Ontogenetic diet shifts of rough scad Trachurus lathami in the North Patagonian shelf (South West Atlantic Ocean)

2021 ◽  
Author(s):  
Brenda Temperoni ◽  
Santiago Aldo Barbini ◽  
Paula Orlando ◽  
Claudio César Buratti
Keyword(s):  
Atlantic Ocean ◽  
Patagonian Shelf ◽  
The North ◽  
Ontogenetic Diet Shifts ◽  
South West ◽  
Diet Shifts

scholarly journals Spatio-temporal variation in mortality rates of White-chinned Petrels Procellaria aequinoctialis interacting with longliners in the south-west Atlantic

2007 ◽  
Vol 17 (4) ◽  
pp. 359-366 ◽  
Author(s):  
Agustina Gómez Laich ◽  
Marco Favero
Keyword(s):  
Full Moon ◽  
Capture Rate ◽  
Mortality Rates ◽  
The South ◽  
Patagonian Shelf ◽  
The North ◽  
South West ◽  
Procellaria Aequinoctialis ◽  
Spatio Temporal ◽  
Capture Rates

AbstractThe White-chinned Petrel Procellaria aequinoctialis is the second most commonly captured species by Argentinean longliners. The severe declines that this species has experienced in some of its populations (e.g. South Georgia Islands) have been principally attributed to incidental mortality associated with longliners. In this study we analyse the spatio-temporal variability in the mortality rates of White-chinned Petrels on the Patagonian Shelf and the effects that environmental and operational variability have on such mortality. The average capture rate (± 1 SD) for the period 1999–2003 was 0.014 ± 0.090 White-chinned Petrels for every 1,000 hooks deployed. Higher capture rates were observed when short longlines were deployed. Capture rates were not affected by the wind speed or by the time to the full moon. The distribution of the captures differed throughout the year. During autumn–winter most captures took place in the north of the Patagonian Shelf, whereas during spring–summer incidental captures occurred principally to the south between 45°S and 50°S.ResumoEl Petrel Barba Blanca Procellaria aequinoctialis constituye la segunda especie más frecuentemente capturada por la flota palangrera Argentina. Los importantes decrecimientos poblacionales observados en algunas poblaciones de esta especie (e.g. Islas Georgias del Sur) han sido principalmente atribuidos a la mortalidad incidental asociada a embarcaciones palangreras. En este trabajo se analizó la variación espacio- temporal en las tasas de captura incidental del Petrel Barba Blanca a lo largo de la Plataforma Continental Argentina y se estudió el efecto que diferentes variables ambientales y operacionales tienen sobre la mortalidad incidental de esta especie. La tasa de captura promedio (± d.s) durante el periodo 1999–2003 fue de 0.014 ± 0.090 Petreles Barba Blanca cada 1.000 anzuelos. Mayores tasas de captura fueron registradas al utilizar palangres cortos. No se observó un efecto de la intensidad del viento ni de la distancia a la luna llena sobre las tasas de captura. La distribución de las capturas difirió a lo largo del aão. Durante el otoão-invierno la mayoría de las capturas estuvieron localizadas al norte de la Plataforma Continental Argentina, mientras que durante los meses de primavera-verano las capturas estuvieron localizadas principalmente entre los 45°S y 50°S.

Abyssocladia vaceleti (Porifera, Cladorhizidae): a new deep-sea carnivorous sponge from Patagonia

Zootaxa ◽  
2018 ◽  
Vol 4466 (1) ◽  
pp. 164 ◽  
Author(s):  
PILAR RÍOS ◽  
JAVIER CRISTOBO
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Deep Sea ◽  
Falkland Islands ◽  
The South ◽  
The North ◽  
South West ◽  
Sw Atlantic ◽  
A New Species

This study describes a new species of carnivorous sponge (Family Cladorhizidae) collected in Patagonia, SW Atlantic, off Argentinean waters and the North of the Falkland Islands (Malvinas). The species described here, belongs to the genus Abyssocladia and was collected by dredging and trawling during IEO (Spanish Institute of Oceanography) cruises in the South West Atlantic Ocean from 2007 to 2010 under the Atlantis Project. Abyssocladia vaceleti sp. nov. is characterised by the possession of a long peduncle and flat body with bilaterally symmetrical and apical filaments with a skeleton of tornotes (often polytylotes), styles, abyssochelae, arcuate chelae, sigmancistras and acanthotylostrongyles. This species lives at depths of 901–1547 m. 

Taxonomy and biogeography of the genus Heteroteuthis (Mollusca: Cephalopoda) in the Atlantic Ocean

2010 ◽  
Vol 90 (2) ◽  
pp. 367-390 ◽  
Author(s):  
Natalie Rotermund ◽  
Jürgen Guerrero-Kommritz
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic ◽  
North Atlantic Ocean ◽  
South Atlantic Ocean ◽  
Full Description ◽  
The South ◽  
The North ◽  
South West ◽  
The North Atlantic ◽  
Definition Of

Two species of the bobtail squid Heteroteuthis are reported from the Atlantic Ocean, H. dispar in the North Atlantic Ocean and H. dagamensis in the South Atlantic Ocean. In total 58 individuals were examined, 23 belonging to the species Heteroteuthis dispar and 35 belonging to the species H. dagamensis. All specimens were captured during the Walther Herwig Expeditions 1966, 1968, 1976 and 1982. A full description of both sexes of H. dispar and H. dagamensis is provided. These two species can only be distinguished by means of the male's enlarged suckers on arm pair III. Females are not useful for taxonomic identifications and are morphologically identical in both species. The results do not support the definition of subgenera in this genus. This is the first report for Heteroteuthis dagamensis in the South-West Atlantic Ocean.

scholarly journals 1. Exploration of the Faroe Channel, during the Summer of 1880, in H.M.'s hired ship “Knight Errant.”

1882 ◽  
Vol 11 ◽  
pp. 638-720 ◽  
Author(s):  
Tizard ◽  
John Murray
Keyword(s):  
Atlantic Ocean ◽  
Faroe Islands ◽  
Orkney Islands ◽  
Basaltic Rocks ◽  
The North ◽  
South West

The region known as the Faroe Channel is that portion of the Atlantic Ocean to the north of the mainland of Scotland, which is bounded on the N.W. by the Faroe Islands, with their south-west-ward extending fishing-banks, and on the S.E. and S. by the Shetland and Orkney Islands, the shores of Caithness and Sutherland, and the Hebrides.The Faroe Islands are composed of basaltic rocks, while the north of Scotland, and the Scottish Islands, are chiefly made up of Laurentian gneiss, Silurian, and Devonian rocks.

Stanowiska reliktowego gatunku Betula humilis (Betulaceae) w Dolinie Górnego Nurca na Nizinie Północnopodlaskiej

2019 ◽  
pp. 161-168
Author(s):  
Aleksander Kołos
Keyword(s):  
Drainage Ditches ◽  
North West ◽  
Hay Meadows ◽  
The North ◽  
South West ◽  
North Eastern ◽  
New Localities ◽  
Western Border ◽  
Betula Humilis ◽  
Trees And Shrubs

Betula humilis Schrank (shrubby birch) is among the most endangered shrub species in Poland. All localities are in the eastern and northern parts of the country, where the species reaches the western border of its geographical range in Europe. Betula humilis is disappearing in Poland due to wetland melioration and shrub succession. Over 80% of the localities described in Poland have not been confirmed in the last 20 years. Five new localities of B. humilis in the North Podlasie Lowland were recorded from 2008 to 2019 in the Upper Nurzec Valley (Fig. 1): 1–1.5 km south-west of Pawlinowo village (in the ATPOL GC7146 plot) and 1.5–2 km north-west of Żuki village (ATPOL GC7155, GC156 and GC166). The population near Pawlinowo (locality 1) is currently composed of ~80 individuals (101 individuals were noted in 2010) and is one of the largest populations in north-eastern Poland. Betula humilis grows there within patches dominated by Salix rosmarinifolia and megaforbs. The population at locality 5 is composed of 18 individuals. At the remaining localities, only 1–4 individuals were found, scattered along drainage ditches surrounded by hay meadows. At some of these localities the species is threatened with extinction. It is suggested to remove competitive trees and shrubs (mainly Populus tremula, Betula pubescens and Salix cinerea) in order to maintain the local populations.

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