Aspects of the physiology of terrestrial life in amphibious fishes. III. The Chinese mudskipper Periophthalmus cantonensis

1978 ◽  
Vol 72 (1) ◽  
pp. 57-75 ◽  
Author(s):  
MS Gordon ◽  
WW Ng ◽  
AY Yip
Keyword(s):  
Terrestrial Life ◽  
Amphibious Fishes

Aspects of the Physiology of Terrestrial Life in Amphibious Fishes

1969 ◽  
Vol 50 (1) ◽  
pp. 141-149 ◽  
Author(s):  
MALCOLM S. GORDON ◽  
INGE BOËTIUS ◽  
DAVID H. EVANS ◽  
ROSEMARY McCARTHY ◽  
LARRY C. OGLESBY
Keyword(s):  
Thermal Stresses ◽  
Severe Dehydration ◽  
Evaporative Water ◽  
Lethal Temperatures ◽  
Physiological Adaptations ◽  
Urea Production ◽  
Terrestrial Life ◽  
Production Increase ◽  
Amphibious Fishes ◽  
Environmental Temperatures

1. A study has been carried out of major aspects of the physiological adaptations for terrestrial life possessed by the amphibious mudskipper fish, Periophthalmus sobrinus, on the island of Nosy Bé, Madagascar. 2. These fish can survive for approximately 1½ days out of water, if not exposed to severe dehydration or thermal stresses. Evaporative water-loss rates while out of water are relatively low. Upper lethal temperatures are only a few degrees above normal midday environmental temperatures. 3. These fish lack the symptoms of the ‘diving syndrome’. Metabolic rates (oxygen consumption), heart rates, and blood lactic acid concentrations are not affected by shifts of fish between water and air. 4. Rates of ammonia and urea production increase in fish out of water. The ratio of urea/ammonia also increases. 5. The generality of the results, also their physiological significance, are discussed.

scholarly journals A Gastrointestinal Metagenomic Study On Mudskippers Supports Their Terrestrial Adaptation

2022 ◽  
Author(s):  
Bo Dong ◽  
Jing Liu ◽  
Bing Chen ◽  
Yuqi Huang ◽  
Peng Ai ◽  
...  
Keyword(s):  
Fish Species ◽  
Life Style ◽  
Potential Functions ◽  
Metagenomic Data ◽  
Literature Mining ◽  
Microbial Composition ◽  
Terrestrial Life ◽  
Metagenomic Study ◽  
Amphibious Fishes ◽  
Genome Level

Abstract -Purpose: The adaptability of blue-spotted mudskipper (Boleophthalmus Periophthalmodon; BP) and giant-fin mudskipper (Periophthalmus magnuspinnatus; PM), has been previously reported at the genome level to explain their amphibious life. However, the roles of GI microbiota in their adaptation to the terrestrial life are worth exploring. -Methods: In this study, we mainly utilized metagenomic data from these two representative mudskippers and typical aquicolous fish species to obtain microbial composition, diversity, abundance and potential functions of GI microbiota for comparisons between amphibious and aquicolous fishes. Meanwhile, we summarized the GI microbiota results of representative seawater fishes, freshwater fishes, amphibians, and terrestrial animals by literature mining for comparing those of the mudskippers. -Result: Interestingly the content for each dominant phylum was strikingly different among BP, PM and aquicolous fishes. We also observed that the profile of GI microbiota in mudskippers owned the typical bacterial families for the terrestrial animals, (freshwater and seawater) fishes, and amphibians at the same time, which is consistent with their life style of water-to-land and freshwater to seawater transition. More interestingly, certain bacteria strains like S24-7, previously thought to be specific in terrestrial animals, were also identified in both BP and PM. -Conclusion: The various composite and diversity of mudskipper GI microflora are therefore considered to conduce to their terrestrial adaptation in these amphibious fishes.

Aspects of the Physiology of Terrestrial Life in Amphibious Fishes

1970 ◽  
Vol 53 (3) ◽  
pp. 559-572 ◽  
Author(s):  
MALCOLM S. GORDON ◽  
SIEGMUND FISCHER ◽  
EDUARDO TARIFEÑO S.
Keyword(s):  
Thermal Stresses ◽  
Control Level ◽  
Severe Dehydration ◽  
Evaporative Water ◽  
Central Chile ◽  
Lethal Temperatures ◽  
Physiological Adaptations ◽  
Terrestrial Life ◽  
Amphibious Fishes ◽  
Systemic Accumulation

1. A study has been made of major aspects of the physiological adaptations for terrestrial life possessed by the amphibious clingfish, Sicyases sanguineus, on the coast of central Chile. 2. These fish can survive for more than 1½ days out of water, if not exposed to severe dehydration or thermal stresses. Rates of evaporative water loss while out of water are low. Upper lethal temperatures are also low, reflecting the uniformly cool water temperatures of their environment. In nature the fish rarely leave areas in which they are frequently washed over by waves. 3. These fish demonstrate an unusual combination of metabolic and cardiovascular adjustments to emersion. Metabolic rates (oxygen consumption) of small (1-5 g weight) fish are higher out of water than in water. Larger fish show a pattern of intermittent oxygen uptake when out of water. Heart rates respond to emersion (and associated cessation of breathing movements) in the pattern of the diving syndrome. Lactic acid concentrations in the blood gradually increase above control levels during the first few hours of emersion, then remain constant at about x 3 control level. There is no indication of peripheral vascular shutdown during emersion. 4. Emersion produces a marked shift towards ureotelism in waste nitrogen production. There appears to be no systemic accumulation of ammonia during emersion. 5. The generality of the results, and also their physiological significance, are discussed.

Homochirality as the Signature of Extra-Terrestrial Life

1997 ◽  
Vol 161 ◽  
pp. 505-510
Author(s):  
Alexandra J. MacDermott ◽  
Laurence D. Barron ◽  
Andrè Brack ◽  
Thomas Buhse ◽  
John R. Cronin ◽  
...  
Keyword(s):  
Amino Acids ◽  
Protein Synthesis ◽  
Optical Rotation ◽  
Physical Origin ◽  
Natural Choice ◽  
Rosetta Mission ◽  
Terrestrial Life ◽  
Subsurface Layers ◽  
Solar System Bodies ◽  
Origin Of Homochirality

AbstractThe most characteristic hallmark of life is its homochirality: all biomolecules are usually of one hand, e.g. on Earth life uses only L-amino acids for protein synthesis and not their D mirror images. We therefore suggest that a search for extra-terrestrial life can be approached as a Search for Extra- Terrestrial Homochirality (SETH). The natural choice for a SETH instrument is optical rotation, and we describe a novel miniaturized space polarimeter, called the SETH Cigar, which could be used to detect optical rotation as the homochiral signature of life on other planets. Moving parts are avoided by replacing the normal rotating polarizer by multiple fixed polarizers at different angles as in the eye of the bee. We believe that homochirality may be found in the subsurface layers on Mars as a relic of extinct life, and on other solar system bodies as a sign of advanced pre-biotic chemistry. We discuss the chiral GC-MS planned for the Roland lander of the Rosetta mission to a comet and conclude with theories of the physical origin of homochirality.

Ivan Ozhienko about the role of religion in Ukrainian national life

2001 ◽  
pp. 54-61
Author(s):  
K. Nedzelsky
Keyword(s):  
Ethnic Identity ◽  
Spiritual Life ◽  
Human Soul ◽  
National Unity ◽  
Terrestrial Life ◽  
Dedicated Service ◽  
National Life ◽  
Role Of Religion ◽  
Spiritual Unity

Ivan Ogienko (1882-1972), also known as Metropolitan Hilarion, devoted much attention to the role and place of religion in the national life of Ukrainians and their ethnic identity in their scholarly and theological works. Without exaggeration it can be argued that the problem of national unity of the Ukrainian people is one of the key principles of all historiosophical considerations of the famous scholar and theologian. If the purpose of the spiritual life of a Ukrainian, according to his views, is to serve God, then the purpose of state or terrestrial life is the dedicated service to his people. The purpose of heaven and the purpose of the earthly paths, intersecting in the life of a certain group of people through the lives of its individual representatives, give rise to a unique alliance of spiritual unity, the name of which is "people" or "nation." Religion (faith) in the process of transforming the anarchist crowd into a spiritually integrated and orderly national integrity serves as the transformer of the imperfect nature of the human soul into perfect.

Novel Antibiotics from Marine Sources

2011 ◽  
Vol 4 (3) ◽  
pp. 1446-1461 ◽  
Author(s):  
E.A. Martis ◽  
G M Doshi ◽  
G V Aggarwal ◽  
P P Shanbhag
Keyword(s):  
Pharmaceutical Industry ◽  
Resistant Bacteria ◽  
Drug Resistant ◽  
Drug Resistant Bacteria ◽  
Terrestrial Life ◽  
New Antibiotics ◽  
Antibiotic Compounds ◽  
New Generation ◽  
Novel Antibiotics ◽  
Untapped Resource

With the emergence of newer diseases, resistant forms of infectious diseases and multi-drug resistant bacteria, it has become essential to develop novel and more effective antibiotics. Current antibiotics are obtained from terrestrial life or made synthetically from intermediates. The ocean represents virtually untapped resource from which novel antibiotic compounds can be discovered. It is the marine world that will provide the pharmaceutical industry with the next generation of antibiotics. Marine antibiotics are antibiotics obtained from marine organisms. Scientists have reported the discovery of various antibiotics from marine bacteria (aplasmomycin, himalomycins, and pelagiomycins), sponges (Ara C, variabillin, strobilin, ircinin-1, aeroplysin, 3,5-dibromo-4-hydroxyphenylacetamide), coelenterates (asperidol and eunicin), mollusks (laurinterol and pachydictyol), tunicates (geranylhydroquinone and cystadytins), algae (cycloeudesmol, aeroplysinin-1(+), prepacifenol and tetrabromoheptanone), worms (tholepin and 3,5-dibromo-4-hydroxybezaldehyde), and actinomycetes (marinomycins C and D). This indicates that the marine environment, representing approximately half of the global diversity, is an enormous resource for new antibiotics and this source needs to be explored for the discovery of new generation antibiotics. The present article provides an overview of various antibiotics obtained from marine sources.

scholarly journals Biosignatures of ancient microbial life are present across the igneous crust of the Fennoscandian shield

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Henrik Drake ◽  
Nick M. W. Roberts ◽  
Manuel Reinhardt ◽  
Martin Whitehouse ◽  
Magnus Ivarsson ◽  
...  
Keyword(s):  
Fennoscandian Shield ◽  
Stable Carbon ◽  
Deep Biosphere ◽  
Isotopic Signatures ◽  
Microbial Life ◽  
Carbon Isotopic ◽  
Terrestrial Life ◽  
Vein Mineral ◽  
Methyl Branched Fatty Acids

AbstractEarth’s crust contains a substantial proportion of global biomass, hosting microbial life up to several kilometers depth. Yet, knowledge of the evolution and extent of life in this environment remains elusive and patchy. Here we present isotopic, molecular and morphological signatures for deep ancient life in vein mineral specimens from mines distributed across the Precambrian Fennoscandian shield. Stable carbon isotopic signatures of calcite indicate microbial methanogenesis. In addition, sulfur isotope variability in pyrite, supported by stable carbon isotopic signatures of methyl-branched fatty acids, suggest subsequent bacterial sulfate reduction. Carbonate geochronology constrains the timing of these processes to the Cenozoic. We suggest that signatures of an ancient deep biosphere and long-term microbial activity are present throughout this shield. We suggest that microbes may have been active in the continental igneous crust over geological timescales, and that subsurface investigations may be valuable in the search for extra-terrestrial life.

Terrestrial life of the amphibious fish Mnierpes macrocephalus

1973 ◽  
Vol 23 (1) ◽  
pp. 83-91 ◽  
Author(s):  
J. B. Graham
Keyword(s):  
Terrestrial Life

Environmental Iodine Deficiency: A Challenge to the Evolution of Terrestrial Life?

Thyroid ◽  
2000 ◽  
Vol 10 (8) ◽  
pp. 727-729 ◽  
Author(s):  
Sebastiano Venturi ◽  
Francesco M. Donati ◽  
Alessandro Venturi ◽  
Mattia Venturi
Keyword(s):  
Iodine Deficiency ◽  
Terrestrial Life

More than Breathing Air: Evolutionary Drivers and Physiological Implications of an Amphibious Lifestyle in Fishes

Physiology ◽  
2021 ◽  
Vol 36 (5) ◽  
pp. 307-314 ◽  
Author(s):  
Andy J. Turko ◽  
Giulia S. Rossi ◽  
Patricia A. Wright
Keyword(s):  
Scoring System ◽  
Interspecific Variation ◽  
Evolutionary Physiology ◽  
Air Breathing ◽  
Evolutionary Origins ◽  
Amphibious Fishes

Amphibious and aquatic air-breathing fishes both exchange respiratory gasses with the atmosphere, but these fishes differ in physiology, ecology, and possibly evolutionary origins. We introduce a scoring system to characterize interspecific variation in amphibiousness and use this system to highlight important unanswered questions about the evolutionary physiology of amphibious fishes.

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