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| Sassi,Cristiane F. Costa; Farias,Gabriel M. de; Vasconcelos,Amanda de S.; Macedo,Rebeca S. de; França,Jéssica P. de S.; Sassi,Roberto. |
| ABSTRACT Histological analysis of bleached samples of Siderastrea stellata Verrill, 1868, with white plague disease and with alteration in the color pattern, revealed drastic tissue and cellular disturbances, such as lysis of the external epithelium, hyperplasia of gastrodermis, apoptosis of epithelial cells and zooxanthellae, and degradation of mesenteric filaments and reproductive cells. Fungal hyphae, diatoms, and cyanobacteria were present in diseased samples and colonies with alteration in the color pattern. Furthermore, bleached and diseased samples showed significant reductions in the number of zooxanthellae per 100 µm2 of gastrodermis and significant reductions in the diameters and volumes of stage V oocytes. We found that bleaching events,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian reefs; Coral diseases; Coral bleaching; Histopathology; Cellular disturbances. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212021000100207 |
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| Correia,Monica Dorigo; Coelho,Catarina Alves; Sovierzoski,Hilda Helena. |
| ABSTRACT Brazilian marine molluscs, especially Gastropoda and Bivalvia, are relatively well studied. However, information on the class Polyplacophora is more scarce, particularly on reef-dwelling forms. This study aimed to qualitatively and quantitatively analyze aspects of polyplacophorans from reef ecosystems and their associations with macroalgae on the coast of Maceió (state of Alagoas, Brazilian Northeast). The study area included five coral reefs at Ipioca, Ponta do Prego, Ponta do Meirim, Riacho Doce and Ponta Verde, as well as two sandstone reefs, located in Guaxuma and Sereia. The samples were obtained by snorkelling along the intertidal and subtidal reef zones to a depth of up to five meters during low tides, between 2009 and 2011. In addition,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chitons; Brazilian reefs; Biodiversity; Phytal; Temporal distribution. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000400289 |
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