Crocodile feed, crocodile breeding method and application

Abstract

The invention provides crocodile feed, a crocodile breeding method and application, and relates to the technical field of crocodile breeding. The crocodile feed with high meat percentage comprises fish, fish meal, vitamins, calcium powder, medicinal materials and probiotics, the fish meal comprises fish, shrimp and terrestrial animal meat; the medicinal materials comprise at least one of malt, houttuynia cordata and hawthorn. According to the crocodile breeding method, the crocodile feed is fed, the meat yield and the laying rate of crocodiles and the fertilization rate and the hatching rate of crocodile eggs are increased, meanwhile, the economic benefit of the crocodile breeding system is high, and the preparation method of the crocodile feed is simple and efficient.

Description

Technical Field

[0001] The present invention provides alligator feed, an alligator breeding method and applications, relating to the technical field of alligator farming, and specifically relating to an alligator feed with a high meat yield rate, a feed for female alligators during the breeding period, a feed for female alligators for at least 1 - 3 months after laying eggs, a feed for male alligators for at least 1 month before mating, an alligator breeding method and applications. Background Art

[0002] Alligators have extremely high economic value, social significance and biological value. When artificially breeding alligators, it is necessary to meet the needs of their physiological and ecological activities, simulate the natural ecological environment, and build a breeding and reproduction area so that they can complete activities such as foraging, growing, mating, laying eggs, hatching and hibernating within a small range. In the existing alligator breeding management and artificial reproduction, there are problems such as poor alligator meat yield rate, egg laying rate, fertilization rate and hatching rate of alligator eggs.

[0003] Chinese Patent CN113749043A discloses an ecological alligator comprehensive breeding system, including an alligator breeding area, a feed fish breeding area and a planting area arranged in sequence; the alligator breeding area includes an open-air fish pond, a wintering greenhouse shed arranged beside the open-air fish pond and a feed feeding area; the open-air fish pond is equipped with a water supply system of natural mountain spring water; the outside of the wintering greenhouse shed is covered with a transparent plastic film for heat preservation and moisture retention; the feed feeding area is arranged close to the feed fish breeding area; the feed fish breeding area breeds mixed fish for feeding alligators; the planting area is used for recycling the organic fertilizers in the alligator breeding area and the feed fish breeding area. According to the concept of environmental protection and ecological breeding, an ecological breeding method is combined to form an ecological system of circular breeding mainly based on alligators, forming an ecological circular breeding system circle, ensuring the growth environment of alligators, and thus ensuring the quality of alligator meat. The feed used is: 60 - 80 parts of fish meal, 10 - 20 parts of starch, 5 - 10 parts of Chinese yam, 5 - 10 parts of bupleurum, 3 - 5 parts of hawthorn, 3 - 8 parts of protein powder, 2 - 5 parts of vitamin C, and 20 - 40 parts of water. When feeding alligators with this feed, the gender of alligators is not distinguished, resulting in a decrease in the egg laying rate, fertilization rate and hatching rate of alligator eggs during reproduction.

[0004] Chinese Patent CN107296012A discloses a method for breeding crocodiles, including: (1) feeding management: selecting different feeding densities and feeds according to different growth stages; (2) light control; (3) hatching management; (4) temperature and humidity control; (5) environmental sanitation management. This method adopts feed management. By using appropriate feeds and feeding densities for crocodiles at different growth stages, it promotes the growth of crocodiles and improves the survival rate of crocodiles. By controlling the temperature, humidity and light in the breeding pond, it improves the survival rate and egg-laying rate of crocodiles. By controlling the temperature and humidity in the hatching room and disinfecting the breeding eggs, it improves the hatching rate of crocodile egg embryos. Although this method adopts appropriate feeds and feeding densities for crocodiles at different growth stages, it does not adjust the feed feeding according to different genders, and there is still room for improvement in the egg-laying rate of crocodiles.

[0005] Guo Shidong (in "Crocodile Breeding and Feed", "Feed Industry", Vol. 19, No. 2, 1998) disclosed that in the initial stage of breeding, fresh fish, nutria and chicken meat, etc. were the main feeds for crocodiles. These items were crushed into minced meat to feed young crocodiles, and whole fish or meat strips were fed after they grew up. Fish meal, chicken meal and meat and bone meal were the main protein sources for crocodile compound feeds, and a small number of crocodile farms also used soybean protein. Chicken oil and fish oil were the main fat sources. Vegetable oils such as soybean oil and sunflower oil were also used in the compound feeds for young crocodiles. However, it did not adjust the feed feeding according to different genders, which would lead to a decrease in the egg-laying rate of crocodiles. Summary of the Invention

[0006] In order to solve the deficiencies existing in the prior art, the present invention provides a crocodile feed, a crocodile breeding method and an application. By using the crocodile breeding method of the present invention and feeding the crocodile feed of the present invention, the meat yield rate, egg-laying rate, fertilization rate and hatching rate of crocodile eggs are improved. At the same time, the economic benefit of the crocodile breeding system of the present invention is high, and the preparation method of the crocodile feed is simple and efficient.

[0007] To achieve the above object, the technical solutions adopted by the present invention are as follows:

[0008] In the first aspect, the present invention provides a crocodile feed with a high meat yield rate, including fish, fish meal, vitamins, calcium powder, medicinal materials and probiotics; the fish meal includes fish, shrimp and terrestrial animal meat; the medicinal materials include at least one of malt, houttuynia cordata and hawthorn.

[0009] Further, the crocodile feed is calculated by weight and includes 20-80 parts of fish, 20-80 parts of fish meal, 3-8 parts of vitamins, 5-15 parts of calcium powder, 6-16 parts of medicinal materials and 5-10 parts of probiotics.

[0010] Further, the fish meal includes fish, shrimp and terrestrial animal meat in a mass ratio of (4-12):(4-8):(12-20).

[0011] Preferably, the fish meal comprises fish, shrimps and terrestrial animal meat in a mass ratio of (8 - 12):(6 - 8):(16 - 20).

[0012] More preferably, the fish meal comprises fish, shrimps and terrestrial animal meat in a mass ratio of (8 - 10):(6 - 7):(16 - 18).

[0013] Furthermore, the crocodiles include Siamese crocodiles and estuarine crocodiles; when the crocodile is a Siamese crocodile, the medicinal materials are Houttuynia cordata and malt; when the crocodile is an estuarine crocodile, the medicinal materials are Houttuynia cordata and hawthorn.

[0014] Furthermore, when the crocodile is a Siamese crocodile, the crocodile feed comprises 60 - 80 parts of fish, 20 - 40 parts of fish meal, 3 - 8 parts of vitamins, 10 - 15 parts of calcium powder, 3 - 8 parts of Houttuynia cordata, 3 - 8 parts of malt and 5 - 10 parts of probiotics; when the crocodile is an estuarine crocodile, the crocodile feed comprises 20 - 30 parts of fish, 40 - 80 parts of fish meal, 3 - 8 parts of vitamins, 5 - 10 parts of calcium powder, 3 - 8 parts of Houttuynia cordata, 3 - 8 parts of hawthorn and 5 - 10 parts of probiotics.

[0015] Preferably, when the crocodile is a Siamese crocodile, the crocodile feed comprises 70 - 80 parts of fish, 30 - 40 parts of fish meal, 3 - 5 parts of vitamins, 12 - 15 parts of calcium powder, 3 - 5 parts of Houttuynia cordata, 5 - 8 parts of malt and 6 - 9 parts of probiotics.

[0016] Preferably, when the crocodile is an estuarine crocodile, the crocodile feed comprises 25 - 30 parts of fish, 40 - 60 parts of fish meal, 5 - 8 parts of vitamins, 8 - 10 parts of calcium powder, 5 - 8 parts of Houttuynia cordata, 5 - 8 parts of hawthorn and 6 - 9 parts of probiotics.

[0017] Furthermore, the fish includes silver carp, bighead carp, grass carp, blunt snout bream, black carp, mud carp, common carp, crucian carp, eel and tilapia.

[0018] Furthermore, the terrestrial animal meat includes at least one of chicken, duck, goose, beef, mutton, horse, donkey and pork.

[0019] Furthermore, the vitamins include vitamin A, vitamin B, vitamin D and vitamin E; the calcium powder includes at least one of calcium carbonate, calcium lactate, calcium gluconate, calcium citrate and bone meal.

[0020] Furthermore, the probiotics comprise Lactobacillus plantarum, Bifidobacterium and Lactobacillus acidophilus in a mass ratio of (1 - 3):(2 - 5):(3 - 7).

[0021] Preferably, the probiotics comprise Lactobacillus plantarum, Bifidobacterium and Lactobacillus acidophilus in a mass ratio of (1 - 3):2:(3 - 5).

[0022] Second aspect, the present invention provides a feed for female crocodiles during the breeding period, comprising the above-mentioned crocodile feed and additive 1; the breeding period is from 2 to 3 months before the female crocodile mates to the time when the female crocodile lays eggs; the additive 1 comprises animal viscera, insect powder, calcium powder and angelica.

[0023] Further, the additive 1 comprises 5 - 10 parts of animal viscera, 5 - 10 parts of insect powder, 5 - 15 parts of calcium powder and 3 - 8 parts of angelica.

[0024] Third aspect, the present invention provides a feed for female crocodiles 1 - 3 months after laying eggs, comprising the above-mentioned crocodile feed and additive 2; the additive 2 comprises animal viscera, insect powder, calcium powder, honeysuckle and vitamins.

[0025] Further, the additive 2 comprises 5 - 10 parts of animal viscera, 5 - 10 parts of insect powder, 5 - 15 parts of calcium powder, 3 - 8 parts of honeysuckle and 5 - 10 parts of vitamins.

[0026] Fourth aspect, the present invention provides a feed for male crocodiles 1 month before mating, comprising the above-mentioned crocodile feed and additive 3; the additive 3 comprises insect powder and wolfberries.

[0027] Further, the additive 3 comprises 5 - 10 parts of insect powder and 3 - 8 parts of wolfberries.

[0028] Fifth aspect, the present invention provides a method for raising female crocodiles, comprising the following steps:

[0029] (1) From 2 to 3 months before the female crocodile mates to the time when the female crocodile lays eggs, feed the above-mentioned feed for female crocodiles during the breeding period;

[0030] (2) 1 - 3 months after the female crocodile lays eggs, feed the above-mentioned feed for female crocodiles 1 - 3 months after laying eggs;

[0031] (3) Except for the time periods described in steps (1) and (2), feed the above-mentioned crocodile feed.

[0032] Sixth aspect, the present invention provides a method for raising male crocodiles, characterized in that 1 month before the male crocodile mates, feed the above-mentioned feed for male crocodiles 1 month before mating; except for 1 month before mating, feed the above-mentioned crocodile feed.

[0033] Seventh aspect, the present invention provides the application of the above-mentioned crocodile feed and / or the above-mentioned feed for female crocodiles during the breeding period and / or the above-mentioned feed for female crocodiles 1 - 3 months after laying eggs and / or the above-mentioned feed for male crocodiles 1 month before mating in improving the quality of crocodile raising.

[0034] Further, the quality of crocodile raising includes: the meat yield rate of crocodiles, the number of eggs laid, and the fertilization rate and hatching rate of crocodile eggs.

[0035] The beneficial effects of the present invention are as follows:

[0036] (1) By adjusting the composition of the alligator feed and adding fish, fish meal, vitamins, calcium powder, medicinal materials and probiotics in different dosage relationships, the present invention improves the meat yield rate of alligators;

[0037] (2) By adjusting the feed for different species of alligators and for alligators of different genders and at different stages, the present invention improves the meat yield rate, egg production rate, fertilization rate and hatching rate of alligator eggs.

[0038] (3) By adding and adjusting the feed for female alligators after egg laying, the present invention improves the egg production rate of alligators in the next year, and the fertilization rate and hatching rate of alligator eggs are also increased. Detailed implementation manners

[0039] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the following specific embodiments are used to further clarify the present invention. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention. It should be noted that the raw materials used in the present invention are all ordinary commercially available products, and no specific limitation is made on their sources. The technical and scientific terms used in the embodiments have the meanings commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0040] The present invention does not limit the sources of the raw materials used. Unless otherwise specified, the raw materials used in the present invention are all ordinary commercially available products in the technical field of the present invention.

[0041] The "ranges" disclosed herein are in the form of lower and upper limits. There may be one or more lower limits, and one or more upper limits. A given range is defined by selecting a lower limit and an upper limit. The selected

[0042] lower limit and upper limit define the boundaries of a particular range. All ranges that can be defined in this way are inclusive and combinable, that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60 - 120 and 80 - 110 are listed for a particular parameter, ranges of 60 - 110 and 80 - 120 are also contemplated. In addition, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4 and 5 are listed, then the following ranges are all contemplated: 1 - 2, 1 - 4, 1 - 5, 2 - 3, 2 - 4 and 2 - 5.

[0043] In the present invention, unless otherwise specified, the numerical range "a - b" represents an abbreviated representation of any real number combination between a and b, where both a and b are real numbers. For example, the numerical range "0 - 5" means that all real numbers between "0 - 5" are fully listed herein, and "0 - 5" is just an abbreviated representation of these numerical combinations.

[0044] In the present invention, if there is no special instruction, all the embodiments and preferred embodiments mentioned herein can be combined with each other to form new technical solutions.

[0045] In the present invention, if there is no special instruction, all the technical features and preferred features mentioned herein can be combined with each other to form new technical solutions.

[0046] In the present invention, at least 2 - 3 months before the female crocodile mates until it lays eggs, feed the female crocodile during the breeding period. This means that the female crocodile during the breeding period can be fed for a longer time, but not shorter than the time from at least 2 - 3 months before mating until the female crocodile lays eggs.

[0047] In the present invention, at least 1 - 3 months after the female crocodile lays eggs, feed the female crocodile for at least 1 - 3 months after laying eggs. This means that the female crocodile can be fed for a longer time for at least 1 - 3 months after laying eggs, but not shorter than the time of at least 1 - 3 months after laying eggs.

[0048] In the present invention, at least 1 month before the male crocodile mates, feed the male crocodile for at least 1 month before mating. This means that the male crocodile can be fed for a longer time for at least 1 month before mating, but not shorter than the time of at least 1 month before mating.

[0049] The insect powder of the present invention is purchased from: Shandong Maina New Materials Co., Ltd., insect protein powder, product number: MN202406.

[0050] The vitamin of the present invention is purchased from: Aquaculture Professional Multivitamin, Huatian Pharmaceutical Co., Ltd.

[0051] Lactobacillus plantarum is purchased from: Xi'an Mixian'er Biotechnology Co., Ltd., 200 billion cfu / g, model M1205.

[0052] Bifidobacterium is purchased from: Xi'an Mixian'er Biotechnology Co., Ltd., Bifidobacterium animalis, 10 billion cfu / g, model M1115.

[0053] Lactobacillus acidophilus is purchased from: Xi'an Mixian'er Biotechnology Co., Ltd., 10 billion cfu / g, model M1021.

[0054] Lactobacillus casei is purchased from: Xi'an Mixian'er Biotechnology Co., Ltd., 10 billion cfu / g, model M1128.

[0055] Tilapia is used for the fish of the present invention, white shrimp for the shrimp, chicken for the terrestrial animal meat, chicken bone powder for the calcium powder, and pig liver for the animal viscera.

[0056] I. Examples and Comparative Examples

[0057] The materials of Examples 1-3 and Comparative Examples 1-5 (non-breeding period Siamese crocodile feed) are shown in Table 1.

[0058] Table 1

[0059]

[0060] *: Replace Lactobacillus plantarum with Lactobacillus casei.

[0061] The materials of Examples 4-6 and Comparative Examples 6-8 (non-breeding period estuarine crocodile feed) are shown in Table 2.

[0062] Table 2

[0063]

[0064] The additives 1 for female during breeding period, additive 2 for male during breeding period, and additive 3 for female after laying eggs of Examples 1-6 and Comparative Examples 1-8 are shown in Table 3.

[0065] Table 3

[0066]

[0067]

[0068] The additives 1, 2, and 3 of Comparative Examples 1-4 are the same as those of Example 3; the additives 1, 2, and 3 of Comparative Examples 5-6 are the same as those of Example 6.

[0069] Comparative Example 7

[0070] Feed the Siamese crocodiles with the estuarine crocodile feed of Example 6.

[0071] Comparative Example 8

[0072] Feed the estuarine crocodiles with the Siamese crocodile feed of Example 3.

[0073] Comparative Example 9

[0074] The difference from Example 3 is that the feed for female Siamese crocodiles during the breeding period is the feed for non-breeding period Siamese crocodiles of Example 3.

[0075] Comparative Example 10

[0076] The difference from Example 6 is that the feed for male estuarine crocodiles during the breeding period is the feed for non-breeding period estuarine crocodiles of Example 6.

[0077] Comparative Example 11

[0078] The difference from Example 6 is that the feed for female estuarine crocodiles after egg-laying is the feed for non-breeding estuarine crocodiles in Example 6.

[0079] Comparative Example 12

[0080] Feed Siamese crocodiles and estuarine crocodiles (regardless of gender and stage) with the feed of Chinese Patent CN113749043A.

[0081] Comparative Example 13

[0082] Feed Siamese crocodiles and estuarine crocodiles (regardless of gender and stage) with the feed of Chinese Patent CN107296012A.

[0083] Preparation methods of Examples 1-6 and Comparative Examples 1-8:

[0084] S1. Fish meal: Cook, dry, and crush fish, shrimp, and terrestrial animal meat.

[0085] S2. Dry and crush Houttuynia cordata and malt, mix them evenly with fish meal, vitamins, calcium powder, and probiotics, dry them, add fish, and obtain the feed for non-breeding Siamese crocodiles.

[0086] S3. Dry and crush Houttuynia cordata and hawthorn, mix them evenly with fish meal, vitamins, calcium powder, and probiotics, dry them, add fish, and obtain the feed for non-breeding estuarine crocodiles.

[0087] S4. Add Additive 1 to the feed for non-breeding Siamese crocodiles to obtain the feed for female Siamese crocodiles during the breeding period, add Additive 3 to the feed for non-breeding Siamese crocodiles to obtain the feed for male Siamese crocodiles during the breeding period, add Additive 2 to the feed for non-breeding Siamese crocodiles to obtain the feed for female Siamese crocodiles after egg-laying, add Additive 1 to the feed for non-breeding estuarine crocodiles to obtain the feed for female estuarine crocodiles during the breeding period, add Additive 3 to the feed for non-breeding estuarine crocodiles to obtain the feed for male estuarine crocodiles during the breeding period, and add Additive 2 to the feed for non-breeding estuarine crocodiles to obtain the feed for female estuarine crocodiles after egg-laying.

[0088] The water content after drying is 5 wt%.

[0089] II. Effect test

[0090] (1) Non-breeding period experiment

[0091] The experimental crocodiles used are Siamese crocodiles and estuarine crocodiles of the same batch at 8 years old. The breeding environment is kept the same (25 - 32 °C, 85% humidity), and they are fed 2 times a week, with the feeding amount being 10% of their body weight.

[0092] Randomly divide the Siamese crocodiles into 11 groups, with 10 in each group (5 females and 5 males). During the non-breeding period, feed them with the non-breeding Siamese crocodile feed of Examples 1-3 and Comparative Examples 1-4, 7, 9, 12, 13 respectively.

[0093] Randomly divide the saltwater crocodiles into 10 groups, with 10 crocodiles in each group (5 females and 5 males). During the non-breeding period, feed them with the non-breeding period Siamese crocodile feeds of Examples 4-6 and Comparative Examples 5, 6, 8, 10, 11, 12, and 13 respectively.

[0094] Measure the body length and weight of the Siamese crocodiles and saltwater crocodiles every 4 months. The meat yield rate = (the difference in the weight of the crocodiles during the 4-month period) / (the feeding amount of the crocodiles during the 4-month period) × 100%. The experimental results are shown in Table 4.

[0095] Table 4

[0096]

[0097] This application adopts the method of feeding different feeds to different breeds of crocodiles, enabling the meat yield rate of the Siamese crocodiles in Examples 1-3 of this application to reach 16.9-18.1%, and the meat yield rate of the saltwater crocodiles in Examples 4-5 to reach 16.5-18.2%. The feed conversion rate is high and the economic benefits are good.

[0098] In Comparative Example 1 and 4, the dosage relationship of the feed formulation was changed, and the meat yield rate of the Siamese crocodiles decreased; in Comparative Examples 2-3, the dosage relationship and type of probiotics were changed respectively, and the meat yield rate of the Siamese crocodiles decreased; in Comparative Example 7, the Siamese crocodiles were fed with the saltwater crocodile feed, and the meat yield rate of the Siamese crocodiles decreased; Comparative Examples 12-13 are the existing technology crocodile feeds and are fed without distinguishing breeds, and the meat yield rate of the Siamese crocodiles decreased.

[0099] In Comparative Example 5, the dosage relationship of the fish meal composition was changed, and in Comparative Example 6, hawthorn was not used, resulting in a decrease in the meat yield rate of the saltwater crocodiles; in Comparative Example 8, the saltwater crocodiles were fed with the Siamese crocodile feed, and the meat yield rate of the saltwater crocodiles decreased; Comparative Examples 12-13 are the existing technology crocodile feeds and are fed without distinguishing breeds, and the meat yield rate of the saltwater crocodiles decreased.

[0100] (2) Breeding period experiment

[0101] In April, 3 months before the Siamese crocodiles reach the breeding period, randomly select sexually mature and stable female crocodiles (12 years old), randomly divide them into 6 groups, with 10 crocodiles in each group, and feed them with the breeding period female Siamese crocodile feeds of Examples 1-3 and Comparative Examples 9, 12, and 13 respectively; randomly select sexually mature male crocodiles (12 years old), randomly divide them into 6 groups, with 10 crocodiles in each group, and feed the male Siamese crocodiles with the breeding period male Siamese crocodile feeds of Examples 1-3 and Comparative Examples 9, 12, and 13 respectively. The female and male Siamese crocodiles in each group are allowed to breed freely.

[0102] In May, three months before the breeding season of the estuarine crocodiles, female crocodiles (12 years old) that had reached sexual maturity and the stable stage were randomly selected and divided into 6 groups of 10 each. They were fed with the breeding-season female estuarine crocodile feeds of Examples 4 - 6 and Comparative Examples 10, 12, and 13 respectively; male crocodiles (12 years old) that had reached sexual maturity were randomly selected and divided into 6 groups of 10 each. They were fed with the breeding-season male estuarine crocodile feeds of Examples 4 - 6 and Comparative Examples 10, 12, and 13 respectively to feed the male estuarine crocodiles. The male and female crocodiles fed with the same feed were regarded as a group, and the female and male estuarine crocodiles in each group were allowed to breed freely.

[0103] Count the number of eggs laid by Siamese crocodiles and estuarine crocodiles and the egg fertilization rate, and incubate the crocodile eggs.

[0104] Observe whether a white line appears at the waist of the crocodile eggs after they are laid. If there is a white line, it means successful fertilization; two to three days later, the white line gradually widens. At 3 days, select strong crocodile eggs (white line 0.5 - 0.8 mm) for incubation and calculate their hatching rate.

[0105] Hatching rate = (Number of successfully hatched crocodile eggs) / (Number of strong crocodile eggs) × 100.

[0106] Fertilization rate = (Number of crocodile eggs with white lines) / (Total number of crocodile eggs) × 100.

[0107] The experimental results are shown in Table 5.

[0108] Table 5

[0109]

[0110]

[0111] In the present invention, during the breeding season, Siamese crocodiles and estuarine crocodiles were respectively fed with the specific breeding-season feeds of the present invention. In Example 1 - 3, there were 10 female Siamese crocodiles in each group. The number of eggs laid was 502 - 553, the number of strong ones reached 455 - 552, the fertilization rate was 91.6 - 97.0%, and the hatching rate was 92.1 - 99.6%; in Example 4 - 5, there were 10 female estuarine crocodiles in each group. The number of eggs laid was 807 - 885, the number of strong ones reached 749 - 847, the fertilization rate was 93.6 - 96.0%, and the hatching rate was 98.1 - 99.2%.

[0112] In Comparative Example 9 of Siamese crocodiles, non-breeding-season Siamese crocodile feed was still fed during the breeding season, and the number of eggs laid, the number of strong ones, the fertilization rate, and the hatching rate decreased; in Comparative Example 10 of estuarine crocodiles, non-breeding-season estuarine crocodile feed was still fed during the breeding season, and the number of eggs laid, the number of strong ones, the fertilization rate, and the hatching rate decreased; in Comparative Examples 12 - 13 of Siamese crocodiles and estuarine crocodiles, the existing technology feeds were still fed during the breeding season, and the number of eggs laid, the number of strong ones, the fertilization rate, and the hatching rate decreased.

[0113] (4) 5-year long-term experiment

[0114] Select 7-year-old female and male estuarine crocodiles of the same batch. During the non-breeding and breeding seasons, feed them with the feed of Example 6 according to the period and gender. After laying eggs, randomly divide the female crocodiles into 2 groups of 10 each, and feed them with the post-egg-laying estuarine crocodile feed of Example 6 and the feed of Comparative Example 11 respectively for 2 months. Then, during the non-breeding and breeding seasons, continue to feed the two groups with the feed of Example 6 according to the period and gender until the next egg-laying. Repeat this feeding operation for 5 years, and record the number of eggs laid, fertilization rate, and hatching rate each year. The experimental results are shown in Table 6.

[0115] Table 6

[0116]

[0117]

[0118] After the estuarine crocodiles of the present invention lay eggs and are fed with a specific post-egg-laying estuarine crocodile feed, it helps their physical recovery; for growing crocodiles, it can not only help their physical recovery, but also enable them to mature as soon as possible, reach the peak egg-laying period, and improve economic benefits; while the estuarine crocodiles in the comparative example are not fed with a specific post-egg-laying estuarine crocodile feed, and the arrival of their peak egg-laying period is relatively slow.

[0119] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than a limitation on the protection scope of the present invention. Any simple modification or equivalent replacement of the technical solution of the present invention by those of ordinary skill in the art shall not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A crocodile feed with high meat yield, characterized in that: It includes fish, fish meal, vitamins, calcium powder, medicinal materials and probiotics; the fish meal includes fish, shrimp and terrestrial animal meat; the medicinal materials include at least one of malt, houttuynia cordata and hawthorn.

2. The crocodile feed according to claim 1, characterized in that: Calculated by weight, it includes 20-80 parts of fish, 20-80 parts of fish meal, 3-8 parts of vitamins, 5-15 parts of calcium powder, 6-16 parts of medicinal materials and 5-10 parts of probiotics.

3. The crocodile feed according to claim 1, characterized in that: The fish meal comprises fish, shrimp and terrestrial animal meat in a mass ratio of (4-12):(4-8):(12-20).

4. The crocodile feed according to claim 1, characterized in that: The crocodiles include Siamese crocodiles and saltwater crocodiles; when the crocodile is a Siamese crocodile, the medicinal materials are houttuynia cordata and malt; when the crocodile is a saltwater crocodile, the medicinal materials are houttuynia cordata and hawthorn.

5. The crocodile feed according to claim 4, characterized in that: When the crocodile is a Siamese crocodile, the crocodile feed comprises 60-80 parts of fish, 20-40 parts of fish meal, 3-8 parts of vitamins, 10-15 parts of calcium powder, 3-8 parts of houttuynia cordata, 3-8 parts of malt and 5-10 parts of probiotics; and / or When the crocodile is a saltwater crocodile, the crocodile feed includes 20-30 parts of fish, 40-80 parts of fish meal, 3-8 parts of vitamins, 5-10 parts of calcium powder, 3-8 parts of houttuynia cordata, 3-8 parts of hawthorn and 5-10 parts of probiotics.

6. The crocodile feed according to any one of claims 1 to 5, characterized in that: The fish include silver carp, black carp, grass carp, bighead carp, black carp, dace, carp, crucian carp, eel and tilapia; and / or The terrestrial animal meat includes at least one of chicken, duck, goose, beef, mutton, horse, donkey and pork; and / or The vitamins include vitamin A, vitamin B, vitamin D and vitamin E; the calcium powder includes at least one of calcium carbonate, calcium lactate, calcium gluconate, calcium citrate and bone powder; and / or The probiotics include Lactobacillus plantarum, Bifidobacterium and Lactobacillus acidophilus in a mass ratio of (1-3):(2-5):(3-7).

7. A feed for female crocodiles in the breeding period, characterized in that: The crocodile feed and additive 1 comprise any one of claims 1 to 6; the breeding period is at least 2 to 3 months before mating of female crocodiles until the female crocodiles lay eggs; the additive 1 comprises animal offal, insect powder, calcium powder and angelica.

8. The feed for female crocodiles in the breeding period according to claim 7, characterized in that: The additive 1 comprises 5-10 parts of animal offal, 5-10 parts of insect powder, 5-15 parts of calcium powder and 3-8 parts of angelica.

9. A feed for female crocodiles at least 1-3 months after laying eggs, characterized in that: The crocodile feed comprises the crocodile feed as described in any one of claims 1 to 6 and additive 2; the additive 2 comprises animal offal, insect powder, calcium powder, honeysuckle and vitamins.

10. The feed for female crocodiles at least 1-3 months after laying eggs according to claim 9, characterized in that: The additive 2 comprises 5-10 parts of animal offal, 5-10 parts of insect powder, 5-15 parts of calcium powder, 3-8 parts of honeysuckle and 5-10 parts of vitamins.

11. A feed for male crocodiles at least one month before mating, characterized in that: It comprises the crocodile feed according to any one of claims 1 to 6 and additive 3; the additive 3 comprises insect powder and wolfberry.

12. The feed for male crocodiles at least one month before mating according to claim 11, characterized in that: The additive 3 comprises 5-10 parts of insect powder and 3-8 parts of wolfberry.

13. A method for raising female crocodiles, characterized in that: The following steps are involved: (1) Feeding the female crocodile with the breeding feed of any one of claims 7 to 8 at least 2 to 3 months before mating until the female crocodile lays eggs; (2) feeding the female crocodile with the feed for female crocodiles at least 1 to 3 months after laying eggs as described in any one of claims 9 to 10; (3) Except for the time described in step (1) and step (2), feeding the crocodile feed described in any one of claims 1 to 6.

14. A method for raising male crocodiles, characterized in that: At least one month before mating, the male crocodile is fed with the male crocodile feed described in any one of claims 11-12; except for one month before mating, the crocodile feed described in any one of claims 1-6 is fed.

15. Use of the crocodile feed according to any one of claims 1 to 6 and / or the breeding female crocodile feed according to any one of claims 7 to 8 and / or the female crocodile feed for at least 1 to 3 months after egg laying according to any one of claims 9 to 10 and / or the male crocodile feed for at least 1 month before mating according to any one of claims 11 to 12 in improving the quality of crocodile breeding.

16. The use according to claim 15, characterized in that The crocodile breeding quality includes: crocodile meat yield, egg production, fertilization rate and hatching rate of crocodile eggs.

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