Population dynamics of the mud shrimp Upogebia omissa (Crustacea: Gebiidea: Upogebiidae) from the southwestern Atlantic coast of Brazil

2020 ◽  
Vol 36 ◽  
pp. 101281
Author(s):  
Larissa Bacelar Costa ◽  
Nídia Melo Marinho ◽  
Paulo V.V.C. Carvalho ◽  
Monica Lucia Botter-Carvalho
Keyword(s):  
Population Dynamics ◽  
Atlantic Coast ◽  
Southwestern Atlantic ◽  
Mud Shrimp

scholarly journals Insights of the life history in the porcellanid crab Petrolisthes armatus (Gibbes, 1850) (Crustacea: Anomura: Porcellanidae) from the Southwestern Atlantic coast

2017 ◽  
Vol 61 (2) ◽  
pp. 78-89 ◽  
Author(s):  
Marcelo Antonio Amaro Pinheiro ◽  
Marcio Camargo Araujo João ◽  
Maria Helena Arruda Leme ◽  
Akeme Milena Ferreira Matsunaga ◽  
Juliana Priscila Piva Rio ◽  
...  
Keyword(s):  
Life History ◽  
Atlantic Coast ◽  
Southwestern Atlantic ◽  
Petrolisthes Armatus

scholarly journals BIOGEOGRAPHIC SHELL SHAPE VARIATION INTROPHON GEVERSIANUS(GASTROPODA: MURICIDAE) ALONG THE SOUTHWESTERN ATLANTIC COAST

Palaios ◽  
2018 ◽  
Vol 33 (11) ◽  
pp. 498-507 ◽  
Author(s):  
MARIANO E. MALVÉ ◽  
MARCELO M. RIVADENEIRA ◽  
SANDRA GORDILLO
Keyword(s):  
Atlantic Coast ◽  
Shell Shape ◽  
Southwestern Atlantic ◽  
Shape Variation

scholarly journals Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic

2011 ◽  
Vol 101 (1-2) ◽  
pp. 5-14 ◽  
Author(s):  
Douglas F Peiró ◽  
Fernando L Mantelatto
Keyword(s):  
Population Dynamics ◽  
Sandy Beach ◽  
Southwestern Atlantic ◽  
Recruitment Pattern ◽  
Size Frequency Distribution ◽  
Ghost Shrimp ◽  
Density Values ◽  
Pea Crab ◽  
Biological Aspects ◽  
The Mean

The Pinnotheridae family is one of the most diverse and complex groups of brachyuran crabs, many of them symbionts of a wide variety of invertebrates. The present study describes the population dynamics of the pea crab Austinixa aidae (Righi, 1967), a symbiont associated with the burrows of the ghost shrimp Callichirus major (Say, 1818). Individuals (n = 588) were collected bimonthly from May, 2005 to September, 2006 along a sandy beach in the southwestern Atlantic, state of São Paulo, Brazil. Our data indicated that the population demography of A. aidae was characterized by a bimodal size-frequency distribution (between 2.0 and 4.0 mm and between 8.0 and 9.0 mm CW) that remained similar throughout the study period. Sex ratio does not differ significantly from 1:1 (p > 0.05), which confirms the pattern observed in other symbiontic pinnotherids. Density values (1.72 ± 1.34 ind. • ap.-1) are in agreement with those found for other species of the genus. The mean symbiosis incidence (75.6%) was one of the highest among species of the Pinnotheridae family, but it was the lowest among the three studied species of the genus. Recruitment pattern was annual, beginning in May and peaking in July, in both years, after the peak of ovigerous females in the population (from March to May). Our findings describe ecological and biological aspects of A. aidae similar to those of other species of this genus, even from different geographic localities.

scholarly journals Undercover speciation of wentletraps (Caenogastropoda: Epitoniidae) in the Southwestern Atlantic

Zootaxa ◽  
2017 ◽  
Vol 4286 (1) ◽  
pp. 41
Author(s):  
DIEGO G. ZELAYA ◽  
MARINA GÜLLER
Keyword(s):  
New Species ◽  
Atlantic Coast ◽  
Intraspecific Variability ◽  
Shell Morphology ◽  
Southwestern Atlantic ◽  
Number Of Species ◽  
Anatomical Characters ◽  
Three New Species ◽  
First Time ◽  
Species Being

Despite being one of the most speciose families, Epitoniidae still remains at present as one of the least understood gastropod families worldwide. This is a consequence of most of the species being only known from shell morphology, added to the wide intraspecific variability of this character and the fact that shell morphology has proven to have frequent examples of parallelisms and convergences among different (unrelated) species. Knowledge of other morphological and anatomical characters in this group is still in its first steps, and such information is currently available for a limited number of species, thus being difficult (when not impossible) to evaluate its taxonomic value. The aim of this study is to re-evaluate the diversity of Epitoniidae occurring in the Atlantic coast of Patagonia. As part of this study, the validity of only four of the six species described / reported from this area could be confirmed: Epitonium georgettinum, E. striatellum, E. fabrizioi and “Cirsotrema” magellanicum. In addition, three new species were recognized and are described herein: Epitonium evanidstriatum, “Cirsotrema” ctenodentatum and “Cirsotrema” strebeli. Information on the shell (including the protoconch), operculum, radula and jaw for these species is here provided, in most cases for the first time. A neotype for Scalaria magellanica is here designated. Furthermore, “Cirsotrema” georgeanum is here proposed as a replacement name for Scalaria fenestrata Strebel, 1908 (not Meneghini in de Stefani, 1875, nor Scalaria fenestrata Wöhrmann, 1889); and that taxon is regarded as a full species, instead of as a synonym of “Cirsotrema” magellanicum, as suggested in some previous publications. This study reveals that the usage of isolated (either morphological or anatomical) characters is usually insufficient for identifying some of the species from Patagonia; however, if these characters are combined, all species may be clearly recognized. 

Genetic barcoding confirms the presence of the neurotoxic sea slug Pleurobranchaea maculata in southwestern Atlantic coast

2016 ◽  
Vol 43 (3) ◽  
pp. 292-298 ◽  
Author(s):  
NE Farias ◽  
SA Wood ◽  
S Obenat ◽  
E Schwindt
Keyword(s):  
Atlantic Coast ◽  
Southwestern Atlantic ◽  
Sea Slug ◽  
Genetic Barcoding

scholarly journals Molecular and phylogenetic identification of an oil-producing strain of Nannochloropsis oceanica (Eustigmatophyceae) isolated from the southwestern Atlantic coast (Argentina)

2014 ◽  
Vol 49 (3) ◽  
pp. 615-623 ◽  
Author(s):  
Natalia Bongiovani ◽  
M. Virginia Sanchez-Puerta ◽  
Cecilia Popovich ◽  
Patricia Leonardi
Keyword(s):  
Atlantic Coast ◽  
Nannochloropsis Oceanica ◽  
Southwestern Atlantic ◽  
Phylogenetic Identification

scholarly journals Population genetic structure of Guiana dolphin (Sotalia guianensis) from the southwestern Atlantic coast of Brazil

PLoS ONE ◽  
2017 ◽  
Vol 12 (8) ◽  
pp. e0183645 ◽  
Author(s):  
Juliana Ywasaki Lima ◽  
Filipe Brum Machado ◽  
Ana Paula Cazerta Farro ◽  
Lupércio de Araújo Barbosa ◽  
Leonardo Serafim da Silveira ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Atlantic Coast ◽  
Southwestern Atlantic ◽  
Sotalia Guianensis ◽  
Guiana Dolphin

scholarly journals Morphoanatomy of the underground system of Androtrichum trigynum (Cyperaceae)

Rodriguésia ◽  
2012 ◽  
Vol 63 (2) ◽  
pp. 305-319
Author(s):  
Roberta Andressa Pereira ◽  
Ana Claudia Rodrigues
Keyword(s):  
Adventitious Roots ◽  
Atlantic Coast ◽  
Root Apex ◽  
Southwestern Atlantic ◽  
Coastal Regions ◽  
Outer Cortex ◽  
Anatomical Features ◽  
Thin Walls ◽  
Intercalary Meristem ◽  
Underground System

Androtrichum has only one species, A. trigynum (Spr.) Pfeiffer, occurring in coastal regions of the southwestern Atlantic coast. It presents an underground system consisting of rhizomes and adventitious roots. The rhizome is thickened, plagiotropic, sympodial, and floral scapes and roots arise from it. From the stem promeristem, the protoderm, procambium and ground meristem are differentiated. At the apex region, the intercalary meristem and primary thickening meristem (PTM) are observed. The adventitious roots originate from the PTM, and present root apex with closed organization. The young epidermis has papillose cells, and meristematic endoderm activity is observed. In a mature root, the outer cortex, or hypodermis, and the internal cortex can be identified. The endoderm presents radially elongated cells with thin walls and the pericycle is biseriate. The anatomical features observed in the present study are found in other species of Cyperaceae and some xeromorphic characters can be identified.

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