کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2423777 1552930 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of stocking density, algal density, and temperature on growth and survival of larvae of the basket cockle, Clinocardium nuttallii
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم آبزیان
پیش نمایش صفحه اول مقاله
Effects of stocking density, algal density, and temperature on growth and survival of larvae of the basket cockle, Clinocardium nuttallii
چکیده انگلیسی

This study determined optimal rearing conditions – stocking density, algal density, and temperature – for hatchery production of the basket cockle, Clinocardium nuttallii, from newly-hatched D-larvae to pediveligers using static rearing systems and discontinuous feeding. The combined effect of initial stocking density (2, 4, and 8 larvae ml− 1) and algal density (10, 25, and 50 × 103 cells ml− 1) on larval growth and survival was examined using a bi-algal diet of Chaetoceros muelleri (CM) and Isochrysis sp. (Tahitian strain, TISO). The effect of algal density (0, 2.5, 5, 10, 20, 40, 60, and 80 × 103 cells ml− 1) as a single factor was assessed using a single-algal diet of TISO and a fixed stocking density (2 larvae ml− 1) held constant throughout the experiment. The effect of temperature (5.9, 10.2, 14.2, 18.2, 21.9, and 26.3 °C) on larval growth and survival was also evaluated. The results showed that, when feeding the bi-algal diet of CM and TISO, an initial stocking density of 2 larvae ml− 1 combined with an algal density of 25 or 50 × 103 cells ml− 1 or an initial stocking density of 4 larvae ml− 1 combined with an algal density of 50 × 103 cells ml− 1 were optimal conditions for larval growth, and survival rate was significantly better in the treatment with 4 larvae ml− 1. When feeding the single-algal diet of TISO, optimal larval growth was observed at algal densities of ≥ 40 × 103 cells ml− 1. These optimal rearing conditions translated into minimum food rations of 18.4 and 20 × 103 algal cells larva− 1 day− 1 using the bi-algal and single-algal diets, respectively, to support maximum larval growth from newly-hatched D-larvae to pediveligers. Within the tested temperature range of 5.9 to 21.9 °C, larval growth was greater with increasing temperature but survival to settlement stage was not affected by temperature. The larvae failed to survive at the highest tested temperature of 26.3 °C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 299, Issues 1–4, February 2010, Pages 99–105
نویسندگان
, , , ,