Method for artificially releasing, listing and marking fishes without spines or with spines and without spinal teeth

A ratchet and fish technology, applied in the field of fish biology, can solve the problems of complex operation, poor marking effect, and inability to list signs, etc., and achieve the effect of simple operation, small damage to fish, and improved accuracy

Inactive Publication Date: 2012-01-04
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some fish, such as grass carp, bighead carp, silver carp, etc., have no hard spines in their fins, or although other fish have hard spines, there are no teeth on the spines, so for these fish, it is impossible to hang the card directly on the fin However, there are shortcomings such as poor marking effect or complicated operation when using fin cutting marking method and ink filling method for marking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] To tag grass carp with copper wire, the steps are as follows:

[0016] Temporary raising of fish before listing: Select artificially bred grass carp juveniles with a body length of 11-17cm and a weight of 50-70g, and put them into a holding pond with clear water. Place 3 air-filled stones per square meter in the holding pond for continuous inflation. , the density of stocking fish is 30 fish / m 2 , temporarily raise and observe for 7 days, feed floating feed at 9:00 am and 16:00 pm every day, the feeding amount is 3% of the fish body weight, and replace the same with 1 / 3 of the pool water volume before feeding in the morning The volume of the pool water; after observing that the fish is normal, list the sign.

[0017] Listing sign: Before listing, the operator cleans his hands and wipes and disinfects them with 70% alcohol by mass, and soaks and disinfects ophthalmic scissors, tweezers, sewing needles and copper wire for 8 minutes. The diameter of the copper wire is 0.1...

Embodiment 2

[0022] In this example, the grass carp in Example 1 was replaced by bighead carp, with a body length of 10-20 cm and a body weight of 50-100 g. The density of the fish in the holding pond before listing was 15 fish / m 2 , feeding amount and time, signs and listing method, copper wire quality and diameter, holding method and pond test method are identical with embodiment 1. After 10 days of temporary cultivation, the survival rate was 100%, and the label retention rate was 87.9%. After being raised in the pond for 2 months, 72 tails died, the survival rate was 92.8%, and the label retention rate was 82.3%.

Embodiment 3

[0024] In the present embodiment, the grass carp in Embodiment 1 is replaced by silver carp, with a body length of 10-21 cm and a body weight of 50-100 g. The density of the fish in the holding pond before listing is 18 fish / m 2 , Feeding amount and time, signs and listing method, copper wire quality and diameter, holding method and pond test method are identical with embodiment 1. After 10 days of temporary breeding, the survival rate of 1000 fish was 97.8%, and the label retention rate was 86.6%. After being raised in the pond for 2 months, 89 tails died, the survival rate was 90.9%, and the label retention rate was 80.5%.

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PUM

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Abstract

The invention discloses a method for artificially releasing, listing and marking fishes without spines or with spines and without spinal teeth. The method comprises the following steps of: narcotizing a fish; passing a hanging line through a hanging ring on a signboard; after threading the hanging line through a needle, passing the needle through the gap between a first axonost and a second axonost in dorsal fin subcutaneous muscle of the fish; after leading out the hanging line by the needle, crossing the hanging line at two sides of the dorsal fin in front of the dorsal fin to form a coil; connecting the crossed two ends of the hanging line; shearing the redundant hanging line; and then completing by putting the signboard right ahead of the dorsal fin. Before being listed, the fishes are necessary to temporarily cultivate. After being listed, the marked fishes are necessary to temporarily cultivate. According to the method disclosed by the invention, the listing and marking problem of the fishes without the spines on fins or with the spines and without the spinal teeth, in particular small-scale fishes, can be solved; furthermore, after the fishes are listed, the body balance and the movement of the fishes cannot be influenced; the damage on the fishes is low; the survival rate is high; the mark shedding rate can be obviously reduced; and the accuracy of the releasing effect evaluation by using the listing, marking and releasing return-catching method is increased.

Description

technical field [0001] The invention belongs to the technical field of fish biology, and in particular relates to a method for artificially releasing and listing fish without hard spines or with spines and without rattans. Background technique [0002] When the wild population of fish cannot reproduce or its reproduction is difficult to maintain the population growth, in order to maintain the biodiversity of fish and the stability of fish resources, artificial release of fish is carried out. In order to evaluate the effect of artificial release (such as the survival, growth, sexual maturity, etc. of the released fish), it is necessary to mark the released fish to distinguish the released group from the wild group. Check the number of fish, check their growth and development, determine their distribution in the water body, and speculate on the movement and distribution of released fish species, growth and development status, population changes and other release effects. At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 张其中崔淼
Owner JINAN UNIVERSITY
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