The role of dermal photoreceptors during the sea lamprey (Petromyzon marinus) spawning migration

2008 ◽  
Vol 194 (11) ◽  
pp. 921-928 ◽  
Author(s):  
Thomas R. Binder ◽  
D. Gordon McDonald
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Spawning Migration

Epidermal pigmentation in the sea lamprey Petromyzon marinus L.

1973 ◽  
Vol 51 (1) ◽  
pp. 101-104 ◽  
Author(s):  
Edward Kott
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Spawning Migration ◽  
Breakdown Product ◽  
Bile Pigment ◽  
Mucus Layer ◽  
Color Development

During the spawning migration, the overall color of the sea lamprey (Petromyzon marinus L.) becomes progressively more orange. This color development is not due to the chromatophores of the dermis, since the pigment involved is present in either the epidermis and (or) the outer mucus layer. The color, instead, is resultant upon an increase in the concentration of bilirubin, a bile pigment produced as a breakdown product of hemoglobin.

Sea lamprey (Petromyzon marinus L.) spawning migration in the Vouga river basin (Portugal): poaching impact, preferential resting sites and spawning grounds

Hydrobiologia ◽  
2007 ◽  
Vol 582 (1) ◽  
pp. 121-132 ◽  
Author(s):  
N. O. Andrade ◽  
B. R. Quintella ◽  
J. Ferreira ◽  
S. Pinela ◽  
I. Póvoa ◽  
...  
Keyword(s):  
River Basin ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Spawning Migration ◽  
Spawning Grounds ◽  
Resting Sites

The role of local ecological knowledge for the conservation and sustainable fisheries of the sea lamprey (Petromyzon marinus Linnaeus, 1758) in the Iberian Peninsula

2020 ◽  
Vol 198 ◽  
pp. 105345
Author(s):  
Heitor Oliveira Braga ◽  
Mário Jorge Pereira ◽  
Joelson Musiello-Fernandes ◽  
Fernando Morgado ◽  
Amadeu M.V.M. Soares ◽  
...  
Keyword(s):  
Iberian Peninsula ◽  
Local Ecological Knowledge ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Ecological Knowledge ◽  
Sustainable Fisheries

Metabolic organization of liver and somatic muscle of landlocked sea lamprey,Petromyzon marinus, during the spawning migration

1995 ◽  
Vol 73 (5) ◽  
pp. 916-923 ◽  
Author(s):  
P. J. LeBlanc ◽  
T. E. Gillis ◽  
M. F. Gerrits ◽  
J. S. Ballantyne
Keyword(s):  
Amino Acids ◽  
Ketone Bodies ◽  
Petromyzon Marinus ◽  
Plasma Concentrations ◽  
High Capacity ◽  
Sea Lamprey ◽  
Spawning Migration ◽  
Somatic Muscle ◽  
Nonesterified Fatty Acids ◽  
Metabolic Organization

The metabolic organization of liver and muscle of the landlocked sea lamprey, Petromyzon marinus, during the spring spawning migration was assessed by measuring activities of key enzymes for several metabolic pathways, the oxidative properties of mitochondria, and plasma concentrations of nonesterified fatty acids (NEFAs) and free amino acids. These determinations indicate that several metabolic sources are used to fuel the energy requirements of muscle. Lamprey muscle has a high capacity to oxidize lipids but the plasma NEFAs are lower than those reported for other species. Of the NEFAs measured in plasma, 18:0 was prominent, accounting for 23% of the total NEFA content of the plasma. High plasma concentrations of ketogenic amino acids and high levels of tissue ketogenic/ketolytic enzyme activities indicate that ketone bodies may also be a major fuel source for migrating sea lampreys. Based on mitochondrial oxidation and enzyme measurements, glutamine catabolism in somatic muscle of lampreys is less important than in other fish red muscle.

Decline and Recovery of the Lake Superior Gull Island Reef Lake Trout (Salvelinus namaycush) Population and the Role of Sea Lamprey (Petromyzon marinus) Predation

1980 ◽  
Vol 37 (11) ◽  
pp. 2074-2080 ◽  
Author(s):  
Bruce L. Swanson ◽  
Donald V. Swedberg
Keyword(s):  
Lake Trout ◽  
Lake Superior ◽  
Petromyzon Marinus ◽  
Total Mortality ◽  
Mortality Rates ◽  
Sea Lamprey ◽  
Salvelinus Namaycush ◽  
Steady Increase ◽  
Egg Deposition

The Gull Island Reef lake trout (Salvelinus namaycush) population was one of the few in Lake Superior that was not annihilated by the combined effects of excessive fishing and sea lamprey (Petromyzon marinus) predation. Following control of the lamprey in the early 1960s, this population of lake trout began a slow but steady increase in the average age and numbers of lake trout. Total annual mortality rates for spawning lake trout were 32% for age VI fish, 48% for ages VII–VIII, and 75% for ages IX and older. These total mortality rates included a 7.3% exploitation rate u, a 20% natural mortality n, and annual lamprey-induced mortalities of 6% for ages V–VI, 24%, for ages VII–VIII, and 56% for ages IX and older fish. The estimated number of lake trout eggs deposited annually on Gull Island Reef from 1964 to 1979 ranged from 3.3 million eggs in 1965 to 28 million eggs in 1979, with a mean of 9 million eggs per year. At present levels of lamprey predation, the estimated egg to spawning fish return rate on Gull Island Reef is 0.18%.Key words: lake trout, sea lamprey, survival, population structure, egg deposition

scholarly journals Osmoregulatory role of the intestine in the sea lamprey (Petromyzon marinus)

2020 ◽  
Vol 318 (2) ◽  
pp. R410-R417 ◽  
Author(s):  
A. Barany ◽  
C. A. Shaughnessy ◽  
J. Fuentes ◽  
J. M. Mancera ◽  
S. D. McCormick
Keyword(s):  
Water Absorption ◽  
Salinity Tolerance ◽  
Ex Vivo ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Posterior Intestine ◽  
Direct Exposure ◽  
Plasma Chloride ◽  
Anterior Intestine

Lampreys are the most basal vertebrates with an osmoregulatory strategy. Previous research has established that the salinity tolerance of sea lamprey increases dramatically during metamorphosis, but underlying changes in the gut have not been examined. In the present work, we examined changes in intestinal function during metamorphosis and seawater exposure of sea lamprey ( Petromyzon marinus). Fully metamorphosed juvenile sea lamprey had 100% survival after direct exposure to 35 parts per thousand seawater (SW) and only slight elevations in plasma chloride (Cl−) levels. Drinking rates of sea lamprey juveniles in seawater were 26-fold higher than juveniles in freshwater (FW). Na+-K+-ATPase (NKA) activity in the anterior and posterior intestine increased 12- and 3-fold, respectively, during metamorphosis, whereas esophageal NKA activity was lower than in the intestine and did not change with development. Acclimation to SW significantly enhanced NKA activity in the posterior intestine but did not significantly change NKA activity in the anterior intestine, which remained higher than that in the posterior intestine. Intestinal Cl− and water uptake, which were observed in ex vivo preparations of anterior and posterior intestine under both symmetric and asymmetric conditions, were higher in juveniles than in larvae and were similar in magnitude of those of teleost fish. Inhibition of NKA by ouabain in ex vivo preparations inhibited intestinal water absorption by 64%. Our results indicate drinking and intestinal ion and water absorption are important to osmoregulation in SW and that preparatory increases in intestinal NKA activity are important to the development of salinity tolerance that occurs during sea lamprey metamorphosis.

scholarly journals Demography of sea lamprey (Petromyzon marinus) ammocoete populations in relation to potential spawning-migration obstructions

2017 ◽  
Vol 27 (4) ◽  
pp. 764-772 ◽  
Author(s):  
A. D. Nunn ◽  
R. J. Taylor ◽  
I. G. Cowx ◽  
R. A. A. Noble ◽  
J. D. Bolland ◽  
...  
Keyword(s):  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Spawning Migration
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