Aquaculture America 2020

February 9 - 12, 2020

Honolulu, Hawaii

EFFECTS OF COMMERCIALLY AVAILABLE INCREASED PROTEIN AND LIPID FEED ON THE REPRODUCTIVE PERFORMANCE OF FEMALE GOLDFISH Carassius auratus

 
Jacob H. Jones*, Sujan Bhattarai, Hayden E. Fischer, and  Dayan A. Perera
Dept. Aquaculture & Fisheries
The University of Arkansas at Pine Bluff
1200 N University Drive
Pine Bluff, AR 71601
jonesj7733@uapb.edu

Goldfish (Carassius auratus) are one of the most common and popular ornamental fish used in the aquarium trade. They are also used as bait and forage in the sport-fishing industry. The majority of goldfish production in the U.S. occurs in Lonoke county, Arkansas. Commercial spawning of goldfish is done in concrete raceway systems, lined with spawning mats where females scatter their adhesive eggs, which are fertilized by males. Traditionally, producers have not used specialized brood diets for goldfish, instead, using a standard 28%-32% catfish diet throughout the year. For commercial production, goldfish brooders are spawned three to four times per summer, with three to four-week intervals between spawning sessions. In this study the effect of two commercially available high protein and lipid diets (40% protein, 10% lipid), (45% protein, 16% lipid) were evaluated as potential brood diets. In an indoor tank study, brooders were fed a control diet followed by the potential brood diets for one, two, and three weeks pre-spawn. The control group was fed only the control diet, which consisted of 32% protein and 6% lipids for four weeks. After four weeks, the fish were induced with Ovaprim® and strip-spawned. Relative fecundity was calculated for each treatment group and the control. Initial results from the study indicated that goldfish fed specialized brood diets that included high protein and lipid content appeared to exhibit better performance and higher relative fecundity than those fed the control diet. Median relative fecundities of 27,851 eggs/kg for the high protein and lipid feed and 35,507 eggs/kg for the medium protein and lipid feed were recorded for the one-week trial and two-week trials, respectively.