Biometric relationships of the Argentinean prawn Artemesia longinaris (Decapoda: Penaeidae) in the south-western Atlantic

2010 ◽  
Vol 90 (7) ◽  
pp. 1385-1393 ◽  
Author(s):  
L.F.C. Dumont ◽  
F. D'Incao
Keyword(s):  
Population Structure ◽  
Marked Reduction ◽  
The Other ◽  
Distribution Area ◽  
Southern Brazil ◽  
Simple Linear Regression ◽  
The South ◽  
Western Atlantic ◽  
Relative Growth ◽  
Autumn And Winter

Biometric relationships of size and weight were estimated for the Argentinean prawn (Artemesia longinaris), a new commercial penaeid prawn exploited in the south-western Atlantic. Morphometric and meristic traits were used to elucidate population structure of this species along its distribution area. The morphological relationships were estimated by a simple linear regression, considering total length (TL) as the dependent variable. The males collected in southern Brazil, an area under influence of the Subtropical Convergence, presented a slightly lower TL increment than females. A marked reduction in slopes of males between populations from southern Brazil was observed in autumn and winter. Additionally, relative growth in length of males from Argentina is similar to that observed during autumn and winter in southern Brazil. The other morphometric and meristic variables used also indicated higher similarities between southern Brazil and Argentina, which may be explained by relative growth associated to water temperatures or migration during winter, taking advantage of the oceanographic systems connecting both sites. Moreover, the population from Rio de Janeiro seems morphologically apart from the others, forming a separate unit stock.

Distribution and population structure of the pelagic stingray,Pteroplatytrygon violacea(Dasyatidae), in the south-western Atlantic

2008 ◽  
Vol 21 (4) ◽  
pp. 357-363 ◽  
Author(s):  
Rodrigo Forselledo ◽  
Maite Pons ◽  
Philip Miller ◽  
Andrés Domingo
Keyword(s):  
Population Structure ◽  
The South ◽  
Western Atlantic

Population structure of Squatina guggenheim (Squatiniformes, Squatinidae) from the south-western Atlantic Ocean

2014 ◽  
Vol 86 (1) ◽  
pp. 186-202 ◽  
Author(s):  
G. Garcia ◽  
S. Pereyra ◽  
V. Gutierrez ◽  
S. Oviedo ◽  
P. Miller ◽  
...  
Keyword(s):  
Population Structure ◽  
Atlantic Ocean ◽  
The South ◽  
Western Atlantic ◽  
Western Atlantic Ocean

Acanthurus tractus Poey, 1860, a valid western Atlantic species of surgeonfish (Teleostei, Acanthuridae), distinct from Acanthurus bahianus Castelnau, 1855

Zootaxa ◽  
2011 ◽  
Vol 2905 (1) ◽  
pp. 63 ◽  
Author(s):  
MOISÉS A. BERNAL ◽  
LUIZ A. ROCHA
Keyword(s):  
Distinct Species ◽  
South Atlantic ◽  
Genetic Differences ◽  
Southern Brazil ◽  
The South ◽  
Caudal Fin ◽  
Western Atlantic ◽  
Dorsal Fin ◽  
Bright Yellow ◽  
Central Atlantic

The ocean surgeonfish, Acanthurus bahianus, has been historically recorded from Bermuda and Massachusetts to southern Brazil and the islands of the central Atlantic. We have found that individuals in the southwestern and central Atlantic consistently have a posterior bright yellow margin on the caudal fin and an orange/red margin on the dorsal fin. This coloration is different from the characteristic white/blue fin margins on individuals from the northwestern Atlantic. In addition, there is a clear genetic distinction (d= 2.4% mtDNA, CytB) between these two lineages. With the corroborating coloration and genetic differences, we suggest that these two lineages represent distinct species. The South Atlantic species retains the name of A. bahianus and we propose to resurrect A. tractus (Poey 1860) as the valid name for the northwestern Atlantic species.

Behaviour and daily activity of the squirrel Sciurus ingrami in a secondary araucaria forest in southern Brazil

2000 ◽  
Vol 78 (10) ◽  
pp. 1732-1739 ◽  
Author(s):  
Marcelo Bordignon ◽  
Emygdio LA Monteiro-Filho
Keyword(s):  
The Other ◽  
Southern Brazil ◽  
Mating Period ◽  
Araucaria Forest ◽  
Morning Peak ◽  
The Mean ◽  
Two Peaks ◽  
Autumn And Winter ◽  
Number Of Males ◽  
Daily Time

A study on the behaviour of a population of squirrels, the "serelepe" (Sciurus ingrami), was conducted in a secondary araucaria forest in southern Brazil. Forty-three squirrels were marked and observed between 05:00 and 18:00 daily. The largest number of males were trapped during the winter, coinciding with an increase in the number of agonistic encounters and mating chases. Two peaks in occurrence of trapped pregnant females were found, one during the winter and the other in the summer. The population density was 0.89 squirrels/ha and the mean area occupied by males was larger during the winter mating period, decreasing gradually during subsequent seasons. The diurnal activity of S. ingrami exhibited bimodal curves in all seasons, with one peak in the morning and another in the afternoon. During the winter, the morning peak was greater in amplitude than during the other seasons. In the spring and summer, a marked increase in the activity of the squirrels during the hottest hours occurred. The morning peak of activity occurred earlier in the spring and summer and later in the autumn and winter. The daily time spent inrest, displacement, feeding, and maintenance showed seasonal variation similar to that shown by other sciurids.

Rough-toothed dolphins (Cetartiodactyla: Delphinidae) habitat use in coastal urban waters of the South-western Atlantic

2020 ◽  
Vol 100 (3) ◽  
pp. 471-479 ◽  
Author(s):  
Liliane Lodi ◽  
Guilherme Maricato
Keyword(s):  
Home Range ◽  
Habitat Use ◽  
Coastal Waters ◽  
Rio De Janeiro ◽  
The South ◽  
Western Atlantic ◽  
Regional Collaboration ◽  
Low Degree ◽  
Anthropogenic Threats ◽  
Autumn And Winter

AbstractRough-toothed dolphins (Steno bredanensis) are regularly present in continental shelf areas of the South-western Atlantic. However, there is little information on the natural history and ecology of these delphinids. This study evaluated the occurrence, habitat use and individual movements of the species in coastal waters off Rio de Janeiro, south-eastern Brazil. Data were obtained from boat surveys between August 2011 and May 2018, during which rough-toothed dolphins were sighted in 21 distinct events, predominantly in autumn and winter. The mean group size was 29 individuals. Rough-toothed dolphins were usually recorded 130 to 2300 m from the coast, between 7.6 and 28 m depths. In total, 115 individuals were catalogued through dorsal fin marks and 61 (53%) were resighted between one (47.5%) and four (9.8%) occasions. The interval between resightings ranged from seven to 2087 days (mean = 268). Agglomerative hierarchical clustering indicated 30 individuals (49.2%) in low degree, 12 (19.7%) in medium degree and 19 (31.1%) in high degree of site fidelity. Dolphins showed a higher frequency of low degree of habitat use, despite the presence of multiyear recaptures, which may be related to the prevalence of dolphin occurrence in autumn and winter, a large home range and/or the abundance and distribution of food resources. Dedicated surveys and regional collaboration are needed to evaluate the home range and population status of this species for their effective conservation. Our findings enhanced knowledge of this little studied species facing increasing anthropogenic threats in coastal waters off Rio de Janeiro.

Some Aspects of the Biology of the Sandeel, Ammodytes Tobianus L., in Langstone Harbour, Hampshire

1973 ◽  
Vol 53 (2) ◽  
pp. 325-346 ◽  
Author(s):  
P. J. Reay
Keyword(s):  
Population Structure ◽  
Species Composition ◽  
Seasonal Pattern ◽  
The Other ◽  
South Coast ◽  
Seasonal Growth ◽  
Otolith Growth ◽  
The South ◽  
Calculation Technique ◽  
Back Calculation

This paper is concerned with the biology of the sandeel, Ammodytes tobianus L., in Langstone Harbour, Hampshire; this was the main area studied in a survey of sandeel populations which are exploited for bait along the south coast of England. Aspects considered are the relative occurrence of the spawning groups; spawning seasons; population structure in terms of length, sex, age and maturity; mortality; annual growth; seasonal growth; and condition. The seasonal pattern of otolith growth and its application to the back-calculation technique, has been described elsewhere (Reay, 1972).A. tobianus forms over 95% of the total sandeel catch in Langstone Harbour. Hyperoplus lanceolatus (Le Sauvage) is the only other species to occur regularly, but individuals of the three other British species, A. marinus Raitt, H. immaculatus (Corbin), and Gymnammodytes semisquamatus (Jourdain), have also been recorded. This pattern of species composition is also found in the other inshore areas studied along the south coast.

Parasites as indicators of fish population structure at two different geographical scales in contrasting coastal environments of the south-western Atlantic

2019 ◽  
Vol 229 ◽  
pp. 106400 ◽  
Author(s):  
Eugenia Levy ◽  
Delfina Canel ◽  
M. Alejandra Rossin ◽  
Jesús S. Hernández-Orts ◽  
Mariano González-Castro ◽  
...  
Keyword(s):  
Population Structure ◽  
Fish Population ◽  
Coastal Environments ◽  
The South ◽  
Western Atlantic ◽  
Fish Population Structure

Personal Discernment and Dialogue. Learning from ‘the Other’

2020 ◽  
Vol 12 (4) ◽  
pp. 27
Author(s):  
Michael Barnes SJ
Keyword(s):  
The Other ◽  
Local Culture ◽  
Society Of Jesus ◽  
Spiritual Exercises ◽  
The South ◽  
Ignatian Spirituality ◽  
Michel De Certeau ◽  
Personal Interactions ◽  
Ignatius Of Loyola

This article considers the theme of discernment in the tradition of Ignatian spirituality emanating from the Spiritual Exercises of St Ignatius of Loyola (1491-1556), the founder of the Society of Jesus (Jesuits). After a brief introduction which addresses the central problematic of bad influences that manifest themselves as good, the article turns to the life and work of two Jesuits, the 16th C English missionary to India, Thomas Stephens and the 20th C French historian and cultural critic, Michel de Certeau. Both kept up a constant dialogue with local culture in which they sought authenticity in their response to ‘events’, whether a hideous massacre which shaped the pastoral commitment and writing of Stephens in the south of the Portuguese enclave of Goa or the 1968 student-led protests in Paris that so much affected the thinking of de Certeau. Very different in terms of personal background and contemporary experience, they both share in a tradition of discernment as a virtuous response to what both would understand as the ‘wisdom of the Spirit’ revealed in their personal interactions with ‘the other’.

The Fable of the Writer in Southern Fiction

Prospects ◽  
1982 ◽  
Vol 7 ◽  
pp. 249-266
Author(s):  
Lewis P. Simpson
Keyword(s):  
The Other ◽  
Deep South ◽  
The South ◽  
Southern Fiction ◽  
Yoknapatawpha County ◽  
The One

No scene in Faulkner is more compelling than the one that transpires on a “long still hot weary dead September afternoon” in Yoknapatawpha County, Mississippi, toward the end of the first decade of this century. Quentin Compson sits with Miss Rosa Coldfield in a “dim airless room” still called “the office because her father called it that,” and listens to Miss Rosa tell her version of the story of the “demon” Sutpen and his plantation, Sutpen's Hundred. As she talks “in that grim haggard amazed voice”—“vanishing into and then out of the long intervals like a stream, a trickle running from patch to patch of dried sand”—the 22-year-old Mississippi youth discovers he is hearing not Miss Rosa but the voices of “two separate Quentins.” One voice is that of the “Quentin preparing for Harvard in the South, the deep South dead since 1865 and peopled with garrulous baffled ghosts.” The other voice is that of the Quentin “who was still too young to deserve yet to be a ghost, but nevertheless having to be one for all that, since he was born and bred in the deep South the same as she [Miss Rosa] was.” The two Quentins talk “to one another in the long silence of notpeople, in notlanguage: It seems that this demon—his name was Sutpen—(Colonel Sutpen)—Colonel Sutpen. Who came out of nowhere and without warning upon the land with a band of strange niggers and built a plantation”.

Sign in / Sign up

Export Citation Format

Share Document