A Female Ceratioid Angler, Cryptopsaras couesi Gill, from the Gulf of Mexico, Bearing Three Parasitic Males

Shoemaker, Hurst H.

doi:10.2307/1440560

Cited by 6 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Subsequent work by Regan and Trewavas (1932, see Fig. 6), Bertelsen (1951), Shoemaker (1958), Pietsch (1976), Munk and Bertelsen (1983), and Munk (2000) fully substantiated the earlier findings. "In the neighborhood of the fusion area the skin of the female is rendered spongy by the development of a system of thin-walled irregular intercommunicating blood-sinuses, which are continuous with similar sinuses in the skin and underlying tissues of the snout and jaws of the male" (Regan and Trewavas, 1932: 15).…”

Section: Historical Perspectivementioning

confidence: 68%

“…Histological examination of the testes of two of these specimens (UW 21774, UW 21775; 20 and 34 mm, respectively), showed evidence of resorption, thus indicating a recent spawning event. All known gravid females (Bertelsen, 1943(Bertelsen, , 1951Fast, 1957;Shoemaker, 1958;Mead et al, 1964;Fitch, 1973) have a parasitic male attached. These data taken from both males and females reaffirm the idea that sexual maturity is never attained in members of this family unless stimulated by the attachment of a male.…”

Section: Family Accountsmentioning

confidence: 99%

See 1 more Smart Citation

Dimorphism, parasitism, and sex revisited: modes of reproduction among deep-sea ceratioid anglerfishes (Teleostei: Lophiiformes)

Pietsch

2005

Ichthyol Res

120

View full text Add to dashboard Cite

Sexual parasitism, a remarkable mode of reproduction unique to some members of the deep-sea anglerfish suborder Ceratioidei, in which males are dwarfed and become permanently attached to much larger females, is described in a number of previously unreported specimens and taxa. Although generally attributed to all ceratioids, and despite more than a sevenfold increase in the number of known parasitized females in collections throughout the world in the past 50 years, the phenomenon is surprisingly confined to few taxa within the suborder. To date, permanently attached males have been found in only 5 of the 11 ceratioid families, 10 of the 35 genera, and 23 of the 160 recognized species. Notes on taxonomic content, available material, occurrence of sexual parasitism, gravid females and ripe males, the development of eyes and nostrils of the males, the ability of males to capture and ingest food independently of the female, occurrences of multiple attachments of males to a single female, and the nature of the fusion between coupled males and females are given for each ceratioid family. This information is then summarized and discussed. Evidence is presented to reaffirm the presence of three reproductive modes: obligatory parasitism, facultative parasitism, and temporary nonparasitic attachment. Additional evidence is provided to reaffirm the hypothesis that sexual parasitism has evolved separately at least three and perhaps five or more times within the suborder.

show abstract

Section: Historical Perspectivementioning

confidence: 68%

Section: Family Accountsmentioning

confidence: 99%

Dimorphism, parasitism, and sex revisited: modes of reproduction among deep-sea ceratioid anglerfishes (Teleostei: Lophiiformes)

Pietsch

2005

Ichthyol Res

120

View full text Add to dashboard Cite

show abstract

“…The campus was a mecca for visiting scientists, some receiving National Science Foundation grants through the GCRL (Shoemaker, 1958). Some employed all means they felt necessary to pursue their goal.…”

Section: The Gunter Eramentioning

confidence: 99%

History of the Gulf Coast Research Laboratory

Shaw

2010

goms

View full text Add to dashboard Cite

N atural and man-made beaches, productive marshes, protective barrier islands, abundant commercial and recreational fisheries, bays, bayous, and estuaries-these are the many rich and beautiful elements comprising the fertile, golden crescent that crowns the northern Gulf of Mexico and is the home of the Gulf Coast Research Laboratory (GCRL). Located in Ocean Springs, MS, about 60 miles west of Mobile, AL, and 90 miles east of New Orleans, LA, GCRL has two campuses-its original site of ,40 acres purchased in 1949 at the junction of Halstead Road and East Beach Drive, and Cedar Point, a 224-acre site acquired in 1995 on Gollott Road adjacent to Gulf Islands National Seashore. Each campus has its distinct function in the research, teaching, and service activities of GCRL. A third campus at Point Cadet in Biloxi, MS, the J. L. Scott Aquarium and Marine Education Center, was destroyed by Hurricane Katrina's (August 29, 2005) massive 26+-foot storm surge. The GCRL conducts scientific studies; supports the research needs of local, state, regional, and federal agencies charged with managing and conserving the natural resources of the area; and provides quality educational experiences for students, teachers, and citizens (Fig. 1). EARLY EFFORTS AND VISIONARIES Although the anniversary of the GCRL is acknowledged as August 29, 1947, and dates to the first official summer session held at Magnolia State Park (now Gulf Islands National Seashore), the efforts and commitment of several members of the Mississippi Academy of Sciences (MAS) to establish a research and teaching laboratory devoted to the study of the marine and coastal environments of Mississippi began nearly 20 yr earlier. These early promoters and educators sprinkled among several state colleges had begun bringing students to the coast, typically during spring breaks or following the regular annual meetings of the Academy, from the 1920s though the 1940s. According to the summer 1949 Bulletin of the Gulf Coast Research Laboratory, ''The earliest attempts to establish a Laboratory on the Gulf Coast, according to Dr.

show abstract

Über die Auswahl von Polymerisationsreaktoren

Gerrens

1980

Chemie Ingenieur Technik

View full text Add to dashboard Cite

Bei technischen Synthesen von Polymeren entsteht immer ein sehr komplexes Produkt, zu dessen ausreichender Charakterisierung neben chemischen und physikalischen Parametern oft auch noch anwendungstechnische Tests erforderlich sind. Im Gegensatz zur Synthese niedermolekularer Stoffe sind nachtragliche Korrekturen, z. B. durch Destillation oder Kristallisation, meist unmoglich. Der sehr genau gezielten Reaktionsfiuhrung kommt besondere Bedeutung zu. Polyreaktionen lassen sich nach kinetischen Gesichtspunkten (Monomerenverkniipfung mit und ohne Abbruchsreaktion, Polymerenverkniipfung) unterscheiden. Neben der homogenen Losungspolymerisation gibt es die heterogenen Verfahren der Fallungs-, Perl-und Emulsionspolymerisation. Die Polymerisationsreaktoren konnen den bekannten Idealtypen (Batch-Reaktor, kontinuierlicher KolbenfluD-Reaktor, Riihrkesselkaskade und kontinuierlicher Riihrkessel-Reaktor) zugeordnet werden. Bei Losungspolymerisationen erschwert hohe Viskositat oft die vollstandige Durchmischung, es ist auf Segregation zu achten. Die Arbeit gibt einen Uberblick dariiber, welche Ausfuhrungsformen der Reaktortypen fur die verschiedenen Polyreaktionen und Polymerisationsverfahren in der Technik verwendet werden und untersucht die Grunde fur die Auswahl. Am vielseitigsten eingesetzt wird der Batch-Reaktor, gefolgt von der Kaskade. Bei kontinuierlich durchgefiuhrter Polymerenverkniipfung (Polykondensation, Polyaddition) werden haufig mehrere Reaktoren verschiedener Ausfiuhrungsart hintereinandergeschaltet.Choice of polymerization reactors. Industrial syntheses of polymers always yield a highly complex product whose adequate characterization often requires application-oriented tests in addition to chemical and physical parameters. In contrast to the synthesis of low-molecular mass substances subsequent corrections, e. g. by distillation or crystallization, are usually impossible. Extremely detailed reaction control is of paramount importance. Polyreactions can be classified according to kinetic aspects (monomer linkage with and without termination reaction, linkage of polymers). Apart from homogeneous bulk polymerization, there are the heterogeneous processes of precipitation-, bead-, and emulsion-polymerization. The polymerization reactors can be assigned to the known ideal types (batch reactor, continuous plug flow reactor, series of stirred tanks, and continuous stirred tank reactor). High viscosity often thwarts thorough mixing in bulk polymerization and segregation may occur. The article surveys the variants of the reactor types used for various polyreactions and polymerization processes in industry and examines the reasons for this choice. Most commonly used is the batch reactor, followed by the cascade of stirred tanks. Continuous polymer-linkage (polycondensation, polyaddition) is frequently performed in a series of several different kinds of reactors.

show abstract

A Female Ceratioid Angler, Cryptopsaras couesi Gill, from the Gulf of Mexico, Bearing Three Parasitic Males

Cited by 6 publications

References 0 publications

Dimorphism, parasitism, and sex revisited: modes of reproduction among deep-sea ceratioid anglerfishes (Teleostei: Lophiiformes)

Dimorphism, parasitism, and sex revisited: modes of reproduction among deep-sea ceratioid anglerfishes (Teleostei: Lophiiformes)

History of the Gulf Coast Research Laboratory

Über die Auswahl von Polymerisationsreaktoren

Contact Info

Product

Resources

About