HOME >> BIOLOGY >> NEWS
Stratified seawater disrupts the transport of imposex substances

Biologists from the Netherlands Institute for Sea Research (NIOZ) have discovered that toxic substances from antifouling paint on ships, do not reach the seabed directly if the sea is vertically stratified in different layers. The toxic substances cause the growth of male sexual characteristics in female snails on the seabed.

The ecotoxicologists from the Netherlands Institute for Sea Research investigated the relationship between shipping and imposex in snails. Imposex is an abnormality in snails of the seabed, resulting in male sexual characteristics in females. Imposex is most prevalent in and around harbours. In 1991, the Netherlands Institute for Sea Research demonstrated that the phenomenon also occurs on a worldwide basis in open seas, particularly near busy shipping lanes.

However, the clear relationship between pollution from shipping and damage to local seabed life does not appear to apply when the water is stratified year round. To the north of the Dogger Bank and in the Atlantic Ocean near Spain and Portugal, the researchers did indeed find imposex but not always precisely where the shipping was busiest.

The ecotoxicologists concluded that the harmful substance in antifouling paint, TBT (Tributyl Tin), was not able to sink though the boundaries between seawater layers. The boundary between two layers is clear-cut and can be seen underwater as a reflecting surface. The organotin compound TBT is probably not the only toxic substance whose distribution to the seabed is disrupted by such boundary layer between two seawater layers. Researchers studying the effects of pollution in the sea surface on seabed life will need to take this into consideration.

Stratification most often occurs as a result of warm water floating on top of cold water. Less saline water from the Baltic floats on top of heavier, more saline Atlantic water. Near Spain and Portugal the water is composed of several layers, which differ in temperature and salt content
'"/>

Contact: Michel Philippens
philippens@nwo.nl
31-70-344 0784
Netherlands Organization for Scientific Research
24-Jan-2002


Page: 1 2

Related biology news :

1. Strep disrupts blood clotting to infect humans
2. To avoid detection, HIV disrupts immune cell migration
3. Popular weed killer disrupts frogs sexual development
4. Popular weed killer demasculinizes frogs, disrupts their sexual development
5. Asian elephant sex pheromone transporter revealed
6. Two molecules work together to aid transport of immune cells, UT Southwestern researchers find
7. How amphetamine affects the dopamine transporter
8. Researchers reveal calcium transport protein function that regulates heartbeat frequency, strength
9. UCLA researcher first to solve structure of membrane transport protein
10. First structure of transporter enzyme family is solved
11. Barrel structure in globular proteins may transport small molecules

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/14/2019)... ... ... Reck of Veterinary Medical Center of Fort Mill has recently begun providing ... own geriatric Australian Shepherd, Simon, was treated in June 2019 for osteoarthritis in his shoulders, ... was weak, and he struggled to play fetch and other games with his family. ...
(Date:8/6/2019)... ... August 06, 2019 , ... ... cell manufacturing with clinical, regulatory and GMP manufacturing experience. In November it ... (PSC). With extensive regulatory experience and one of the first cGMP ...
(Date:8/6/2019)... ... August 06, 2019 , ... The demand for plant-based ... in particular quickly entered the limelight – meat alternatives. Yet, to make these ... emulsifying ingredient such as methyl cellulose. This ingredient is highly synthetic. Having a ...
Breaking Biology News(10 mins):
(Date:7/23/2019)... WHITEHOUSE, N.J. (PRWEB) , ... July 22, 2019 ... ... pharmaceutical and biotech companies with best-in-class services in the fields of 3D ... and machine learning , Visikol initially started back in 2013 as a ...
(Date:7/17/2019)... ... July 15, 2019 , ... CRISPR is often thought of ... trait can be removed, replaced, or edited, but Yiping Qi, assistant professor in Plant ... traditional applications in his latest publication in Nature Plants. In this comprehensive review, Qi ...
(Date:7/11/2019)... ... , ... At the most recent stem cell training course in ... the R3 Heroes Program. The Veterans included individuals and families from all over the ... nominate a military Veteran, teacher or first responder to receive a regenerative therapy at ...
(Date:7/2/2019)... ... July 02, 2019 , ... Leading Regenerative Veterinary Medicine company, ... Where Beasts Meet Biotech. The film focuses on regenerative veterinary medicine as a ... Pharm was recently included in the Brentwood and Pacific Palisades International Film ...
Breaking Biology Technology:
Cached News: