Nghiên cứu sản xuất cá trê phi Clarias gariepinus (Burchell, 1822) đực bằng Hormone 17-α Methyltestosterone

	22,96	81,87	21,21		21,64		20,31
36		25,42	64,52	13,78		20,66		21,54
37		16,30	38,12	24,60		31,96		45,84
38		46,01	57,48	26,83		29,16		45,06
39		26,21	17,46	21,69		24,16		43,91
40		20,14	29,31	21,03		24,02		20,55
41		15,56	36,51	49,58		13,77		14,50
42		14,50	38,85	62,66		14,74		21,30
43		79,10	35,45	71,28		13,20		22,19
44		70,60	101,53	74,96		16,50		18,13
45		45,33	40,82	68,81		13,65		17,24
46		54,10	53,47	42,20		12,30		13,60
47		43,24	107,27	60,28		37,55		20,10
48		41,16	76,66	53,75		48,05		12,80
49		28,54	37,50	76,18		33,77		18,15
50		57,32	92,34	43,47		37,22		10,33
51		36,46	82,12	39,98		27,06		21,65
52		34,45	72,73	28,56		24,77		16,54
53		35,17	47,89	40,74		24,52		24,01
54		34,12	40,33	55,63		33,58		10,82
55		18,43	57,69	43,34		41,25		23,47
56		18,43	73,28	45,59		46,49		29,38
57		23,21	34,42	41,95		25,55		78,09
58		14,98	64,76	45,75		36,55		88,05
59		16,92	44,52	47,25		28,05		154,20
60		12,09	91,31	38,11		22,48		32,00
61		11,94	75,08	37,66		15,42		48,11
62		93,32		26,68		21,20		47,74
63		61,85		30,93		19,81		45,20
64		39,29		36,10		15,94		31,35
65		81,58		39,71		23,64		38,68
66		110,10		34,15		30,74		42,54
67		65,14		27,98		19,55		30,02
68		69,67		41,70		24,56		23,30
69		54,05		29,79		28,15		31,60
70		57,01		32,85		6,30		44,17
71		47,96		23,25		8,45		49,33
72		30,87		28,43		12,00		7,88
73		45,15		24,89				8,04

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Xem toàn bộ 76 trang tài liệu này.

	34,23		26,39	48,95
75		51,40			47,83
76		46,19			30,76
77		57,65			36,49
78		35,91			38,49
79		31,45			46,32
80		42,90			43,20
81		32,96			40,70
82		32,10			25,88
83		35,54			48,66
84		25,64			43,96
85		28,06			34,34
86		24,14			42,48
87		19,15			24,57
88		20,29			34,50
89		28,29			13,18
90		37,99			30,14
91		31,21			34,06
92		29,95			27,65
93		25,34			34,50
94		26,35			43,15
95		27,12			40,33
96		22,29			26,34
97		22,54			38,76
98		19,91			35,76
99		15,39			17,26
100		12,80			22,84
101					19,24
102					18,25
103					20,40
104					22,17
105					11,89
106					13,05
107					24,24
108					17,00
109					19,94
110					12,36
111					13,40
112					10,15

Tổng cá thu

6	100	61	74	20	72	12	112
Số cá cái	2	61	17	40	5	46	3	59
Số cá đực	4	39	44	34	15	26	9	53
TL.T.Cộng	104,5	39,0	57,8	41,2	90,2	31,7	70,2	32,8
TL.cái	115,7	38,2	57,8	39,5	98,7	34,6	115,3	34,7
TL.đực	98,9	40,3	57,8	43,3	87,3	26,6	55,2	30,8
Tổng số cá thu trong thí nghiệm:				457
Tổng số cá cái thu trong thí nghiệm:				233
Tổng số cá đực thu trong thí nghiệm:				224
Trọng lượng trung bình g/cá cái				66,8
Trọng lượng trung bình g/cá đực				55,0

Phụ lục 20: Trọng lượng cá trê phi ở thí nghiệm bằng phương pháp ăn MT với ngày tuổi khác nhau.

STT

7 ngày	8 ngày	9 ngày	10 ngày	Đối chứng
1	124,0	75,0	101,0	91,0	52,9
2	111,0	36,0	76,0	40,0	33,9
3	77,0	71,0	42,0	36,0	32,02
4	109,0	117,0	82,0	129,0	33,76
5	73,0	42,0	81,0	123,0	50,18
6	123,0	67,0	88,0	68,0	56,67
7	82,0	37,0	63,0	57,0	23,47
8	67,0	126,0	75,0	48,0	25,55
9	32,0	73,0	67,0	79,0	26,97
10	106,0	55,0	143,0	48,0	45,1
11	41,0	84,0	102,0	78,0	59,06
12	47,0	53,0	86,0	56,0	34,9
13	97,0	45,0	86,0	36,0	55,81
14	26,0	70,0	78,0	78,0	38,07
15	74,0	41,0	130,0	51,0	40,2
16	43,0	61,0	36,0	73,0	14,79
17	116,0	42,0	91,0	59,0	22,78
18	61,0	105,0	94,0	89,0	20,78
19	83,0	54,0	31,0	158,0	21,93
20	59,0	163,0	64,0	105,0	49,39
21	77,0	75,0	75,0	104,0	39,2
22	78,0	70,0	185,0	54,0	45,81
23	59,0	38,0	75,0	58,0	28,98
24	109,0	69,0	87,0	58,0	40,37

82,0	63,0	132,0	67,0	35,26
26	26,0	59,0	95,0	92,0	34,13
27	94,0	100,0	34,0	64,0	35,89
28	42,0	76,0	78,0	56,0	24,79
29	87,0	73,0	67,0	80,0	38,02
30	136,0	59,0	107,0	81,0	47,77
31	51,0	66,0	89,0	45,0	26,44
32	87,0	45,0	41,0	55,0	35,26
33	104,0	55,0	49,0	44,0	26,79
34	76,0	86,0	88,0	61,0	35,83
35	86,0	47,0	110,0	68,0	20,31
36	46,0	62,0	59,0	71,0	21,54
37	51,0	104,0	65,0	55,0	45,84
38	36,0	36,0	51,0	37,0	45,06
39	104,0	73,0	56,0	74,0	43,91
40	80,0	63,0	146,0	62,0	20,55
41	175,0	68,0	89,0	80,0	14,5
42		50,0	44,0	36,0	21,3
43		78,0	103,0	36,0	22,19
44		128,0	43,0	49,0	18,13
45		78,0	135,0	48,0	17,24
46		63,0	70,0	43,0	13,6
47		45,0	108,0	39,0	20,1
48		22,0	80,0	73,0	12,8
49		128,0	80,0	82,0	18,15
50		110,0	61,0	48,0	10,33
51		49,0	78,0	66,0	21,65
52		67,0	143,0	99,0	16,54
53		56,0	275,0	75,0	24,01
54		72,0	76,0	92,0	10,82
55		108,0	84,0	47,0	23,47
56		55,0	139,0	59,0	29,38
57		47,0	42,0	40,0	78,09
58		27,0	144,0	32,0	88,05
59		110,0	122,0	40,0	154,2
60		84,0	119,0	62,0	32
61		125,0	132,0	27,0	48,11
62		38,0	63,0	106,0	47,74
63		46,0	42,0	59,0	45,2

	98,0	48,0	77,0	31,35
65		52,0	67,0	68,0	38,68
66		91,0	80,0	99,0	42,54
67		59,0		86,0	30,02
68		56,0		76,0	23,3
69		129,0		84,0	31,6
70		69,0		51,0	44,17
71		68,0		46,0	49,33
72		42,0		61,0	7,88
73				62,0	8,04
74				49,0	48,95
75				51,0	47,83
76				51,0	30,76
77				57,0	36,49
78				65,0	38,49
79				128,0	46,32
80				40,0	43,2
81				57,0	40,7
82				67,0	25,88
83					48,66
84					43,96
85					34,34
86					42,48
87					24,57
88					34,5
89					13,18
90					30,14
91					34,06
92					27,65
93					34,5
94					43,15
95					40,33
96					26,34
97					38,76
98					35,76
99					17,26
100					22,84
101					19,24
102					18,25

103

				20,4
104					22,17
105					11,89
106					13,05
107					24,24
108					17
109					19,94
110					12,36
111					13,4
112					10,15
Tổng cá thu	41	72	66	82	112,0
Số cá cái	14	22	5	25	59
Số cá đực	27	50	61	57	53
TL.T.cộng (g)	79,0	70,2	87,5	65,9	32,8
TL.cái (g/con)	79,6	71,0	76,4	73,7	34,7
TL.đực (g/con)	78,6	69,8	88,4	62,4	30,8

Tổng số cá thu trong thí nghiệm: 373

Tổng số cá cái thu trong thí nghiệm: 125

Tổng số cá đực thu trong thí nghiệm: 248

Trọng lượng trung bình g/cá cái 33,5

Trọng lượng trung bình g/cá đực 74,8

Phụ lục 21: vật liệu dùng trong nghiên cứu.

Ghi chú: (A) hormon 17-α Methyltestosterone; (B) thức ăn 40% đạm dùng trong 21 ngày đầu; (C) thức ăn 35% đạm dùng trong giai đoạn từ 21 đến 100 ngày tuổi;

(D) dụng cụ kiểm tra chỉ tiêu môi trường ; (E) cân điện tử; (F) Kính hiển vi.

Phụ lục 22: kiểm tra tổ chức tuyến sinh dục cá.

Ghi chú: (A) giải phẫu cá; (B) cắt lấy một phần tuyến sinh dục cá; (C) nhuộm mẫu với dung dịch Aceto-carmin;(D) quan sát mẫu dưới kính hiển vi quan học.

Phụ lục 23: Hệ thống ương cá trong thí nghiệm

Ghi chú: (A) hệ thống thùng 60 lít bố trí thí nghiệm trong thời gian 21 ngày; (B) hệ thống bể xi măng 1m3 sử dụng nuôi cá đến 100 ngày tuổi.

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Ngày đăng: 30/05/2022