Taxonomy of Raphidascaris spp. (Nematoda, Anisakidae) of fishes, with a redescription of R. acus (Bloch, 1772)

1984 ◽  
Vol 62 (4) ◽  
pp. 685-694 ◽  
Author(s):  
John D. Smith
Keyword(s):  
North America ◽  
Northern Pike ◽  
Esox Lucius ◽  
Marine Fishes ◽  
Pike Esox Lucius ◽  
Geographic Distributions ◽  
Subtropical Oceans ◽  
Species Inquirendae ◽  
Raphidascaris Acus ◽  
Excretory Canal

Raphidascaris acus (Bloch, 1772) is redescribed from specimens from northern pike (Esox lucius) in Ontario. A reduced right excretory canal and a cuticular elevation in the ventral interlabial region are present. Hysterothylacium cayugensis Wigdor, 1918, Ascaris lucii Pearse, 1924, R. laurentianus Richardson, 1937, and R. alius Lyster, 1940 become junior synonyms of R. acus. The latter species, reported from a variety of fishes in Ontario and Quebec, is considered the only valid member of the genus in freshwater in North America and thus is distributed throughout the Holarctic. Four other species are considered valid: R. biwakoensis Fujita, 1928 (= R. gigi Fujita, 1928; = R. plecoglossi Fujita, 1928) from freshwater in Japan, and R. lutiani Olsen, 1952, R. chirocentri Yamaguti, 1935. and R. vicentei Santos, 1970 (= R. atlanticus Rodrigues, 1974; = R. yamagutii Vicente &Santos, 1974; = R. camura Deardorff &Overstreet, 1981) from marine fishes. The latter two species are similar if not identical and are broadly distributed in inshore subtropical oceans. The following are species inquirendae: R. adelinae (Condorelli-Francaviglia, 1898), R. anchoviellae Chandler, 1935, R. lophii (Wu, 1949), R. panijii Khan &Yassen, 1969, and R. synodi Paruchin, 1973. The broad host and geographic distributions of Raphidascaris spp. may indicate the genus is relatively old. The systematics of the Ascaridoidea is currently being revised. Reviews of other anisakid genera are necessary before relationships among Raphidascaris spp. and other genera can be determined.

Pleistocene Pike, Esox lucius, and Esox sp., from the Yukon Territory and Ontario

1970 ◽  
Vol 7 (4) ◽  
pp. 1130-1138 ◽  
Author(s):  
E. J. Crossman ◽  
C. R. Harington
Keyword(s):  
North America ◽  
Late Pleistocene ◽  
Northern Pike ◽  
Esox Lucius ◽  
Yukon Territory ◽  
River Valley ◽  
Last Interglacial ◽  
Pike Esox Lucius ◽  
Don River

Two fish dentary fragments from Late Pleistocene deposits in the Old Crow area, Yukon Territory are referable to the northern pike (Esox lucius). One tooth fragment from the last interglacial (Sangamon) deposits in the Don River Valley, Toronto, Ontario, is identified as Esox sp. The Yukon dentaries are the first fossils definitely attributable to Esox lucius in North America, and these records are the first for the suborder Esocoidei in Canada.

Genetic Variation and Postglacial Dispersal of Populations of Northern Pike (Esox lucius) in North America

1987 ◽  
Vol 44 (3) ◽  
pp. 556-561 ◽  
Author(s):  
James E. Seeb ◽  
Lisa W. Seeb ◽  
David W. Oates ◽  
Fred M. Utter
Keyword(s):  
North America ◽  
Mississippi River ◽  
Genetic Relationships ◽  
Missouri River ◽  
Northern Pike ◽  
Esox Lucius ◽  
Western Canada ◽  
River Population ◽  
River Drainage ◽  
Pike Esox Lucius

We studied the genetic relationships and postglacial dispersal of northern pike (Esox lucius) populations in North America using allozyme data. Allelic products of up to 65 protein coding loci were examined in eight populations: five from drainages in western Canada, flowing into Hudson Bay and the Beaufort Sea; two from the Missouri River drainage, flowing into the Mississippi River; and one from the upper Mississippi River drainage, flowing into the Gulf of Mexico. Only two polymorphic loci were identified, Est-1 and Ck-1, and the average observed heterozygosity was only 0.001, much lower than that observed in most teleosts. All of the populations from the drainages in western Canada and the Missouri River were genetically identical. The Mississippi River population was unique, expressing Ck-1 (140), an allele nearly absent in all other populations, at a frequency of 0.99. Our data suggest that the Missouri River drainage, during the period when it was isolated from the Mississippi River, was the southern refugium from which northern pike radiated during deglaciation.

Catchments affect growth rate of Northern Pike, Esox lucius, in subarctic lakes

2021 ◽  
Vol 83 (3) ◽  
Author(s):  
Mehdi Moslemi-Aqdam ◽  
George Low ◽  
Mike Low ◽  
Brian A. Branfireun ◽  
Heidi K. Swanson
Keyword(s):  
Growth Rate ◽  
Northern Pike ◽  
Esox Lucius ◽  
Subarctic Lakes ◽  
Pike Esox Lucius

Temporal change estimation of mercury concentrations in northern pike (Esox lucius L.) in Swedish lakes

Chemosphere ◽  
2012 ◽  
Vol 86 (5) ◽  
pp. 439-445 ◽  
Author(s):  
Staffan Åkerblom ◽  
Mats Nilsson ◽  
Jun Yu ◽  
Bo Ranneby ◽  
Kjell Johansson
Keyword(s):  
Temporal Change ◽  
Northern Pike ◽  
Esox Lucius ◽  
Pike Esox Lucius

Effects of Liming on the Distribution of Cadmium in Water, Sediment, and Organisms in a Swedish Lake

1988 ◽  
Vol 45 (7) ◽  
pp. 1154-1162 ◽  
Author(s):  
Paul Andersson ◽  
Hans Borg
Keyword(s):  
Lake Water ◽  
Cadmium Concentration ◽  
Northern Pike ◽  
Esox Lucius ◽  
Suspended Particles ◽  
Fish Liver ◽  
Free Swimming ◽  
Pike Esox Lucius ◽  
Insect Larva ◽  
Before And After

We studied the cadmium concentrations in water, sediment, suspended particles, a free-swimming insect larva (Chaoborus), a sediment-bound insect larva (Chironomus), and liver of northern pike (Esox lucius) before and after liming operations in Lake Långsjön, Sweden. In accordance with the higher pH levels obtained in the lake water after the limings, cadmium concentration decreased in the water but increased in the sediment. Cadmium concentration in fish liver and Chironomus decreased after the limings whereas the concentration in Chaoborus larvae increased after the first liming. Possible mechanisms are discussed.

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