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Table 1 Summary of the effects of HDC inhibitor, HA, HA receptor antagonists and KCl on settlement without induction, arm retraction and caspase activity for competent larvae

From: Histamine is a modulator of metamorphic competence in Strongylocentrotus purpuratus(Echinodermata: Echinoidea)

Treatment

Settlement

Rel. Arm Length

Caspase Activity

HA

-

-

-

AMH

↑

-

↑

H1Ra

-

↓

↑

H2Ra

-

-

↑

H3Ra

↑

↓

-

KCL

↑

↓

-

  1. All effects indicated in this table were statistically significant (p < 0.05).
  2. all results significant for p < 0.05.