Welcome to FIS   Sponsored By
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us

Three published studies inform on the evolutive history of migrations or the diet of some pelagic fish of the Mediterranean. (Photo: IEO)

Parasites used as natural indicators of fish ecology

Click on the flag for more information about Spain SPAIN
Tuesday, June 02, 2015, 03:30 (GMT + 9)

For several years a team of researchers from the Spanish Institute of Oceanography (IEO) has been studying the migration of marine organisms and their trophic relations in the Atlantic Ocean and the Mediterranean Sea.

Scientists believe that the knowledge of these aspects of the species ecology is crucial to the accurate assessment of fishery resources and for responsible exploitation.

Since 2008, parasitologists, veterinarians and ichthyologists of oceanographic centres of Baleares, Malaga, Murcia and Santander of IEO, Cavanilles Institute of Biology and Evolutionary Biology of the University of Valencia and the universities of Cagliari and Sassari (Sardinia, Italy), Istanbul (Turkey) and Malaga have been conducting studies on the use of parasites as natural markers of biology and ecology of fish having commercial interest.

"The conceptual basis of these techniques is that in certain phases of their life cycle, parasites, whose space-time distribution can be known, join the hosts and do not abandon until completing the life cycle, and therefore constitute biological brands that make it possible to deduce information about the ecology of the infected species," explains the IEO.

For example, one implementation of biological markers is the possibility to differentiate host resources with morphological characteristics and similar habits, and then reconstruct their evolutionary history.

In this regard, in 2014 the scientific team published a study on the parasitic fauna of the Scomber colias, a fish inhabiting the Atlantic and the Mediterranean in the journal Acta Parasitologica.

During this investigation, this species was compared with parasitological data of the other three resources belonging to the genus Scomber (S. australasicus and S. japonicus of the Indo-Pacific and S. scombrus of the North Atlantic).

The experts proved the existence of a "strict relation" between the sets of parasites characteristic of each species and its geographical distribution, which, according to the IEO, made it possible to improve the understanding of the evolutionary history of the genus.

The biological brands also provided information for the study of food webs that complement those that can be obtained from the direct analysis of preys found in the stomachs.

The parasites infecting the host through ingestion of certain species of preys will remain long in the host. Therefore, its detection implies that it was fed at some time of the intermediate host although the latter has not been detected in the stomach contents.

The team also studied parasites from the head of the bullet tuna Auxis rochei in the western Mediterranean.

As part of this study, whose results were published in the Journal of Helminthology in 2014, seven parasitic species were indentified, some of which belonged to the family Didymozoidae.

Infection levels of these parasites varied significantly with the size of the host. The scientists discovered that these differences could be attributed to changes in diet and/or habitat changes depending on the size, which contributed to a better understanding of the biology and ecology of this host species.

Finally, the study of biological markers could provide information on the migration of the host.

In 2014 the team published a study of the parasites of the bluefin tuna (Thunnus thynnus) gills of the eastern stock, which is reproduced in the Mediterranean, in the journal Folia Parasitological. There it was explained that the abundance of 11 species of parasites that were found differed depending on the size of the host and its capture area, being this an indication that the different sampling sites are considered discrete units.

By Analia Murias
[email protected]


Click to know how to advertise in FIS
Nov 21, 19:40 (GMT + 9):
Responsible managed oceans could provide six times more food than today (Video)
South Korea
Nov 21, 17:00 (GMT + 9):
Frozen skate wings imports register 49 percent less than the previous year
Nov 21, 17:00 (GMT + 9):
CEPESCA encourages environmentalists to work alongside the fishing industry
Nov 21, 16:20 (GMT + 9):
Cannery industry fear shortages of tuna for tax collection on foreign vessels
New Zealand
Nov 21, 16:00 (GMT + 9):
Plan to transform and improve inshore finfish fisheries management
Nov 21, 07:40 (GMT + 9):
Parliament receives pan-European petition to stop open net fish farming
Nov 21, 07:20 (GMT + 9):
Cermaq cooperates with Labeyrie to secure salmon traceability with blockchain
Nov 21, 06:20 (GMT + 9):
Foreign tuna vessels must deliver 30% of their catch within one year
Nov 21, 05:10 (GMT + 9):
Qatar seeks to boost development of fish farming industry
South Korea
Nov 21, 04:20 (GMT + 9):
Imports of whiteleg shrimp are down 62 percent in october
Nov 20, 20:40 (GMT + 9):
Fish Pool Salmon Price Status Report for week 47
Nov 20, 19:20 (GMT + 9):
IN BRIEF - New floating fish farm off Changi aims to produce more seafood than traditional coastal farms
United Kingdom
Nov 20, 19:20 (GMT + 9):
IN BRIEF - Gideon Pringle to leave Mowi Scotland
United Kingdom
Nov 20, 19:00 (GMT + 9):
IN BRIEF - Ocean could provide over six times more food than it does today
United Nations
Nov 20, 19:00 (GMT + 9):
IN BRIEF - Fishing vessels pushing vaquita porpoise to extinction: U.N. treaty head

Pirates in the Gulf of Mexico pretend to be fishermen and surprise their victims
Mexico The average monthly robbery in this year is 16, while in 2018 it was 144 cases, while in 2017 there were only 48 incidents Insecurity in Mexico has already reached sea levels. The assault this week o...
You don't eat black headed shrimp? Experts set out the reason for the 'black change': eat calmly
Taiwan When winter comes, the hot pot is more popular with the public, and meat and seafood are basic. It is only the shrimp that everyone puts most commonly in this country. Recently, the Internet has begun...
First Falklands' fishing company signs the 51% Joint Venture shareholding under the new ITQ criteria
Falkland Is. Ahead of the Falkland Islands Government Executive Committee decision recently setting out new criteria for Individual Transferable Quota (ITQ) extensions from 2021 to 2046 Beauchene Fishing Co Ltd an...
Fisheries industry seems part of Kim's drive to build economic independence
Korea D. People's R. North Korean state media released on Tuesday a report detailing a recent visit by leader Kim Jong-un to two fisheries, apparently underlining Kim's desire for economic independence. The visit is no...
Maruha Nichiro Corporation
Nichirei Corporation - Headquarters
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation - Wartsila Group Headquarters
ITOCHU Corporation -Headquarter-
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Sea Harvest Corporation (PTY) Ltd. - Group Headquarters
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
AquaChile S.A. - Group Headquarters
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods, Inc
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO - Food and Agriculture Organization - Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Brim Ltd (formerly HB Grandi Ltd) - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Mowi ASA (formerly Marine Harvest ASA) - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. - Headquarters
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
CJ Corporation  - Group Headquarters
Greenpeace International - The Netherlands | Headquarters
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
NOREBO Group (former Ocean Trawlers Group)
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation - Headquarters
Cooke Inc. - Group Headquarters
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart / Wal-Mart Stores, Inc. (Supermarket) -Headquarter-
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2019 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER