6 documents found, page 1 of 1
Safe applications of ozone in tropical marine RAS: determining impacts of eleva...
Weidlich, Sabine; Keuter, Sabine; Aires, Tania; Engelen, Aschwin; Kunzmann, AndreasOzone-aided treatment of seawater creates secondary oxidants, which can be toxic for aquaculture animals. We aimed to define safe limits of ozonation-derived total residual oxidants (TRO) for Stylophora pistillata and Xenia sp. by conducting a 96 h acute toxicity experiment. In a chronic exposure experiment we then determined the impacts of three sub-lethal levels of TRO on animal health over four weeks by moni...
Metabolic responses and resilience to environmental challenges in the sedentary...
Molina, Juan; Kunzmann, Andreas; Reis, João Pena; Guerreiro, Pedro MIn the context of climate change, warming of the seas and expansion of hypoxic zones are challenges that most species of fish are, or will be subjected to. Understanding how different species cope with these changes in their environment at the individual level can shed light on how populations and ecosystems will be affected. We provide first-time estimates on the metabolic rates, thermal, and oxygen-related li...
Global warming overrides physiological anti-predatory mechanisms in intertidal ...
Paul, Nina; Novais, Sara C.; Silva, Cátia S. E.; Mendes, Susana; Kunzmann, Andreas; Lemos, Marco F.L.In nature, a multitude of factors influences the fitness of an organismat a given time,whichmakes single stressor assessments far from ecologically relevant scenarios. This study focused on the effects of water temperature and predation stress on the metabolismand bodymass gain of a common intertidal rock pool fish, Gobius paganellus, addressing the following hypotheses: (1) the energy metabolism of G. paganell...
Acclimation capability inferred by metabolic performance in two sea cucumber sp...
Kühnhold, Holger; Novais, Sara C.; Alves, Luís M. F.; Kamyab, Elham; Lemos, Marco F. L.; Slater, Matthew J.; Kunzmann, AndreasThe notion that thermal specialists from tropical regions live closer to their temperature limits than temperate eurytherms, seems too generalized. Species specific differences in physiological and biochemical stress reactions are linked to key components of organism fitness, like metabolic capacity, which indicates that acclimation potential across latitudes might be highly diverse rather than simplistic. In t...
Chemical predator signals induce metabolic suppression in rock goby (Gobius pag...
Paul, Nina; Novais, Sara C.; Lemos, Marco F. L.; Kunzmann, AndreasIn 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...
Thermal stress effects on energy resource allocation and oxygen consumption rat...
Kühnhold, Holger; Kamyab, Elham; Novais, Sara; Indriana, Lisa; Kunzmann, Andreas; Slater, Matthew; Lemos, MarcoWater temperature is a key factor in aquaculture production of the commercially valuable sea cucumber Holothuria scabra. Knowledge is scarce about actual energetic costs that can be associated with internal acclimatization processes as a response to thermal extremes. In the present study changes in cellular energy allocation, oxygen consumption rate and energy related enzymes' activity (IDH and LDH) were measur...