Notes on the Coleopterous Fauna of Guadalupe Island

1874 ◽  
Vol 5 ◽  
pp. 198
Author(s):  
George H. Horn
Keyword(s):  
Guadalupe Island

Trophic Variation Between the Two Existing Guadalupe Fur Seal Colonies on Guadalupe Island and the San Benito Archipelago, Mexico

2017 ◽  
Vol 43 (1) ◽  
pp. 14-25 ◽  
Author(s):  
María José Amador-Capitanachi ◽  
Xchel G. Moreno-Sánchez ◽  
Ariadna Juárez-Ruiz ◽  
Giulia Ferretto ◽  
Fernando R. Elorriaga-Verplancken
Keyword(s):  
Fur Seal ◽  
Guadalupe Island

scholarly journals The Brahea edulis palm forest in Guadalupe Island: A North American fog oasis?

2012 ◽  
Vol 85 (1) ◽  
pp. 137-145 ◽  
Author(s):  
PEDRO P GARCILLÁN ◽  
ERNESTO VEGA ◽  
CARLOS MARTORELL
Keyword(s):  
North American ◽  
Guadalupe Island

Variability in Island Populations of the House Finch

The Auk ◽  
1983 ◽  
Vol 100 (1) ◽  
pp. 180-187 ◽  
Author(s):  
Dennis M. Power
Keyword(s):  
Morphological Characters ◽  
Population Variation ◽  
Carpodacus Mexicanus ◽  
House Finch ◽  
Isolated Populations ◽  
Island Populations ◽  
Coefficients Of Variation ◽  
Variation Parameter ◽  
Guadalupe Island

Abstract Coefficients of variation and generalized variances are compared for nine morphological characters from five mainland and four island populations of the House Finch (Carpodacus mexicanus). The purpose is to test the idea that variability is reduced in isolated populations and that there is a "population variation parameter" that determines the level of variation in most characters. Variability is greater in bill characters for Guadalupe and San Benito Islands than for mainland and other island populations. There are no consistent differences among samples in variability of wing, tail, or hind-limb characters, except for a tendency toward increased tarsus-length variability in a southern Baja California population and reduced variability in this character in San Clemente Island and Guadalupe Island populations. In bill characters, increased variability is found in the most divergent populations. The results do not support the generalization that geographic (= genetic) isolation per se causes much of a change in variability in island populations of birds, nor is there support for the idea of a pervasive quality of the gene pool that determines the level of variability in most characters.

Pleurostomella concava: a new benthic foraminifer in Oligocene and Miocene sediments from the Pacific and Indian Oceans

1991 ◽  
Vol 65 (4) ◽  
pp. 595-601
Author(s):  
J. Otto R. Hermelin
Keyword(s):  
Baja California ◽  
Benthic Foraminifer ◽  
The Pacific ◽  
Guadalupe Island

The species Pleurostomella concava is a new benthic foraminifer recognized in Oligocene and Miocene sediments from the Indian and Pacific Oceans. The first mentioned finding of this species is in the material recovered from the experimental Mohole drilling near Guadalupe Island off Baja California. The morphology of Pleurostomella concava differs distinctively from other species of the genus Pleurostomella by its concave apertural face and keel-like rim around the ultimate chamber.

Unraveling the white shark observation tourism at Guadalupe Island, Mexico: Actors, needs and sustainability

Marine Policy ◽  
2020 ◽  
Vol 119 ◽  
pp. 104056 ◽  
Author(s):  
Mercedes I. Meza-Arce ◽  
Luis Malpica-Cruz ◽  
Mauricio E. Hoyos-Padilla ◽  
Francisco J. Mojica ◽  
María Concepción Arredondo-García ◽  
...  
Keyword(s):  
White Shark ◽  
Guadalupe Island

Guadalupe Island Cloud Trail

1994 ◽  
Vol 122 (1) ◽  
pp. 235-242 ◽  
Author(s):  
Clive E. Dorman
Keyword(s):  
Guadalupe Island

Improved Fourier terrain correction, Part I

Geophysics ◽  
1995 ◽  
Vol 60 (4) ◽  
pp. 1007-1017 ◽  
Author(s):  
Robert L. Parker
Keyword(s):  
Quadrature Rule ◽  
Observation Point ◽  
Terrain Correction ◽  
New Approach ◽  
Computational Speed ◽  
Marine Gravity ◽  
Numerical Effort ◽  
Local Contribution ◽  
Steep Terrain ◽  
Guadalupe Island

A description of a new Fourier technique is given for calculating the gravitational attraction of a layer with an irregular top surface for application in the terrain correction of marine gravity surveys in shallow water. An earlier Fourier‐based algorithm fails or becomes inaccurate when the peaks of the topography approach the sea surface too closely. The new approach divides the attraction into two parts: a local contribution from the material within a cylinder around each observation point and the attraction from the matter outside the cylinder. A special quadrature rule, optimized for the actual data distribution, evaluates the local contribution. The calculation of the exterior component represents the bulk of the numerical effort. Fortunately, the exterior integral possesses an expansion as a series of convolutions, and by evaluating these in the Fourier domain, the procedure can take advantage of the efficiency of the fast Fourier transform. Chebychev economization of the convolution series provides further significant improvements in computational speed. Two examples, one artificial and the other based on a survey around Guadalupe Island, illustrate the application of the new technique. Estimates of the errors from computation sources and from the inadequacies of the topographic model confirm the general accuracy of the approach, except in regions of very steep terrain.

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