Thyroid Hormones in Hemolymph of Red King Crabs from the Barents Sea.

Only a few studies have reported the presence and levels of thyroid hormones in invertebrates. At the same time, the administration of these hormones has been shown to be a profitable method for inducing growth in crustaceans. Knowledge of thyroid hormone concentrations is required to involve this approach in crustacean aquaculture.

Sex Hormones in Hemolymph of Red King Crabs from the Barents Sea.

The presence of vertebrate-related steroid sex hormones has been reported in both freshwater and marine crustaceans. However, despite the commercial importance of king crabs, many aspects of their endocrinology are still unknown. For this reason, we examined hemolymph samples of the red king crab from the Barents Sea population for the presence of testosterone and 17β-estradiol using radioimmunoassay.