Posts Tagged ‘Research’

Mar 22, 2010

How Fast Can Dolphin Fish Grow?

Guy Harvey t-shirts capture the color and motion of the magnificent Bull Dolphin

Guy Harvey t-shirts capture the color and motion of the magnificent Bull Dolphin

Dolphin fish, also known as mahi mahi or dorado, are abundant worldwide and are the most often caught offshore gamefish.  They are prized not only for their table fare, but also for their acrobatics during the fight, and for their neon colors that range from vibrant greens to blues to yellows.  Nobody captures the dorado’s movements and colors like Guy Harvey does as evidenced by his painting titled “Bull Dolphin” where an excited mahi mahi is all lit up while chasing a school of flying fish.

Mahi mahi are known to be short lived and fast growing, but you will be surprised to know just exactly how fast they are capable of growing.  My father Milt Shedd was the co-founder of SeaWorld Inc. where he served as its Board Chairman from 1964 until he retired in 1985.  One of his early responsibilities was to coordinate the collection of fish for SeaWorld.  On one trip he caught a number of small dorado weighing about 1.5 lbs.  He put them in an exhibit of schooling fish that contained anchovies and sardines.  The dolphin must have thought this tank was the dinner table, as food swam by them at all times. 

Dolphin fish are some of the fastest growing fish in the sea

Dolphin fish are some of the fastest growing fish in the sea

One big bull dolphin lived for 18 months and when it died there was no guessing of its weight as it was taken from the tank to a scale.  For years I have asked people including seasoned anglers, captains and marine biologists how much they thought the dolphin weighed after 18 months in the tank.  Not once has anybody guessed high enough.  In 18 months the 1.5 lb mahi mahi grew to an amazing 68 lbs. 

While they can’t grow that fast in the wild where food is not so easily available and where they would have to burn more calories catching it, this does prove just how fast a dorado is capable of growing.

Jan 10, 2010

The Guy Harvey Research Institute and Marine Conservation Science

Director of Guy Harvey Research Institute

Director of Guy Harvey Research Institute

Thank you so much for your patronage of Guy Harvey art inspired sportswear. Did you know that your purchase of this high quality fishing clothing and fishing t shirts helps our collective efforts on behalf of ocean conservation? Let me explain.

The oceans are a signature part of life on Planet Earth, including factors critical to human survival such as food resources and climate modulation. Most people who earn their livelihoods from the ocean or use it for their recreation are now well aware of the increasingly degraded state of marine ecosystems resulting from overfishing, coastal over-development, pollution and habitat destruction by humans.

But can anything be done to stop this degradation and even restore our marine ecosystems before these changes become irreversible?

Luckily, the answer is still yes and there is evidence to support this optimistic outlook. There is, however, also a strong “but” associated with this optimism – and that is corrective action can no longer be kept on the back burner on our environmental priority list. In fact, all credible science points to the fact that preventing irreversible damage to our oceans will need effective management and conservation actions to be implemented immediately and dynamically on a global scale.

Unfortunately, taking corrective action to restore the health of our oceans has been easier said than done because the issues involved are socioeconomically and scientifically complex. Adding to this complexity is that the oceans provide an average of 18% (developed countries) to 25% (developing countries) of the protein consumed by humans. And the demand for seafood continues to increase with growing human populations and space limitations for agriculture on land. Without urgent, major improvements in how we collectively manage and conserve our oceans worldwide, we face the alarming prospect that the health of earth’s marine ecosystems and fishery resources is quickly becoming strained beyond the point of recovery.

So what’s to be done to improve the state of our oceans?

The absolute foundation for improving ocean governance is the availability of solid scientific information on how marine ecosystems work, and a much larger segment of the public that is educated and passionate about and involved in ocean issues. And this is where we fall short.

Guy Harvey Research Institute

Guy Harvey Research Institute at Nova Southeastern University’s Oceanographic Center campus in Ft. Lauderdale, Florida

And this is where the Guy Harvey Research Institute (GHRI) and its sister organization, the Guy Harvey Ocean Foundation (GHOF) are playing major roles. Providing this critical foundation of marine ecosystem knowledge via high quality scientific research, university-level education and national and international dissemination of research findings to the general public via major media is the focus of the GHRI’s activities. The GHOF supports the scientific research of the GHRI as its research arm, and also focuses on public education and ocean advocacy activities via documentaries and new generation (social and web) media dissemination of marine conservation issues.

History of the Guy Harvey Research Institute

Dr. Guy Harvey, himself a marine biologist, has long recognized the foundational relationship between scientific knowledge and effective ocean governance. To advance this knowledge he established in 1999 the Guy Harvey Research Institute in collaboration with the Oceanographic Center at Nova Southeastern University in Florida. The mission of the GHRI is to play a global leadership role in providing the scientific information required for effective marine conservation. Its worldwide research work is supported by the Guy Harvey Ocean Foundation and various government and private foundation grants and individual donors who are passionate about the welfare of the earth’s oceans. A major and long-standing supporter of the GHRI’s scientific research activities is the AFTCO Mfg Co. Incorporated via its AFTCO Bluewater line of Guy Harvey sportswear. The GHRI is also part of the academic arm of the Oceanographic Center at Nova Southeastern University, and provides advanced training to U.S. and international students in marine conservation research. This research training focus is an important part of the GHRI’s activities in educating the future stewards of our ocean’s health.

As a guest blogger on this site, I will periodically report on the GHRI’s research activities and important new findings generally in marine science and conservation. Also, please visit our web sites for an overall perspective on what we do. I hope you will find this information to be of interest and it will spur you on to become and remain active supporters for protecting and restoring our fragile oceans and its ecosystems. Thank you again for supporting ocean conservation with your purchases. I hope you will wear your Guy Harvey sportswear with pride and the knowledge that you are making a difference!

Dec 14, 2009

Introducing Guest Blogger Dr Mahmood Shivji

Director of Guy Harvey Research Institute

Director of Guy Harvey Research Institute

We’re excited to add Dr. Mahmood Shivji to our list of contributors to the Guy Harvey Sportswear blog.  Dr. Shivji is the Director of the Guy Harvey Research Institute and Professor at Nova Southeastern University’s Oceanographic Center in Florida.

His research combines DNA- and field-based approaches to provide information essential for improving conservation and management of marine species. Dr. Shivji is an internationally recognized authority on shark and billfish conservation research, but if caught off guard – or plied with good red wine and dark chocolate – will admit to surreptitiously working on uncharismatic, tiny coral reef invertebrates also.

Dr Shivji Releasing Tiger Shark

Dr Shivji releasing tiger shark after tagging and DNA sampling

The research program he directs for the Guy Harvey Research Institute (GHRI) is global in scope. The GHRI’s research, including the amazing discovery that female sharks can give virgin birth and finding new species of sharks and billfish, have consistently received worldwide coverage in the major media, including the Economist, Time, Newsweek, the New York Times, the Washington Post, the BBC and National Public Radio. Dr. Shivji’s research on the shark fin trade and its impacts on shark populations is currently on display at the Smithsonian National Museum’s Ocean Hall in Washington DC.

We’re looking forward to his blog posts and know you will find them engaging as well!