scholarly journals A Synoptic Assessment of the Amazon River-Ocean Continuum during Boreal Autumn: From Physics to Plankton Communities and Carbon Flux

2017 ◽  
Vol 8 ◽  
Author(s):  
Moacyr Araujo ◽  
Carlos Noriega ◽  
Gbekpo Aubains Hounsou-gbo ◽  
Doris Veleda ◽  
Julia Araujo ◽  
...  
Keyword(s):  
Carbon Flux ◽  
Amazon River ◽  
Synoptic Assessment ◽  
Plankton Communities

Routine identification of four sympatric species of calanoid copepods Pseudocalanus spp. in the Atlantic Arctic using a species-specific polymerase chain reaction

2020 ◽  
Vol 48 (1) ◽  
pp. 62-72
Author(s):  
E. A. Ershova
Keyword(s):  
Polymerase Chain Reaction ◽  
Life Cycles ◽  
The Arctic ◽  
Relative Distribution ◽  
Chain Reaction ◽  
Specific Polymerase Chain Reaction ◽  
Routine Identification ◽  
Polymerase Chain ◽  
Species Specific ◽  
Plankton Communities

Сalanoid copepods of the genus Pseudocalanus play an important role in the plankton communities of the Arctic and boreal seas, often dominating in numbers and constituting a significant proportion of the biomass of zooplankton. Despite their high presence and significance in the shelf plankton communities, species-specific studies of the biology of these are significantly hampered by extremely small morphological differences between them, especially at the juvenile stages, at which they are virtually indistinguishable. In this paper, we describe a new, routine and low-cost molecular method for identifying all Pseudocalanus species found in the Atlantic sector of the Arctic: the Arctic P. acuspes, P. minutus and the boreal P. moultoni and P. elongatus, and apply it to describe the relative distribution of these species in four locations of the Arctic and sub-Arctic. With this method, species-specific polymerase chain reaction (ssPCR), mass identification of individuals of any developmental stage, including nauplii, is possible. This method can serve as an excellent tool for studying the species-specific biology of this group, describing their life cycles, as well as monitoring changes in Arctic marine ecosystems under the influence of changing climate.

Reproductive Biology and Sexual Dimorphism of Gymnophthalmus vanzoi (Squamata, Gymnophthalmidae) in a Population South of the Amazon River, Brazil

2020 ◽  
Vol 2020 (15) ◽  
pp. 30
Author(s):  
Maiume Silva-da-Silva ◽  
Danilo Augusto Almeida-Santos ◽  
Síria Ribeiro ◽  
Renato Sousa Recoder ◽  
Alfredo P. Santos
Keyword(s):  
Sexual Dimorphism ◽  
Reproductive Biology ◽  
Amazon River

CO-MANAGEMENT OF FISHERY RESOURCES IN THE FLOODPLAIN COMMUNITIES OF THE MIDDLE AND LOWER AMAZON RIVER, BRAZIL

2011 ◽  
Vol 6 (2) ◽  
pp. 45-55
Author(s):  
Jorge Iván Sánchez-Botero ◽  
Danielle Sequeira Garcez ◽  
Marcelo Derzi Vidal
Keyword(s):  
Amazon River ◽  
Fishery Resources
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