Navigation Links
Waterfowl poisoning halved by lead shot prohibition
Date:1/16/2014

Lead shot was forbidden in 2001 in Spanish wetlands on the Ramsar List of these areas of international importance. Ten years later, this prohibition -and the consequent use of steel shot by hunters- has started to bear fruit, according to a report in the journal 'Environment International'.

"The most important part of our work is that it shows that, despite it's still covering a partial area, the change of material from lead to steel shot has reduced waterfowl poisoning and the contamination of hunted meat," Rafael Mateo Soria of the Hunting Resources Research Institute (IREC) and co-author of the study, told SINC.

Lead shot accumulating in wetlands, with over 100 per square metre in many areas, remains in the sediments for decades.

Its main damage is to the health of waterfowl. When the shot is eaten it is retained in the gizzard and is worn down in the stomach, freeing lead that reaches the animal's tissues.

"The birds start to develop neurological problems, they cannot move and they also suffer from anaemia. Normally, if they ingest lead, they die with notable emaciation after days or even weeks after starting to ingest the shot," explained Mateo.

In species such as the mallard, 30% caught at the start of the 1990s in the Ebro delta had ingested lead shot, a figure which has now dropped to 15%. The same trend has been seen in other species such as the northern shoveller, the Eurasian teal and the common pochard.

On the other hand, the case of the northern pintail caught continues to cause alarm since over 70% have shot in their gizzards, a rate similar to that seen three decades ago.

The scientist notes that to discover the reason for the high percentage of poisoning in this species, they will start to fit birds with transmitters. "What we do know is that, because of its type of diet, this is a species with a high risk of ingesting shot. Nevertheless, in others that also have these risk factors, such as the common pochard, the rate has reduced after the change to steel shot," he added.

Another problem caused by lead shot is the contamination of meat. Even after lead shot was banned, the traces in animals caught with this metal exceed the limits set for meat for human consumption.

Lead in the rice fields

Hunters who prefer lead to steel shot claim that the latter is harder and less dense. "With steel, one has to fire a larger shot so that it has the same mass. One cannot fire against the ground because of the risk of ricochets and it is said to damage the shotgun bore. Experience shows that these disadvantages have not affected hunting and that one can continue to hunt perfectly with steel," said Mateo.

Researchers stress that the hunters' compliance with this prohibition has been very high and that they have continued to hunt waterfowl in the same amount after the change from lead to steel.

However, the law forbids lead shot in protected wetlands only. For this reason, lead shot is permitted in rice fields that ducks use as feeding areas, thus maintaining focuses of contamination for the birds and their meat.

"These animals use the rice fields as well as the natural lakes for feeding. There is little logic in stopping the entrance of a pollutant into a protected area if the pollution continues at the same rate a few metres away. The birds don't understand boundaries. It has not been prohibited mainly because these areas are not protected," said the scientist.

Legislation in most European countries

This study has allowed the assessment of the effectiveness of the measures adopted by countries signing the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA). At the last AEWA meeting, the parties were asked to assess the effectiveness of the lead shot prohibition in wetlands and of the changeover to non-toxic alternative munitions.

The AEWA is an agreement to protect waterfowl along their entire migration route between Africa and Eurasia. It was signed by some 30 European countries.

According to the scientist, most European countries have legislation that limits or prohibits the use of lead shot. "Some, such as Denmark, have gone further and have forbidden the use of this type of shot in all types of hunting since 1996."


'/>"/>

Contact: SINC
info@agenciasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Related biology news :

1. Great lakes waterfowl die-offs: Finding the source
2. New study analyzes sharp rise in US drug poisoning deaths by county
3. Electron-beam pasteurization of raw oysters may reduce viral food poisoning
4. Zebrafish study suggests that vitamin B2 (riboflavin) is an antidote to cyanide poisoning
5. Is lead poisoning behind some juvenile crime?
6. Rapid response in cases of smoke poisoning
7. Poisoning from industrial compounds can cause similar effects to ALS
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Waterfowl poisoning halved by lead shot prohibition
(Date:6/23/2017)... N.Y. and ITHACA, N.Y. ... ) and Cornell University, a leader in dairy research, ... with bioinformatics designed to help reduce the chances that ... With the onset of this dairy project, Cornell University ... Consortium for Sequencing the Food Supply Chain, a food ...
(Date:5/16/2017)... --  Bridge Patient Portal , an enterprise patient ... Systems , an electronic medical record solutions developer ... a partnership to build an interface between the ... products, including Centricity Practice Solution (CPS), Centricity Business ... integrations will allow healthcare delivery networks using GE ...
(Date:4/18/2017)... a global expert in SoC-based imaging and computing solutions, has developed ... the company,s hybrid codec technology. A demonstration utilizing TeraFaces ® , ... showcased during the upcoming Medtec Japan at Tokyo Big Sight April ... Vegas Convention Center April 24-27. ... Click here for an image of the M820 ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... PA (PRWEB) , ... October 10, 2017 , ... ... City Science Center’s FirstHand program has won a US2020 STEM Mentoring Award. Representatives ... the award for Excellence in Volunteer Experience from US2020. , US2020’s mission is ...
(Date:10/10/2017)... DALLAS , Oct. 10, 2017 International research firm ... IoT Strategy, will speak at the TMA 2017 Annual Meeting , ... key trends in the residential home security market and how smart safety ... ... "The ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM ... firm for the life sciences and healthcare industries, announces a presentation by Subbu ... , The presentation, “Automating GxP Validation for Agile Cloud Platforms,” will present a ...
(Date:10/9/2017)... SAN DIEGO , Oct. 9, 2017 /PRNewswire/ ... a biological mechanism by which its ProCell stem ... of critical limb ischemia.  The Company, demonstrated that ... the amount of limbs saved as compared to ... of the molecule HGF resulted in reduction of ...
Breaking Biology Technology: