Cirripedia of the Canary Islands: distribution and ecological notes

The present paper is the first annotated account listing all species of Cirripedia: Thoracica recorded from the Canary Islands (eastern Atlantic Ocean) together with notes on their distribution and ecology. Voucher specimens have been deposited as reference material in the collection of the Instituto Canario de Ciencias Marinas. Seventeen species are listed and seven of them are recorded for the first time for the Canaries: Lepas hilli, Conchoderma virgatum, Xenobalanus globicipitis, Chthamalus sp. (cf. C. proteus), Acasta cyathus, Balanus trigonus and Perforatus perforatus.

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New records of benthic marine algae from Morocco (eastern Atlantic Ocean): morphology, taxonomy and distribution

Acta Botanica Malacitana ◽

10.24310/abm.v43i0.3265 ◽

2018 ◽

Vol 43 ◽

pp. 111-116

Author(s):

Mustapha Hassoun ◽

Hanaa Moussa ◽

Ghizlane Salhi ◽

Hanaa Zbakh ◽

Hassane Riadi ◽

...

Keyword(s):

Atlantic Ocean ◽

New Record ◽

Pacific Islands ◽

New Records ◽

Atlantic Coast ◽

Marine Macroalgae ◽

Eastern Coast ◽

Western Coast ◽

Eastern Atlantic Ocean ◽

First Time

AbstractWe report new records and corological data for three Moroccan marine macroalgae that complete their distribution information. Radicilingua thysanorhizans is new record for Morocco; Champia compressa is recorded for the first time from the eastern coast of the Atlantic Ocean. Diplothamnion jolyi is widely distributed in the western coast of the Atlantic coast and Pacific Islands, and recently reported from the Mediterranean Sea; this new record from Moroccan Atlantic coast extends their distribution range.Key words: Algae, Atlantic Ocean, Champia compressa, Diplothamnion jolyi, Radicilingua thysanorhizans.ResumenSe aportan nuevos registros y datos corológicos para tres macroalgas marinas de Marruecos, que completan la información sobre su distribución. Radicilingua thysanorhizans es cita nueva para Marruecos. Champia compressa se registra por la primera vez en la costa oriental del Océano Atlántico. Diplothamnion jolyi se distribuye ampliamente en la costa occidental de la costa atlántica y las islas del Pacífico y ha sido recientemente citada en el mar Mediterráneo; esta nueva cita para costa Atlántica Marroquí amplia su rango de distribución.Palabras clave: Algae, Océano Atlántico, Champia compressa, Diplothamnion jolyi, Radicilingua thysanorhizans.

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Halimeda incrassata (Bryopsidales, Chlorophyta) reaches the Canary Islands: mid- and deep-water meadows in the eastern subtropical Atlantic Ocean

Botanica Marina ◽

10.1515/bot-2017-0104 ◽

2018 ◽

Vol 61 (2) ◽

pp. 103-110 ◽

Cited By ~ 3

Author(s):

Carlos Sangil ◽

Laura Martín-García ◽

Julio Afonso-Carrillo ◽

Jacinto Barquín ◽

Marta Sansón

Keyword(s):

Atlantic Ocean ◽

Canary Islands ◽

Deep Water ◽

Population Coverage ◽

Isolated Populations ◽

La Palma ◽

Soft Bottoms ◽

The Caribbean ◽

Marine Flora ◽

First Time

AbstractExtensive offshore meadows ofHalimeda incrassataare documented for the first time in sandy bottoms of La Palma, Canary Islands.Halimeda incrassataforms dense sublittoral assemblages between 20 and 55 m, but isolated populations occur down to 65 m depth. This species currently spreads over an area of 9.14 ha. Population coverage varies with depth, with the highest values at 35–40 m and an average cover of 62.34%. The calcified segments ofH. incrassataact as a stable substratum in these soft bottoms for the growth of other macroalgae, such as the rhodophytesLophocladia trichocladosandCottoniella filamentosa. Specimens reach lengths of up to 10 cm, shorter than individuals from the Caribbean. Although it is difficult to ascertain whether this species is a recent introduction, there is evidence of a correlation between the increase in population coverage and recent ocean warming, constituting another example of the tropicalization of the marine flora of this region.

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Further Advance of Gambierdiscus Species in the Canary Islands, with the First Report of Gambierdiscus belizeanus

Toxins ◽

10.3390/toxins12110692 ◽

2020 ◽

Vol 12 (11) ◽

pp. 692 ◽

Cited By ~ 2

Author(s):

Àngels Tudó ◽

Greta Gaiani ◽

Maria Rey Varela ◽

Takeshi Tsumuraya ◽

Karl B. Andree ◽

...

Keyword(s):

Canary Islands ◽

Neuroblastoma Cell ◽

Electrochemical Immunosensor ◽

Benthic Dinoflagellates ◽

Food Borne ◽

Eastern Atlantic Ocean ◽

North Eastern ◽

Colorimetric Immunoassay ◽

Ancient Times ◽

First Time

Ciguatera Poisoning (CP) is a human food-borne poisoning that has been known since ancient times to be found mainly in tropical and subtropical areas, which occurs when fish or very rarely invertebrates contaminated with ciguatoxins (CTXs) are consumed. The genus of marine benthic dinoflagellates Gambierdiscus produces CTX precursors. The presence of Gambierdiscus species in a region is one indicator of CP risk. The Canary Islands (North Eastern Atlantic Ocean) is an area where CP cases have been reported since 2004. In the present study, samplings for Gambierdiscus cells were conducted in this area during 2016 and 2017. Gambierdiscus cells were isolated and identified as G. australes, G. excentricus, G. caribaeus, and G. belizeanus by molecular analysis. In this study, G. belizeanus is reported for the first time in the Canary Islands. Gambierdiscus isolates were cultured, and the CTX-like toxicity of forty-one strains was evaluated with the neuroblastoma cell-based assay (neuro-2a CBA). G. excentricus exhibited the highest CTX-like toxicity (9.5–2566.7 fg CTX1B equiv. cell−1) followed by G. australes (1.7–452.6.2 fg CTX1B equiv. cell−1). By contrast, the toxicity of G. belizeanus was low (5.6 fg CTX1B equiv. cell−1), and G. caribaeus did not exhibit CTX-like toxicity. In addition, for the G. belizeanus strain, the production of CTXs was evaluated with a colorimetric immunoassay and an electrochemical immunosensor resulting in G. belizeanus producing two types of CTX congeners (CTX1B and CTX3C series congeners) and can contribute to CP in the Canary Islands.

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Chronology and causes of the extinction of the Lava Mouse,Malpaisomys insularis(Rodentia: Muridae) from the Canary Islands

Quaternary Research ◽

10.1016/j.yqres.2008.04.012 ◽

2008 ◽

Vol 70 (2) ◽

pp. 141-148 ◽

Cited By ~ 14

Author(s):

Juan Carlos Rando ◽

Josep Antoni Alcover ◽

Juan Francisco Navarro ◽

Francisco García-Talavera ◽

Rainer Hutterer ◽

...

Keyword(s):

Invasive Species ◽

Atlantic Ocean ◽

Alien Species ◽

Canary Islands ◽

Mus Musculus ◽

Late Holocene ◽

Human Impacts ◽

Eastern Atlantic Ocean ◽

Accelerator Mass Spectrometer ◽

Owl Pellets

AbstractUnderstanding late Holocene extinctions on islands requires accurate chronologies for all relevant events, including multiple colonisations by humans and the introduction of alien species. The most widely held hypothesis on the causes of Holocene island vertebrate extinctions incorporates human impacts, although climatic-related hypotheses cannot be excluded. Both hypotheses have been suggested to account for the extinction of the endemic Lava Mouse,Malpaisomys insularisfrom the Canary Islands. Here we present the first accelerator mass spectrometer (AMS)14C ages from collagen ofM. insularisbones from ancient owl pellets collected at Fuerteventura (Canary Islands, eastern Atlantic Ocean). These new dates contribute to an understanding of the extinction of this species. We are able to exclude climatic causes, predation by invasive species, and competition with the house mouse,Mus musculus. The arrival of Europeans in the Canary Islands correlates with the extinction ofMalpaisomys. The introduction of rats,Rattusspp., together with their parasites and diseases, emerges as the most reasonable hypothesis explaining the extinction ofM. insularis.

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