EXPERIMENTAL INFECTIONS OF CYCLOPID COPEPODS WITH TRIAENOPHORUS CRASSUS FOREL AND T. NODULOSUS (PALLAS)

1960 ◽  
Vol 38 (2) ◽  
pp. 345-356 ◽  
Author(s):  
N. H. F. Watson ◽  
J. L. Price
Keyword(s):  
Infection Rate ◽  
North American ◽  
Feeding Habits ◽  
The Other ◽  
Experimental Infections ◽  
Carnivorous Species ◽  
Important Host ◽  
Herbivorous Species ◽  
Cyclops Scutifer

Coracidia of both Triaenophorus crassus and T. nodulosus were fed to 19 species of cyclopid copepods, and coracidia of one or the other were fed to 4 other species. Procercoids of both species of parasite developed in nine species of cyclopids. Three species were infected with T. crassus only and four with T. nodulosus only. Size or feeding habits of the specimens did not influence the ingestion of coracidia. The presence of non-feeding individuals may have influenced the infection rate of some species. Herbivorous species, carnivorous species, and species which did not become infected ate large quantities of coracidia.Microcyclops varicans rubellus was the most easily infected cyclopid species in the experiments. It is probably an important host of Triaenophorus in North American lakes along with Cyclops bicuspidatus thomasi, Cyclops brevispinosus, and, in certain areas, Cyclops scutifer.

Digestive organ morphology, diet, and guild structure of North American Anatidae

1987 ◽  
Vol 65 (7) ◽  
pp. 1812-1817 ◽  
Author(s):  
Gregory G. Barnes ◽  
Vernon G. Thomas
Keyword(s):  
North American ◽  
Food Habits ◽  
Feeding Habits ◽  
Feeding Guilds ◽  
Canada Geese ◽  
Guild Structure ◽  
Diet Diversity ◽  
Branta Bernicla ◽  
Carnivorous Species ◽  
Clangula Hyemalis

Discriminant function, cluster, and covariate analyses of gizzard, small intestine, and ceca weights were used to quantify the structure of feeding guilds and the effects of diet on gut morphology for 18 species of North American anatids. Guild structure based on gut measurements closely approximated that identified by generalized feeding habits. Herbivorous species such as Brant (Branta bernicla), Gadwall (Anas strepera), Redheads (Aythya americana), Canada Geese (Branta canadensis), and Mallards (Anas platyrhynchos) consistently had heavier gizzards and ceca than carnivorous species such as Common Goldeneye (Bucephala clangula), Bufflehead (Bucephala albeola), Oldsquaw (Clangula hyemalis), and Common Mergansers (Mergus merganser). Omnivorous species such as Lesser Scaup (Aythya afftnis), Greater Scaup (Aythya marila), and American Black Ducks (Anas rubripes) were characterized by heavy gizzards, intermediate ceca, and heavy intestines. The results provide further evidence that intestine size is primarily influenced by overall diet diversity and suggest that gut size may be used to indicate general food habits. The ability of waterfowl to adjust gut sizes and accommodate dietary changes is restricted to ranges dictated by the most frequently eaten foods. Thus, predictions of general food habits can be made without knowledge of the foods being consumed at a particular time and location.

scholarly journals A comparative study of the proventricular structure in twenty Chinese Tettigoniidae (Orthoptera) species

2012 ◽  
Vol 23 (3) ◽  
Author(s):  
Yinliang Wang ◽  
Yuetian Su ◽  
Xue Zhang ◽  
Na Li ◽  
Bingzhong Ren
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Comparative Study ◽  
Alimentary Canal ◽  
Feeding Habits ◽  
Future Studies ◽  
Carnivorous Species ◽  
Herbivorous Species ◽  
Scanning Electron

This study focuses on the proventriculus and the alimentary canal of twenty Tettigoniidae species among three subfamilies, Tettigoniinae, Phaneropterinae and Conocephalinae. Each part of the alimentary canal and the inner structure of proventriculus were examined under optic microscope and scanning electron microscopy. As a result, the length of each part of the alimentary canal and the inner structure of proventriculus were highly associated with feeding habits. Carnivorous species always had a short foregut and long cilia on the base of the sclerotized appendix in proventriculus, whereas herbivorous species always had a longer foregut and a highly sclerotized proventriculus. These results increase understanding of the alimentary canal in Tettigoniidae and will be useful in future studies of their feeding habits.

scholarly journals Eurasian and North American phylogeny of Turolian hipparionine horses (Perissodactyla, Mammalia) in China

1992 ◽  
Vol 6 ◽  
pp. 305-305
Author(s):  
Mahito Watabe
Keyword(s):  
North America ◽  
North American ◽  
Northern China ◽  
Sensu Stricto ◽  
The Other ◽  
Dental Morphology ◽  
Facial Morphology ◽  
Open Land ◽  
Specialized Form ◽  
Eastern Half

The late Miocene Chinese hipparions are morphologically diversified showing similarity to both western Old World's and North American forms. Two Chinese taxa that are phylogenetically related to western Old World's forms are Hipparion fossatum (= H. forstende) from Baode (Shanxi) and H. hippidiodus from Qingyang (Gansu) and Baode. The former is related to H. mediterraneum and the latter to H. urmiense - platygenys from the Turolian localities in the western Old World. H. fossatum and H. hippidiodus are associated with the “dorcadoides” (open-land) and “mixed” faunas in northern China. Hipparion fossatum that is characterized by POF located close to the orbit co-occurs with large and morphologically specialized form, H. dermatorhinum in Baode (Loc.30). H. hippidiodus with reduced POF is discovered with smaller H. coelophyes in Loc. 43, 44 (Baode) and Loc. 115 (Gansu).The hipparions associated with the “gaudryi” (forest) fauna are characterized by well defined and small POF located far from the orbit. Those forms are: H. platyodus from Loc. 70; H. ptychodus from Loc. 73; H. tylodus from Hsi-Liang in Yushe - Wuxiang basins; and H. sefvei from Loc. 12 at Xin-an in Henan province. H. coelophyes from Baode (Loc.43 & 44) and Qingyang (Loc. 115) also show similar facial morphology to the these forms, although it has small size and shallow POF. Those forms are similar in facial and dental morphology to Hipparion sensu stricto and some species of Cormohipparion in North America.The assemblages of Chinese hipparions are composed of two groups whose members are phylogenetically similar to the forms from both western part of Eurasia and North America. The “gaudryi” fauna is considered younger than the other two on the basis of faunal analyses. The similarity in hipparionine taxonomy between northern China and North America in the latest Miocene is an evidences for possible faunal interchange(s) occurred during that period, as suggested by taxonomic analyses on carnivores and proboscideans in eastern half of Eurasia and North America.

Tunes That Bind: Paul J. Seelig, Eva Gauthier, Charles T. Griffes, and the Javanese Other

2009 ◽  
Vol 3 (2) ◽  
pp. 129-154
Author(s):  
HENRY SPILLER
Keyword(s):  
Identity Formation ◽  
North American ◽  
Raw Materials ◽  
Sense Of Self ◽  
The Other ◽  
Edward Said ◽  
Complex Relationship ◽  
East Indies ◽  
Dutch East Indies

AbstractThe powerful concept of orientalism has undergone considerable refinement since Edward Said popularized the term with his eponymous book in 1978. Orientalism typically is presented as a totalizing process that creates polar oppositions between a dominating West and a subordinate East. U.S. orientalisms, however, reflect uniquely North American approaches to identity formation that include assimilating characteristics usually associated with the Other. This article explores the complex relationship among three individuals—U.S. composer Charles T. Griffes, Canadian singer Eva Gauthier, and German-trained Dutch East Indies composer Paul J. Seelig—and how they exploited the same Javanese songs to lend legitimacy to their individual artistic projects. A comparison of Griffes's and Seelig's settings of a West Javanese tune (“Kinanti”) provides an especially clear example of how contrasting approaches manifest different orientalisms. Whereas Griffes accompanied the melody with stock orientalist gestures to express his own fascination with the exotic, Seelig used chromatic harmonies and a chorale-like texture to ground the melody in the familiar, translating rather than representing its Otherness. The tunes that bind Griffes, Gauthier, and Seelig are only the raw materials from which they created their own unique orientalisms, each with its own sense of self and its own Javanese others.

scholarly journals Typology and nuance: relativization

2020 ◽  
pp. 104-130
Author(s):  
Marianne Mithun
Keyword(s):  
North American ◽  
Large Scale ◽  
Relative Clauses ◽  
Spontaneous Speech ◽  
The Other ◽  
Stages Of Development ◽  
Linguistic Typology ◽  
The North

Much of linguistic typology is inherently categorical. In large-scale typological surveys, grammatical constructions, distinctions, and even variables are typically classified as present, absent, or embodying one of a set of specified options. This work is valuable for a multitude of purposes, and in many cases such categorization is sufficient. In others, we can advance our understanding further if we take a more nuanced approach, considering the extent to which a particular construction, distinction, or variable is installed in the grammar. An important tool for this approach is the examination of unscripted speech in context, complete with prosody. This point is illustrated here with Mohawk, an Iroquoian language indigenous to the North American Northeast. As will be seen, the two types of construction which might be identified as relative clauses are emergent, one less integrated into the grammar than the other. Examination of spontaneous speech indicates that the earliest stages of development are prosodic, as speakers shape their messages according to their communicative purposes at each moment.

scholarly journals Trophic habits of the invasive crab Libinia dubia H. Milne Edwards, 1834 from the Gulf of Gabès (Tunisia)

2020 ◽  
Author(s):  
AMANI CHAFFAI ◽  
WAFA RJIBA-BAHRI ◽  
ASMA ABIDI ◽  
FRANҪOISE DENIS ◽  
JAMILA BEN SOUISSI
Keyword(s):  
Feeding Habits ◽  
Carapace Width ◽  
Stomach Contents ◽  
Spider Crab ◽  
Gulf Of Gabes ◽  
Chi Square ◽  
Gulf Of Gabès ◽  
Chi Square Test ◽  
Herbivorous Species ◽  
Stomach Weight

Feeding habits of the invasive spider crab Libinia dubia from the Mediterranean Sea were studied in the Gulf of Gabès (Tunisia) using the frequency of occurrence and points methods. The population was sampled at least monthly between November 2015 and October 2016. Stomach contents of 384 specimens were analysed. Results indicate that L. dubia is an herbivorous species exhibiting clear preferences for algae (ALG) and Magnoliophyta (MAG) (62.03%, 7.13 points and 59.36%, 5.3 points respectively) although Echinodermata (ECH), Porifera (POR), Cnidaria (CNI), Mollusca (MOL), Polychaeta (POL), Crustacea (CRU) and fish (FIS) were accidentally consumed along with Bryozoa (BRY), sediment (SED), and unidentifiable materials (UNM). The diversity of ALG ingested was studied in detail: Chlorophyceae were found in 87.93% of stomachs containing ALG and contributed most of points to the stomach contents (4.18 points) followed respectively by Phaeophyceae (81.03%, 2.27 points) and Rhodophyceae (40.95%, 0.68 points).Very low Vacuity Index was recorded (VI = 2.6%). Ingested items varied significantly with regard to the season (Chi-square test, χ2calculated = 87.86 > χ2theoretical = 7.81, df = 3, p < 0.05) and crab size (χ2calculated = 14.25 > χ2theoretical = 5.99, df = 2, p = 0.026). Insignificant differences were registered by studying Carapace Width-Stomach Weight (CW-SW) relationships (T-test, tcalculated < ttheoretical, p > 0.05). Kruskal-Wallis test was applied so that the composition of crab diet among groups could be compared (H = 1.1, df = 3, p = 0.77). 

ANTHOCYANIN, AGLYCONE AND AGLYCONE-SUGAR CONTENT OF FRUITS OF TEMPERATE NORTH AMERICAN SPECIES OF Gaylussacia (ERICACEAE)

1988 ◽  
Vol 68 (1) ◽  
pp. 247-253 ◽  
Author(s):  
J. R. BALLINGTON ◽  
W. E. BALLINGER ◽  
E. P. MANESS
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
North American ◽  
High Performance ◽  
Hplc Analysis ◽  
Sugar Content ◽  
North American Species ◽  
The Other ◽  
Phylogenetic Implications

HPLC analysis of the true huckleberry species Gaylussacia baccata, G. dumosa, G. frondosa, G. mosieri, and G. ursina identified the 3-monoarabinosides, 3-monogalactosides, and 3-monoglucosides of cyanidin, delphinidin, malvidin, peonidin, and petunidin. Gaylussacia brachycera contained all anthocyanins, except peonidin-3-arabinoside. Gaylussacia brachycera differed from other species in percent delphinidin-3-arabinoside. It was higher than the other species in percent of the aglycone delphinidin and lower in cyanidin, and also higher in percent of the sugar arabinose. There were no detectable differences among the other species for anthocyanins, aglycones, or aglycone-sugars. The phylogenetic implications of the similarities among species of Gaylussacia and Vaccinium in anthocyanins, aglycones, and aglycone-sugars of the fruit were discussed.Key words: High-performance liquid chromatography, huckleberries, blueberries, chemotaxonomy, taxonomy, biosystematics

Competences in US and Spain

2020 ◽  
pp. 302-337
Author(s):  
Bianca Vitalaru
Keyword(s):  
Communication Skills ◽  
21St Century ◽  
Teaching Strategies ◽  
North American ◽  
Oral Communication ◽  
The Other ◽  
American Education ◽  
Education Systems ◽  
English Speaking

This chapter analyzes teaching strategies that English-speaking Language Assistants (LAs) enrolled as students in the ‘Teach and Learn in Spain' Program at Instituto Franklin-Universidad de Alcalá, considering their curriculum designs developed as Master's Theses between 2014 and 2017. It is based on the assumption that they focus on the aspects they perceive as essential for developing Spanish students' oral communication skills in English in the context of their relationship with other types of skills that are specific for the 21st century in particular. Specifically, after describing the basic context for developing competences in the Spanish and North American education systems, the chapter analyzes several aspects: the teaching strategies their academic papers focus on, the proposal of guides and guidelines as a strategy to solve difficulties, and some of the other types of solutions they provide to motivate the students and improve specific skills.

Beyond the Cold War Chessboard

Worldview ◽  
1974 ◽  
Vol 17 (6) ◽  
pp. 21-22
Author(s):  
John W. Holmes
Keyword(s):  
United States ◽  
Cold War ◽  
North Atlantic ◽  
North American ◽  
The Other ◽  
The North ◽  
Common Interests ◽  
The North Atlantic ◽  
The Cold War

The problem in judging M. Servan-Schreiber's message is that he reaches some sound conclusions on the basis of dubious premises, from which he derives recommendations which could be disastrous.There may be some satisfaction in seeing a Frenchman concerned with le défi, russe instead of le défi américain, but his interpretation of one is as crude as was his interpretation of the other. The shock of revelation that there are common interests of the Atlantic countries in economic as well as strategic matters is understandably more startling to a Frenchman than to others. It was all set out in 1949 in Article 2 of the North Atlantic Treaty and was restated eloquently in 1973 by Mr. Kissinger. But last spring European leaders were included to see the latter as a self-interested plea from a weak United States to a prosperous Europe. The North American countries were reminded that their role in Europe was simply to defend it on request.

EUBRANCHIPUS INTRICATUS N.SP., A WIDELY DISTRIBUTED NORTH AMERICAN FAIRY-SHRIMP, WITH A NOTE ON ITS ECOLOGY

1967 ◽  
Vol 45 (5) ◽  
pp. 663-666 ◽  
Author(s):  
R. Hartland-Rowe
Keyword(s):  
North America ◽  
North American ◽  
Temporary Pools ◽  
The Other ◽  
Fairy Shrimp ◽  
Low Salinity

The name Chirocephalopsis bundyi (Forbes 1876) has been applied to two species. One of these is Eubranchipus bundyi (Forbes), of which Eubranchipus gelidus (Hay and Hay, 1889) is a synonym. The other, referred to by Brtek (1966) as E. gelidus (Hay and Hay), is described as E. intricatus n.sp. Both species are widely distributed in North America and occur in temporary pools of low salinity.

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