Featured Research

from universities, journals, and other organizations

Lifestyle of a killer: In wild European brown shrimp, parasitic dinoflagellates have bacteria-like endosymbionts

Date:
September 7, 2012
Source:
BioMed Central Limited
Summary:
Parasitic dinoflagellates of the genus Hematodinium are a big problem for crab, prawn and shrimp fisheries across the world. New research has found that, in wild European brown shrimp (Crangon crangon), these parasites have bacteria-like endosymbionts. The presence of these endosymbionts indicates a previously unknown side to the lifecycle of Hematodinium.

Parasitic dinoflagellates of the genus Hematodinium are a big problem for crab, prawn and shrimp fisheries across the world.
Credit: Dr. Grant Stentiford

Parasitic dinoflagellates of the genus Hematodinium are a big problem for crab, prawn and shrimp fisheries across the world. New research published in BioMed Central's open access journal Aquatic Biosystems has found that, in wild European brown shrimp (Crangon crangon), these parasites have bacteria-like endosymbionts. The presence of these endosymbionts indicates a previously unknown side to the lifecycle of Hematodinium.

Related Articles


Hematodinium sp. and its sister species H. Perezi are a real problem for blue crab fishers , causing 'bitter crab' disease, and are thought to be responsible for the decline of blue crabs in Chesapeake Bay. But they are not fussy. Over 40 species of crustaceans are known to be infected by these nasty parasites.

A collaboration between researchers at the European Union Reference Laboratory for Crustacean Diseases (CEFAS) and the Virginia Institute of Marine Sciences (VIMS) identified the parasite responsible for causing sickness in wild European brown shrimp, collected from the North Sea, as Hematodinium sp.. These shrimp had lost carapace transparency and their blood (haemolymph) had lost the ability to clot. The invading Hematodinium had also infiltrated the muscles, destroyed internal organs, and the infection had damaged the shrimp's ovaries, affecting their ability to reproduce. Adding insult to injury the shrimp were also infected with Crangon crangon bacilliform virus (CcBV).

Further investigation revealed that two of the lifestages of the parasite were present in these shrimp, trophont (the adult, mobile stage) and dinospore (the infectious stage). However, for the first time, the dinospores were themselves seen to be infected with bacteria-like cells both in the cytoplasm and inside the nucleus.

Dr Grant Stentiford from Cefas explained, "The symbionts inside Hematodinium sp. appeared to make no difference to the ability of the parasite to infect shrimp. However, for these relationships to survive the endosymbiont must supply an evolutionary advantage. It seems most probable that the endosymbiont in some way increases the chance of the dinoflagellate to survive outside the shrimp, and successfully transfer to a new host. One of the problems with Hematodinium infection is that we do not yet fully understand their lifecycles. The role of this endosymbiont to its survival may be the key to controlling infections in species of farmed crustaceans."


Story Source:

The above story is based on materials provided by BioMed Central Limited. Note: Materials may be edited for content and length.


Journal Reference:

  1. Grant D Stentiford, Kelly S Bateman, Michelle Pond, Hamish J Small and Anette Ungfors. Hematodinium sp. and its bacteria-like endosymbiont in European brown shrimp (Crangon crangon). Aquatic Biosystems, 2012; (in press)

Cite This Page:

BioMed Central Limited. "Lifestyle of a killer: In wild European brown shrimp, parasitic dinoflagellates have bacteria-like endosymbionts." ScienceDaily. ScienceDaily, 7 September 2012. <www.sciencedaily.com/releases/2012/09/120906203351.htm>.
BioMed Central Limited. (2012, September 7). Lifestyle of a killer: In wild European brown shrimp, parasitic dinoflagellates have bacteria-like endosymbionts. ScienceDaily. Retrieved January 30, 2015 from www.sciencedaily.com/releases/2012/09/120906203351.htm
BioMed Central Limited. "Lifestyle of a killer: In wild European brown shrimp, parasitic dinoflagellates have bacteria-like endosymbionts." ScienceDaily. www.sciencedaily.com/releases/2012/09/120906203351.htm (accessed January 30, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Friday, January 30, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Nanoscale Sensor Could Help Wine Producers and Clinical Scientists

Reuters - Innovations Video Online (Jan. 30, 2015) A nanosensor that mimics the oral effects and sensations of drinking wine has been developed by Danish and Portuguese researchers. Jim Drury saw it in operation. Video provided by Reuters
Powered by NewsLook.com
Discovery Of 'Dragon' Dinosaur In China Could Explain Myths

Discovery Of 'Dragon' Dinosaur In China Could Explain Myths

Newsy (Jan. 30, 2015) A long-necked dinosaur from the Jurassic Period was discovered in China. Researchers think it could answer mythology questions. Video provided by Newsy
Powered by NewsLook.com
Poll Says Firstborn Is Responsible, Youngest Is Funnier

Poll Says Firstborn Is Responsible, Youngest Is Funnier

Newsy (Jan. 30, 2015) According to a poll out of the U.K., eldest siblings feel more responsible and successful than their younger siblings. Video provided by Newsy
Powered by NewsLook.com
Brawling Pandas Are Violently Adorable

Brawling Pandas Are Violently Adorable

Buzz60 (Jan. 29, 2015) Video of pandas play fighting at the Chengdu Research Base in China will make your day. Mara Montalbano (@maramontalbano) shows us. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins