Recently, a large number of sea star that appear in maritime space of coastal waters of bay of Qingdao rubber administrative division, brought a harm to aquiculture. The reporter develops bureau understanding to arrive from Qingdao city ocean, already allowed to breed an use ground at present basket wait for fishing gear, starfish day adds catching quantity to amount to 100 thousand jins, breed door beforehand appraise still needs to catch least 10 days.
Already caught kill starfish 450 thousand jins
Or else clears thoroughly can delay clam to put a young plant
Classics investigation, this starfish breaks out main concentration is by young of oyster of maritime space of bay of rubber administrative division, clam sow sea area, rough statistic density is average 50 / square metre, stricken be hit by a natural adversity area makes an appointment with 100 thousand mus, predict about 100 million yuan to cause pecuniary loss.
After starfish is eruptive, local fisherman is adopted collect artificially wait for means to catch kill starfish to have 450 thousand jins about. The one name breed aquatics that Mr Zhang is red island fishing port door, basically breed clam and sea Li child, he tells a reporter, the influence loss that suffers a large number of this sea star to inbreak hundred thousands of yuan. "The seafood that I raise is about the same 3000 mus, employed diver to still have trawl net now, procrastinate back and forth, ground basket action is not very big, basically be to rely on dragnet and diver to go down to feel starfish so. " Mr Zhang introduces, his home catchs everyday the starfish amount that come up makes an appointment with 5000 jins, in the meantime, these two days of amounts have the tendency that becomes little. Fortunately, the sea star that salvages is able to sell, "Have a lot of south northeast perhaps the pedlar there, basically 4 control a jin. " Mr Zhang discloses, eliminate hires a ship, hire the cost such as the person, the starfish reluctance that scoops up can make up for 200 thousand yuan or so, but the loss that also cannot offset this to breed aquatic product.
Additionally one name breed aquatics door tell a reporter, the sea star that he salvages everyday also has 5 hoisting jack, and he beforehand cleared sea star still wants estimate at least 15-20 day.
Besides, at present puts the date of clam seedling just about, starfish does not have a law to be handled thoroughly, can postpone the date that puts clam young plant. "The seedling had better be tomb-sweeping day around, put can die late. " breed a respecting.
Already allowed to use ground basket
Breed door beforehand appraise still needs to catch many days 10
Solve problem of starfish grow in quantity, the directest the most efficient way catchs namely. Han Bing of staff member of center of safeguard of management of ocean of bureau of development of Qingdao city ocean introduces, on March 11 afternoon, receive after breeding a report, bureau of development of Qingdao city ocean organizes concerned expert to go to the spot to undertake be examininged on the spot instantly, organize partial shellfish to breed door undertake communicating have an informal discussion. Combine expert opinion and fisherman to appeal to beg, the decision allows to breed door use big mesh land basket net undertakes starfish catchs.
"Breed an use ground basket net undertakes starfish catchs, it is to be inside maritime space of bay of rubber administrative division, demarcate time up to by April, in the meantime, we suggest to breed door, union uses diver to have operation, and dragnet. " introduce according to Han Bing, from go up to begin Saturday, everyday starfish salvages a quantity to increase 100 thousand jins of above.
PS: Ground basket belongs to Shandong to ban with fishing gear red island fishing port is special situation
Shandong releases before this " the announcement that about strengthening marine Fu Jixiu fishing government works " in ever asked, forbidden any units and individual production, sale is banned with what use country sets pour beard basket with fishing gear and fixation series connection (common says " ground basket " , annual is banned with) . Accordingly, allow this to breed an use ground basket it is to be below special situation, for this, the use that bureau of Qingdao ocean development still will knit fishing politics branch to strengthen the right basket net, special net such as dragnet to provide is superintended, violate compasses exercise to be a name with cleared sea star, destroy the behavior of piscatorial resource, give by concerned regulation punishment.
This sea star is eruptive,
Expert analysis basically has at 3 o'clock reason
The much thorn asteroid that this eruptive sea star basically is starfish key link (Asterias Amurensis) , it is the sort of cold water sex with our country coastal and common Yellow Sea, the most comfortable grow temperature 15-20 ℃ , comfortable lukewarm upper limit 25 ℃ , will come to had breed second year in January in October. Starfish is greedy sweep past feeding habits biology, the influence of biology community composition of animal of dwell of insole of bisect cloth area is great, it is a kind of zoology enemy kills live thing, also be industry of briny breed aquatics is important enemy kill live thing.
This sea star is eruptive, because,expert analysis basically is this at 3 o'clock:
It is change of marine zoology environment. Value of the nutrient salt of maritime space water quality, PH, water is warm those who wait for the change of all sorts of hydrology factor to be starfish grow breed offerred appropriate natural condition. Starfish breed force is powerful, survival rate is extremely low, but research makes clear, if marine ecosystem produces little change, cause survival rate of starfish the young to rise, so fall in the case that has natural enemy hardly, a large number of starfish will be extremely easy addition, starfish comes from deep-sea shift shallow sea, cause starfish to breed an area in shellfish grow like a weed, eruptive.
2 be starfish photograph feed habit. Starfish has the habit that to food rich collect area collects, basically prey bivalve kind, sea urchin, ostracean He Haikui. Bay of rubber administrative division regards shellfish breed aquatics as area, young of the oyster that sows by its, clam provided enough food for starfish, a large number of breed that are starfish provided environmental basis. The researcher has made investigation in area of shellfish breed aquatics, breed the sea star inside the area often a lot of, but outside breeding an area particularly little. 2007 and Qingdao sea star is eruptive this year, it is to happen in almost breed an area.
3 it is amount of natural enemy biology decreases. Because suffer the element such as climate to affect, coastal waters preys starfish egg and larval fish amount acute are decreased, the growth that is starfish biomass offerred a possibility.
Prep above Qingdao reports Wang Shuwei of the Hui Min when journalist of lightning of · of Qi Lu net
Origin: Qi Lu net
