Bovine Hormone Could Provide Boost to Tilapia Aquaculture
In collaboration with Monsanto Chemical Company and California Sea Grant, Hawaii Sea Grant Director Gordon Grau is characterizing the efficacy and safety of Monsanto's recombinant bovine growth hormone in raising aquacultured tilapia. His research will help gather information essential for determining whether this hormone has practical value in improving production and in reducing costs in the aquaculture of finish and shellfish. Grau's laboratory has established the recombinant bovine growth hormone does have significant growth-promoting effects in tilapia. The studies indicate the recombinant bovine growth hormone may have considerable practical value in tilapia aquaculture, and studies are now aiming at developing a practical method for treatment of tilapia fry.
Contact: Gordon Grau, Director, Hawaii Sea Grant, Phone: (808) 956-7031;
Email: sg-dir@soest.hawaii.edu
Source:California Sea Grant Newsletter
Date:2003

Researchers Forecast Best Beach Nourishment Sand Dredging Sites
Sea Grant researchers say they can predict the physical impacts of dredging the ocean bottom for nourishment sand that is used to build up eroded coastal beaches. The key lies in finding the best location to dredge.

There are three major considerations: 1) A location close enough to the targeted beach to be economically feasible; 2) Nourishment sand must be a suitable grain size, at least as coarse as the native beach; and 3) Nourishment sand has to be sufficiently distant from the shore so that its removal doesn't modify currents and waves which could make the existing erosion process worse. Biological impacts have to be considered as well.

Paul Work, a South Carolina Sea Grant researcher at Georgia Tech Regional Engineering Program in Savannah, and George Voulgaris of the University of South Carolina have teamed up with their students
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Contact: Ben Sherman
sherman@nasw.org
202-662-7095
National Sea Grant College Program
24-Feb-2003