Evaluation of ultra‐low gossypol cottonseed and regular glandless cottonseed meals as dietary protein and lipid sources for Litopenaeus vannamei reared under zero‐exchange conditions |
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| Authors: | CM Richardson AJ Siccardi SR Palle LM Campbell L Puckhaber RD Stipanovic TC Wedegaertner KS Rathore TM Samocha |
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| Affiliation: | 1. Texas A&M AgriLife Research Mariculture Laboratory at Flour Bluff, Corpus Christi, TX, USA;2. Institute for Plant Genomics & Biotechnology, Texas A&M University, College Station, TX, USA;3. USDA‐ARS Southern Plains Agricultural Research Center, College Station, TX, USA;4. Cotton Incorporated, Cary, NC, USA |
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| Abstract: | The current study evaluated transgenic cotton lines with normal levels of gossypol/terpenoids in the vegetative and floral tissues, but with ultra‐low gossypol in the seeds as a replacement for glandless cottonseed meal (GCSM) and fishmeal. A 64‐day growth trial evaluated the ability of cottonseed meals from a natural glandless cotton variety/mutant, two transgenic Ultra‐low Gossypol Cottonseed (ULGCS) lines, a non‐transgenic parental control and a commercial variety, to replace 355 g kg?1 fishmeal in a diet containing 350 g kg?1 crude protein. Juvenile Litopenaeus vannamei (1.48 ± 0.29 g) were stocked (40 shrimp m?3) with six replicates. No significant differences were found between all formulated diets in terms of final weight, survival and feed conversion ratio. The commercial cottonseed variety displayed a significantly lower feed efficiency ratio and protein efficiency ratio than one of the ULGCS diets. These results suggest that GCSM and/or transgenic ULGCS meals can be used to replace fishmeal in commercial shrimp diets. |
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| Keywords: | cottonseed fishmeal replacement gossypol
Litopenaeus vannamei
RNAi shrimp feed |
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