortality (30.2 %). Growth rates 1.75 mmd -1 -10.4 % d 26 C,1.30 mm -10.2 1.40 -10 C. Three similar critical periods identified: 0-6, 7-11 12-18 DAH. During first period, a increase in weight significant total length occurred, mainly C, indicating more efficient reconversion yolk reserves. Later, growth equally slow, corresponding transitional period from endogenous exogenous feeding, physiologic pattern regardless temperature. Weight increased during last greatest contrast lowest gain inflexion points many morphometric characters developmental stages accelerated increasing Although it impossible determine optimal temperature, evident that favored success growth.
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