Synoptic oceanography of San Jorge Gulf (Argentina): A template for Patagonian red shrimp (Pleoticus muelleri) spatial dynamics

The clam Neilonella sulculata in San Jorge Gulf (Argentina, Southwest Atlantic): spatial distribution pattern and inverse relationship between size and density

“…We found a clear north-south increase in density and biomass of N. sulculata, with minimum and maximum values in areas N and S, respectively. This may be related to the availability of food, since Fernández et al (2008) found that the horizontal distribution of chlorophyll-a in bottom water was characterized by minimum values towards the central area and maximum concentrations in the southern sector of San Jorge Gulf, which may be caused by a thermohaline frontal system associated with windrelated upwelling recently detected near its southern coastal area (Glembocki et al 2015). The role of upwelling may be crucial for the recruitment and larval dispersion of benthic invertebrate populations (e.g.…”

“…The positive autocorrelation displayed at scales ranging from the smallest sampling interval (∼ 1.7 km) up to 14-17 km is related with the clear-cut north-south gradient observed in this population. Food availability might be regarded as the most likely environmental factor generating this pattern, as N. sulculata density and biomass increase with decreasing distances to the thermohaline frontal system having its maximum expression during the winter near the southern coast of San Jorge Gulf (Glembocki et al 2015).…”

“…Juveniles of the clam Neilonella sulculata (Gould, 1852) have also been found among the food items consumed by the red shrimp, Pleoticus muelleri (Spence Bate, 1888) (Roux et al 2009). Due to the great ecological and economic importance of this gulf, a detailed cartography of its sediments (Fernández et al 2003), an oceanographic synopsis (Glembocki et al 2015), and a physico-chemical characterization of its benthic environment have been published (Fernández et al 2005(Fernández et al , 2007(Fernández et al , 2008.…”

New record of Scomberesox scombroides (Richardson, 1843) (Beloniformes: Scomberesocidae) in southwestern waters of Patagonia and an update on its geographic distribution on the Argentine continental shelf

“…This is consistent with the findings of Dudnik (), who hypothesized that this species could reach a further southern distribution in the Southwest Atlantic caused by the extension of the Brazil Current waters, possibly enabling this sub‐tropical species to persist at latitudes further south than their normal range. In addition, in the area in front of the San Jorge Gulf where the S. scombroides was registered, there is a frontal tide that originates in a zone of heightened biological productivity (Glembocki, Williams, Góngora, Gagliardini, & Orensanz, ); this phenomenon would thus be a decisive factor in the distribution of the species (Berruti, ).…”

“…The presence of S. scombroides in temperate-cold waters of Patagonia is possibly due to the generation of anticyclonic frontal vortices as an extension of the Brazil Current in which southward displacement leads to the transport of this species out of its subtropical zone. Konstantinova, Remeslo, and Fedulop (1994) Gulf where the S. scombroides was registered, there is a frontal tide that originates in a zone of heightened biological productivity (Glembocki, Williams, Góngora, Gagliardini, & Orensanz, 2015); this phenomenon would thus be a decisive factor in the distribution of the species (Berruti, 1988).…”