VERNAL MIGRATION OF THE MONARCH BUTTERFLY (DANAUS P. PLEXIPPUS, LEPIDOPTERA: DANAIDAE) IN NORTH AMERICA FROM THE OVERWINTERING SITE IN THE NEO-VOLCANIC PLATEAU OF MEXICO

1979 ◽  
Vol 111 (1) ◽  
pp. 15-18 ◽  
Author(s):  
F. A. Urquhart ◽  
N. R. Urquhart
Keyword(s):  
North America ◽  
Monarch Butterfly ◽  
Migration Routes ◽  
Breeding Area ◽  
Eastern Population ◽  
Breeding Grounds ◽  
Overwintering Site ◽  
Do So

AbstractThe vernal migration routes of the eastern population of the monarch butterfly (Danaus p. plexippus L.) in North America were plotted from data resulting from the recapture of migrants alar tagged in the overwintering site of the Neo-volcanic Plateau of Mexico. One migrant, which had been alar tagged at Decorah, Iowa, on 3 September 1973, and recaptured 7 months later on 8 April 1974 at Richmond, Texas, led to the conclusion that this particular migrant had flown to the Mexican overwintering site and was recaptured on its return vernal flight. This recapture also gave data indicating that it was not returning to the original breeding area, from which it is concluded that although some migrants may return to the original breeding grounds many may not do so.

Autumnal migration routes of the eastern population of the monarch butterfly (Danaus p. plexippus L.; Danaidae; Lepidoptera) in North America to the overwintering site in the Neovolcanic Plateau of Mexico

1978 ◽  
Vol 56 (8) ◽  
pp. 1759-1764 ◽  
Author(s):  
F. A. Urquhart ◽  
N. R. Urquhart
Keyword(s):  
North America ◽  
Central America ◽  
Great Plains ◽  
Monarch Butterfly ◽  
Migration Routes ◽  
Monarch Butterflies ◽  
Eastern Population ◽  
Extensive Field ◽  
Overwintering Site

Based upon numerous recaptures of alar-tagged migrating monarch butterflies, together with extensive field expeditions through various parts of North and Central America, the migrating routes of monarchs have been plotted with considerable accuracy.Five overwintering areas have been defined representing 13 loci of concentrations, in the Neovolcanic Plateau of Mexico.It appears that migrants from the breeding areas of the Great Plains region overwinter in the western mountains of Mexico and those from breeding areas east of the Great Plains region overwinter in the eastern mountains. The greatest concentration occurs in the central mountains and represents migrations from parts of the Great Plains regions and parts of the eastern regions.

scholarly journals Discovery of breeding grounds of a Siberian Crane Grus leucogeranus flock that winters in Iran, via satellite telemetry

2002 ◽  
Vol 12 (4) ◽  
pp. 327-333 ◽  
Author(s):  
Yutaka Kanai ◽  
Meenakshi Nagendran ◽  
Mutsuyuki Ueta ◽  
Yuri Markin ◽  
Juhani Rinne ◽  
...  
Keyword(s):  
Satellite Telemetry ◽  
Migration Routes ◽  
Breeding Area ◽  
Volga River ◽  
Western Population ◽  
Siberian Crane ◽  
Grus Leucogeranus ◽  
Volga River Delta ◽  
Breeding Grounds ◽  
Conservation Plan

Siberian Crane Grus leucogeranus occurs only in Asia, and is Critically Endangered. The western population of the species has been almost extirpated, wintering at just two known sites, in Iran and India. To help conserve species that migrate long distances it is essential to have a comprehensive conservation plan that includes identification of migration routes and key resting areas. One Siberian Crane was satellite-tracked from the south Caspian Sea to its breeding grounds in Russia during the spring of 1996. The crane began migration on 6 March, and completed its migration on 1 May. This destination was formerly unknown as a breeding area for the species. During migration, the crane rested primarily at the eastern end of the Volga River delta. This suggests that the delta may be an important resting site for Siberian Crane.

ABERRANT AUTUMNAL MIGRATION OF THE EASTERN POPULATION OF THE MONARCH BUTTERFLY, DANAUS P. PLEXIPPUS (LEPIDOPTERA: DANAIDAE) AS IT RELATES TO THE OCCURRENCE OF STRONG WESTERLY WINDS

1979 ◽  
Vol 111 (11) ◽  
pp. 1281-1286 ◽  
Author(s):  
F. A. Urquhart ◽  
N. R. Urquhart
Keyword(s):  
First Generation ◽  
Atlantic Coast ◽  
Monarch Butterfly ◽  
Greater Antilles ◽  
Eastern Population ◽  
Westerly Winds ◽  
Migratory Routes ◽  
The Caribbean ◽  
Pass Through ◽  
Overwintering Site

AbstractStrong westerly winds occurring during autumnal migration of the eastern population of the monarch butterfly in North America, affect those butterflies migrating from areas east of long. 90°. The following aberrant migratory routes are presented: (1) Migrants moving down the Atlantic coast pass through the Florida peninsula to western Cuba thence to the overwintering site in Guatemala and Honduras; (2) migrants forced over the Atlantic ocean eventually reach the Bahama islands and thence to Yucatan, or Honduras via Jamaica and other islands of the Caribbean Sea, to the overwintering site in Guatemala and Honduras; (3) migrants arriving in the eastern islands of the Greater Antilles may eventually arrive in the Cordilleran mountains of Columbia and northwestern Venezuela; (4) migrants from the Lesser Antilles may return, along with members of a first generation, in the spring without establishing an overwintering site—the fate of these few occasional spring migrants is unknown.

OVERWINTERING AREAS AND MIGRATORY ROUTES OF THE MONARCH BUTTERFLY (DANAUS P. PLEXIPPUS, LEPIDOPTERA: DANAIDAE) IN NORTH AMERICA, WITH SPECIAL REFERENCE TO THE WESTERN POPULATION

1977 ◽  
Vol 109 (12) ◽  
pp. 1583-1589 ◽  
Author(s):  
F. A. Urquhart ◽  
N. R. Urquhart
Keyword(s):  
North America ◽  
Special Reference ◽  
Monarch Butterfly ◽  
The Other ◽  
Migration Routes ◽  
Western Population ◽  
Sierra Madre ◽  
Migratory Routes ◽  
First Time

AbstractAs a result of alar tagging migrating specimens of the monarch butterfly (Danaus p. plexippus L.) in North America over a period of 25 years, it was possible to plot the migration routes establishing two large overwintering colonies, one located in California and the other in mountains of the Sierra Madré Occidentale in Mexico. Photographs of the two overwintering populations are presented together with release–recapture lines showing the direction of migration from breeding areas to the two overwintering sites. Data, presented for the first time, show the migration routes of the Western population from the breeding areas in the mountains and west of the mountains to California.

The Shari’a Approach to Contemporary Problems of Mass Surveillance

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sattam Eid Almutairi
Keyword(s):  
North America ◽  
Personal Data ◽  
Legal Systems ◽  
Legal Norms ◽  
Muslim Countries ◽  
Norms And Values ◽  
The World ◽  
State Surveillance ◽  
Mass Surveillance ◽  
Do So

AbstractThe phenomenon of mass surveillance has confronted legal systems throughout the world with significant challenges to their fundamental norms and values. These dilemmas have been most extensively studied and discussed in relation to the kind of privacy cultures that exist in Europe and North America. Although mass surveillance creates the same kinds of challenges in Muslim countries, the phenomenon has rarely been discussed from the perspective of Shari’a. This article seeks to demonstrate that this neglect of mass surveillance and other similar phenomena by Shari’a scholars is unjustified. Firstly, the article will address objections that Shari’a does not contain legal norms that are relevant to the modern practice of state surveillance and that, if these exist, they are not binding on rulers and will also seek to show that, whatever terminology is employed, significant aspects of the protection of privacy and personal data that exists in other legal systems is also be found deeply-rooted in Shari’a. Secondly, it will assess the specific requirements that it makes in relation to such intrusion on private spaces and private conduct and how far it can benefit from an exception to the general prohibition on spying. Finally, it is concluded that mass surveillance is unlikely to meet these Shari’a requirements and that only targeted surveillance can generally do so.

scholarly journals Tracking multi-generational colonization of the breeding grounds by monarch butterflies in eastern North America

2013 ◽  
Vol 280 (1768) ◽  
pp. 20131087 ◽  
Author(s):  
D. T. Tyler Flockhart ◽  
Leonard I. Wassenaar ◽  
Tara G. Martin ◽  
Keith A. Hobson ◽  
Michael B. Wunder ◽  
...  
Keyword(s):  
North America ◽  
Danaus Plexippus ◽  
Late Summer ◽  
Breeding Habitat ◽  
Eastern North America ◽  
Distribution Models ◽  
Monarch Butterflies ◽  
Breeding Distribution ◽  
Breeding Grounds ◽  
Isotope Measurements

Insect migration may involve movements over multiple breeding generations at continental scales, resulting in formidable challenges to their conservation and management. Using distribution models generated from citizen scientist occurrence data and stable-carbon and -hydrogen isotope measurements, we tracked multi-generational colonization of the breeding grounds of monarch butterflies ( Danaus plexippus ) in eastern North America. We found that monarch breeding occurrence was best modelled with geographical and climatic variables resulting in an annual breeding distribution of greater than 12 million km 2 that encompassed 99% occurrence probability. Combining occurrence models with stable isotope measurements to estimate natal origin, we show that butterflies which overwintered in Mexico came from a wide breeding distribution, including southern portions of the range. There was a clear northward progression of monarchs over successive generations from May until August when reproductive butterflies began to change direction and moved south. Fifth-generation individuals breeding in Texas in the late summer/autumn tended to originate from northern breeding areas rather than regions further south. Although the Midwest was the most productive area during the breeding season, monarchs that re-colonized the Midwest were produced largely in Texas, suggesting that conserving breeding habitat in the Midwest alone is insufficient to ensure long-term persistence of the monarch butterfly population in eastern North America.

Late Quaternary paleoenvironments of Northwestern North America: implications for inland versus coastal migration routes

2001 ◽  
Vol 20 (1-3) ◽  
pp. 301-314 ◽  
Author(s):  
Carole A.S Mandryk ◽  
Heiner Josenhans ◽  
Daryl W Fedje ◽  
Rolf W Mathewes
Keyword(s):  
North America ◽  
Late Quaternary ◽  
Migration Routes ◽  
Northwestern North America

International evidence of changing assurance practices for carbon emissions disclosures

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rina Datt ◽  
Pranil Prasad ◽  
Connie Vitale ◽  
Krishan Prasad
Keyword(s):  
South Africa ◽  
North America ◽  
Carbon Emissions ◽  
Design Methodology ◽  
Service Providers ◽  
Content Type ◽  
International Evidence ◽  
The Uk ◽  
Intensive Growth ◽  
Do So

Purpose The market for the assurance of carbon emissions disclosures is showing intensive growth. However, due to the largely voluntary nature of carbon reporting and assurance, there are currently no clear standards or guidelines and little is known about it. The purpose of this paper is to examine the reporting and assurance practices for carbon emissions disclosures. Design/methodology/approach This study provides evidence on this market, with a sample that includes 13,419 firm-year observations across 58 countries between 2010 and 2017 from the Carbon Disclosure Project (CDP) database. Findings The results show that the demand for carbon emissions reporting comes mainly from North America, the UK and Japan. Recently, markets such as South Africa have also shown increased demand for carbon reporting. The data also shows that more firms are seeking assurance for their carbon emissions reports. Legitimacy, stakeholder and institutional theories are used to explain the findings of this study. Research limitations/implications The results have important implications for firms that produce carbon emissions disclosures, assurance service providers, legislators, regulators and the users of the reports and there should be more specific disclosure guidelines for level and scope of reporting. Originality/value Amongst the firms that do provide assurance on their carbon emissions reports, a majority do so using specialist assurance providers, with only limited assurance being provided. The results further show that a myriad of assurance frameworks is being used to assure the carbon emissions disclosures.

scholarly journals Factors influencing fall departure phenology in migratory birds that bred in northeastern North America

The Auk ◽  
2019 ◽  
Author(s):  
Émile Brisson-Curadeau ◽  
Kyle H Elliott ◽  
Pascal Côté
Keyword(s):  
North America ◽  
Short Distance ◽  
Migratory Birds ◽  
Breeding Habitat ◽  
Temperature Changes ◽  
Migration Timing ◽  
Warm Weather ◽  
Breeding Grounds ◽  
Timing Of Migration ◽  
Migrating Birds

Abstract The phenology of migrating birds is shifting with climate change. For instance, short-distance migrants wintering in temperate regions tend to delay their migration in fall during spells of warmer temperature. However, some species do not show strong shifts, and the factors determining which species will react to temperature changes by delaying their migration are poorly known. In addition, it is not known whether a slower migration or a postponed departure creates the observed delays in fall migration because most studies occur far south of the boreal breeding areas making it difficult to separate those 2 mechanisms. We used 22 yr of data at a northern observatory in eastern North America, at the southern edge of the boreal forest, to examine how 21 short-distance migrants responded to changing temperatures. We investigated if those species responding to temperature share life-history features (i.e. diet, size, total migration distance, breeding habitat, timing of migration). The period of migration in each species was, by far, the most important factor predicting the response of a species to temperature. Eight of the 13 species migrating in October changed their migration onset with temperature (usually by delaying migration by 1–2 days/°C), while the migration timing of none of the 8 species migrating in September was dependent on temperature. Furthermore, the absence of a greater migration delay by birds breeding farther from the study site (i.e. Arctic-breeding birds) suggests the mechanism is a postponed departure rather than a slower migration. We conclude that temperature variations in late fall influence the conditions on the breeding grounds, so that birds still present at that time benefit more from postponing their departure in warm weather.

scholarly journals Migratory Connectivity in Bicknell's Thrush: Locating Missing Populations With Hydrogen Isotopes

The Condor ◽  
2004 ◽  
Vol 106 (4) ◽  
pp. 905-909 ◽  
Author(s):  
Keith A. Hobson ◽  
Yves Aubry ◽  
Leonard I. Wassenaar
Keyword(s):  
North America ◽  
Dominican Republic ◽  
Migratory Birds ◽  
Geographical Information ◽  
Source Population ◽  
Catharus Bicknelli ◽  
Breeding Grounds ◽  
Early Fall ◽  
Bicknell's Thrush ◽  
Two Populations

Abstract The measurement of the abundance of naturally occurring deuterium (δD) in feathers grown in North America can provide geographical information on location where the feather was grown. Previously, we used this technique to link populations of Bicknell's Thrush (Catharus bicknelli) breeding in northeastern North America (to 46°N) with wintering grounds in the Dominican Republic. That study indicated the presence of a subpopulation of wintering birds with more depleted feather δD values than those measured on their known breeding grounds. This suggested either a more northerly or a higher altitude breeding source population than previously measured. We located two populations of Bicknell's Thrush in Quebec, Canada, at Mine Madeleine (49°N) and at Mont Gosford (45°N). The Mine Madeleine birds had feather δD values overlapping those of the unidentified subpopulation found wintering in the Dominican Republic. At Mont Gosford, hatch-year birds were more depleted in their feather δD values than after-second-year birds suggesting their more northerly origins and capture during the early fall migration period. Our study demonstrates how the stable-isotope approach can be used to document connectivity between breeding and wintering populations of migratory birds. Conectividad Migratoria en Catharus bicknelli: Localización de Poblaciones Perdidas con Isótopos de Hidrógeno Resumen. La medición de la abundancia de deuterio en estado natural (δD) en las plumas formadas en América del Norte puede brindar información geográ fica sobre la localización en donde se formó la pluma. Anteriormente usamos esta técnica para relacionar las poblaciones de Catharus bicknelli que se reproducen en el noreste de América del Norte (hasta 46°N) con las áreas de invernada en República Dominicana. Ese estudio indicó la presencia de una subpoblación de aves invernantes con valores de δD en las plumas por debajo de los valores medidos de los sitios conocidos de cría. Esto sugirió la presencia de una población reproductiva proveedora de individuos localizada más al norte o a mayor elevación que las registradas anteriormente. Localizamos dos poblaciones de C. bicknelli en Québec, Canadá, una en Mine Madeleine (49°N) y otra en Mont Gosford (45°N). Las aves de Mine Madeleine tuvieron valores de δD en las plumas que se superpusieron con aquellos de la subpoblación no identificada encontrada invernando en República Dominicana. En Mont Gosford, las aves del primer año de edad presentaron valores más bajos de δD en las plumas que aquellos encontrados en aves del segundo año de edad o mayores, sugiriendo un origen más boreal y que fueron capturadas durante el inicio del período de migración otoñal. Nuestro estudio demuestra como el mé todo de isótopos estables puede ser usado para documentar conectividad entre poblaciones reproductivas e invernales de aves migratorias.

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