Long‐term mild hypoxia does not reduce thermal tolerance or performance of the freshwater prawn Macrobrachium tenellum

2021 ◽  
Author(s):  
Nelly Tremblay ◽  
Marcelo García‐Guerrero ◽  
Fernando Díaz ◽  
Claudia Caamal‐Monsreal ◽  
Gabriela Rodríguez‐Fuentes ◽  
...  
Keyword(s):  
Thermal Tolerance ◽  
Freshwater Prawn ◽  
Mild Hypoxia

Effects of intermittent starvation on the survival, growth, and nutritional status of the freshwater prawn Macrobrachium borellii Nobili, 1896 (Decapoda: Caridea: Palaemonidae)

2020 ◽  
Vol 40 (5) ◽  
pp. 489-497
Author(s):  
Liane Stumpf ◽  
Santiago Timpanaro ◽  
Ariadna Battista ◽  
Laura López Greco
Keyword(s):  
Nutritional Status ◽  
Compensatory Growth ◽  
Recovery Period ◽  
Freshwater Prawn ◽  
Energy Reserves ◽  
Recovery Cycle ◽  
Food Scarcity ◽  
Continuous Feeding ◽  
Floodplain Rivers

Abstract We examined the effect of the double restriction-recovery cycle on survival, growth, and nutritional status of the freshwater prawn Macrobrachium borellii (Nobili, 1896), native to floodplain rivers of Argentina. The restriction period consisted of intermittent starvation (alternating four-day feeding with no feeding for four days) and a recovery period of continuous feeding following the restriction period. Survival was high over a 20-week trial with cycles of food scarcity. Prawns showed a slight impact on their growth throughout the entire first cycle of restriction-recovery; however, compensatory growth was not triggered. The reduction of growth was markedly more drastic after the second restriction period, but compensatory growth was not exhibited when the second recovery period was reestablished. Any possible impact of the double cycle of intermittent starvation on energy reserves and structure of the hepatopancreas was compensated by a posterior cycle of continuous feeding. The results demonstrated that M. borelli can successfully support long-term food scarcity throughout the juvenile and adult phases, at least intermittently and followed by a recovery period. The high nutritional flexibility is an adaptation to fluctuations in food availability and an advantage for successful ornamental aquaculture.

scholarly journals Scaling of thermal tolerance with body mass and genome size in ectotherms: a comparison between water- and air-breathers

2019 ◽  
Vol 374 (1778) ◽  
pp. 20190035 ◽  
Author(s):  
Félix P. Leiva ◽  
Piero Calosi ◽  
Wilco C. E. P. Verberk
Keyword(s):  
Genome Size ◽  
Body Mass ◽  
Thermal Tolerance ◽  
Global Climate ◽  
Oxygen Limitation ◽  
Thermal Limits ◽  
Physiological Diversity ◽  
Interspecific Differences ◽  
Extinction Events

Global warming appears to favour smaller-bodied organisms, but whether larger species are also more vulnerable to thermal extremes, as suggested for past mass-extinction events, is still an open question. Here, we tested whether interspecific differences in thermal tolerance (heat and cold) of ectotherm organisms are linked to differences in their body mass and genome size (as a proxy for cell size). Since the vulnerability of larger, aquatic taxa to warming has been attributed to the oxygen limitation hypothesis, we also assessed how body mass and genome size modulate thermal tolerance in species with contrasting breathing modes, habitats and life stages. A database with the upper (CTmax) and lower (CTmin) critical thermal limits and their methodological aspects was assembled comprising more than 500 species of ectotherms. Our results demonstrate that thermal tolerance in ectotherms is dependent on body mass and genome size and these relationships became especially evident in prolonged experimental trials where energy efficiency gains importance. During long-term trials, CTmax was impaired in larger-bodied water-breathers, consistent with a role for oxygen limitation. Variation in CTmin was mostly explained by the combined effects of body mass and genome size and it was enhanced in larger-celled, air-breathing species during long-term trials, consistent with a role for depolarization of cell membranes. Our results also highlight the importance of accounting for phylogeny and exposure duration. Especially when considering long-term trials, the observed effects on thermal limits are more in line with the warming-induced reduction in body mass observed during long-term rearing experiments. This article is part of the theme issue ‘Physiological diversity, biodiversity patterns and global climate change: testing key hypotheses involving temperature and oxygen’.

scholarly journals Limited thermal acclimation capacity in cave beetles

2018 ◽  
Vol 1 ◽  
Author(s):  
Susana Pallarés ◽  
Ignacio Ribera ◽  
Aitor Montes ◽  
Andrés Millán ◽  
Valeria Rizzo ◽  
...  
Keyword(s):  
Thermal Tolerance ◽  
Video Recording ◽  
Thermal Acclimation ◽  
List Type ◽  
Thermal Limit ◽  
Control Temperature ◽  
Rate Of Increase ◽  
Subterranean Species ◽  
Upper Thermal Limit

Thermal tolerance is a key vulnerability factor for species that cannot cope with changing conditions by behavioural adjustments or dispersal, such as subterranean species. Previous studies of thermal tolerance in cave beetles suggest that these species may have lost some of the thermoregulatory mechanisms common in temperate insects, and appear to have a very limited thermal acclimation ability. However, it might be expected that both thermal tolerance and acclimation ability should be related with the degree of specialization to deep subterranean environments, being more limited in highly specialized species. To test this hypothesis, we use an experimental approach to determine the acclimation capacity of cave beetles within the tribe Leptodirini (family Leiodidae) with different degrees of specialization to the deep subterranean environment. For this, we acclimate groups of individuals at a temperature close to their upper thermal limit (20ºC) or a control temperature (approximately that of the cave in which they were found) for 2 or 10 days (short- vs. long-term acclimation). a temperature close to their upper thermal limit (20ºC) or a control temperature (approximately that of the cave in which they were found) for 2 or 10 days (short- vs. long-term acclimation). Upper thermal limits (heat coma temperature, HC) are then measured for each individual using a ramping protocol (rate of increase of 1ºC/min) combined with infrared thermography and video recording. Preliminary results in a deep subterranean species (Speonomidius crotchi, with an intermediate degree of specialization) showed no significant effect of acclimation temperature in HC at any of the exposure times. Such reduced thermal plasticity could be also expected for other highly specialized subterranean species. The potential implications of these findings for subterranean biodiversity in a climate change context are discussed.

Long-term cryopreservation of spermatophore of the giant freshwater prawn, Macrobrachium rosenbergii (de Man)

2004 ◽  
Vol 35 (15) ◽  
pp. 1415-1420 ◽  
Author(s):  
Khattiya Akarasanon ◽  
Praneet Damrongphol ◽  
Wandee Poolsanguan
Keyword(s):  
Macrobrachium Rosenbergii ◽  
Freshwater Prawn ◽  
Giant Freshwater Prawn ◽  
De Man

scholarly journals Scaling of thermal tolerance with body mass and genome size in ectotherms: A comparison between water-and air-breathers

2019 ◽  
Author(s):  
Félix P. Leiva ◽  
Piero Calosi ◽  
Wilco C.E.P. Verberk
Keyword(s):  
Genome Size ◽  
Body Mass ◽  
Thermal Tolerance ◽  
Oxygen Limitation ◽  
Thermal Limits ◽  
Interspecific Differences ◽  
Extinction Events ◽  
Experimental Trials ◽  
Methodological Aspects

AbstractGlobal warming appears to favour smaller-bodied organisms, but whether larger species are also more vulnerable to thermal extremes, as suggested for past mass-extinction events, is still an open question. Here, we tested whether interspecific differences in thermal tolerance (heat and cold) of ectotherm organisms are linked to differences in their body mass and genome size (as a proxy for cell size). Since the vulnerability of larger, aquatic taxa to warming has been attributed to the oxygen limitation hypothesis, we also assessed how body mass and genome size modulate thermal tolerance in species with contrasting breathing modes, habitats and life-stages. A database with the upper (CTmax) and lower (CTmin) critical thermal limits and their methodological aspects was assembled comprising more than 500 species of ectotherms. Our results demonstrate that thermal tolerance in ectotherms is dependent on body mass and genome size and these relationships became especially evident in prolonged experimental trials where energy efficiency gains importance. During long-term trials, CTmax was impaired in larger-bodied water-breathers, consistent with a role for oxygen limitation. Variation in CTmin was mostly explained by the combined effects of body mass and genome size and it was enhanced in larger-celled, air-breathing species during long-term trials, consistent with a role for depolarization of cell membranes. Our results highlight the importance of accounting for phylogeny and exposure duration. Especially when considering long-term trials, the observed effects on thermal limits are more in line with the warming-induced reduction in body mass observed during long-term rearing experiments.

scholarly journals Characterization of a Novel Food Grade Emulsion Stabilized by the By- Product Proteins Extracted From the Head of Giant Freshwater Prawn (Macrobrachium rosenbergii)

2021 ◽  
Vol 8 ◽  
Author(s):  
Yi Wu ◽  
Yufeng Li ◽  
Ronghan Wang ◽  
Yong Zhao ◽  
Haiquan Liu ◽  
...  
Keyword(s):  
Macrobrachium Rosenbergii ◽  
Added Value ◽  
Freshwater Prawn ◽  
Food Grade ◽  
Giant Freshwater Prawn ◽  
Long Term Stability ◽  
Salt Addition ◽  
Oil Water ◽  
The Stability

The aim of this work was to develop a food-grade emulsion that stabilized by the by-product proteins in the head of giant freshwater prawn. The physicochemical properties of protein particles were characterized, and the stability of proteins-stabilized emulsions under different environmental stresses was evaluated. Results showed that the proteins were relatively hydrophilic and preferentially resided in the aqueous phase to form oil/water emulsions. On this basis, the proteins exhibited superior ability to stabilize the emulsions, and remarkably, the emulsions stabilized by 2% proteins and 3:7 oil/water ratio efficiently resisted the freeze-thaw treatment and the change of pH (3–9), salt addition (NaCl, 50–400 mM), and storage temperatures (4–60°C). Furthermore, the emulsions showed a matched long-term stability with the existing biopolymers-stabilized emulsions. Consequently, this is the first finding of the by-product proteins in the head of giant freshwater prawn as an excellent emulsifier to stabilize emulsions, which help to improve the stability of food-grade emulsions and the added value of aquatic products.

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