HOME >> BIOLOGY >> NEWS
Uncovering sex-change secrets of black sea bass

Durham, N.H. In a former cowshed on the edge of the University of New Hampshire campus, David Berlinsky, assistant professor of zoology, peers into a big blue plastic tub. Inside, black sea bass circle slowly in the dim light. The converted barn is now an aquaculture research facility for the College of Life Sciences and Agriculture, and home to Berlinsky's latest research.

Black sea bass feature prominently on many menus, but wild populations of the fish are in decline and their availability is limited. Because of the high demand, they're a good candidate for aquaculture on the east coast. Except, that is, for one problem: they have a tendency to change sex unpredictably in captivity.

"In the wild, black sea bass are born as females and turn into males at around two to five years old," Berlinsky explains. "When you bring them into captivity, they change into males more quickly." Some captive-born fish emerge as males even before reaching adulthood, devoting energy toward reproductive development and away from growth. Such problems make breeding and growing the fish in captivity a tricky proposition.

"Black sea bass is a wonderful fish to culture and to eat," says George Nardi, vice president and director of GreatBay Aquaculture, a commercial fish farm in Newington, NH. But the sex change problem must be tackled if fish farmers are to bring a high-quality fish to market. "We invest in our brood stocks, the parents of the young fish, much as a thoroughbred horse farm invests in mares and stallions," he says. "It doesn't do us much good if we always have to go out and get new females."

With funding from NH Sea Grant, Berlinsky has teamed with Nardi and GreatBay Aquaculture to study what triggers sex reversal in black sea bass and how to prevent it. Berlinsky and his colleagues have discovered that fish are more likely to become males if raised at constant temperatures. But temperature is hardly the only factor involved. Sex ratios a
'"/>

Contact: Kirsten Weir
kirsten.weir@unh.edu
603-749-1565
University of New Hampshire
11-Apr-2006


Page: 1 2

Related biology news :

1. Uncovering the secrets of the deep
2. Uncovering the molecular basis of obesity
3. Uncovering DNAs sweet secret
4. Uncovering how bone marrow stromal cells can potentially regenerate brain tissue
5. Anthrax bacteriums deadly secrets probed
6. Natures secrets yield new adhesive material
7. Decoding mushrooms secrets could combat carbon, find better biofuels and safer soils
8. St. Jude study yields secrets of chromosome movement
9. UCR biologists unravel the genetic secrets of black widow spider silk
10. Nature surrenders flowery secrets to international team
11. Puzzling plankton yield secrets to role in evolution/global photosynthesis

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/3/2020)... , ... August 03, 2020 , ... ... announced a new partnership with medical equipment manufacturer, Spectrum Solutions, to provide COVID-19 ... to strengthen their laboratory supply chain for more than 10 years. Early in ...
(Date:7/31/2020)... ... July 30, 2020 , ... Justin Zamirowski ... with a near term focus on Type 2 diabetes and associated comorbidities. , ... multiple therapeutic areas and classes. As Chief Commercial Officer, Justin will lead ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
Breaking Biology News(10 mins):
(Date:8/15/2020)... ... 2020 , ... True Terpenes , the leading platform for terpene innovation, ... to research the medical potential of terpenes and the potential entourage effect , ... board is focused on expanding the recently launched line of effects-based terpenes - ...
(Date:8/7/2020)... ... August 06, 2020 , ... ... announces it has closed on the purchase of greenfield for a new, expanded ... and includes over 21 acres in the initial acquisition, with an option to ...
(Date:7/31/2020)... ... 29, 2020 , ... Diversified Technologies, Inc. has introduced a ... to drive Klystrons, TWTs, IOTs, and magnetrons. , DTI Radar Transmitter Systems ... a push-pull configuration; yielding fast fall time for a capacitive load. These all ...
(Date:7/31/2020)... ... July 30, 2020 , ... ... software for the life sciences industry, today announced the release of its ... specifically for Medical Science Liaisons (MSLs) and other field medical professionals. ...
Breaking Biology Technology:
Cached News: