Occurrence of a tumour-like abnormality in the telson skeleton of the brine shrimp Artemia (Branchiopoda, Anostraca)

Crustaceana ◽  
2019 ◽  
Vol 92 (2) ◽  
pp. 247-251
Author(s):  
Z.-C. Wang ◽  
J.-Y. Wu ◽  
Alireza Asem
Keyword(s):  
Brine Shrimp ◽  
Compound Eyes ◽  
Laboratory Studies ◽  
Natural Habitats ◽  
Morphological Abnormalities

Abstract Malformations of crustaceans have been observed in their natural habitats as well as in laboratory studies. Two patterns of morphological abnormalities have been recorded in species of the brine shrimp genus Artemia, including a gynandromorphic pattern and a specimen with three compound eyes. Here we report a hitherto unknown pattern of morphological deformation, viz., a tumour-like abnormality that occurred in the telson skeleton of a specimen of Artemia from China.

Aspects of the Water, Electrolyte and Carbohydrate Physiology of the Silvereye, Zosterops Lateralis (Aves).

1983 ◽  
Vol 31 (5) ◽  
pp. 695 ◽  
Author(s):  
IJ Rooke ◽  
SD Bradshaw ◽  
RA Langworthy
Keyword(s):  
Natural Habitat ◽  
Tritiated Water ◽  
Free Water ◽  
Laboratory Studies ◽  
Turnover Rates ◽  
Natural Habitats ◽  
Water Influx ◽  
Zosterops Lateralis ◽  
Total Body ◽  
Free Ranging

Total body water content (TBW) and TBW turnover were measured by means of tritiated water (HTO) in free-ranging populations of silvereyes, Zosterops lateralis, near Margaret River, W.A. Birds were studied in their natural habitats during spring and summer, and compared with a vineyard population in summer. In the natural habitat TBW content was found to be 77.6% in spring, which was not significantly different from that measured in summer (78.3%). Birds in vineyards in summer, however, were dehydrated, with a TBW content of 69.4%. Calculated rates of water influx for spring, summer and summer vineyards birds were 1.44,2.20 and 0.65 ml g.day-' respectively. These water turnover rates are much higher than those of any other bird yet studied. Dehydration was marked in the vineyard birds, with a significantly lower TBW content and an average net water loss of 0.63 ml day-'. Laboratory studies showed that silvereyes have a low tolerance to sodium loading. Their tolerance is, however, quite adequate for them to drink the most concentrated free water available to them in the field. Ingestion of concentrated sugar solutions of up to 25% did not provoke an osmotic diuresis and thus cannot account for the dehydration and negative water balance of vineyard birds.

scholarly journals BRINE SHRIMP TERATOGENIC SCREENING TEST ON SOME SELECTED PLANTS

2017 ◽  
Vol 10 (8) ◽  
pp. 96
Author(s):  
Meti Widiya Lestari ◽  
Irda Fidrianny ◽  
Ayda T Yusuf ◽  
Andreanus A Soemardji
Keyword(s):  
Body Length ◽  
Screening Test ◽  
Brine Shrimp ◽  
Punica Granatum ◽  
Test Substance ◽  
Foeniculum Vulgare ◽  
Morphological Abnormalities ◽  
Third Stage ◽  
Elephantopus Scaber ◽  
Artemia Cysts

  Objectives: The aims of this research were to analyze teratogenic properties on some selected plants which often used for woman’s health were pomegranate (Punica granatum L.) pericarp, coriander (Coriandrum sativum L.) seeds, liman (Elephantopus scaber L.) leaves, fennel (Foeniculum vulgare M.) seeds, and kaempferia (Kaempferia galanga L.) rhizomes using brine shrimp teratogenic screening test (BSTST) method.Methods: Artemia cysts were hatched into first stage nauplii then taken and put into seawater medium which contain test substance and kept alive until the second stage, third stage, and fourth stage and then observed number of deaths, morphological abnormalities, body length, and retarded of development for each stage.Results: Hatchability of cysts in fennel seeds compared extracts 1 and 0.5 mg/ml, coriander seeds extract 1 mg/ml, pomegranate rinds extract 6 mg/ml, and liman leaves extracts 6, 3, and 1.5 mg/ml were significantly different to control (p<0.05). Survival nauplii in fennel seeds extracts 1 and 0.5 mg/ml and liman leaves extracts 6 and 3 mg/ml were significantly different to control (p<0.05). The morphological abnormalities were exposed on coriander seeds extract 1 mg/ml, liman leaves extract 6 mg/ml, and pomegranate rinds extract 3 mg/ml. Nauplii with retarded development were presented on fennel seeds extracts 1 and 0.5 mg/ml, coriander seeds extracts 1 and 0.25 mg/ml, pomegranate rinds extracts 6, 3, and 1.5 mg/ml, and liman leaves extracts 3 and 1.5 mg/ml. Nauplii body length on plants extract showed no significantly difference compared to control.Conclusion: Based on BSTST, fennel seed and pomegranate rind extracts had no teratogenic effect, kaempferia rhizomes act as larvicide its analog in mamalia as embryo lethal, while coriander seeds and liman leaves extracts potentially had teratogenic properties.

Adaptation to Heat and Water Shortage in Large, Arid-Zone Mammals

Physiology ◽  
2014 ◽  
Vol 29 (3) ◽  
pp. 159-167 ◽  
Author(s):  
Andrea Fuller ◽  
Robyn S. Hetem ◽  
Shane K. Maloney ◽  
Duncan Mitchell
Keyword(s):  
Arid Zone ◽  
Water Shortage ◽  
Large Mammals ◽  
Laboratory Studies ◽  
Selective Brain Cooling ◽  
Thermoregulatory Behavior ◽  
Natural Habitats ◽  
Free Living ◽  
Physiological Capacity ◽  
Adaptation To Heat

Although laboratory studies of large mammals have revealed valuable information on thermoregulation, such studies cannot predict accurately how animals respond in their natural habitats. Through insights obtained on thermoregulatory behavior, body temperature variability, and selective brain cooling in free-living mammals, we show here how we can better understand the physiological capacity of large mammals to cope with hotter and drier arid-zone habitats likely with climate change.

scholarly journals Dispersal of aquatic invertebrates by lesser black-backed gulls and white storks within and between inland habitats

2021 ◽  
Vol 84 (1) ◽  
Author(s):  
Víctor Martín-Vélez ◽  
Marta I. Sánchez ◽  
Ádam Lovas-Kiss ◽  
Francisco Hortas ◽  
Andy J. Green
Keyword(s):  
Brine Shrimp ◽  
Aquatic Invertebrates ◽  
High Mobility ◽  
First Record ◽  
Metapopulation Dynamics ◽  
Laboratory Studies ◽  
Aquatic Habitats ◽  
South West ◽  
Larus Fuscus ◽  
White Storks

AbstractWaterbirds can transport aquatic invertebrates internally, contributing to metapopulation dynamics between aquatic habitats in a terrestrial matrix. However, research into this dispersal process to date has focused on individual field sites or laboratory studies. We investigated the invertebrates dispersed by endozoochory by the lesser black-backed gull Larus fuscus wintering in Andalusia, south-west Spain in 2016–2017, comparing seven sites interconnected by their movements, with different degrees of anthropogenization [three landfills, two saltpan complexes, a natural lake, and a large (370 km2) ricefield area]. In the ricefields, we also compared invertebrates dispersed by gulls with those dispersed by the larger white stork Ciconia ciconia. A total of 642 intact invertebrates and their propagules (mainly plumatellid bryozoans, cladocerans, and other branchiopods) were recorded in excreta (faeces and pellets) from gulls and storks. A greater diversity and abundance of invertebrates were recorded in ricefields, notably 43 individuals of the alien snail Physella acuta. One snail was still alive in a gull pellet 3 weeks after being stored in a fridge. This represents the first record of snail dispersal within waterbird pellets. Viability was also confirmed for the cladoceran Macrothrix rosea recorded in ricefields, and the alien brine shrimp Artemia franciscana recorded mainly in saltpans. In ricefields, gulls and pellets had significantly fewer propagules and fewer taxa per gram of excreta than storks and faeces, respectively. Through their high mobility, gulls and storks can disperse invertebrates between different natural and artificial habitats, and even to landfills. They can promote metapopulation dynamics for native bryozoans and branchiopods, but also the spread of invasive snails and brine shrimp.

Laboratory studies on the culture of the brine shrimp Artemia using organic wastes

1995 ◽  
Vol 51 (2-3) ◽  
pp. 265-267 ◽  
Author(s):  
J.A. Basil ◽  
V.K.S. Nair ◽  
A.J. Thatheyus
Keyword(s):  
Brine Shrimp ◽  
Organic Wastes ◽  
Laboratory Studies

scholarly journals Population dynamics of the brine shrimp Artemia persimilis Piccinelli & Prosdocimi, 1968 (Crustacea, Anostraca) in a hypersaline lake of the Central Pampa (Argentina)

2017 ◽  
Vol 17 (3) ◽  
Author(s):  
Alicia M. Vignatti ◽  
Gabriela C. Cabrera ◽  
Santiago A. Echaniz
Keyword(s):  
Brine Shrimp ◽  
High Salinity ◽  
Hypersaline Lake ◽  
Laboratory Studies ◽  
Natural Conditions ◽  
Present Information ◽  
Biological Aspects ◽  
The Mean ◽  
Density And Biomass ◽  
Artemia Persimilis

Abstract The anostracan Artemia is one of the few organisms that can inhabit hypersaline lakes. In Argentina, this genus is represented by two species: the invasive A. franciscana Kellogg, 1906 and the autochthonous A. persimilis Piccinelli & Prosdocimi, 1968, the latter being the only one recorded in the province of La Pampa. Some of the biological aspects of A. persimilis are known based on laboratory studies, and data on its ecology in natural conditions are scarce. The aim of this work is to present information on the density, biomass, and population structure of A. persimilis in relation to environmental variables in Utracán, a hypersaline lake of the semiarid Central Pampa of Argentina. Water and zooplankton samples were taken monthly from May 2009 until August 2010. The mean density and biomass were 56.98 ind.L-1 (± 106.64) and 1.23 mg.L-1 (± 1.35), respectively. The species was negatively affected by salinity, and it was absent between November and February, when salinity exceeded 320 g.L-1. However, when it was present, even during the months of higher salinity, a high proportion of naupliar stages was found, which could indicate that, in nature, A. persimilis can reproduce with high salinity. Although it has been indicated that A. persimilis could be displaced by A. franciscana, the highest tolerance of the former at low temperatures, which allowed the population to continue reproducing at values close to 3°C, would limit its displacement. However, an increase in the temperature of lakes as a result of global warming could modify this situation and allow the advance of the introduced species to the south.

Hydrogen Cyanide Polymers from the Impact of Comet P/Shoemaker-Levy 9 on Jupiter

1997 ◽  
Vol 161 ◽  
pp. 179-187
Author(s):  
Clifford N. Matthews ◽  
Rose A. Pesce-Rodriguez ◽  
Shirley A. Liebman
Keyword(s):  
Amino Acids ◽  
Solar System ◽  
Hydrogen Cyanide ◽  
Nitrogen Heterocycles ◽  
Laboratory Studies ◽  
Heterogeneous Solids ◽  
The Many ◽  
Comet Halley ◽  
The Impact ◽  
By Products

AbstractHydrogen cyanide polymers – heterogeneous solids ranging in color from yellow to orange to brown to black – may be among the organic macromolecules most readily formed within the Solar System. The non-volatile black crust of comet Halley, for example, as well as the extensive orangebrown streaks in the atmosphere of Jupiter, might consist largely of such polymers synthesized from HCN formed by photolysis of methane and ammonia, the color observed depending on the concentration of HCN involved. Laboratory studies of these ubiquitous compounds point to the presence of polyamidine structures synthesized directly from hydrogen cyanide. These would be converted by water to polypeptides which can be further hydrolyzed to α-amino acids. Black polymers and multimers with conjugated ladder structures derived from HCN could also be formed and might well be the source of the many nitrogen heterocycles, adenine included, observed after pyrolysis. The dark brown color arising from the impacts of comet P/Shoemaker-Levy 9 on Jupiter might therefore be mainly caused by the presence of HCN polymers, whether originally present, deposited by the impactor or synthesized directly from HCN. Spectroscopic detection of these predicted macromolecules and their hydrolytic and pyrolytic by-products would strengthen significantly the hypothesis that cyanide polymerization is a preferred pathway for prebiotic and extraterrestrial chemistry.

High-voltage electron microscopy of maxillary gland of spirochete-infected brine shrimp: lesion of efferent tubule

1988 ◽  
Vol 46 ◽  
pp. 362-363
Author(s):  
G. E. Tyson ◽  
M. J. Song
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Brine Shrimp ◽  
Natural Populations ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Infected Adult

Natural populations of the brine shrimp, Artemia, may possess spirochete- infected animals in low numbers. The ultrastructure of Artemia's spirochete has been described by conventional transmission electron microscopy. In infected shrimp, spirochetal cells were abundant in the blood and also occurred intra- and extracellularly in the three organs examined, i.e. the maxillary gland (segmental excretory organ), the integument, and certain muscles The efferent-tubule region of the maxillary gland possessed a distinctive lesion comprised of a group of spirochetes, together with numerous small vesicles, situated in a cave-like indentation of the base of the tubule epithelium. in some instances the basal lamina at a lesion site was clearly discontinuous. High-voltage electron microscopy has now been used to study lesions of the efferent tubule, with the aim of understanding better their three-dimensional structure.Tissue from one maxillary gland of an infected, adult, female brine shrimp was used for HVEM study.

Sign in / Sign up

Export Citation Format

Share Document