Variations of bioluminescence intensity in the ophiuroid Amphipholis squamata (Delle Chiaje, 1828)

2020 ◽  
pp. 409-409
Author(s):  
D. Deheyn ◽  
J. Mallefet ◽  
M. Jangoux
Keyword(s):  
Bioluminescence Intensity ◽  
Amphipholis Squamata

scholarly journals Adenosine Triphosphate Measurement in Deep Sea Using a Microfluidic Device

Micromachines ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 370 ◽  
Author(s):  
Tatsuhiro Fukuba ◽  
Takuroh Noguchi ◽  
Kei Okamura ◽  
Teruo Fujii
Keyword(s):  
Adenosine Triphosphate ◽  
Microfluidic Device ◽  
Deep Sea ◽  
Temperature Sensor ◽  
Biochemical Parameter ◽  
Underwater Vehicle ◽  
Luciferase Assay ◽  
Bioluminescence Intensity

Total ATP (adenosine triphosphate) concentration is a useful biochemical parameter for detecting microbial biomass or biogeochemical activity anomalies in the natural environment. In this study, we describe the development and evaluation of a new version of in situ ATP analyzer improved for the continuous and quantitative determination of ATP in submarine environments. We integrated a transparent microfluidic device containing a microchannel for cell lysis and a channel for the bioluminescence L–L (luciferin–luciferase) assay with a miniature pumping unit and a photometry module for the measurement of the bioluminescence intensity. A heater and a temperature sensor were also included in the system to maintain an optimal temperature for the L–L reaction. In this study, the analyzer was evaluated in deep sea environments, reaching a depth of 200 m using a remotely operated underwater vehicle. We show that the ATP analyzer successfully operated in the deep-sea environment and accurately quantified total ATP within the concentration lower than 5 × 10−11 M.

Descriptive and illustrated diagnosis of Ophiuroidea fauna (Echinodermata) in the shallow waters of North-eastern Brazil

2015 ◽  
Vol 8 ◽  
Author(s):  
Fabilene Gomes Paim ◽  
Maria Cecília Guerrazzi ◽  
Michela Borges
Keyword(s):  
Brittle Star ◽  
Shallow Waters ◽  
Bottom Substrate ◽  
Eastern Brazil ◽  
North Eastern ◽  
Amphipholis Squamata ◽  
Biological Substrates ◽  
Almost All ◽  
First Time ◽  
Ophiocoma Echinata

In this study, we present descriptions, illustrations, comments, and bathymetric and geographic distributions of the brittle star species related to the estuary region of Camamu Bay, located in the State of Bahia, Brazil. The brittle star fauna lives on biological substrates, sand bottoms, mud and rubble in the Camamu Bay and comprises 12 species divided into five families. Almost all of them are common in the tropical and subtropical fauna of the regions of shallow water.Ophiophragmus filograneusis reported for the first time in Bahia, and nine other species are recorded for the first time in Camamu Bay:Amphipholis januarii, Amphipholis squamata, Ophiophragmus filograneus, Ophiostigma isocanthum,Ophioderma cinerea, Ophioderma januarii, Ophiactis lymani, Ophiactis savignyi andOphiocoma echinata.The results suggest that the ophiuroid assemblages are strongly affected by marine currents as well as by different kinds of bottom substrate.

Study of Amphipholis squamata luminescence

2020 ◽  
pp. 125-130
Author(s):  
J. Mallefet ◽  
P. Vanhoutte ◽  
F. Baguet
Keyword(s):  
Amphipholis Squamata

IS THERE A LINK BETWEEN MORPHOLOGICAL, PHYSIOLOGICAL AND GENETIC VARIABILITY OF THE OPHIUROID AMPHIPHOLIS SQUAMATA?

2000 ◽  
Vol 50 (3) ◽  
pp. 355-363 ◽  
Author(s):  
Samuel Dupont ◽  
Stephen Chaufer ◽  
Élie Poulin ◽  
Jean-Pierre Féral ◽  
Jérôme Mallefet
Keyword(s):  
Genetic Variability ◽  
Amphipholis Squamata
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