An Investigation of the Electrical "Spike" Potentials Produced by the Sea Lamprey (Petromyzon marinus) in the Water Surrounding the Head Region. II.

1957 ◽  
Vol 14 (2) ◽  
pp. 145-151 ◽  
Author(s):  
H. Kleerekoper ◽  
Kira Sibakin
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Head Region ◽  
Region Ii ◽  
Respiratory Movements ◽  
Eye Region

The rhythmically recurring spike potentials emitted by Petromyzon marinus are synchronous with the external respiratory movements but are not emitted through the branchial pores. Only total electrical shielding of the probranchial body eliminates these potentials from the water surrounding the animal. The principal area of emission is located in the eye region immediately cephalad of the first pair of branchial pores, in the area overlying the junction of the probranchial muscle and the hypobranchial branch of the parietalis. Probing of the skin with electrodes shows potentials of 1 millivolt on the surface of this area. These potentials are more than tenfold those recorded on any other part of the skin. It is assumed that the spike potentials described previously are emitted from the area defined above.

Spike Potentials produced by the Sea Lamprey (Petromyzon marinus) in the Water surrounding the Head Region

Nature ◽  
1956 ◽  
Vol 178 (4531) ◽  
pp. 490-491 ◽  
Author(s):  
HERMAN KLEEREKOPER ◽  
KIRA SIBAKIN
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Head Region

An Investigation of the Electrical "Spike" Potentials Produced by the Sea Lamprey (Petromyzon marinus) in the Water Surrounding the Head Region

1956 ◽  
Vol 13 (3) ◽  
pp. 375-383 ◽  
Author(s):  
H. Kleerekoper ◽  
Kira Sibakin
Keyword(s):  
Electric Field ◽  
Fresh Water ◽  
Petromyzon Marinus ◽  
Longitudinal Axis ◽  
Sea Lamprey ◽  
Light Conditions ◽  
Head Region ◽  
Experimental Conditions ◽  
Gill Opening ◽  
Adult Lamprey

In the water surrounding the head of Petromyzon marinus electric triphasic spike potentials can be recorded which recur rhythmically at 0.4-second intervals and are synchronous with the externally visible movement of respiration. At a distance of 15 to 20 mm. from the animal, above the eye region, the potentials are from 200–300 μv in an adult lamprey, in fresh water. The electric field produced by these potentials extends several centimeters frontwards of the head depending on experimental conditions and factors now being studied. Posterior to the gill openings the potentials taper off sharply and no spikes could be recorded 50–70 mm. posterior to the last gill opening. The field is symmetrical around the longitudinal axis of the animal under the experimental conditions described. Strychnine and cocaine do not affect the characteristics of the spikes but curare decreases their potential considerably, depending on amounts injected and the condition of the experimental animal. Light conditions do not affect the production of the spikes. The possible function of the electric field for the sea lamprey is discussed.

Classification of Sea Lamprey (Petromyzon marinus) Attack Marks on Great Lakes Lake Trout (Salvelinus namaycush)

1980 ◽  
Vol 37 (11) ◽  
pp. 1989-2006 ◽  
Author(s):  
Everett Louis King Jr.
Keyword(s):  
Great Lakes ◽  
Lake Trout ◽  
Petromyzon Marinus ◽  
Attachment Site ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Oral Disc ◽  
Field Assessment ◽  
Sea Lampreys

Criteria for the classification of marks inflicted by sea lamprey (Petromyzon marinus) into nine categories were developed from laboratory studies in an attempt to refine the classification system used in field assessment work. These criteria were based on characteristics of the attachment site that could be identified under field conditions by unaided visual means and by touching the attachment site. Healing of these marks was somewhat variable and was influenced by the size of lamprey, duration of attachment, severity of the wound at lamprey detachment, season and water temperature, and by other less obvious factors. Even under laboratory conditions staging of some wounds was difficult, especially at low water temperatures. If these criteria are to be used effectively and with precision in the field, close examination of individual fish may be required. If the feeding and density of specific year-classes of sea lampreys are to be accurately assessed on an annual basis, close attention to the wound size (as it reflects the size of the lamprey's oral disc) and character of wounds on fish will be required as well as consideration of the season of the year in which they are observed.Key words: sea lamprey, attack marks, lake trout, Great Lakes

Evidence that 3-keto petromyzonol sulphate specifically attracts ovulating female sea lamprey, Petromyzon marinus

2005 ◽  
Vol 70 (5) ◽  
pp. 1037-1045 ◽  
Author(s):  
Michael J. Siefkes ◽  
Scott R. Winterstein ◽  
Weiming Li
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey

Mercury accumulation in sea lamprey (Petromyzon marinus) from Lake Huron

2014 ◽  
Vol 470-471 ◽  
pp. 1313-1319 ◽  
Author(s):  
Charles P. Madenjian ◽  
Nicholas S. Johnson ◽  
Michael J. Siefkes ◽  
John M. Dettmers ◽  
Joel D. Blum ◽  
...  
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Lake Huron ◽  
Mercury Accumulation
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