HOME >> BIOLOGY >> NEWS
Census of Marine Life historians detail collapse of bluefin tuna population off northern Europe

Ocean historians affiliated with the Census of Marine Life have painted the first detailed portrait of a burst of fishing from 1900 to 1950 that preceded the collapse of once abundant bluefin tuna populations off the coast of northern Europe.

The chronicle of decimation of the bluefin tuna population in the North Atlantic is being published as other affiliated researchers release the latest results of modern electronic fish tagging efforts off Ireland and in the Gulf of Mexico, revealing remarkable migrations and life-cycle secrets of the declining species.

Tuna Past: Case of the Disappearing Bluefins

Dusting off sales records, fishery yearbooks and other sources, researchers Brian R. MacKenzie of the Technical University of Denmark and the late Ransom Myers of Canadas Dalhousie University show majestic bluefins teemed in northern European waters (North Sea, Norwegian Sea, Skaggerak, Kattegat, and Oresund ) for a few months each summer until an industrialized fishery geared up in the 1920s and literally filled the floors of European market halls with them.

The research, to appear in a special edition of the peer-reviewed journal Fisheries Research, shows that generations ago Atlantic bluefins typically arrived in the northern waters by the thousands in late June and departed by October at the latest, their foraging travels likely related to seasonal warming.

Danish fishers from the mid-1800s welcomed the bluefin tuna as a partner in the catch of the garfish species. The bluefins pursued garfish into nets that fishers set close to shore.

Before World War I, the bluefins were rarely captured and even coastal sightings were exciting events. One measuring 2.7 meters (almost 9 feet) washed up on a German shore in 1903. Those captured in the 1920s ranged from 40 kilograms to giants of 700 kilograms, with an average weight of 50 to 100 kilograms.

After World War I, ever better know-ho
'"/>

Contact: Terry Collins
terrycollins@rogers.com
416-538-8712
Census of Marine Life
5-Aug-2007


Page: 1 2 3 4 5 6

Related biology news :

1. First Biodiversity Census of coral reef ecosystems in the NW Hawaiian Islands
2. Census of Marine Life US National Committee hosts 2006 Marine Biodiversity Workshop
3. Fish with chips reporting from ocean top highlights at Census of Marine Life mid-point
4. Census of Marine Life explorers surprised by diversity, density of Arctic creatures
5. Census of Marine Life - Discoveries and Highlights 2004: Scientists add 4m+ records, 13,000 species
6. Marine worm opens new window on early cell development
7. Marine phytoplankton changes form to protect itself from different predators
8. German-Korean collaboration in Polar and Marine research will be intensified
9. Marine reserves could save coral reefs
10. Marine scientists monitor longest mammal migration
11. Elsevier launches new journal, Marine Genomics

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


(Date:6/6/2019)... ... 05, 2019 , ... Pelican BioThermal , the global ... service center in Mexico City, Mexico. Mexico is the second largest pharmaceutical market ... $1.75 billion in pharmaceutical exports since 2015. The Mexico City network station will ...
(Date:6/4/2019)... ... June 04, 2019 , ... ... salient features of seizure risk signals, usually based on variations of amplitude, frequency ... the only acceptable diagnostic methodology due to the complexity and variability of the ...
(Date:5/31/2019)... ... May 30, 2019 , ... Researchers ... Mayo Clinic, have documented significant differences in the prevalence of hereditary genetic mutations, ... compared to non-Hispanic White women. Results will be presented at the 2019 American ...
Breaking Biology News(10 mins):
(Date:5/31/2019)... ... May 30, 2019 , ... A ... an efficient delivery system for the sustained release of human placental stem cell ... system was able to deliver CM into the injured kidney, where it helped ...
(Date:5/14/2019)... ... May 13, 2019 , ... Leak Detection Associates ... the Pharmaceutical, Biotechnology, Medical Device and Food Packaging Industries’ is excited to announce ... to improve LDA’s ability to communicate directly with the marketplace; serving as a ...
(Date:5/4/2019)... N.J. (PRWEB) , ... May 03, 2019 , ... ... announces the release of the Diopsys® ffERG/Photopic Negative Response vision test, ... glaucoma. , By 2050, it is estimated that 6.3 million Americans will have ...
(Date:5/2/2019)... ... May 02, 2019 , ... Boston Robotic Hair ... area. Gone are the days of painful hair transplant procedures. Boston Robotic Hair ... is the only robotic intelligent solution to offer a minimally invasive procedure. With ...
Breaking Biology Technology:
Cached News: