Response of juvenile Lophiosilurus alexandri to osmotic and thermic shock

Mattioli, Cristiano Campos; Takata, Rodrigo; Leme, Fabiola de Oliveira Paes; Costa, Deliane Cristina; Luz, Ronald Kennedy

doi:10.1007/s10695-019-00696-5

Cited by 12 publications

(10 citation statements)

References 52 publications

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“…At this temperature, the current density in the Na + channels of zebrafish myocytes and the rate of development of the action potential were similar to those in human heart myocytes at 37 o C [55]. The optimum temperature for other fish species living at a wide range of temperatures, in particular for Lophiosilurus alexandri [56] or Nile tilapia [57], is also 28 o C. Furthermore, the temperature of 25±2 o C is a thermopreferendum for frogs (Rana esculenta) [58]. The optimal metabolic rate and the maximal rate of larva formation in nematode Caenorhabditis elegans [59], the maximal regeneration rate in planaria Girardia tigrina [60], the maximal mobility in planaria Schmidtea mediterranea [61] are in the same temperature range from 26 o C to 28 o C. It was shown in our experiments (Fig.…”

Section: Thermopreferendum Temperaturementioning

confidence: 53%

Limits of Temperature Adaptation and Thermopreferendum

Aslanidi

Kharakoz

2021

Preprint

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Background Managing the limits of temperature adaptation is relevant both in medicine and in biotechnology. There are numerous scattered publications on the identification of the temperature limits of existence for various organisms and using different methods. It was shown earlier that each cycle of synaptic exocytosis includes reversible phase transitions of lipids of the presynaptic membrane due to the entry and subsequent removal of calcium ions from the synaptic terminal. Violation of cyclic changes in membrane fluidity caused by a sharp increase or decrease in ambient temperatures will lead to the termination of synaptic transmission, which can be recorded by the loss of righting reflex.Results The viability polygon for Danio rerio was determined by the minimum temperature of cold shock (about 6 o C), maximum temperature of heat shock (about 43 o C), and thermopreferendum temperature (about 27 o C). The ratio of the temperature range of cold shock to the temperature range of heat shock was about 1.3. Conclusions The experimental values of the temperatures of cold shock and heat shock and the temperature of the thermal preferendum correspond to the temperatures of phase transitions of the lipid-protein composition of the synaptic membrane between the liquid and solid states. The viability range for zebrafish coincides with the temperature range, over which enzymes function effectively and also coincides with the viability polygons for the vast majority of organisms. The boundaries of the viability polygon are characteristic biological constants. The viability polygon of a particular organism is determined not only by the genome, but also by the physicochemical properties of lipids that make up the membrane structures of synaptic endings. The limits of temperature adaptation of any biological species are determined by the temperature range of the functioning of its nervous system.

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Section: Thermopreferendum Temperaturementioning

confidence: 53%

Limits of Temperature Adaptation and Thermopreferendum

Aslanidi

Kharakoz

2021

Preprint

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“…Tambaqui juvenile, Colossoma macropomum , showed higher resistance to salinity than L. alexandri juvenile, and their survival was unaffected at 10 ppt, only suffering decreased survival at the higher salinity of 15 ppt (Fiúza et al, 2015). However, there is a difference between acute and chronic or longer exposure of stenohaline fish species to the saline environment, which should be considered in tissue change and physiological adaptation for aquaculture (Fiúza et al, 2015; Mattioli et al, 2017, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…In fact, differences among species may be related their capacities for adapting to changing environmental salinity and the strategies to keep the homeostasis. That is stenohaline versus euryhaline fish species (Altinok & Grizzle, 2001, 2003; Mattioli et al, 2019). The ability of fish to osmoregulate in the face of environmental salinity challenges is essential for species that migrate between freshwater and seawater during their life cycle.…”

Section: Introductionmentioning

confidence: 99%

“…Salt is often used in management of larviculture of freshwater fish species to improve larval growth and survival (Beux, & Zaniboni-Filho, 2007;Luz, & Santos, 2010;Santos, & Luz, 2009). Exposure of fish to different environmental salinity in later developmental stages, juveniles and adults, induces changes in osmoregulation and metabolism, which can affect fish survival and growth (Boeuf, & Payan, 2001;Mattioli et al, 2017Mattioli et al, , 2019. In general, fish are able to maintain quite constant ionic composition and osmolality of their internal fluids when exposed to changes in environmental salinity, at least until the limit that causes stress disturbance is reached, which varies among species.…”

Section: Introductionmentioning

confidence: 99%

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The effects of salinity on growth, gill tissue and muscle cellularity in Lophiosilurus alexandri juvenile, a Neotropical freshwater catfish

Takata

Mattioli

Bazzoli

et al. 2021

Aquaculture Research

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The present study investigated the effects of salinity on growth, mortality, gill morphology and muscle cellularity in Lophiosilurus alexandri. Fish were submitted to the following salinity for 28 days: 0 (S0), 2.5 (S2.5), 5.0 (S5), 7.5 (S7.7) and 10 (S10) ppt. Growth and protein efficiency ratio (PER) decreased with the increase of salinity. All fish from S10 died between the 16th and 21st day of the experiment. Mortality in S7.5 was 78% at the end of 28 days of salinity exposure. Increased salinity was accompanied by increased vascular congestion, hyperplasia of gill filament epithelium, lamellar fusion and loss of structural integrity of pillar cells. Fish at S2.5 and S5 had higher mucosal cell hyperplasia. Chloride cell quantity was higher in fish in the S2.5 to S7.5. In general, L. alexandri juvenile exposed to treatments of freshwater and S2.5 had similar patterns of muscle cellularity, with high averages for the most of the variables of muscle cellularity evaluated. The large fibre size classes tended to decrease with increasing salinity. L. alexandri juveniles may be cultivated up to 2.5 g of salt/L, and superior concentrations change growth, induce damage to gills and modify muscle cellularity.

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Section: Discussionmentioning

confidence: 99%

Limits of temperature adaptation and thermopreferendum

Aslanidi

Kharakoz

2021

Cell Biosci

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Background Managing the limits of temperature adaptation is relevant both in medicine and in biotechnology. There are numerous scattered publications on the identification of the temperature limits of existence for various organisms and using different methods. Dmitry Petrovich Kharakoz gave a general explanation for many of these experimental results. The hypothesis implied that each cycle of synaptic exocytosis includes reversible phase transitions of lipids of the presynaptic membrane due to the entry and subsequent removal of calcium ions from the synaptic terminal. The correspondence of the times of phase transitions has previously been experimentally shown on isolated lipids in vitro. In order to test the hypothesis of D.P. Kharakoz in vivo, we investigated the influence of the temperature of long-term acclimatization on the temperature of heat and cold shock, as well as on the kinetics of temperature adaptation in zebrafish. Testing the hypothesis included a comparison of our experimental results with the results of other authors obtained on various models from invertebrates to humans. Results The viability polygon for Danio rerio was determined by the minimum temperature of cold shock (about 6 °C), maximum temperature of heat shock (about 43 °C), and thermopreferendum temperature (about 27 °C). The ratio of the temperature range of cold shock to the temperature range of heat shock was about 1.3. These parameters obtained for Danio rerio describe with good accuracy those for the planarian Girardia tigrina, the ground squirrel Sermophilus undulatus, and for Homo sapiens. Conclusions The experimental values of the temperatures of cold shock and heat shock and the temperature of the thermal preferendum correspond to the temperatures of phase transitions of the lipid-protein composition of the synaptic membrane between the liquid and solid states. The viability range for zebrafish coincides with the temperature range, over which enzymes function effectively and also coincides with the viability polygons for the vast majority of organisms. The boundaries of the viability polygon are characteristic biological constants. The viability polygon of a particular organism is determined not only by the genome, but also by the physicochemical properties of lipids that make up the membrane structures of synaptic endings. The limits of temperature adaptation of any biological species are determined by the temperature range of the functioning of its nervous system.

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Response of juvenile Lophiosilurus alexandri to osmotic and thermic shock

Cited by 12 publications

References 52 publications

Limits of Temperature Adaptation and Thermopreferendum

Limits of Temperature Adaptation and Thermopreferendum

The effects of salinity on growth, gill tissue and muscle cellularity in Lophiosilurus alexandri juvenile, a Neotropical freshwater catfish

Limits of temperature adaptation and thermopreferendum

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