Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


ORC warns of possible emergence of toxic algal bloom

MEDIA RELEASE


December 3, 2012

ORC warns of possible emergence of toxic algal bloom

The Otago Regional Council (ORC) is warning people to be wary of the possible presence of toxic algae in rivers and lakes throughout the Otago region this summer.

ORC director of environmental information and science John Threlfall said toxic algae occurs naturally in a wide range of water quality conditions, including relatively clean waters. It is more likely to be present during the summer months than at any other time of the year.

In rivers, Phormidium is a common toxic algae which typically forms a thick brown-black slimy algae mat found on large rocks, stones, and cobbles, Dr Threlfall said

If the mats detach, they may float downstream to become caught up in other debris such as sticks. When the Phormidium mats die and dry out, they become light brown or white. Either fresh or dried, it can be highly toxic and harmful to humans and animals.
This is especially true for dogs, as they are particularly susceptible to poisoning from both mat-forming and free-floating toxic algae.

“Many dogs enjoy being in the water and can eat these algae intentionally or by accident, which can have tragic results,” Dr Threlfall said.

Symptoms of poisoning in animals exposed to the type of toxins present in Phormidium mats include lethargy, muscle tremors, fast breathing, twitching, paralysis, and convulsions. In extreme cases, death can occur within 30 minutes after signs first appear.

Toxic algal blooms are commonly blue-green in lakes or still water, but can also be red or yellow.

They typically form thick scums on the surface, and may also develop foams at the water's edge. In Otago toxic algal blooms in lakes do not occur regularly.

If an algal bloom is present, people have been known to develop allergic reactions such as asthma, eye irritations, rashes, blistering around the mouth and nose, and gastro-intestinal disorders, including abdominal pain, cramps, and diarrhoea.


Dr Threlfall said any reaction depends on the type of toxic algae, the type of toxins present, and the concentration of the toxin in the water.

“The higher the concentration of algae toxins and the longer the contact with the water, the more severe the symptoms are likely to be,” he said.


Where humans become ill or are suspected of being ill after swallowing water containing algal bloom, medical advice should be sought immediately. Likewise, if animals become sick, a veterinarian should be contacted.


© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

TV3 Videos: Key's Flip-Flop Over Whale Oil Texts | Slater
Reaction: Greens | More
Dim-Post Link: The Very Odd Slightly Left Of Centre

Gordon Campbell: On Government Arrogance

Right now, National is ramming anti-terrorism measures through Parliament. This legislation will grant the SIS the power to carry out 48 hour bouts of surveillance on anyone without a warrant, and will bestow on government the power to unilaterally revoke anyone’s passports and thus deny them the freedom to travel.

Ludicrously, the public has been given exactly one day to make submissions on these major infringements of their civil liberties. Despite Finlayson’s misleading signals on RNZ that these are only stopgaps until next year’s full review of our security laws, the measures in question will not, in fact, expire until 2018.

Why the insane rush? Good question. More>>

 
 

Parliament Today:

Key Texts With Whale Oil Released: PM Can’t Be Trusted Over Dirty Politics Defence - Greens

John Key’s answers to questions about dirty politics can’t be trusted, after he was forced to admit that he had misled journalists and Parliament about contact with attack blogger Cameron Slater, said the Green Party today.. More>>

ALSO:

Temporary Release Crackdown Continues: Corrections Review Of Phillip Smith Case

“The review by Corrections’ Chief Custodial Officer reveals that the plan for Smith’s series of temporary releases was overly ambitious and misinformed. He’s a highly manipulative and deceptive person who although technically eligible, should not have been considered for temporary release." More>>

ALSO:

White Ribbon Day: Govt Resumes Sexual Violence Trial Proceedings Work

Justice Minister Amy Adams has asked the Law Commission to resume work on proposals for better supporting victims of sexual violence through the criminal process. The Law Commission will revisit its previous work on alternative pre-trial and trial processes to identify options for improving complainants’ experience in court. More>>

ALSO:

"New Faces, Wise Heads": Andrew Little Announces New Labour Line Up

Labour Leader Andrew Little today announced a bold new caucus line up which brings forward new talent and draws on the party’s depth of experience. More>>

ALSO:

Gordon Campbell: On Rick Ellis As Te Papa’s New CEO

The recent appointment of former TVNZ boss Rick Ellis to head Te Papa has copped a fair bit of criticism. Much of it has been inspired by the suspicion that Ellis has been hired to pursue the same purely commercial goals as he did at TVNZ, while similarly neglecting the serious cultural side of his mandate. More>>

Passport Cancellation, Surveillance: Draft 'Foreign Fighters Legislation' Released

The final draft of the Countering Terrorist Fighters Legislation Bill contains proposals previously announced by Mr Key in a major national security speech earlier this month. More>>

ALSO:

Related

Joint Statement: Establishment Of NZ-China Strategic Partnership

At the invitation of Governor-General Lt Gen The Rt Hon Sir Jerry Mateparae and Prime Minister The Rt Hon John Key of New Zealand, President Xi Jinping of the People’s Republic of China made a state visit to New Zealand from 19 to 21 November 2014... More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news