February 15-18, 2009 Washington State Convention Center Seattle ...

SHRIMP RESEARCH ACTIVITIES AT OCEANIC INSTITUTE
Shaun M. Moss * , Dustin R. Moss, Steve M. Arce, Clete A. Otoshi and Carrie M. Holl
Oceanic Institute
41-202 Kalanianaole Highway
Waimanalo, HI 96795 USA
smoss@oceanicinstitute.org
Through the U.S. Marine Shrimp Farming Program, Oceanic Institute (OI) has established a selective breeding program to
improve the performance of specific pathogen free (SPF), Pacific white shrimp, Litopenaeus vannamei. During the past year,
50 full-sib families from the TSV-Resistant line were produced. Representative shrimp from these families were exposed to a
single isolate of Taura syndrome virus (TSV; the Americas group) at the University of Arizona in a per os challenge test. After
14 days, mean family survival (± SD) was 88.7 ± 7.12% and family survival ranged from 70-100%. Twelve families exhibited
mean family survival > 95%, and 21 families exhibited mean family survival > 90%.
In addition to the TSV-challenge test, juvenile shrimp from all 50 families were evaluated for growth and survival in a 75-m 2
raceway located in OI’s Nucleus Breeding Center. For the trial, 8,604 tagged shrimp and 13,500 untagged shrimp were stocked
into the raceway resulting in an initial stocking density of 295 shrimp/m 2 . After 95 days, 7,283 tagged shrimp and 10,945 untagged
shrimp were harvested resulting in a final survival of 82.5%. Final harvest weight of the tagged shrimp was 23.38 g,
whereas final harvest weight of the untagged shrimp was 22.89 g. Mean weight of tagged, male shrimp was 22.54 g, whereas
mean weight of tagged, female shrimp was 24.25 g. These data provide further evidence of sexual growth dimorphism for this
species. Raceway production was 5.61 kg of shrimp/m 2 at harvest, Food Conversion Ratio (FCR) was 1.65, and water usage
was 1,206 L of water/kg of shrimp produced.
With regard to family-specific data, 11 families exhibited a mean family growth rate > 1.70 g/wk, and two families exhibited
a mean family growth rate > 1.80 g/wk. One family exhibited a growth rate of 1.86 g/wk. Mean family growth rate for all 50
families was 1.64 g/wk (SD ± 0.09). At the end of the growout trial, 28 families exhibited a mean family survival > 80%, and
two families exhibited a mean family survival > 90%. Mean family survival for all 50 families was 80.12% (SD + 08.74).
Correlation coefficients were estimated for TSV survival and Average Daily Growth, TSV survival and Growth Rate, TSV
survival and Production, and TSV survival and Inbreeding. Correlation coefficients ranged from 0.03 – 0.13 and none were
significant. These results suggest that there is no relationship between TSV survival and growth, as well as between TSV
survival and inbreeding, when inbreeding levels are low (F < 0.11).
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