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Culturing method for promoting growth of hologynic tilapia and/or improving nutrient composition of hologynic tilapia

A farming method and technology for tilapia, applied in fish farming, climate change adaptation, animal feed, etc., can solve the problems of not yet clearly differentiated, uneven growth and physical conditions, affecting growth, etc., and improve nutritional value. and economic value, improving the nutritional composition of fish, reducing the effect of liver fat content

Inactive Publication Date: 2013-03-27
JINAN UNIVERSITY
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Problems solved by technology

However, different fish have different body shapes, physiological and ecological characteristics, and their swimming ability and current resistance ability are also different. Therefore, the amount of exercise required to achieve the best exercise effect is also different. Excessive exercise will affect its normal growth.
Even for the same species of fish, due to the different physiological and ecological characteristics of fish in different growth and development stages (such as juvenile fish, adult fish, breeding period) and different sexes (female fish, male fish), the responses to changes in the external environment are also different. (positive or negative), so this breeding method is only suitable for juvenile fish whose gonads have not yet developed and whose male and female traits have not yet been clearly differentiated. Once the gonads begin to develop, fish of different sexes will have different physiological and ecological responses to water flow stimulation. Therefore, there will be obvious gender differences in the breeding effect, and the growth and physical conditions will be uneven.
On the other hand, the current running water stimulation only focuses on the intensity of exercise, and lacks consideration of the impact of the length of daily exercise on the growth and nutrient metabolism of farmed fish, so it cannot be based on the growth stage, physiological and ecological characteristics of the breeding object and the regulation purpose of the breeder. (Mainly to promote growth or improve the nutritional composition and economic value of farmed fish) Design a reasonable combination of "exercise intensity-exercise time" and the best exercise program, so the best exercise training effect for farmed fish cannot be achieved

Method used

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  • Culturing method for promoting growth of hologynic tilapia and/or improving nutrient composition of hologynic tilapia
  • Culturing method for promoting growth of hologynic tilapia and/or improving nutrient composition of hologynic tilapia
  • Culturing method for promoting growth of hologynic tilapia and/or improving nutrient composition of hologynic tilapia

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] All male tilapia with wet weight (91.32±3.07) g and body length (13.80±0.46) cm were used as test materials, and static water control group (C), high intensity (1.5bl / s)-long time (12h) were set up. Exercise group (H-L), high-intensity (1.5bl / s)-short-time (6h) exercise group (H-S), low-intensity (1.0bl / s)-long-time (12h) exercise group (L-L) and low-intensity (1.0 bl / s)—short time (6h) exercise group (L-S), a total of 28 days of breeding experiments. During the test period, the tilapia extruded compound feed was fed at 07:30 and 15:30 every day (water temperature was (24±1)°C).

[0024] The result is as figure 1 and figure 2 As shown, it shows that the body weight specific growth rate and There was no significant difference in weight gain rate, but they were significantly higher than the other three groups, including static water control group (C), high-intensity (1.5bl / s)-long-time (12h) exercise group (H-L) and low-intensity (1.0bl / s) / s)—short time (6h) exercis...

Embodiment 2

[0026] All male tilapia with wet weight (331.3±49.2) g and body length (331.3±49.2) cm were used as test materials, and static water control group (C), high intensity (1.5bl / s)-long time (12h) were set up. Exercise group (H-L), high-intensity (1.5bl / s)-short-time (6h) exercise group (H-S), low-intensity (1.0bl / s)-long-time (12h) exercise group (L-L) and low-intensity (1.0 bl / s)—short time (6h) exercise group (L-S), a total of 28 days of breeding experiments. During the test period, the tilapia extruded compound feed was fed at 07:30 and 15:30 every day, and the water temperature was (24.5±1)°C.

[0027] The result is as image 3 As shown, it shows that: high-intensity (1.5bl / s) - long-time (12h) exercise group (H-L) has the highest muscle protein content, compared with the other four groups, the protein content increased by 12.7-19.4%; high-intensity (1.5bl / s) s)—Short time (6h) exercise group (H-S) and low intensity (1.0bl / s)—long time (12h) exercise group (L-L) had no sign...

Embodiment 3

[0029] All male tilapia with wet weight (331.3±49.2) g and body length (331.3±49.2) cm were used as test materials, and static water control group (C), high intensity (1.5bl / s)-long time (12h) were set up. Exercise group (H-L), high intensity (1.5bl / s)-short time (6h) exercise group (H-S), low intensity (1.0bl / s)-long time (12h) exercise group (L-L) and low intensity (1.0 bl / s)—short time (6h) exercise group (L-S), a total of 28 days of breeding experiments. During the test period, the tilapia extruded compound feed was fed at 07:30 and 15:30 every day, and the water temperature was (245±1)°C.

[0030] The result is as Figure 4As shown, it shows that the high-intensity (1.5bl / s)-long-time (12h) exercise group (H-L) has the lowest liver fat content, which is significantly lower than the other four groups. Compared with the control group, the liver fat content is reduced by 63.2%; There was no significant difference in liver fat content between the high-intensity (1.5bl / s)-sh...

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Abstract

The invention discloses a culturing method for promoting the growth and / or improving the nutrient composition of the hologynic tilapia, and belongs to the filed of aquaculture science and the field of physiological ecology of aquatic animals. According to the method, the tilapia is stimulated by running water to take countercurrent exercise, and the optimum exercise-intensity and exercise-time combinations including the high-intensity and long-time combination, the high-intensity and short-time combination, the low-intensity and long-time combination and the like are designed to culture the tilapia intermittently by running water. Compared with the existing culturing method, the culturing method disclosed by the invention has the advantages of improving the growth rate of the tilapia significantly, increasing the content of protein in the muscle of the tilapia, reducing the content of fat in the liver of the tilapia and preventing the tilapia from having a fatty liver.

Description

technical field [0001] The invention relates to the field of aquaculture and the field of physiological ecology of aquatic animals, in particular to a breeding method for promoting the growth of all male tilapia and / or improving the nutrient composition of the fish body. Background technique [0002] Tilapia is an excellent species of freshwater aquaculture introduced in my country. At present, many nursery farms can produce all-male tilapia seedlings through hybridization or other techniques. Its usual breeding methods include ponds, cement ponds, cage cultures, etc. The breeding process is generally still water or micro-flowing water, and artificial compound feed is fed. The breeding density is high and the output is high. However, due to the crowded environment and small space for activities under high-density breeding conditions, it not only affects its growth rate, but also the cultured products are often obese and of poor quality, and are prone to fatty liver and other...

Claims

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Application Information

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IPC IPC(8): A01K61/00A23K1/18
CPCY02A40/81
Inventor 林小涛李丹衣萌萌朱志明
Owner JINAN UNIVERSITY
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