Aquaculture America 2023

February 23 - 26, 2023

New Orleans, Louisiana USA

COMPARISON OF TWO DIFFERENT PRODUCTION STRATEGIES AND TRAPPING METHODS FOR CRAWFISH PRODUCTION

Jesse P.B. James*, David Teichert-Coddington, Anita M. Kelly, Hisham A. Abdelrahman,

Luke A. Roy

 School of Fisheries, Aquaculture and Aquatic Sciences

 

Auburn University

Auburn, Alabama 36849

Jbj0023@auburn.edu

 



Pacific white shrimp (Litopenaeus vannamei) and red swamp crawfish (Procambarus clarkii) are currently being produced on small scales in west Alabama. Since 2014 shrimp survival and yields on Alabama farms have been consistently reduced due to several factors. In 2018 crawfish were stocked on one commercial shrimp farm to supplement farm income. Due to the style of ponds available used for shrimp farming, Deep-water crawfish production can be implemented without making any changes to the current infrastructure. In this study we compared economic assessments of traditional and deep-water crawfish production systems at two different farms in west Alabama and evaluated the efficiency of two different trapping methods that can be implemented in deep-water ponds. Traditional crawfish production systems consist of shallow ponds with an average depth of approximately 0.6m that are completely drained from July to October to allow the cultivation of a forage crop. These systems are typically harvested from February to June using small commercial crawfish traps (37-74 traps/ acre). Deep-water systems differ from traditional ponds in that the average depth can be as much as 0.91-1.21m and the ponds are not drained and planted. Instead, these ponds remain filled throughout the year and crawfish are fed some form of supplemental feed. To harvest these ponds, the traps either need to be much taller to accommodate the deeper water or traditional size traps can be placed around the pond shoreline. In this study we found that the traditional systems yielded much higher production and net income than deep-water systems. Production costs/pound were found to be higher for deep-water ponds. The most common commercial crawfish traps used in traditional pond systems in Alabama are pyramid style traps with three entry points around the base and an open top with an 20cm wire neck that is terminated by a plastic ring that prevents escapement and acts as a handle. The total height of these traps measured from the ground is 0.76m. In order to harvest the deep-water systems custom built traps with extended necks were used that were 1.35m in total height. To test the efficiency of trapping methods in deep-water systems tall traps were placed around the pond in water that was 0.91-1.02m deep, while an equal number of the traditional 0.76m traps were placed around the shoreline of the pond at water depths of 0.3-0.61m. A series of harvests were made recording the time required to harvest each type of trap and the catch for each were weighed separately. After multiple runs data indicated that harvest weight differences seemed to be pond dependent while harvest time differences were not significant. Farmer preference favored the traditional sized traps due to ease of handling. While the deep-water systems were profitable, they were far less productive than traditional ponds. In the future these ponds will be run as traditional systems by reducing the water level to 0.61m and planting forage crops during the summer.