scholarly journals Morphological and genetic data suggest a complex pattern of inter-island colonisation and differentiation for mining bees (Hymenoptera: Anthophila: Andrena) on the Macaronesian Islands

2021 ◽  
Author(s):  
Anselm Kratochwil ◽  
Robert J. Paxton ◽  
Angelika Schwabe ◽  
Antonio Miguel Franquinho Aguiar ◽  
Martin Husemann
Keyword(s):  
Canary Islands ◽  
Dna Sequences ◽  
Oceanic Islands ◽  
Mitochondrial Coi ◽  
La Palma ◽  
Madeira Archipelago ◽  
Macaronesian Islands ◽  
Radiation Processes ◽  
Coi Sequences ◽  
La Gomera

AbstractOceanic islands have long been considered engines of differentiation and speciation for terrestrial organisms. Here we investigated colonisation and radiation processes in the Madeira Archipelago and the Canary Islands of the Andrena wollastoni group of bees (subgenus Micrandrena), which comprises six endemic species and five endemic subspecies on the islands. Mitochondrial COI sequences support the monophyly of the four species of the Canary Islands and the two species of the Madeira Archipelago and suggest a relatively young age for all taxa. The data do not support a simple stepping-stone model (eastern-western colonisation from the mainland, with splitting into new taxa), but suggest Andrena gomerensis (extant on La Gomera and La Palma) or its ancestor as the basal lineage from which all other taxa evolved. Andrena lineolata (Tene-rife) or its putative ancestor (A. gomerensis) is sister to A. dourada (Porto Santo), A. catula (Gran Canaria), and A. acuta (also Tenerife). Andrena dourada (Porto Santo) and A. wollastoni (Madeira Island) are sister species. Morphologically and morphometrically defined subspecies were not distinguishable with COI DNA sequences. Colonisation likely led from the Canary Islands to the Madeira Archipelago and not from the mainland directly to the latter.

scholarly journals Molecular evidence for sweeping discontinuity between peracarid (Crustacea) fauna of Macaronesian islands and nearby continental coasts: over fifty candidate endemic species

2021 ◽  
Author(s):  
Pedro E Vieira ◽  
Andrea Desiderato ◽  
Carla L Azevedo ◽  
Patricia Esquete ◽  
Filipe O Costa ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Marine Invertebrates ◽  
Genetic Distances ◽  
Oceanic Islands ◽  
Marine Conservation ◽  
Molecular Evidence ◽  
Network Analyses ◽  
Operational Taxonomic Units ◽  
La Palma ◽  
Macaronesian Islands

Oceanic islands are recognized evolutionary hotspots for terrestrial organisms, but little is known about their impact on marine organisms' evolution and biogeography. The volcanic archipelagos of Macaronesia occupy a vast and complex region which is particularly suitable to investigate marine island biogeography. In this study, we used mitochondrial DNA sequences to investigate the genetic diferentiation between the populations from Webbnesia (i.e. Madeira, Selvagens and Canaries) and adjacent coasts, of 23 intertidal peracarid species. All species had unexpectedly high intraspecific genetic distances, reaching more than 20% in some cases. Between 79 and 95 Molecular Operational Taxonomic Units (MOTUs) were found in these species. Webbnesia populations displayed an impressive genetic diversity and high endemicity, with 83% of the MOTUs being private to these islands, particularly La Palma and Madeira. Network analyses suggested higher similarity between Webbnesia and Azores than with adjacent continental coasts. These results reveal an unanticipated and sweeping biogeographic discontinuity of peracaridean fauna between Webbnesia and the Iberian Peninsula, raising suspicion about the possible occurrence of identical patterns in other groups of marine invertebrates in the region. We emphasize the unique genetic heritage hosted by these islands, underlining the need to consider the fine scale endemicity in marine conservation efforts.

scholarly journals Analyzing Transportation Sustainability in the Canary Islands Archipelago

2020 ◽  
Vol 5 (7) ◽  
pp. 58 ◽  
Author(s):  
Rui Alexandre Castanho ◽  
Arian Behradfar ◽  
Ana Vulevic ◽  
José Manuel Naranjo Gómez
Keyword(s):  
Sustainable Development ◽  
Case Studies ◽  
Canary Islands ◽  
Social Economic ◽  
La Palma ◽  
Regional Management ◽  
The Social ◽  
Relevant Case ◽  
Scarcity Of Resources ◽  
La Gomera

The scarcity of resources, the limited land, and the overstressing of tourism, as well as the estrangements of movement, make the insular territories relevant case studies in terms of their regional management and governance and, consequently, sustainable development. Thereby, Transportation and Infrastructures’ Sustainability in these territories is not an exception. In this regard, the present study, through exploratory tools, expects to analyze, using accessibility and connectivity indicators, the impacts over the social-economic sphere that the local Transportation and Infrastructures may deliver to the populations of the Canary Islands Archipelago. The study enables us to identify the islands of La Palma, El Hierro, Fuerteventura, and La Gomera as those with better accessibility patterns.

scholarly journals Population structure of the banana weevil, an introduced pest in the Canary Islands, studied by RAPD analysis

2007 ◽  
Vol 97 (6) ◽  
pp. 585-590 ◽  
Author(s):  
C. Magaña ◽  
B. Beroiz ◽  
P. Hernández-Crespo ◽  
M. Montes de Oca ◽  
A. Carnero ◽  
...  
Keyword(s):  
Costa Rica ◽  
Genetic Distance ◽  
Canary Islands ◽  
Insect Pests ◽  
Random Amplified Polymorphic Dna ◽  
Fixation Index ◽  
Banana Weevil ◽  
La Palma ◽  
La Gomera ◽  
Nei's Genetic Distance

AbstractThe banana weevil (BW), Cosmopolites sordidus (Coleoptera: Curculionidae), is one of the most important insect pests of bananas and plantains. The mobility and the origin of BW infestations at the Canary Islands (Tenerife, La Gomera and La Palma) have been analysed using Random Amplified Polymorphic DNA (RAPD) as molecular markers. Populations from Costa Rica, Colombia, Uganda and Madeira were also included for comparison. One hundred and fifteen reproducible bands from eight primers were obtained. The level of polymorphism in the populations from the Canary Islands (40–62%) was in the range of those found in other populations. Nei's genetic distances, pair-wise fixation index (FST) values indicate that the closest populations are Tenerife populations among themselves (Nei's genetic distance=0.054–0.100; FST=0.091–0.157) and Costa Rica and Colombia populations (Nei's genetic distance=0.049; FST=0.113). Our results indicate the existence of BW local biotypes with limited gene flow and affected by genetic drift. These results are compatible with a unique event of colonization at Tenerife; whereas, the outbreaks in La Gomera and La Palma may come from independent introductions. The Madeira population is phylogenetically and geographically closer to the Canary Islands populations, suggesting that it is the most likely source of the insects introduced in the Canary Islands.

Presence of Stenoponia tripectinata (Tiraboschi, 1902) (Siphonaptera, Ctenophtalmidae) in murine (Rodentia) from the Canary Islands

2012 ◽  
Vol 57 (2) ◽  
Author(s):  
Santiago Vicente ◽  
Maria Gómez López
Keyword(s):  
Canary Islands ◽  
North Africa ◽  
Mus Musculus ◽  
Rattus Rattus ◽  
Flea Species ◽  
Gran Canaria ◽  
El Hierro ◽  
La Palma ◽  
The Mediterranean ◽  
La Gomera

AbstractThis article reports the geographical and host distribution of the flea Stenoponia tripectinata on the Canary Islands. S. tripectinata is widely distributed throughout the Mediterranean and North Africa as a parasite of Muridae rodents. To date, Gran Canaria is the only island of the archipelago where S. tripectinata had been found. In this report, S. tripectinata has appeared parasitizing 116 specimens of Mus musculus out of a total of 660, and only 2 Rattus rattus of 215 captured. All the trapped Muridae hosts found to be parasitized by S. tripectinata came from humid biotopes. The results showed that S. tripectinata is present on all the western Canary Islands and on one of the eastern islands, Gran Canaria, the only island already reported. The detection of S. tripectinata on El Hierro, La Palma, La Gomera and Tenerife represents the first records of this flea species on those Canary Islands.

Buellia Laurocanariensis, a New Species from the Canary Islands

2002 ◽  
Vol 34 (3) ◽  
pp. 203-206 ◽  
Author(s):  
Mireia Giralt ◽  
Javier Etayo ◽  
Pieter van den Boom
Keyword(s):  
New Species ◽  
Canary Islands ◽  
Type B ◽  
La Palma ◽  
A New Species ◽  
La Gomera

AbstractA new corticolous species of Buellia is described from La Palma and La Gomera (Canary Islands). It is mainly characterized by its strongly ornamented, (l-2)-3-septate ascospores with apical and septa thickenings, which follow an ascospore-ontogeny of type B, and its chemistry. The new species is compared with the related Buellia lauricassiae (Fée) Mü. Arg. and B. lauricassiaeoides Aptroot. Illustrations of the ascospores of B. laurocanariensis and B. lauricassiaeoides are presented. A habit photograph of the new species is also provided.

scholarly journals A new synonym and new records of Tychiini (Coleoptera, Curculionidae) from Madeira Archipelago and Selvagens Islands

Zootaxa ◽  
2008 ◽  
Vol 1781 (1) ◽  
pp. 63
Author(s):  
ROBERTO CALDARA ◽  
DORA AGUÍN-POMBO
Keyword(s):  
Canary Islands ◽  
New Records ◽  
Junior Synonym ◽  
La Palma ◽  
Madeira Archipelago ◽  
New Synonym ◽  
First Time

Tychius bicolor Brisout, 1862 and Sibinia arenariae Stephens, 1831 are reported from the Archipelago of Madeira, respectively Madeira and Porto Santo, for the first time. Two additional specimens of T. filirostris Wollaston, 1854, known previously from only two specimens from Porto Santo, were examined. Following the study of these specimens and others from the Canary Islands (Tenerife, La Palma) and Selvagen Pequena, T. colonnellii Caldara, 1991 from Tenerife is proposed as a junior synonym of T. filirostris.

scholarly journals Ciguatera-Causing Dinoflagellate Gambierdiscus spp. (Dinophyceae) in a Subtropical Region of North Atlantic Ocean (Canary Islands): Morphological Characterization and Biogeography

Toxins ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 423 ◽  
Author(s):  
Isabel Bravo ◽  
Francisco Rodriguez ◽  
Isabel Ramilo ◽  
Pilar Rial ◽  
Santiago Fraga
Keyword(s):  
Canary Islands ◽  
Cultured Cells ◽  
North Atlantic Ocean ◽  
Morphological Variability ◽  
Molecular Data ◽  
Morphological Characterization ◽  
La Palma ◽  
Field Samples ◽  
Length Width ◽  
La Gomera

Dinoflagellates belonging to the genus Gambierdiscus produce ciguatoxins (CTXs), which are metabolized in fish to more toxic forms and subsequently cause ciguatera fish poisoning (CFP) in humans. Five species of Gambierdiscus have been described from the Canary Islands, where CTXs in fish have been reported since 2004. Here we present new data on the distribution of Gambierdiscus species in the Canary archipelago and specifically from two islands, La Palma and La Gomera, where the genus had not been previously reported. Gambierdiscus spp. concentrations were low, with maxima of 88 and 29 cells·g−1 wet weight in samples from La Gomera and La Palma, respectively. Molecular analysis (LSUrRNA gene sequences) revealed differences in the species distribution between the two islands: only G. excentricus was detected at La Palma whereas four species, G. australes, G. caribaeus, G. carolinianus, and G. excentricus, were identified from La Gomera. Morphometric analyses of cultured cells of the five Canary Islands species and of field specimens from La Gomera included cell size and a characterization of three thecal arrangement traits: (1) the shape of the 2′ plate, (2) the position of Po in the anterior suture of the 2′ plate, and (3) the length–width relationship of the 2″″ plate. Despite the wide morphological variability within the culture and field samples, the use of two or more variables allowed the discrimination of two species in the La Gomera samples: G. cf. excentricus and G. cf. silvae. A comparison of the molecular data with the morphologically based classification demonstrated important coincidences, such as the dominance of G. excentricus, but also differences in the species composition of Gambierdiscus, as G. caribaeus was detected in the study area only by using molecular methods.

scholarly journals The Amphipod Genus Pseudoniphargus (Crustacea) in the Canary Islands

1988 ◽  
Vol 58 (1) ◽  
pp. 47-78 ◽  
Author(s):  
Jan H. Stock
Keyword(s):  
Iberian Peninsula ◽  
Canary Islands ◽  
Systematic Sampling ◽  
Gran Canaria ◽  
El Hierro ◽  
La Palma ◽  
La Gomera

Pseudoniphargus was known from inland stygohabitats in the Iberian peninsula, the Azores, Madeira, N.W. Africa, and Bermuda, but not from the Canary Islands. Systematic sampling in six of the seven larger islands of the latter archipelago has revealed the presence of the genus in Tenerife (4 species), La Palma (2 species), La Gomera (1 species), and El Hierro (1 species). No Pseudoniphargus has been found in Lanzarote and Fuerteventura; Gran Canaria has not been sampled systematically.

scholarly journals First citation of Macrocoma splendens for La Gomera, Canary Islands (Coleoptera Chrysomelidae Eumolpinae)

2020 ◽  
Vol 152 (3) ◽  
pp. 105-106
Author(s):  
Stefano Zoia
Keyword(s):  
Canary Islands ◽  
La Palma ◽  
First Time ◽  
La Gomera

Macrocoma splendens Lindberg, 1950, is reported for the first time for La Gomera (Canary Islands) and examined specimens are compared with specimens collected at La Palma and tenerife. this is the first citation of a Macrocoma species for La Gomera.

Two new Napaeus species from La Gomera and La Palma (Canary Islands) (Gastropoda: Pulmonata: Enidae)

2011 ◽  
Vol 140 (1) ◽  
pp. 37-48 ◽  
Author(s):  
Geraldine A. Holyoak ◽  
David T. Holyoak ◽  
Yurena Yanes ◽  
Maria Alonso ◽  
Miguel Ibañez
Keyword(s):  
Canary Islands ◽  
La Palma ◽  
La Gomera
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