Colección de corales pétreos de Cuba. [Versión electrónica para multimedia del libro Corales Pétreos de Cuba publicado en 1980 por Nereida Martínez Estalella y Vasil Zlatarski.]

Versión electrónica para multimedia del libro Corales Pétreos de Cuba publicado en 1980 por Nereida Martínez Estalella y Vasil Zlatarski. La colección de Corales pétreos se formó en el Instituto de Oceanología entre los años 1970 y 1975. En 2005 pasa a ser custodiada por el Acuario Nacional con el resto de las colecciones biológicas. La colección está formada por 4,990 ejemplares, 2 Clases Anthozoa e Hydrozoa , 16 familias, 30 géneros, 45 especies y 23 formas. Multimedia electronic book version of Stony Corals Cuba published in 1980 by Nereida Martínez Estalella and Vasil Zlatarski. The collection of stony corals are formed at the Institute of Oceanology between 1970 and 1975. Renumbered in 2005 by the National Aquarium guarded with other biological collections. The collection consists of 4,990 samples, 2 classes Anthozoa and Hydrozoa, 16 families, 30 genera, 45 species and 23 forms

Shallow-water scleractinian corals of Ascension Island, Central South Atlantic

The presence of five shallow-water scleractinian species at Ascension Island is confirmed, i.e. Favia gravida, Madracis sp., Siderastrea radians, Polycyathus atlanticus and Rhizosmilia gerdae. The three former are zooxanthellate, the two latter azooxanthellate. A sixth species, Cladocora debilis (azooxanthellate), dredged from moderately deep water is also expected to occur in shallow water. Madracis sp. and P. atlanticus are new records for the island. A previous record of Astrangia solitaria at Ascension is now referred to as P. atlanticus. Favia gravida, S. radians and C. debilis are amphi-Atlantic. Rhizosmilia gerdae is currently known only from Ascension Island and the Western Atlantic. None of the species are endemic to Ascension Island. No member of the family Dendrophylliidae has as yet been found at Ascension, whereas that family is represented at its nearest neighbour, St Helena Island.Darwin Initiative [EIDCF012]; Regional Council of Brittany; European Funds (ERDF); 'Laboratoire d'Excellence' LabexMER [ANR-10-LABX-19]; French government under the programme 'Investissements d'Avenir'info:eu-repo/semantics/publishedVersio

Porites-Colonensis, New Species Of Stony Coral (Anthozoa, Scleractinia) Off The Caribbean Coast Of Panama

Volume: 103Start Page: 257End Page: 26

Geologische Untersuchungen im centralen Balkan und in den angrenzenden Gebieten. Beitr\ue4ge zur Geologie des n\uf6rdlichen Balkanvorlandes zwischen den Fl\ufcssen Isker und Jantra

Volume: 93Start Page: 249End Page: 34

The reticulate coral reef system in Golfo de Guacanayabo, SE Cuba

The Gran Banco de Buena Esperanza (GBBE) coral reef system in Golfo de Guacanayabo in southeastern Cuba consists of a reticular structure comprising a maze of steep to vertical ridges with planar tops rising 20–25 m from the bay floor. The planar tops of the ridges are densely populated by small colonies of sediment-resistant Scleractinia with fragile, branching colony growth forms. The initiation of a reticulate reef system in the absence of karst or other antecedent hard substrates is unprecedented. In this note, we describe the unique geological setting, geomorphology and scleractinian diversity of the GBBE and present an explanation for its development. We suggest that convection-driven self-organization of coral skeletal fragments may be responsible for the reticulate pattern observed as 75 m of reef limestone accreted during Holocene time. Finally, we briefly discuss the evolutionary benefits of coral hybridization and the potential for rapid coral reef growth in turbid, muddy environments

Enumeration of the doubles of the projective plane of order 4

AbstractA classification of the doubles of the projective plane of order 4 with respect to the order of the automorphism group is presented and it is established that, up to isomorphism, there are 1746461307 doubles. We start with the designs possessing non-trivial automorphisms. Since the designs with automorphisms of odd prime orders have been constructed previously, we are left with the construction of the designs with automorphisms of order 2. Moreover, we establish that a 2-(21,5,2) design cannot be reducible in two inequivalent ways. This makes it possible to calculate the number of designs with only the trivial automorphism, and consequently the number of all double designs. Most of the computer results are obtained by two different approaches and implementations