CN102487868B

CN102487868B - Coreius heterodon fry collection, holding culture and long-distance transportation method

Info

Publication number: CN102487868B
Application number: CN2011104073775A
Authority: CN
Inventors: 刘凯; 施炜纲; 徐东坡; 段金荣; 张敏莹; 周彦峰
Original assignee: Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences
Current assignee: Freshwater Fisheries Research Center of Chinese Academy of Fishery Sciences
Priority date: 2011-12-09
Filing date: 2011-12-09
Publication date: 2013-03-27
Anticipated expiration: 2031-12-09
Also published as: CN102487868A

Abstract

The invention publishes a coreius heterodon fry collection, holding culture and long-distance transportation method. The method comprises the following steps of: selectively performing bottoming and downstream fishing in a water area of relatively concentrated coreius heterodon juvenile fishes with water depth of 10 m to 20 m, slow water flow and a back water area by using a small-sized fish bottom trawl during 10-11 months after water temperature is lower than 25 DEG C; screening out coreius heterodon fries with complete body surfaces and better activity from catches, performing body surface disinfection and then transferring into a live fish carrier cabin to perform holding culture for 2 days, wherein the flow rate of a holding culture water area is 0.5 m/s to 0.8 m/s, the water level is kept at 50 cm to 70 cm, and the water temperature does not exceed 25 DEG C; and after the holding culture is finished, filling the coreius heterodon fries into a fish fry bag with water, meanwhile, placing ice blocks, filling oxygen according to a water-air volume ratio of 1 to 1 and then sealing the neck of the bag, and filling in a foam box with a cover to transport away from sunshine, wherein the entire carriage is controlled within 8 hours. The method is suitable for long-distance transportation of coreius heterodon fries; secondary aeration is not required halfway; and the survival rate is high.

Description

A kind of copper fry kind gathers, supports temporarily and the long-distance transport method

Technical field

The present invention relates to the collection of a kind of copper fry kind, temporary supporting and the long-distance transport method.

Background technology

Copper fish adult distributed areas, the Changjiang river are from the east of river, Nantong, Jiangsu Province section, and to Panzhihua river, Sichuan Province section, distributed areas are very wide on the whole, but the individual specification difference of each river section is very big.It is less that southern Jiangsu, the Congjiang passes to the individual specification of river, Jing Zhou, Hubei Province section copper fish, and body weight is within the 100-600g scope, and 100-300g is main foreigner tourists, and 500-600g's is individual rare.Become gradually greatly from Chongqing to Panzhihua river section specification, once in a while the adult of visible 500-1200g.Reproductive population then mainly concentrates on Chongqing with upper Changjiang region section, and existing survey data shows that its spawning ground should be distributed in Yibin, Sichuan to Panzhihua river section.After 2003, THE LOWER YANGTZE VALLEY Anhui and river, Jiangsu section copper fish amount of fishing sharply descend, and the sociales by THE LOWER YANGTZE VALLEY before and after 2000 become occasional species; To 2010, the copper fish quantity that THE LOWER YANGTZE VALLEY 1 tip cutting net is fished for the whole year is less than 10 tails still, this yield level with 2000 before and after every day fish for tens of tails and compare and suffer a disastrous decline.In view of this; many scientific research institutions of THE LOWER YANGTZE VALLEY successively conduct in-depth research the reason that copper fish natural resources sharply descend; also successively carried out simultaneously the propagation protection research of copper fish resource, as carried out the artificial propagation of copper fish and seed domestication research in the THE LOWER YANGTZE VALLEY waters.But so far, this type of research not yet makes a breakthrough, main cause have following some: (1) THE LOWER YANGTZE VALLEY copper fish quantity sharply descends, and can't collect the adult fish of sufficient amount; (2) copper piscinity is extremely irascible, fishes for rear stress reaction strong, usually can cause body surface seriously injured because clashing, thereby survival rate is extremely low; (3) copper fish domestication difficulty is large, and the above individual domestication that is difficult under artificial condition of 100g is not generally ingested, and becomes thin gradually until dead.

In view of there is above-mentioned technical difficulty in " gathering copper fish adult fish-domestication-artificial propagation-seed rearing " this technology path, and do not make a breakthrough temporarily, part Study personnel are according to previous experiences, think seed domestication difficulty significantly less than adult fish, therefore proposed " gathering copper fry kind-domesticating and cultivating-artificial propagation-seed rearing " this technology path.But there is difficulty equally in the collection of copper fry kind transportation, even also is higher than the copper fish, and its distribution is very little and still uncertain, mainly is distributed in Chongqing, the Changjiang river with upper Changjiang region section simultaneously, away from the THE LOWER YANGTZE VALLEY basin.There is not yet before this batch capture, transport copper fry kind to the successful example in Anhui and Jiangsu Province.

Summary of the invention

The objective of the invention is the difficulty for present copper fry kind collection transportation, overcome the deficiencies in the prior art part, a kind of copper fry kind that can collect appropriate size is provided and is guaranteeing under the prerequisite of survival rate the in batches method of long-distance transport.

The present invention adopts following technical scheme for achieving the above object:

A kind of copper fry kind gathers, supports temporarily and the long-distance transport method, comprises the steps:

(1) seed gathers:

During the 10-11 month, when water temperature was lower than 25 ℃, the selection depth of water was 10-20m, and current delay and have the relatively concentrated waters of copper fish juvenile fish in the pool of whirling; Adopt the otter-trawl subsides end to pull downstream, ship's speed is 1.5-2m/s, and single pulls 5-10 minute, gathers fry; Screening total length 80-130mm, corresponding body weight is the fry of 5-10g, soaks in 2.5% NaCl solution and carries out the body surface sterilization in 5 minutes;

(2) seed is supported temporarily:

It is the running water zone of 0.5-0.8m/s that the fry that gathers is supported temporarily in flow velocity, and water level is 50-70cm, and water temperature is lower than 25 ℃, and supporting the time temporarily is 2 days;

(3) fry long-distance transportation:

Density pack by packed 100 tails of each standard fry or 0.5kg; Water is supported on the spot water intaking of district in temporarily in the bag, behind the filtering sediment aeration 6-12 hour; Put into the 0.5kg ice cube in each fish fry bag, water temperature is not higher than 15 ℃ in the maintenance transportation; To glutted, make the volume ratio of oxygen G﹠W be about 1:1 the fish fry bag oxygenation; With the fry of pack by air transport or automotive to the destination.

Haulage time is no more than 8 hours.

Through practical proof, gather and screening copper fry kind 2000 tails from bright moon a small bay in a river river, Chongqing section with the method, the average specification of sampling is: total length 94mm, the long 68mm of body, body weight 6.2g, Application standard fish fry bag join the bubble chamber shipment, every bag (case) fills 100 tails, totally 20 bags (case).Through air transport to the pudong airport and use carborne to the Jiangsu Jingjiang, omnidistance 7.5 hours consuming time, do not carry out two-pass aerating midway, survival rate reaches 98.5%, the indoor culture control group after 2 weeks survival rates be 100%.

Embodiment

(1) seed gathers:

Acquisition time: during the 10-11 month, water temperature is lower than after 25 ℃; Gather the waters: in Upper Yangtze River Chongqing Bai Shixi-Chao yangsi (Jing-River Point,LI 5) river section, such as waters such as bright moon a small bay in a river, well pond a small bay in a river and lime a small bay in a rivers, the selection depth of water is 10-20m, and current delay and have the waters in the pool of whirling; Collecting method: the selection depth of water is 10-20m, flow velocity delays, has the waters in the small-sized pool of whirling, use the small fishes otter-trawl subsides end to pull, ship's speed is controlled at 1.5-2m/s, hauling after pulling downstream 5-10 minute, filtering out total length is that 80-130mm(is that body weight is 5-10g) copper fry kind put into running water cabin or temporary with the water tank of inflator pump;

(2) seed is supported temporarily:

After seed catching finishes, select that body surface is complete, vigor preferably healthy seedling put into 2.5% NaCl solution and soaked 5 minutes, then move in the running water cabin and support temporarily.Support temporarily in the process good in water quality, as to have certain current bank that perforated ship berthed downstream, but flow velocity should be not too fast, is advisable with 0.5-0.8m/s, water level remains in 50-70cm, and water temperature is no more than 25 ℃.Temporarily supporting the time is 2 days, during appropriateness check the seed situation, the weak or dead seed of rejecting vigor avoids the stimulation to seed as far as possible during operation;

(3) seed transportation:

Conventional method is used in copper fry kind transportation, is with water to pack in the fish fry bag seed, with the sack sealing, puts into bubble chamber lucifuge transportation with cover after the oxygenation, and detail is as follows: 1. haulage time: finish pack, the transportation of leaving before 6 of mornings; 2. traffic density: copper fry kind 100 tails or the 0.5kg that hold 5-10g in each standard fish fry bag; 3. transport the water source: support on the spot water intaking of district in temporarily, be transported to and leave standstill 3-6 hour in the water tank, suck behind the sediment oxygenic aeration 6-12 hour for subsequent use; 4. temperature control measure: put into the ice cube of 1 0.5kg in each fish fry bag, keep that water temperature is not higher than 15 ℃ in the transportation, its corner is polished before putting into ice cube, prevent from puncturing fish fry bag; 5. oxygenation: to glutted, make the volume ratio of oxygen G﹠W be about 1:1 the fish fry bag oxygenation; 6. hours underway: be controlled in 8 hours by technique scheme transportation whole process.

Claims

1. a copper fry kind gathers, supports temporarily and the long-distance transport method, comprises the steps:

(1) copper fry collecting:

(2) seed is supported temporarily:

(3) fry long-distance transportation:

2. a kind of copper fry kind according to claim 1 gathers, supports temporarily and the long-distance transport method, and it is characterized in that: the transportation whole process of described copper fry was controlled in 8 hours.