Pubblicazione scientifica

Chemical predator signals induce metabolic suppression in rock goby (Gobius paganellus)

FILONE TECNOLOGICO	TEMA
produzione e raccolta
trasformazione e commercializzazione

RIASSUNTO

In nature, a multitude of both abiotic and biotic stressors influence organisms with regard to their overall fitness. Stress responses that finally impair normal biological functions may ultimately result in consequences for whole populations. This study focused on the metabolic response of the intertidal rock pool fish Gobius paganellus towards simulated predation risk. Individuals were exposed to a mixture of skin extracts from conspecifics and chemical alarm cues from a top predator, Octopus vulgaris. Oxygen consumption rates of single fish were measured to establish standard (SMR) and routine metabolic rates (RMR) of G. paganellus, and to address the direct response towards simulated predation risk, compared to handling and light stress. The SMR of G. paganellus (0.0301 ± 0.0081 mg O2 h-1 g-1 WW) was significantly lower than the RMR (0.0409 ± 0.0078 mg O2 h-1 g-1 WW). In contrast to increased respiration due to handling and light stress, the exposure to chemical predation cues induced a significant reduction in oxygen consumption rates (0.0297 ± 0.0077 mg O2 h-1 g-1 WW). This metabolic suppression was interpreted as a result of the stereotypic freezing behaviour as antipredator response of gobiid fish. Results underline the importance of biotic interactions in environmental stress assessments and predation as a biotic factor that will provide more realistic scenarios when addressing stress impacts in tidal rock pool organisms.

DATA

Data di pubblicazione: 17/12/2018

AUTORI

PAUL NINA
NOVAIS SARA C
LEMOS MARCO F L
KUNZMANN ANDREAS

ENTE DI AFFERENZA

MARE–Marine and Environmental Sciences Centre ESTM Instituto Politécnico de Leiria Peniche Portugal
LEIBNIZ CTR TROPICAL MARINE RSCH ZMT BREMEN GERMANY
UPPSALA UNIV SWEDEN

RIVISTA

PLoS ONE, 13(12), e0209286

IMPACT FACTOR

2,870

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