A tuna has sold for $175,000 (US) in Tokyo’s fish market. This is the highest price paid for a fish in nine years. It was caught off the main island of Honshu, which is famed for its high quality fish. It is most likely to end up as Sushi. Is this a good sign or just plain luck?
I just browsed over an article in Science Daily that was relevant to a paper I just submitted. In my paper I used baited underwater video to assess fish populations between night and day. This study, by researchers at the University of Victoria, used similar video techniques to investigate how the use of traditional SCUBA diver surveys may not be the best way to monitor fish populations, if we want to know the evolutionary effects of overfishing. Fish become misrepresented with many fish species avoiding the observers (and I bet other non-target species been quite inquisitive and therefore been overrepresented).
Similar studies have shown the same outcome. Previous work at the Leigh Marine Laboratory (New Zealand) has shown that when sound produced from the bubbles of SCUBA gear is eliminated fish are found in much higher numbers. So fish often know that the diver is present before the diver can see the fish, and therefore can choose to swim away. It would seem that perhaps the use of SCUBA divers is becoming a little outdated for quantifying fish populations, and we may see the use of video becoming more and more important in the future. Another method would be the use of sound to investigate fish populations, which may provide new insights into fish ecology and fish populations.
For article at science daily: http://www.sciencedaily.com/releases/2009/07/090720111446.htm
Hello World. I am writing to you from New Zealand where I have been residing for the last year. I graduated with my PhD two years ago from the University of Auckland where I worked at the Leigh Marine Laboratory investigating nocturnal fish. I then did a one year postdoc in the USA in Rhode Island looking at the sensory basis for feeding in a freshwater Lake Malawi Cichlid. Now I am about to head off to Newfoundland, Canada. where I will be investigating the effects of turbidity on fish feeding.
The aim of this blog is to keep me updated with the overall fish literature. My passion is all things fish. I know that in science you can become focused and I want to have some means of keeping me looking at the general literature. This is what this blog is about.