scholarly journals Swimming direction of the glass catfish is responsive to magnetic stimulation

2020 ◽  
Author(s):  
Ryan D. Hunt ◽  
Ryan C. Ashbaugh ◽  
Mark Reimers ◽  
Lalita Udpa ◽  
Gabriela Saldana De Jimenez ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetic Stimulation ◽  
State Of The Art ◽  
Marine Species ◽  
Valuable Insight ◽  
Magnetic Field Direction ◽  
Static Magnetic Fields ◽  
Animal Tracking ◽  
Swimming Direction ◽  
Ampullary Organ

AbstractSeveral marine species have developed a magnetic perception that is essential for navigation and detection of prey and predators. One of these species is the transparent glass catfish that contains an ampullary organ dedicated to sense magnetic fields. Here we examine the behavior of the glass catfish in response to static magnetic fields which will provide valuable insight on function of this magnetic response. By utilizing state of the art animal tracking software and artificial intelligence approaches, we quantified the effects of magnetic fields on the swimming direction of glass catfish. The results demonstrate that glass catfish placed in a radial arm maze, consistently swim away from magnetic fields over 20 µT and show adaptability to changing magnetic field direction and location.

scholarly journals Swimming direction of the glass catfish is responsive to magnetic stimulation

PLoS ONE ◽  
2021 ◽  
Vol 16 (3) ◽  
pp. e0248141
Author(s):  
Ryan D. Hunt ◽  
Ryan C. Ashbaugh ◽  
Mark Reimers ◽  
Lalita Udpa ◽  
Gabriela Saldana De Jimenez ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Magnetic Stimulation ◽  
State Of The Art ◽  
Marine Species ◽  
Valuable Insight ◽  
Magnetic Field Direction ◽  
Static Magnetic Fields ◽  
Animal Tracking ◽  
Swimming Direction ◽  
Ampullary Organ

Several marine species have developed a magnetic perception that is essential for navigation and detection of prey and predators. One of these species is the transparent glass catfish that contains an ampullary organ dedicated to sense magnetic fields. Here we examine the behavior of the glass catfish in response to static magnetic fields which will provide valuable insight on function of this magnetic response. By utilizing state of the art animal tracking software and artificial intelligence approaches, we quantified the effects of magnetic fields on the swimming direction of glass catfish. The results demonstrate that glass catfish placed in a radial arm maze, consistently swim away from magnetic fields over 20 μT and show adaptability to changing magnetic field direction and location.

The Analgesic Effects of Static Magnetic Fields

2021 ◽  
Vol 42 (2) ◽  
pp. 115-127
Author(s):  
Yixiang Fan ◽  
Xinmiao Ji ◽  
Lei Zhang ◽  
Xin Zhang
Keyword(s):  
Magnetic Fields ◽  
Static Magnetic Fields ◽  
Analgesic Effects

Safety evaluation of mice exposed to 7.0–33.0 T high‐static magnetic fields

2020 ◽  
Author(s):  
Xiaofei Tian ◽  
Yue Lv ◽  
Yixiang Fan ◽  
Ze Wang ◽  
Biao Yu ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Safety Evaluation ◽  
Static Magnetic Fields

Magnetophoresis Effects on the Flow Characteristics of Oil-Based Ferrofluids in Rectangular Enclosures

2015 ◽  
Vol 15 (10) ◽  
pp. 7451-7456
Author(s):  
Hyeon-Seok Seo ◽  
Jin-Hyo Boo ◽  
Youn-Jea Kim
Keyword(s):  
Magnetic Fields ◽  
Permanent Magnet ◽  
Flow Characteristics ◽  
Flow Fields ◽  
Working Fluid ◽  
Magnetic Flux Density ◽  
Magnetic Field Direction ◽  
Analysis Model ◽  
Rectangular Enclosure ◽  
Flow Phenomena

This study numerically investigated the flow characteristics in a rectangular enclosure filled with oil-based ferrofluid (EFH-1, Ferrotec.) under the influence of external magnetic fields. The rectangular enclosure contained obstacles with different shapes, such as a rectangle and a triangle mounted on the top and bottom wall surfaces. In order to generate external magnetic fields, a permanent magnet was located in the lower part of the rectangular enclosure, and its direction was selected to be either horizontal or vertical. Our results showed that the ferrofluid flow fields were affected by the applied external magnetic field direction and eddy flow phenomena in the working fluid were generated in the vicinity of high magnetic flux density distributions, such as at the edge of the permanent magnet. It was also confirmed that the magnetophoretic force distributions in the analysis model played a significant role in the development of the ferrofluid flow fields.

scholarly journals Stirred but not shaken: population and recruitment genetics of the scallop (Pecten fumatus) in Bass Strait, Australia

2016 ◽  
Vol 73 (9) ◽  
pp. 2333-2341 ◽  
Author(s):  
Jennifer R. Ovenden ◽  
Bree J. Tillett ◽  
Michael Macbeth ◽  
Damien Broderick ◽  
Fiona Filardo ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Allelic Variation ◽  
Open Water ◽  
Marine Species ◽  
Population Connectivity ◽  
Valuable Insight ◽  
Fine Scale ◽  
Scale Population

Abstract We report population genetic structure and fine-scale recruitment processes for the scallop beds (Pecten fumatus) in Bass Strait and the eastern coastline of Tasmania in southern Australia. Conventional population pairwise FST analyses are compared with novel discriminant analysis of principal components (DAPC) to assess population genetic structure using allelic variation in 11 microsatellite loci. Fine-scale population connectivity was compared with oceanic features of the sampled area. Disjunct scallop beds were genetically distinct, but there was little population genetic structure between beds connected by tides and oceanic currents. To identify recruitment patterns among and within beds, pedigree analyses determined the distribution of parent–offspring and sibling relationships in the sampled populations. Beds in northeastern Bass Strait were genetically distinct to adjacent beds (FST 0.003–0.005) and may not contribute to wider recruitment based on biophysical models of larval movement. Unfortunately, pedigree analyses lacked power to further dissect fine-scale recruitment processes including self-recruitment. Our results support the management of disjunct populations as separate stocks and the protection of source populations among open water beds. The application of DAPC and parentage analyses in the current study provided valuable insight into their potential power to determine population connectivity in marine species with larval dispersal.

Sign in / Sign up

Export Citation Format

Share Document