Troglobitic Ostracoda (Myodocopa: Cypridinidae, Thaumatocyprididae) from Anchialine Pools on Santa Cruz Island, Galapagos Islands

1989 ◽  
pp. 1-38 ◽  
Author(s):  
Louis S. Kornicker ◽  
T. M. Iliffe
Keyword(s):  
Galapagos Islands ◽  
Galápagos Islands ◽  
Santa Cruz Island ◽  
Santa Cruz

scholarly journals Human-caused and natural mortality of giant tortoises in the Galapagos Islands during 1995-2004

Oryx ◽  
2007 ◽  
Vol 41 (3) ◽  
pp. 337-342 ◽  
Author(s):  
Cruz Márquez ◽  
David A. Wiedenfeld ◽  
Sandra Landázuri ◽  
Juan Chávez
Keyword(s):  
National Park ◽  
National Park Service ◽  
Charles Darwin ◽  
Galapagos Islands ◽  
Research Station ◽  
Natural Mortality ◽  
Galápagos Islands ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Park Service

AbstractAlthough the killing of giant tortoises in the Galapagos Islands has been prohibited since 1933, poaching of tortoises still occurs. Personnel of the Galapagos National Park Service and the Charles Darwin Research Station regularly survey populations of tortoises throughout the archipelago and report all dead tortoises found. For the 10-year period 1995–2004 the field personnel reported evidence of 190 giant tortoises killed, primarily on the southern portion of Isabela Island. For the first 6 years the number of tortoises found killed was <15 per year, but since 2001 the number killed has increased dramatically, with 49 tortoises poached in 2004. During the same 10 years the number of tortoises found dead from natural causes was 131. Many of these deaths can be attributed to events associated with the 1997–1998 El Niño or with outbreaks of disease on Santa Cruz Island in 1996 and 1999. The results indicate that poaching exceeds natural mortality, and is a significant factor affecting these long-lived and slow-reproducing animals. Environmental education efforts in the human population of southern Isabela appear to have had little effect. Because tortoise poaching takes place at a small number of sites, effective enforcement at those sites could reduce killing of tortoises.

Baseline data for identifying potentially invasive plants in Puerto Ayora, Santa Cruz Island, Galápagos

2008 ◽  
Vol 14 (2) ◽  
pp. 93 ◽  
Author(s):  
A. M. Guerrero ◽  
P. Pozo ◽  
S. Chamorro ◽  
A. Guezou ◽  
C. E. Buddenhagen
Keyword(s):  
Introduced Species ◽  
Plant Species ◽  
Invasive Plants ◽  
New Records ◽  
Galapagos Islands ◽  
Galápagos Islands ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Number Of Species ◽  
And Behavior

We recorded 502 introduced plant species during an inventory of all 2 334 private properties in Puerto Ayora, the largest town on Santa Cruz Island and the Galapagos Islands (population > 10,000) which accounts for about half of the Galapagos population. A third of these species were new records for the Galapagos Islands, 73% were found only in cultivation, 18% were naturalized and not cultivated (in Puerto Ayora), and 9% were found in cultivation and naturalized (escaped). Seventeen species previously known to occur only in cultivation in Galapagos are now considered escaped. A number of species known to be naturalized in the humid highlands of Santa Cruz do not appear to be able to reproduce in Puerto Ayora?s drier climate. To determine which introduced species should be a priority for control or eradication, the potential invasiveness of each species was assessed based on their distribution and behavior in Galapagos and elsewhere. At least 13 species were considered potentially serious invaders that could be feasible to eradicate.

The pholcid spiders of the Galápagos Islands, Ecuador (Araneae: Pholcidae)

1992 ◽  
Vol 70 (6) ◽  
pp. 1185-1199 ◽  
Author(s):  
Willis J. Gertsch ◽  
Stewart B. Peck
Keyword(s):  
New Species ◽  
Galapagos Islands ◽  
Santa Fe ◽  
Galápagos Islands ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
New Synonym ◽  
Stridulatory Apparatus ◽  
Parapatric Speciation ◽  
First Time

The 12 known species of the family Pholcidae in the Galápagos Islands are diagnosed, illustrated, and assigned to six genera as follows: Coryssocnemis conica Banks (for which a lectotype is designated), known from many islands; Coryssocnemis insularis Banks (for which a lectotype is designated), known from five islands; Coryssocnemis jarmila new species, a troglobite from Santa Cruz Island; Coryssocnemis floreana new species, a troglobite from Floreana Island; Hedypsilus culicinus Simon (for which a lectotype is designated), from Santa Cruz and San Cristóbal islands; Hedypsilus modicus new species, from San Cristóbal and Santiago islands (Modisimops Mello-Leitão is a NEW SYNONYM of Hedypsilus); Modisimus solus new species, from Santa Cruz Island; Pholcophora bella new species, from Santa Cruz Island; Pholcophora baerti new species, from Santa Fe and Pinta; Anopsicus banksi (Gertsch) from Floreana Island; Metagonia bellavista new species, a troglobite from Santa Cruz Island; and Metagonia reederi new species, a troglobite from Isabela Island. All are endemic to the islands, except H. culicinus, which is probably introduced. A stridulatory apparatus is reported on females of the genus Coryssocnemis for the first time. The troglobitic species of Coryssocnemis may have originated by parapatric speciation processes; the troglobitic species of Metagonia are relicts. In the troglobites the female epigynal characters are more differentiated than male palpal characters. A minimum of eight ancestral colonizations founded the Galápagos pholcid fauna.

scholarly journals Emergent conservation conflicts in the Galapagos Islands: Human-giant tortoise interactions in the rural area of Santa Cruz Island

PLoS ONE ◽  
2018 ◽  
Vol 13 (9) ◽  
pp. e0202268 ◽  
Author(s):  
Francisco Benitez-Capistros ◽  
Giorgia Camperio ◽  
Jean Hugé ◽  
Farid Dahdouh-Guebas ◽  
Nico Koedam
Keyword(s):  
Rural Area ◽  
Galapagos Islands ◽  
Galápagos Islands ◽  
Santa Cruz Island ◽  
Santa Cruz

New littoral mite species (Acari, Oribatida, Fortuyniidae) from the Galápagos archipelago, with ecological and zoogeographical considerations

Zootaxa ◽  
2017 ◽  
Vol 4244 (1) ◽  
pp. 39 ◽  
Author(s):  
TOBIAS PFINGSTL ◽  
HEINRICH SCHATZ
Keyword(s):  
Littoral Zone ◽  
Galapagos Islands ◽  
Mite Species ◽  
Galápagos Islands ◽  
Santa Cruz ◽  
Ecological Preferences ◽  
Galapagos Archipelago ◽  
Unique Character ◽  
Cuticular Ridge

Two species of Fortuyniidae, found on the Galápagos Islands (Ecuador) are described and illustrated based on the adult and juvenile instars. Alismobates galapagoensis sp. nov. was found on six islands of the archipelago, in littoral and supralittoral habitats. It is morphologically similar to A. inexpectatus Pfingstl & Schuster, 2012 from Bermuda, but differs from that species and all other known congeners by a prominent cuticular ridge on epimeron III among other unique character combinations. Litoribates caelestis gen. and sp. nov. was found on the islands Santa Cruz and Bartolomé in the littoral zone under Maytenus and mangroves. Notes on distribution and ecological preferences of both species are included. 

Entomogenous fungi from the Galápagos Islands

1982 ◽  
Vol 60 (11) ◽  
pp. 2325-2333 ◽  
Author(s):  
Harry C. Evans ◽  
Robert A. Samson
Keyword(s):  
Galapagos Islands ◽  
Verticillium Lecanii ◽  
Galápagos Islands ◽  
Santa Cruz ◽  
Entomogenous Fungi ◽  
Ecological Implications ◽  
Associated Species

Twenty-one species of entomogenous fungi, collected during a mycological survey of the island of Santa Cruz, are listed. Several coccid-associated species are described in detail, including Hirsutella sphaerospora sp. nov. on Eriococcid larvae; Hirsutella besseyi Fisher; and Torrubiella confragosa Mains, putative teleomorph of Verticillium lecanii (Zimm.) Viégas. In addition, Hirsutella darwinii on a spider host is described as new. The entomogenous mycoflora is similar to that of mainland Ecuador and the ecological implications are discussed particularly in relation to coccid populations.

A NEW EYELESS, STRIDULATING THERIDION SPIDER FROM CAVES IN THE GALÁPAGOS ISLANDS (ARANEAE, THERIDIIDAE)

1987 ◽  
Vol 119 (10) ◽  
pp. 881-885 ◽  
Author(s):  
Stewart B. Peck ◽  
William A. Shear
Keyword(s):  
Galapagos Islands ◽  
The Other ◽  
Galápagos Islands ◽  
Santa Cruz ◽  
Lava Tube ◽  
Stridulatory Apparatus

AbstractTheridion strepitus sp. nov. is described from lava tube caves from Isla Santa Cruz, Galápagos, Ecuador. It is the only species known in this worldwide genus that is eyeless and it is the only Galápagos species that has stridulatory picks on the male abdomen. The stridulatory apparatus demonstrates that the species is not a descendant from the other Theridion species known in the Galápagos, but is probably a relict of a lineage now extinct there in epigean habitats.

scholarly journals Psidium guajava in the Galapagos Islands: population genetics and history of an invasive species

2018 ◽  
Author(s):  
Diego Urquía ◽  
Bernardo Gutiérrez ◽  
Gabriela Pozo ◽  
María José Pozo ◽  
Analía Espín ◽  
...  
Keyword(s):  
Population Genetics ◽  
Invasive Plant ◽  
Psidium Guajava ◽  
Galapagos Islands ◽  
Historical Record ◽  
Galápagos Islands ◽  
Santa Cruz ◽  
Island Populations ◽  
Galapagos Archipelago ◽  
History Of

AbstractThe threat of invasive plant species in island populations prompts the need to better understand their population genetics and dynamics. In the Galapagos islands, this is exemplified by the introduced guava (Psidium guajava), considered one of the greatest threats to the local biodiversity due to its effective spread in the archipelago and its ability to outcompete endemic species. To better understand its history and genetics, we analyzed individuals from three inhabited islands in the Galapagos archipelago with 11 SSR markers. Our results reveal similar genetic diversity between islands, suggestive of gene flow between them. Populations appear to be distinct between the islands of San Cristobal and Isabela, with the population of Santa Cruz being composed as a mixture from both. Additional evidence for genetic bottlenecks and the inference of introduction events suggests an original introduction of the species in San Cristobal, from where it was later introduced to Isabela, and finally into Santa Cruz. Alternatively, an independent introduction event for Isabela is also possible. These results are contrasted with the historical record, providing a first overview of the history of P. guajava in the Galapagos islands and its current population dynamics.

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