A kind of loading and unloading transportation method of salmon trout fry

Abstract

The invention relates to the technical field of fish transportation and provides a loading and unloading transportation method for salmon and trout fries.The method comprises the following steps of 1, depriving the salmon and trout fries of feed for 40-60 hours in advance; 2, conducting sampling and weighing, wherein according to the incasement density of the salmon and trout fries, calculating the reserved water level in a transportation box; 3, adding fresh water into the transportation box till the reserved water level is reached, wherein the temperature of the fresh water is lower than or equal to 13 DEG C, and the dissolved oxygen amount of the water is greater than or equal to 8 mg / L; 4, conveying the salmon and trout fries together with water into a dehydrator for dehydration through a fish pump, wherein the salmon and trout fries coming out of a fry outlet of the dehydrator enter the transportation box; 5, after the transportation box is filled with the salmon and trout fries, covering the transportation box with a box cover, so that departure can be conducted.By means of the method, loading and unloading time is shortened, after entering a pool, the salmon and trout fries can resume normal ingestion and growth rapidly, the high survival rate is guaranteed, and meanwhile transportation cost is lowered.

Description

technical field [0001] The invention relates to the technical field of fish transportation, in particular to a method for loading and unloading salmon and trout fry. Background technique [0002] Salmon and trout are fishes of the family Salmonidae, including all species belonging to the subfamily Salmoninae and the subfamily Vendaceae. Therefore, people are accustomed to refer to salmonids as salmon trout. Most salmon trout are migratory and active, and they are swimming cold-water fish with high nutritional and economic value. Take Atlantic salmon as an example. In the natural environment, every winter, Atlantic salmon travels upstream from the Atlantic Ocean, migrates thousands of kilometers, leaps over waterfalls and returns to the place of birth to reproduce. Because of its characteristics of spawning in fresh water and growing in sea water, It needs to cultivate seedlings in fresh water, and then transfer them to seawater for cultivation after they grow to a certain ...

AI Technical Summary

Problems solved by technology

It is difficult to catch live fish and fry, and it takes a long time, and the transportation density is not easy to control. If the density is high, it will cause mechanical damage to the fry, such as scale loss, extrusion, etc., and the low density will affect the transportation efficiency.

The method of anesthetizing the fry in advance, the amount of anesthetics that the fry eat cannot be controlled, and the large amount of medication will affect the recovery time of the fry after entering the pond, affect the normal feeding and growth of the fry, and reduce the survival rate

Moreover, although large-scale salmon and trout can be anesthetized to solve the problem of long-distance transportation, the fry are particularly sensitive to anesthetics, and the fry stress response is relatively strong, and their tolerance to anesthesia doses varies, which is difficult to master. It should not be too long, otherwise it will be difficult to return to the normal state after entering the sea water, and the use of anesthetics should be avoided during fry transportation