FFTC Agricultural Policy Platform (FFTC-AP)

Taiwanese aquaculture researchers have raised the survival rate of lobster hatchlings from 40 percent to 70 percent, the Council of Agriculture’s Taitung District Agricultural Research and Extension Station said.

The station unveiled the breakthrough at a trade convention in November last year.

Lobster spawns molt several times in the six months following hatching to reach the postlarvae stage, said Cheng Ming-chung (鄭明忠), an assistant researcher with the Fisheries Research Institute’s Eastern Marine Biology Research Center.

Postlarvae are highly sensitive to water quality and fluctuations in environmental factors, and regularly engage in cannibalism, which makes keeping them alive a technical challenge for lobster farms, said Cheng, who led the project to improve lobster farming techniques.

Taiwanese lobster farms typically import 2cm-long postlarvae harvested from the sea and raise them into 4cm-long juveniles, he said.

The research team solved the issue of cannibalism by introducing shrimp larvae into the pool for the postlarvae to hunt, while large clumps of kelp provided hiding places, he said, adding that new technologies were used to improve the regulation of water and feed quality.

The techniques could help farmers raise more lobsters from the same larvae stock, and improve the flavor of the tomalley and the firmness of the meat, Cheng said.

The researchers used the species Panulirus homarus and Panulirus ornatus in the study, with the former being the more readily available and economic option for Taiwanese lobster farms, he said.

Using the new methods, the Panulirus homarus could grow from 2cm-long prolarvae to 4cm-5cm juveniles in two months, Cheng said, adding that the juveniles could then be transferred to downstream farms specializing in growing adults.

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