Guide of FISH PPT

CAT.INIST
Résumé / Abstract Recently, elevated dioxin levels, over 5 parts per trillion (ppt) 2, 3, 7, 8-tetrachlorodibenzo-p-dioxin (TCDD), from Agent Orange was riported in 95% of 43 selected residents of Bien Hoa City, a city in southern Vietnam near a former air base used for Agent Orange-spraying missions, Agent Orange herbicide, contaminated with TCDD, was sprayed in Vietnam between 1962 and 1971 primarily for use as a defoliant.
Typical blood TCCD levels are 2 ppt in Vietnamese, but levels are as high as 413 ppt in Bien Hoa City.
Extremely elevated soil TCDD samples, over 1 million ppt, and elevated TCDD in sediment were found in some nearby areas such as Bien Hung Lake.
However, in our prior studies in Bien Hoa, food was unavailable for dioxin analysis so the route of intake was not confirmed, In the 1970s, while Agent Orange was still being sprayed, elevated human milk TCDD levels as high as 1850 were detected in milk from Vietnamese people living in Agent Orange-sprayed areas where consumption of fish was high.
Furthermore, also in the 1970s, elevated TCDD levels (up to 810 ppt) were found in fish and shrimp from the same area as the milk donors.
In the 1980s, we found elevated TCDD and also other organohalogen levels in human tissue, pork, fish, a turtle, and a snake in Southern Vietnam.


FISH PPT

CAT.INIST
Résumé / Abstract Low-salinity adaptability was investigated in a flatfish spotted halibut Verasper variegatus during the period from late metamorphic larvae to early juveniles by a 20-day rearing experiment under different salinity regimes (1, 4, 8, 16 and 32 ppt).
Most of the fish exposed to over 4 ppt survived for 20 days, but all the fish exposed to 1 ppt died within 5 days.
Fish kept in intermediate salinities (8, 16 ppt) grew significantly better than those in the control group (32 ppt).
Fish exposed to 4 ppt attained almost the same body length as the control group at 20 days after transfer, although these fish showed an abnormally dark body color as well as delayed development.
These results suggested that spotted halibut has a high-adaptability to low-salinity environments and prefers an intermediate salinity near iso-osmolality (about 12 ppt) from the late metamorphic larval stage, but does not completely adapt to a hypoosmotic of 4 ppt salinity or less than half of the osmolality.
The percentage of PRL-cell volume to pituitary volume was significantly higher at 4 ppt than in the control group.
The chloride cells in gill filaments were significantly larger at 4 ppt than in the control group.

.

info: FISH PPT


Benefits



FISH PPT:

NWFSC Science Symposium - Northwest Fisheries Science Center
"From Chemical Warfare, Spies and Drugs, and the Tropics to the Cold North Pacific: A History of Marine Biotoxin Research at the NWFSC" (ppt)—John Wekell.
"Big Picture, Smaller Snapshot: an Overview and Example of Social Science Research at the NWFSC" (ppt)—Karma Norman.
"Marine Growth Rate of Juvenile Salmon and its Relationship to Adult Return" (ppt)—Brian Beckman.
"Salmon Population Viability in an Uncertain Future: Prognosticating Impacts of Climate and Hydropower" (ppt)—Rich Zabel.
"Recolonization of the Cedar River, WA by Pacific Salmon: Genetic to Ecosystem–Level Effects" (ppt)—Peter Kiffney.
"The Perils of Point Estimates: Effective Scientific Presentation in the Face of Uncertainty and Human Psychology" (ppt)—Ian Stewart.
"Looking to the Future—A Report from the Research Planning Team" (ppt)—Michelle McClure.
"Conservation Hatchery Effects on Steelhead in Hood Canal" (ppt)—Barry Berejikian.
"Effects of Hatchery Rearing on Behavioral Diversity—Some Tests with Rockfish and Steelhead" (ppt)—Jonathan Lee.