Feed competition reduces heritable variation for body weight in Litopenaeus vannamei

Table 1 Data structure and summary statistics for body weight (g) at the end of test under two feeding regimes in generation G₃ of Litopenaeus vannamei

Test program^a	Number of groups	Sex	N1^b	N2	Mean	Min	Max	SD	CV	Survival rate (%)
Ad libitum feeding	80	All	3360	2641	16.82	4.40	31.50	3.67	21.82	78.60
		Male	–	1176	16.75	4.40	27.40	3.50	20.89	–
		Female	–	1435	16.87	4.50	31.50	3.80	22.56	–
Restricted feeding	80	All	3360	2640	14.89	4.60	28.90	3.91	26.26	78.57
		Male	–	1253	14.72	4.60	27.20	3.62	24.59	–
		Female	–	1387	15.04	4.80	28.90	4.14	27.53	–

N1, number of individuals at stocking
N2, number of individuals at harvest
Min, minimum body weight (g)
Max, maximum body weight (g)
SD, standard deviations of body weight (g)
CV, variation coefficient of body weight (%)
^aNumbers of sires, dams, paternal and maternal half-sib families were equal to 65, 68, 24 and 30, respectively, but the number of half-sib families indicated is less than 54 because seven full-sib families were identical between the paternal and maternal groups
^bGenders of individuals at stocking were not identified

ISSN: 1297-9686