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首页> 外文期刊>Indian Journal of Fisheries >Evaluation of yield characteristics from short term farming practice of Litopenaeus vannamei (Boone, 1931)
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Evaluation of yield characteristics from short term farming practice of Litopenaeus vannamei (Boone, 1931)

机译：南美白对虾的短期养殖实践对产量特征的评估（Boone，1931年）

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摘要

Experimental farming of Litopenaeus vannamei was conducted at a lower stocking rate for two different culture durations in order to assess the variations in yield characteristics. Specific pathogen free (SPF) post-larvae of L. vannamei (PL 10) were stocked in six 0.08 ha ponds at a stocking rate of 32 nos. m(-2). The shrimps were harvested after two culture durations viz., 65 and 75 days of culture (DOC). Longer duration of farming (75 DOC) showed significantly higher production (6 t ha(-1)), larger size (13.2 +/- 0.02 cm) and higher weight gain (18.94 +/- 0.08 g) at harvest than with the lower duration (65 DOC) farming which recorded a production of 4.3 t ha(-1) with harvest size of 11.86 +/- 0.14 cm and weight gain of 14.28 +/- 0.11 g at harvest. However, specific growth rate, SGR (%) day(-1) indicated that, as the culture duration increased the growth rate reduced. Feed conversion ratio (FCR) was not significantly different among the treatments. It was slightly lesser than one for both the treatments which may be attributed to the influence of the productivity of the ponds. Partial economic returns for the two different culture durations was US $ 2.16 and 3.25 kg(-1) for shrimps produced in 65 and 75 DOC respectively.
机译：为了评估产量特征的变化，以较低的放养率对两种不同的养殖时间进行了凡纳滨对虾的实验性养殖。将南美白对虾（PL 10）的幼体无特定病原体（SPF）放到六个0.08公顷的池塘中，放养率是32头。 m（-2）。在两个养殖持续时间（即65天和75天养殖（DOC））之后收获虾。与较低的耕种时间相比，更长的耕种时间（75 DOC）显示出更高的产量（6 t ha（-1）），更大的尺寸（13.2 +/- 0.02 cm）和更高的增重（18.94 +/- 0.08 g）。持续时间（65 DOC）的农作，记录的产量为4.3 t ha（-1），收获时的收获尺寸为11.86 +/- 0.14 cm，增重14.28 +/- 0.11 g。然而，特定的生长速率，SGR（％）天（-1）表明，随着培养时间的增加，生长速率降低。各处理之间的饲料转化率（FCR）没有显着差异。两种处理均略小于一种，这可能归因于池塘生产力的影响。两种不同养殖持续时间的部分经济回报分别为65和75 DOC的虾分别为2.16美元和3.25 kg（-1）。

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