Wild-training method for improving feeding ability of released Acipenser dabryanus

A technology of dabry's sturgeon and training method, which is applied in field training to improve the feeding ability of released dabry's sturgeon, and achieve the effect of improving the ability, feeding ability and predation ability, and high growth and survival rate

Active Publication Date: 2013-10-02
YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no wild training technology has been imple...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Start predation ability training with newly hatched juveniles.

[0024] 1. Production of bait:

[0025] Manual production of water worm bait: sterilize fresh water worms with ultraviolet light, cut water worms into debris of different lengths with a pulverizer or manual knife, and become water worm slurry bait;

[0026] Man-made fish meal and shrimp meal: capture small river prawns and small miscellaneous fish from fish ponds or buy them from the market, crush them with a grinder, and make fish meal and shrimp meal (extra) by air-drying, sun-drying or low-temperature refrigeration; use mesh sieves Shrimp meal and fish meal of different specifications are sorted to become fish meal and shrimp meal (excessive) bait;

[0027] Buy small shrimps and small miscellaneous fish of different specifications from fish ponds or markets to become fresh bait.

[0028] 2. Feeding domestication:

[0029] Select 200 newly hatched Dabry's sturgeon larvae, and no bait is fed for 1-10 da...

Embodiment 2

[0033] Take the 3-month-old Dabry's sturgeon as an example.

[0034] Before domestication, after 3-month-old Dabry's sturgeon stopped eating for 2 days, from the 3rd day, gradually add shrimp powder, shrimp powder or surimi, surimi powder to the artificial compound feed, the particle size is 4mm, and the original feed is fed every 5 days. The increase ratio is increased by 5% on the basis of the amount. After one month, fresh and live small miscellaneous fish and shrimps can be fed. The size of small miscellaneous fish and shrimps can gradually increase, but the total length is less than 20mm. The ratio of addition is every 10 days. Increase 10% on the basis of the original feeding amount, and gradually reduce the feeding amount of artificial biological feed. The bait is fed once in the morning, in the middle and in the evening, and the amount of feed is 3-5% of the total weight of the Dabry's sturgeon in the breeding pond. After 30 days, when the domesticated Dabry's sturgeon...

Embodiment 3

[0038]Take the 1-year-old Dabry's sturgeon that has ingested artificial compound feed as an example.

[0039] Before acclimatization, after the 1-year-old Dabry's sturgeon stopped eating for 2 days, they began to feed fresh small trash fish and shrimps from the third day. The size of small trash fish and shrimps can gradually increase. All of them are less than 30mm, and the ratio of addition is increased by 10% on the basis of the original feeding amount every 10 days, and the feeding amount of artificial compound feed is gradually reduced. The bait is fed once in the morning, noon and evening, and the amount of feed is 3-5% of the total weight of the total Dabry's sturgeon in the breeding pond, until the proportion of domesticated Dabry's sturgeon preying on small fish and shrimp reaches the total amount of breeding Release can be implemented after 50%.

[0040] Experimental data

[0041] In the experiment, 100 1-year-old Dabry's sturgeon juveniles were used as subjects, a...

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Abstract

The invention provides a wild-training method for improving the feeding ability of released Acipenser dabryanus. The wild-training method comprises the following steps that fish bait is produced; feeding domestication is conducted, wherein feeding domestication starts when are hatched, feeding domestication is conducted on the Acipenser dabranus which are fed with artificial feed for 2-4 months and feeding domestication is conducted on the Acipenser dabranus which are fed with the artificial feed for over 5 months; Through the wild-training method for improving the feeding ability of the released Acipenser dabrayanus, after training is over, both the feeding capability and the predation capability of the Acipenser dabryanus with different specificications are obviously enhanced and improved. After analog wild-release is conducted, the trained Acipenser dabryanus is released to the wild or an experimental pond, the capability of preying on wild life live baits is obviously improved, and the growth rate and the survival rate are obviously higher than the released Acipenser dabryanus which is not trained.

Description

technical field [0001] The invention relates to the technical research field of fishery resources conservation, in particular to a wild training method for improving the feeding ability of released Dabry's sturgeon. Background technique [0002] Carrying out artificial breeding and release of fish is an important way for the conservation of fishery resources and the protection of rare fish. All over the world, artificial breeding and releasing of fish has been carried out for more than 100 years. my country has gradually implemented artificial breeding and releasing since the 1980s, and the types, scale and intensity of releasing fish have also increased year by year, but the effect of breeding and releasing is not ideal. . Existing studies have shown that the poor survival and adaptability of the released fish in the wild is the main reason for the low survival rate of the released fish, and it is also the main limiting factor affecting the effect of the released fish. The...

Claims

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Application Information

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IPC IPC(8): A01K61/00A23K1/18A23K1/10
CPCY02A40/81
Inventor 杜浩危起伟李罗新乔新美刘志刚甘芳熊伟吴金明
Owner YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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