Do individual seabirds specialize in fisheries' waste? The case of black-browed albatrosses foraging over the Patagonian Shelf

2013 ◽  
Vol 17 (1) ◽  
pp. 19-26 ◽  
Author(s):  
J. P. Granadeiro ◽  
P. Brickle ◽  
P. Catry
Keyword(s):  
Patagonian Shelf ◽  
Fisheries Waste

The variability of sea surface temperature in the Patagonian Shelf Argentina, from 35 years of satellite information

2021 ◽  
Vol 42 (16) ◽  
pp. 6092-6108
Author(s):  
Lucrecia Allega ◽  
Juan Pablo Pisoni ◽  
Ezequiel Cozzolino ◽  
Reinaldo Agustín Maenza ◽  
María Cintia Piccolo
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Sea Surface ◽  
Patagonian Shelf ◽  
Satellite Information

Chemically unidentified dissolved organic carbon: a pivotal piece for microbial activity in a productive area of the Northern Patagonian Shelf

2021 ◽  
pp. 105286
Author(s):  
John E. Garzón-Cardona ◽  
Valeria A. Guinder ◽  
Cecilia Alonso ◽  
Ana M. Martínez ◽  
Silvio Pantoja ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Microbial Activity ◽  
Patagonian Shelf ◽  
Productive Area

scholarly journals FEEDING AND REPRODUCTIVE ACTIVITY OF THE COPEPODS Drepanopus forcipatus AND Calanus australis DURING LATE SUMMER ON THE SOUTHERN PATAGONIAN SHELF (ARGENTINA, 47°-55°S)

2014 ◽  
Vol 62 (4) ◽  
pp. 295-314 ◽  
Author(s):  
Julieta Carolina Antacli ◽  
Marina E. Sabatini ◽  
Ricardo I. Silva ◽  
Daniel R. Hernández ◽  
Andrés J. Jaureguizar ◽  
...  
Keyword(s):  
Diet Composition ◽  
Feeding Activity ◽  
Food Pellet ◽  
Late Summer ◽  
Reproductive Activity ◽  
Seasonal Temperature ◽  
Patagonian Shelf ◽  
Adult Females ◽  
Female Reproductive Status ◽  
Potential Food

Drepanopus forcipatus and Calanus australis are key planktonic copepods on the southern Patagonian shelf. Their feeding and reproductive patterns and population status were investigated during late summer, when environmental conditions may be critical. The presence of food in the gut and food-pellet length were recorded in adult females and the most abundant copepodite stages. Diet composition was also studied in adult females. Female reproductive status was evaluated by gonad staging. Despite generally low feeding conditions and decreasing seasonal temperature, both copepods fed to some degree. The most numerous copepodites and adult females of both species showed similarly low feeding activity. About half of the adult females of the two species and C5s of C. australis contained food in their guts, but the proportion of fed C4-females of D. forcipatus was much lower. All copepods were generally feeding at low or intermediate levels. Gonad stage distribution and population structure showed low but still ongoing reproduction in both species. Gut content findings suggest a preference for smaller nanoplanktonic particles, especially dinoflagellates by D. forcipatus, and for autotrophic prey, particularly large diatoms by C. australis. The feeding and reproduction patterns of the two copepods were likely influenced by the distributions of potential food resources and temperature.

Internal solitary waves from L-band SAR over the Argentine inner Patagonian shelf

2020 ◽  
Vol 11 (6) ◽  
pp. 525-534
Author(s):  
Juan P. Pisoni ◽  
Nora G. Glembocki ◽  
Silvia I. Romero ◽  
Mariano H. Tonini
Keyword(s):  
Solitary Waves ◽  
Internal Solitary Waves ◽  
Patagonian Shelf ◽  
L Band

scholarly journals Scavenger communities and fisheries waste: North Sea discards support 3 million seabirds, 2 million fewer than in 1990

2019 ◽  
Vol 21 (1) ◽  
pp. 132-145 ◽  
Author(s):  
Richard B. Sherley ◽  
Hannah Ladd‐Jones ◽  
Stefan Garthe ◽  
Olivia Stevenson ◽  
Stephen C. Votier
Keyword(s):  
North Sea ◽  
Fisheries Waste

Phytoplankton community during a coccolithophorid bloom in the Patagonian Shelf: microscopic and high-performance liquid chromatography pigment analyses

2011 ◽  
Vol 92 (1) ◽  
pp. 13-27 ◽  
Author(s):  
Márcio Silva de Souza ◽  
Carlos Rafael Borges Mendes ◽  
Virgínia Maria Tavano Garcia ◽  
Ricardo Pollery ◽  
Vanda Brotas
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Phytoplankton Community ◽  
Sampling Period ◽  
Emiliania Huxleyi ◽  
Patagonian Shelf ◽  
Phaeocystis Antarctica ◽  
Hplc Data ◽  
Phytoplankton Group

We describe the phytoplankton community and biomass during a summer coccolithophorid bloom sampled over the Patagonian shelf (48.5°S–50.5°S). Those phytoplankton species can contribute to the flux of calcium carbonate out of surface waters. Results from both microscope and high-performance liquid chromatography (HPLC) analysis are shown to complement information on the phytoplankton community. From CHEMTAX analysis of HPLC data, the most important organisms and groups identified were the coccolithophorid Emiliania huxleyi, the haptophyte Phaeocystis antarctica, dinoflagellates, diatoms, cryptophytes, prasinophytes and cyanobacteria. Phytoplankton microscope counts were converted into phytoplankton group-specific biovolume estimates. Although some microscope-identified taxa could not be determined by CHEMTAX, e.g. the autotrophic ciliate Myrionecta rubra, cluster analyses from both techniques showed similar results for the main groups. Both Emiliania huxleyi cell concentration and biomass, and the pigment 19′-hexanoyloxyfucoxanthin were the most important biological features during the sampling period. At surface, nitrate was moderately high (0.2–4.2 µM) in coccolithophorid-dominated samples, whereas phosphate (<0.33 µM) and silicate (<1.35 µM) concentrations were low. Among the environmental factors low Si:N ratios were mainly associated with the dominance of E. huxleyi. Competition and probably differential grazing could also promote a coccolithophorid outgrowth over other photoautotrophs during the summer season in the Patagonian shelf.

scholarly journals Feeding the world: what role for fisheries?

2012 ◽  
Vol 69 (2) ◽  
pp. 145-150 ◽  
Author(s):  
Chris L. J. Frid ◽  
Odette A. L. Paramor
Keyword(s):  
Dietary Protein ◽  
Marine Science ◽  
Efficient Utilization ◽  
Fish Stocks ◽  
Population Peak ◽  
The World ◽  
Fisheries Waste ◽  
Global Population

Abstract Frid, C. L. J., and Paramor, O. A. L. 2012. Feeding the world: what role for fisheries? – ICES Journal of Marine Science, 69: 145–150. Fisheries (wild capture and aquaculture) deliver more than 110 million tonnes of food and around 15% of the dietary protein to the 7 billion people currently living on the planet. With the global population expected to peak at 9 billion by 2050, and >80% of global fish stocks currently fully or overexploited (and aquaculture is at least in part dependent on capture fisheries), the contribution of fisheries looks set to decline. The challenge is therefore determining how better management, an ecosystem perspective, and more efficient utilization of fisheries waste can support fisheries products continuing to contribute significantly to “feeding the world” up to and beyond the population peak.

Numerical modelling of the M2 tide on the northern Patagonian Shelf

1994 ◽  
Vol 14 (2-3) ◽  
pp. 267-278 ◽  
Author(s):  
P.D. Glorioso ◽  
J.H. Simpson
Keyword(s):  
Numerical Modelling ◽  
Patagonian Shelf
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