Order of Succession of Different Types of Infraoral Lamina in Landlocked Sea Lamprey (Petromyzon marinus)

1961 ◽  
Vol 18 (6) ◽  
pp. 1125-1143 ◽  
Author(s):  
V. D. Vladykov ◽  
G. N. Mukerji
Keyword(s):  
New York ◽  
Lake Erie ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
The Other ◽  
Predominant Type ◽  
Different Types ◽  
Basal Portion ◽  
Type Intermediate

Infraoral lamina were studied of 630 lampreys from Lake Erie, Ontario, Lake Seneca, New York, and the Père Marquette River, Michigan. The number of cusps on the first set of the lamina is always repeated in consecutive new sets, but the size of the cusps and their orientation vary. The width of the lamina increases slowly from 4.5 to 16.5 mm, with successive replacements of the corneous sheath. The main types of lamina are: normal (teeth large, evenly spaced, their points nearly parallel), inclined (teeth large, evenly spaced, their tips inclined mesad), and rosebud (teeth very small and clustered near the middle of the lamina; concentric lines on the basal portion). There is also the type intermediate between inclined and normal. Newly transformed lampreys and others less than 180 mm long have normal laminae. The rosebud lamina is characteristic of half-grown specimens, being most frequent among lampreys 250–400 mm long. In adults, feeding in lakes, the predominant type is the inclined lamina. In spawning specimens the normal lamina is most characteristic. Thus the usual succession throughout life is: normal, rosebud, inclined, and finally normal again. In spawning specimens there are two new sheaths underneath the old one, one below the other.

Observations on the opisthonephric kidney of the sea lamprey of the Great Lakes, Petromyzon marinus L., at various stages during the life cycle

1970 ◽  
Vol 48 (6) ◽  
pp. 1313-1316 ◽  
Author(s):  
John H. Youson
Keyword(s):  
Life Cycle ◽  
Great Lakes ◽  
Amorphous Material ◽  
Petromyzon Marinus ◽  
Kidney Tissue ◽  
Adult Life ◽  
Sea Lamprey ◽  
The Other ◽  
Larval Life ◽  
Adult Kidney

The kidneys at all stages consist of renal corpuscles, tubules, and an archinephric duct. The kidney of the ammocoete does not contribute to the formation of the adult kidney for at transformation a new kidney is formed. Degeneration of kidney tissue occurs at four stages: in the anterior regions throughout larval life; in the entire ammocoete kidney at transformation; in the anterior regions throughout adult life; in the entire kidney during the spawning migration. Large quantities of amorphous material appear in the interstitium during anterior degeneration of the adult. The other stages involve necrosis followed by the invasion of phagocytes.

Structure and Affinities of Freshwater Sea Lamprey (Petromyzon marinus) Populations

1981 ◽  
Vol 38 (12) ◽  
pp. 1708-1714 ◽  
Author(s):  
Peter F. Brussard ◽  
Marjorie Collings Hall ◽  
Janet Wright
Keyword(s):  
New York ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Population Subdivision ◽  
Starch Gel Electrophoresis ◽  
Clustering Methods ◽  
Test Procedures ◽  
Simultaneous Test ◽  
Population Structuring ◽  
Starch Gel

We have examined genetic differentiation at 23 loci in 12 populations of sea lamprey, Petromyzon marinus, by means of starch gel electrophoresis. Based on two measures of overall genetic distance and two clustering methods, our analysis shows that there are three genetically distinct groups of lamprey in eastern North America: (1) anadromous populations plus those in Lake Champlain, (2) populations in Lake Erie and the upper Great Lakes, and (3) populations in Lake Ontario and three interior New York Lakes (Cayuga, Seneca, and Oneida). Analysis of population subdivision using contiguity partitions and simultaneous test procedures (STP) confirms the above conclusions and offers additional insight into the genetic structure of lamprey in this area.Key words: sea lamprey, Petromyzon marinus; genetic variation, electrophoresis, population structuring

scholarly journals Spiny Softshell (Apalone spinifera) turtles exhibit scarring consistent with attempted lamprey bites

2019 ◽  
Vol 132 (2) ◽  
pp. 120-121
Author(s):  
Christina M. Davy ◽  
Juliana Skuza ◽  
Amelia K. Whitear
Keyword(s):  
Lake Erie ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Freshwater Turtles ◽  
Mark Recapture ◽  
Apalone Spinifera ◽  
Native Silver

We captured 46 Spiny Softshells (Apalone spinifera) during a mark–recapture study on Lake Erie (2012–2015). Six (13%) exhibited circular scars consistent with the bites of small parasitic lampreys. Two species of parasitic lampreys occur in Lake Erie: the invasive Sea Lamprey (Petromyzon marinus) and the native Silver Lamprey (Ichthyostomyzon unicuspis). The scars showed only the marks of the putative teeth surrounding the suctorial mouth, preventing identification based on the position of the supraoral teeth and suggesting that lampreys are rapidly dislodged from the turtles. To our knowledge, this is the first evidence of lampreys biting freshwater turtles.

Importance of Condition Factor and the Influence of Water Temperature and Photoperiod on Metamorphosis of Sea Lamprey Petromyzon marinus

1993 ◽  
Vol 50 (11) ◽  
pp. 2448-2456 ◽  
Author(s):  
J. H. Youson ◽  
J. A. Holmes ◽  
J. A. Guchardi ◽  
J. G. Seelye ◽  
R. E. Beaver ◽  
...  
Keyword(s):  
New York ◽  
Water Temperature ◽  
Condition Factor ◽  
Petromyzon Marinus ◽  
Sea Lamprey ◽  
Minimum Length ◽  
Experimental Animals ◽  
Influence Of Water

The incidence of metamorphosis of larval sea lamprey, Petromyzon marinus, was strongly affected by water temperature but not photoperiod. In a 1991 experiment, the development of metamorphosing animals in 13 °C water was retarded about 1 mo relative to animals metamorphosing at 21 °C and to a population from the Chippewa River, Michigan; the minimum length, weight, and condition factor (CF) of metamorphosing experimental animals were 117 mm, 2.8 g, and 1.50, respectively, and only 4% metamorphosed at 13 °C and 18.9% at 21 °C. In 1992, with a population from the Great Chazy River, New York, 66% of the animals at 13 °C and 84% at 21 °C metamorphosed. The higher incidence of metamorphosis in 1992 is partly related to the use of larvae that were larger than the minima established in 1991. We predicted, using criteria defined below, that 74 and 72% of the animals at 13 and 21 °C, respectively, would metamorphose. Our predictions were consistent with observations at 13 °C and for five of seven replicate tanks at 21 °C. We suggest that a presumptive metamorphosing sea lamprey in landlocked populations should be at least 120 mm long, weigh 3.0 g, and have a CF ≥ 1.50 and that these criteria must be used in conjunction.

Review: Islam and politics in Iranian Kurdistan at a time of revolution: the life of Ahmad Moftizadeh

2017 ◽  
Vol 5 (1) ◽  
pp. 80-87
Author(s):  
Martin Van Bruinessen
Keyword(s):  
New York ◽  
Middle East ◽  
Political Order ◽  
The Other ◽  
Islam And Politics ◽  
Cultural Rights ◽  
Revolutionary Regime

Ali Ezzatyar, The Last Mufti of Iranian Kurdistan: Ethnic and Religious Implications in the Greater Middle East. New York: Palgrave Macmillan, 2016. xv + 246 pp., (ISBN 978-1-137-56525-9 hardback).For a brief period in 1979, when the Kurds had begun confronting Iran’s new Islamic revolutionary regime and were voicing demands for autonomy and cultural rights, Ahmad Moftizadeh was one of the most powerful men in Iranian Kurdistan. He was the only Kurdish leader who shared the new regime’s conviction that a just social and political order could be established on the basis of Islamic principles. The other Kurdish movements were firmly secular, even though many of their supporters were personally pious Muslims.

From the New York Herald to the Italian screen

2017 ◽  
Vol 3 (2) ◽  
pp. 175-193 ◽  
Author(s):  
Katherine Frances Nagels
Keyword(s):  
New York ◽  
The Other ◽  
Comic Strip ◽  
Women In The Workplace

The popular 1907–9 American newspaper comic strip character Fluffy Ruffles was an iconic embodiment of contemporary American femininity between the eras of the Gibson Girl and the later flapper and “it” girl. This article discusses Fluffy Ruffles as a popular phenomenon and incarnation of anxieties about women in the workplace, and how she underwent a metamorphosis in the European press, as preexisting ideas of American youth, wealth, and liberty were grafted onto her character. A decade after her debut in the newspapers, two films—Augusto Genina's partially extant Miss Cyclone (La signorina Ciclone,1916), and Alfredo Robert's lost Miss Fluffy Ruffles (1918)—brought her to the Italian screen. This article looks at how the character was interpreted by Suzanne Armelle and Fernanda Negri Pouget, respectively, drawing on advertisements and the other performances of Negri Pouget to reconstruct the latter. The article is illustrated with drawings and collages based on the author's research.

Fecundity of the sea lamprey (Petromyzon marinus) in Lake Superior

1972 ◽  
Vol 101 (4) ◽  
pp. 718-720 ◽  
Author(s):  
Patrick J. Manion
Keyword(s):  
Lake Superior ◽  
Petromyzon Marinus ◽  
Sea Lamprey

Producers' Response to Changes in Prices and Marketing Policies: A Case Study of Sugarcane and Paddy in Eastern U.P. by S. C. Gupta and A. Majid. New York: Asia Publishing House, 1965.

1968 ◽  
Vol 8 (2) ◽  
pp. 308-309
Author(s):  
Mohammad Irshad Khan
Keyword(s):  
New York ◽  
Time Series ◽  
Time Series Data ◽  
Publishing House ◽  
Economic Incentives ◽  
The Other ◽  
Series Data ◽  
Poor Countries ◽  
Northern India

It is alleged that the agricultural output in poor countries responds very little to movements in prices and costs because of subsistence-oriented produc¬tion and self-produced inputs. The work of Gupta and Majid is concerned with the empirical verification of the responsiveness of farmers to prices and marketing policies in a backward region. The authors' analysis of the respon¬siveness of farmers to economic incentives is based on two sets of data (concern¬ing sugarcane, cash crop, and paddy, subsistence crop) collected from the district of Deoria in Eastern U.P. (Utter Pradesh) a chronically foodgrain deficit region in northern India. In one set, they have aggregate time-series data at district level and, in the other, they have obtained data from a survey of five villages selected from 170 villages around Padrauna town in Deoria.

Alive Still

2019 ◽  
Author(s):  
Cathy Curtis
Keyword(s):  
New York ◽  
Modern Art ◽  
Severe Form ◽  
The Other ◽  
Left Hand ◽  
Right Hand ◽  
The 1950S ◽  
Village Voice

In 1942, at age twenty, after a vision-impaired and rebellious childhood in Richmond, Virginia, Nell Blaine decamped for New York. Operations had corrected her eyesight, and she was newly aware of modern art, so different from the literal style of her youthful drawings. In Manhattan, she met rising young artists and poets. Her life was hectic, with raucous parties in her loft, lovers of both sexes, and freelance design jobs, including a stint at the Village Voice. Initially drawn to the rigorous formalism of Piet Mondrian, she received critical praise for her jazzy abstractions. During the 1950s, she began to paint interiors and landscapes. By 1959, when the Whitney Museum purchased one of her paintings, her career was firmly established. That year, she contracted a severe form of polio on a trip to Greece; suddenly, she was a paraplegic. Undaunted, she taught herself to paint in oil with her left hand, reserving her right hand for watercolors. In her postpolio work, she achieved a freer style, expressive of the joy she found in flowers and landscapes. Living half the year in Gloucester, Massachusetts, and the other half in New York, she took special delight in painting the views from her windows and from her country garden. Critics found her new style irresistible, and she had a loyal circle of collectors; still, she struggled to earn enough money to pay the aides who made her life possible. At her side for her final twenty-nine years was her lover, painter Carolyn Harris.

The Turn of the Screw and Other Stories

2008 ◽  
Author(s):  
Henry James
Keyword(s):  
New York ◽  
The Other ◽  
Victorian Culture ◽  
Ghost Story ◽  
Country House ◽  
Small Children ◽  
New York Edition

A young, inexperienced governess is charged with the care of Miles and Flora, two small children abandoned by their uncle at his grand country house. She sees the figure of an unknown man on the tower and his face at the window. It is Peter Quint, the master's dissolute valet, and he has come for little Miles. But Peter Quint is dead. Like the other tales collected here – ‘Sir Edmund Orme’, ‘Owen Wingrave’, and ‘The Friends of the Friends’ – ‘The Turn of the Screw’ is to all immediate appearances a ghost story. But are the appearances what they seem? Is what appears to the governess a ghost or a hallucination? Who else sees what she sees? The reader may wonder whether the children are victims of corruption from beyond the grave, or victims of the governess's ‘infernal imagination’, which torments but also entrals her? ‘The Turn of the Screw’ is probably the most famous, certainly the most eerily equivocal, of all ghostly tales. Is it a subtle, self-conscious exploration of the haunted house of Victorian culture, filled with echoes of sexual and social unease? Or is it simply, ‘the most hopelessly evil story that we have ever read’? The texts are those of the New York Edition, with a new Introduction and Notes.

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