Featured Research

from universities, journals, and other organizations

Sardines and horse mackerel identified using forensic techniques

Date:
May 24, 2011
Source:
Plataforma SINC
Summary:
Researchers have used forensic mitochondrial DNA species identification techniques to distinguish between sardines and horse mackerel. This method makes it possible to genetically differentiate between the fish, even if they are canned or processed, which makes it easier to monitor the degree to which fisheries resources are being exploited.

A team of researchers from Galicia in Spain have used forensic mitochondrial DNA species identification techniques to distinguish between sardines and horse mackerel. This method makes it possible to genetically differentiate between the fish, even if they are canned or processed, which makes it easier to monitor the degree to which fisheries resources are being exploited.

DNA from the mitochondria -- cell organelles -- is ideal for distinguishing between species. One of its components in particular, cytochrome b, is a genetic marker that scientists use to establish relationships between genera and families, and is also used by some forensic laboratories to identify animals that appear at crime scenes (cats or insects, for example).

Now, for the first time, researchers from the National Association of Manufacturers of Canned Fish and Shellfish (ANFACO-CECOPESCA, Spain) have used this technique in order to genetically identify small pelagic (non-coastal) species, such as sardines and horse mackerel. This study was supported by the European Fisheries Fund (EFF) and Spain's Ministry of the Environment and Rural and Marine Affairs (MARM).

"These molecular tools represent a great step forward for the sector, since they enable fisheries imports to be monitored and tracked, and also ensure they are correctly labelled," Montserrat Espiñeira, a biologist for ANFACO-CECOPESCA and lead researcher of the study, said.

By using this method, the team was able to identify more than 20 species from the sardine group (genera such as Sardina, Sardinella, Clupea, Ophistonoma and Ilisha) and a similar number of horse mackerel species (Trachurus, Caranx, Mullus, Rastrelliger and others), originating from seas all over the world.

The methodology involved gathering a sample of mitochondrial DNA from the fish (even if it was canned or processed), amplifying a fragment of cytochrome b (using a polymerase chain reaction -- PCR) and, lastly, carrying out a phylogenetic analysis by obtaining a "forensically informative nucleotide sequencing" (FINS).

The research on the sardines was published this month in the journal European Food Research and Technology, while the one on the horse mackerel was issued in March in the Journal of Agricultural and Food Chemistry.

The researchers are now focusing on analysing the distinct organoleptic, microbiological, physical-chemical and nutritional properties of the species analysed, and are also looking into whether some currently unexploited species could be of interest from a consumer perspective. "The end goal is to improve the management of fisheries resources and ensure they are sustainably exploited," explains Espiñeira.

The team is also developing rapid molecular identification methodologies (based on the Real Time-PCR technique), which will make it possible to distinguish between the most commercially-valuable small pelagic fish species -- the European anchovy (Engraulis encrasicolus), the European sardine (Sardina pilchardus) and the main species of horse mackerel (Trachurus trachurus) -- simply and in less than three hours.


Story Source:

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


Journal References:

  1. Fátima C. Lago, Beatriz Herrero, Juan M. Vieites, Montserrat Espiñeira. FINS methodology to identification of sardines and related species in canned products and detection of mixture by means of SNP analysis systems. European Food Research and Technology, 2011; DOI: 10.1007/s00217-011-1481-1
  2. Fátima C. Lago, Beatriz Herrero, Juan M. Vieites, Montserrat Espiñeira. Genetic Identification of Horse Mackerel and Related Species in Seafood Products by Means of Forensically Informative Nucleotide Sequencing Methodology. Journal of Agricultural and Food Chemistry, 2011; 59 (6): 2223 DOI: 10.1021/jf104505q

Cite This Page:

Plataforma SINC. "Sardines and horse mackerel identified using forensic techniques." ScienceDaily. ScienceDaily, 24 May 2011. <www.sciencedaily.com/releases/2011/05/110524114955.htm>.
Plataforma SINC. (2011, May 24). Sardines and horse mackerel identified using forensic techniques. ScienceDaily. Retrieved April 20, 2014 from www.sciencedaily.com/releases/2011/05/110524114955.htm
Plataforma SINC. "Sardines and horse mackerel identified using forensic techniques." ScienceDaily. www.sciencedaily.com/releases/2011/05/110524114955.htm (accessed April 20, 2014).

Share This



More Plants & Animals News

Sunday, April 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Mich. Boy Unearths 10,000-Year-Old Mastodon Tooth

Mich. Boy Unearths 10,000-Year-Old Mastodon Tooth

Newsy (Apr. 20, 2014) — A 9-year-old Michigan boy was exploring a creek when he came across a 10,000-year-old tooth from a prehistoric mastodon. Video provided by Newsy
Powered by NewsLook.com
Vermont Goat Meat Gives Refugees Taste of Home

Vermont Goat Meat Gives Refugees Taste of Home

AP (Apr. 18, 2014) — Dairy farmers and ethnic groups in Vermont are both benefiting from a unique collaborative effort that's feeding a growing need for fresh and affordable goat meat. (April 18) Video provided by AP
Powered by NewsLook.com
Man Claims He Found Loch Ness Monster With... Apple Maps?

Man Claims He Found Loch Ness Monster With... Apple Maps?

Newsy (Apr. 18, 2014) — Andy Dixon showed the Daily Mail a screenshot of what he believes to be the mythical beast swimming just below the lake's surface. Video provided by Newsy
Powered by NewsLook.com
First Ever 'Female Penis' Discovered In Animal Kingdom

First Ever 'Female Penis' Discovered In Animal Kingdom

Newsy (Apr. 18, 2014) — Not only are these newly discovered bugs' sex organs reversed, but they also mate for up to 70 hours. Video provided by Newsy
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:
from the past week

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