The rocky reef fishes of Vermelha Beach, a marine estuarine transitional zone at Guanabara Bay, Brazil
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چکیده
منابع مشابه
Detectability of Estuarine Fishes in a Beach Seine Survey of Tidal Tributaries of Lower Chesapeake Bay
Detectability, the probability of encountering a species at a sampling site, is often overlooked in fisheries research despite its potential to obscure inferences on habitat use and lead to biased estimates of abundance. We used occupancy models to explore factors affecting detectability and occupancy ( ), the probability that a species inhabits a site, for three fishes frequently captured in C...
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The objective of this study was to report on some aspects of marine cladoceran reproduction in Guanabara Bay. Samples were collected during 1985 using a conical net with 200 microm mesh. Two species were identified: Penilia avirostris and Pseudevadne tergestina. Both species disappeared from the plankton in winter. Two months before this phenomenon, parthenogenetic females displayed reduction i...
متن کاملSympatric speciation in a genus of marine reef fishes.
Sympatric speciation has been contentious since its inception, yet is increasingly recognized as important based on accumulating theoretical and empirical support. Here, we present a compelling case of sympatric speciation in a taxon of marine reef fishes using a comparative and mechanistic approach. Hexagrammos otakii and H. agrammus occur in sympatry throughout their ranges. Molecular sequenc...
متن کاملPalynological analysis of a sediment core obtained in Guanabara Bay, Rio de Janeiro, Brazil.
The sediment of a core collected about 2 km north of Paquetá Island, Guanabara Bay, was submitted to pollen analysis, in order to recognize the dynamics of the regional vegetation, and the anthropic influence. Radiocarbon dating of a sample next to the bottom of the core indicates an age of 4.210+/-40 14C yrs B.P (calibrated age). It was possible to establish four palynological zones. Starting ...
متن کاملDigestive chitinolytic activity in marine fishes of Monterey Bay, California.
Chitinolytic activities, both chitinase (EC 3.2.1.14) and minimum chitobiase (beta-N-acetyl-D-glucosaminidase; EC 3.2.1.30), were measured in stomach and intestinal tissues and their contents, from 13 fish species. Higher activities were found in the tissues than in the gut contents, and higher activities were seen in the stomachs than in the intestines. Demersal species exhibited chitobiase ac...
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ژورنال
عنوان ژورنال: Latin American Journal of Aquatic Research
سال: 2017
ISSN: 0718-560X,0718-560X
DOI: 10.3856/vol45-issue1-fulltext-4