Growth of Weakfish Hatchery-produced Juveniles, Cynoscion Squamipinnis (Perciformes: Sciaenidae) in Captivity
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Nhiều tác giả: | , , , , |
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Định dạng: | artículo original |
Trạng thái: | Versión publicada |
Ngày xuất bản: | 2016 |
Miêu tả: | Juveniles of weakfish, Cynoscion squamipinnis hatchery-produced from spontaneously spawning in captivity, were grown during 355 days at Estación de Biología Marina Juan Bertoglia Richards (Biology Marine Station John Bertoglia Richards) in Costa Rica. One hundred fifty two fish were stocked in tanks of four tonnes to a total biomass of 82 g m-3, and feeding with a diet of 50% protein, 17.5% carbohydrate, 11.8% lipids, 16% ash and 5% humidity. Dissolved oxygen was 7.12±1.13 mg L-1 (5.68 - 9.13 mg L- 1), salinity of 31.92±1.65 ups (29.84 - 34.71 ups), and temperature of 27.54±0.63°C (26.50 - 28.60°C), similar to the Gulf of Nicoya conditions. Initial mean weight was 3.77(1.15 g (0.3 - 6.2 g). Final mean body weight was 132.60(32.96 g (78.5 - 219.3 g). The growth (G) was 128.83 g, with a growth rate (GR) of 0.36 g d-1, and Specific Growth Rate (SGR) of 1.00 % BW d-1. The Relative Growth Rate (RGR) was 0.0053 g g-1 d-1. The feed conversion (FCA) during the period was 1.8±0.4. The weakfish had a lower growth parameters than other croaker species, the fish showed a calm behavior, accepted the pelletized diet, and they were easy to handle, characteristics which confirm that weakfish as potential candidate for commercial mariculture. |
Quốc gia: | Portal de Revistas UNA |
Tổ chức giáo dục: | Universidad Nacional de Costa Rica |
Repositorio: | Portal de Revistas UNA |
Ngôn ngữ: | Español |
OAI Identifier: | oai:ojs.www.una.ac.cr:article/7757 |
Truy cập trực tuyến: | https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/7757 |
Access Level: | acceso abierto |
Từ khóa: | Marine biology aquaculture growth sea fish weakfish Cynoscion squamipinnis. Biología marina acuicultura crecimiento pez marino corvina aguada |