images from noaa ocean explorer: please do not use images from this presentation without permission...
TRANSCRIPT
Images from NOAA Ocean Explorer: http://oceanexplorer.noaa.gov/please do not use images from this presentation without permission of source
Deepsea Trawling:Blind Destruction of Last Frontier
Rainer FroeseLeibniz Institute of Marine Sciences
(some slides courtesy of Karen Stocks and Daniel Pauly)
Overfishing the Northeast Atlantic(Froese & Pauly 2003)
0%
25%
50%
75%
100%
1974 1978 1982 1986 1990 1994 1998
Years
Per
cen
t o
f IC
ES
Fis
her
ies
43%3.9 years
28%5.1 years
Undeveloped
Developing
Fully exploited
Overfished
Collapsed
There is Life in the Deep
However
• Most of the deepsea is unknown• Undersea mountains (seamounts)
are oases in the deep• On some seamounts over 30% of
the species occur nowhere else
Biologically UniqueBiologically Unique
Living Fossils
This sea lily was thought extinct since 100 million years
Long lived species
This spicule is from a sponge
2 m tall and 440 years old
Images and age estimates from B. Richer de Forges and collaborators
Deepsea Animals Are Typically
• Medium-sized carnivores• Long-lived (some over 100 years)• Late maturing (some with 30-50 years)• Slow growing• Vulnerable (typically only 5% per year
may be taken)• Mostly unknown (often bizarre)
Deepsea Fishing around Europe(ICES data 1998-2000)
Country/Species Orange roughy
Trichiurids(H & L)
Greenlandhalibut
Faroe Islands X X X
France X X
Germany X
Iceland X
Norway X
Portugal X X
Spain X X
UK X X