Docstoc

Slide 1 - Home Page

Document Sample
Slide 1 - Home Page Powered By Docstoc
					                                           Objectives

                • Examine feasibility of complete elimination of fish
                • meal in shrimp aquafeeds

                • Evaluate a novel, alternative protein source that is
                  organically certifiable

                • Investigate impacts on production, size
                  variation,and survival




Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                               Methods

                                                          • Trials were conducted at the
                                                            OAI’s facilities in Imperial,
                                                            Texas

                                                          • Four, 1.8 hectare ponds
                                                            stocked with PL12-16 L.
                                                            vannamei at a rate of
                                                            180,000 PL/pond

                                                          • All ponds inoculated with
                                                            endemic rotifer and copepod
                                                            populations collected from
                                                            the Pecos River, Texas.


Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                               Methods

                    • Three ponds were randomly assigned to the
                      diet containing NuPro® and stocked on June
                      13, 2005. The remaining pond (control)
                      stocked on June 20, 2005.

                    • No feed to any pond for first 30 days

                    • Dairy compost applied (51 kg ha-1) every two
                      weeks throughout trial.



Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                               Methods

                                                             • Feed was applied at 18 kg
                                                               d-1 in two equal feedings
                                                               until October 1, then 14 kg
                                                               in one feeding.

                                                             • Temperature recordings
                                                               collected daily, cast net
                                                               samples weekly.




Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                                  Methods

                                                                 •Following harvest, total
                                                                 production per pond,
                                                                 increase from initial
                                                                 weight, feed conversion
                                                                 ratio values, specific
                                                                 growth rates and survival
                                                                 were calculated.




Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                                     Results
                 Treatment                       Harvest         FCR1   Cumulative
                                                  (kg)                     SGR2




                 Control                           2654          0.51      1.67


                 NuPro® 1                          2558          0.53      1.64


                 NuPro® 2                          2508          0.54      1.70


                 NuPro® 3                          2792          0.49      1.89




Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                                 Results
              Percent increase in weight over initial values and survival

                         350


                         300


                         250


                         200


                         150


                         100


                          50


                               0

                                   NuPro 1           NuPro 2     NuPro 3   control




Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                                 Results
             Specific growth rates of Pacific white shrimp fed an experimental NuPro®-
             based and control (fishmeal-based) diet for 12 weeks.


                        4.5
                                  compost alone                  compost + feed
                              4

                        3.5

                              3

                        2.5
                                                                                       NuPro®
                              2
                                                                                       control
                        1.5

                              1

                        0.5

                              0

                       -0.5       0      2        4        6        8    10       12

                                                                              weeks




Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                                   Results
                        Average morning (blue) and evening (red) water temperatures
                        of experimental and control ponds throughout the trial period



                         31
                         29
                         27
                         25
                         23
                         21
                         19
                         17




                                                                                 10

                                                                                      11

                                                                                           12
                              1

                                    2

                                           3

                                                 4

                                                        5

                                                                 6

                                                                     7

                                                                         8

                                                                             9


Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                        Conclusions
               1.       Non-traditional shrimp cultivation practices can be
                        effectively and economically utilized to produce
                        high value marine shrimp.

               2.      PLs were not fed for 1 month; 80% survival
                       Indisputably points to the importance of the
                         microbial food web and its utilization by growing
                         shrimp.
                       Traditional shrimp culture methods averaged
                         49.8% survival for all Texas shrimp growers in
                         2005.

Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                        Conclusions
            •        FCRs were 0.5—that is 1 lb of shrimp produced with
                     0.5 lbs of feed

            •        NuPro®-based feeds produced animals with
                     significantly lower within-pond variation--higher farm
                     gate price for the product.




Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006
                                Thank you for your attention!




                                  Organic Aquaculture Institute Inc.
                                           Imperial, Texas
Aquaculture America 2006, Las Vegas, Nevada, Feb. 13-16th 2006

				
DOCUMENT INFO
Shared By:
Categories:
Stats:
views:6
posted:4/25/2011
language:English
pages:12