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Daily News Blog

27
Jul

Pesticides Detected in Long Island Sound Lobsters for the First Time

(Beyond Pesticides, July 27, 2012) A Connecticut state Department of Energy and Environmental Protection study has detected residues of mosquito control pesticides in lobsters pulled from Long Island Sound. Using new testing technology that can detect small concentrations of substances, ten lobsters were tested for three common mosquito control chemicals: malathion, methoprene, and resmethrin. Positive results were found in the organ tissue of one lobster for methoprene and three lobsters for resmethrin. The results present the first scientific evidence that pesticides may be affecting lobsters in the Sound and are likely to further anger the Connecticut lobstering industry which, for years, has been pointing to mosquito pesticides as a likely cause of a serious decline in the lobster population of the Sound, but has been met with resistance.

Late summer declines in the Sound’s lobster population have been alarmingly common throughout much of the last decade, devastating fishers and the local economy that depends on them. A number of factors have been blamed, but the lobstering community has increasingly been pointing to mosquito pesticides for several reasons. Some, such as methoprene, have a tendency to sink to the bottom of the ocean water, where lobsters live and feed. Additionally, lobsters are a distant cousin of mosquitoes, and the chemicals act on them in much the same way that they do insects. Finally, the western part of the sound was the hardest hit. Last fall, Connecticut lobster fishers called attention to the fact that New York State was spraying these chemicals as part of its West Nile virus (WNv) control program. Not only is the western end of the Sound the area that is closest to New York, but it is also one of the areas more protected from ocean currents that would normally help to wash the chemical out into the open sea.

In 2003, it was determined by researchers at the University of Connecticut that methoprene is deadly to lobsters at concentrations of only 33 parts per billion. The research was seized upon by the lobstering community as part of its quest to seek legal recourse against chemical companies whose pesticides they blamed for widespread lobster deaths in 1999.

The fishing community has been pushing state lawmakers in Connecticut, which emphasizes least-toxic controls for mosquitoes, to open a dialogue around the issue with their counterparts in New York. Connecticut State Representative Terry Backer (D-Stratford) has taken up the fight, arranging meetings on the issue and gathering affected parties. Backer also directs a local non-profit organization that works on issues of water quality in the Sound and has called for the reintroduction of a bill that would further restrict mosquito pesticides in the state.

The WNv control plan adopted by one county on Long Island, Suffolk County, was highly controversial when first passed, partly over its planned use of methoprene. Despite major objections from other county agencies, environmentalists, and members of Suffolk’s Council on Environmental Quality (CEQ), the County Legislature passed the plan in 2007. The CEQ advises lawmakers on the environmental impact of proposed county projects and while their recommendations are non-binding, the legislature has generally followed the group’s advice. Approval of the plan caused several members of the CEQ to resign in protest.

The effect of mosquito pesticides on marine life, especially lobsters, has repeatedly come under scrutiny over the years, in Connecticut as well as in other northeastern waters, such as the Bay of Fundy. Some of the other mosquito killing chemicals suspected of causing damage to aquatic life include cypermethrin and malathion. Both are already known to be toxic to many aquatic species, including crustaceans.

Resmethrin is a synthetic pyrethroid pesticide. Pyrethroid class chemicals are synthetic versions of pyrethrin, a natural insecticide found in certain species of chrysanthemum. In addition to the serious environmental concerns surrounding their use, they can also present great risk to human health. They were initially introduced on the market as â€Ëœsafer’ alternatives to the heavily regulated and highly toxic organophosphates such as chlorpyrifos and diazinon, which were banned for residential use in 2001 and 2004, respectively. However, exposure to synthetic pyrethroids has been reported to lead to headaches, dizziness, nausea, irritation, and skin sensations. EPA classifies permethrin and cypermethrin as possible human carcinogens, based on evidence of lung tumors in lab animals exposed to these chemicals. Synthetic pyrethroids have also been linked to respiratory problems such as hypersensitization, and may be triggers for asthma attacks.

Communities and agencies in New York have taken a stand against unnecessary pesticide spraying in the past, in areas such as pesticide free state parks and safe school playing fields. Some would argue that the states’ outdated mosquito management scheme is inconsistent with these past actions, and that it is time to bring it in line, not only with other policies in the state regarding pesticide use, but also with the wealth of knowledge and evidence concerning the harmful effects of pesticides on human health and the environment, as well as nearby local economies.

Other municipalities around the country have consistently proven that dangerous pesticides are not necessary to effectively control mosquitoes and prevent outbreaks of West Nile virus. Prevention strategies, such as removing standing water and using least-toxic larvicides only as a last resort, have been adopted in such densely populated areas as Shaker Heights, OH and the District of Columbia. To learn more about safe and effective mosquito management strategies, visit Beyond Pesticides’ page on Mosquitoes and Insect Borne Diseases.

Source: Connecticut Mirror

Image credit: Flickr user rexhammock

All unattributed positions and opinions in this piece are those of Beyond Pesticides.

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