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Oxygen consumption (VO2) of intact (black bars) and eyestalkless (open bars) Neohelice granulata exposed for 45 min only to 6 mgO2·L−1 and injected with physiological saline only (CTR) luzindole (200 nmol·crab−1) plus physiological saline, physiological saline plus melatonin (200 pmol·crab−1), or luzindole (200 nmol·crab−1) plus melatonin (200 pmol·crab−1). Each point represents the mean ± SE (n = 3–4). No significant differences (p > 0.05) were observed.
