Coastal oceanographic regimes of the Northern Argentine Continental Shelf (34–43°S)

Lucas, Andrew J.; Guerrero, Ricardo; Mianzán, Hermes; Marcelo, Eduardo; Lasta, Carlos A.

doi:10.1016/j.ecss.2005.06.015

Cited by 167 publications

(192 citation statements)

References 21 publications

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“…Between the coastal and shelf waters, a saline front oriented meridionally to the coastline separates LSCW from an area with a salinity maximum (Saline Front Waters, SFW) (Guerrero, 1998;Lucas et al, 2005;Martos et al, 2005;Auad and Martos, 2012). This salinity maximum originates in the San Matías Gulf (SMG), due to the dominance of evaporation over precipitation (Lucas et al, 2005). The most external sector corresponds to a second, weaker front to the east of the absolute salinity maximum, resulting from its meeting with relatively cooler shelf waters of intermediate salinity (Middle Shelf Waters, MSW) advected from the south.…”

Section: Field Situationmentioning

confidence: 99%

“…2B). Such a seasonal stratification has been ascribed to heating of the superficial water during the Austral spring such that it reaches the inner zone (with only 30-40 m water depth) at 50 km from the coast (Lucas et al, 2005). It probably is responsible for creating environmental conditions that favour dinoflagellate blooms (Smayda, 1997).…”

Section: Field Situationmentioning

confidence: 99%

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Azadinium poporum from the Argentine Continental Shelf, Southwestern Atlantic, produces azaspiracid-2 and azaspiracid-2 phosphate

et al. 2016

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Section: Field Situationmentioning

confidence: 99%

Section: Field Situationmentioning

confidence: 99%

Azadinium poporum from the Argentine Continental Shelf, Southwestern Atlantic, produces azaspiracid-2 and azaspiracid-2 phosphate

et al. 2016

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“…1). This is a zone where salinity varies between 32.6 and 34.6 (Martos et al, 2004), and temperature ranges from 8ºC-10ºC in winter and 11-14ºC in spring (Guerrero, Piola, 1997;Lucas et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

Reproductive biology of the cockfish, Callorhinchus callorynchus (Chondrichthyes: Callorhinchidae), in coastal waters of the northern Argentinean Sea

et al. 2017

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The cockfish, Callorhinchus callorynchus, is a widely distributed holocephalan in the south-western Atlantic and an important resource for Argentinean fisheries. The reproductive characteristics of this species were studied in northern Argentinean coastal waters, where specimens arrive seasonally (winter-spring). Sexual dimorphism in maximum precaudal length (PCL) and total body mass (TM) was found, being females (PCL=630 mm; TM=3330 g; n=167) larger and heavier than males (PCL=482 mm; TM=1630 g; n=19). Maturity size for females was 466.22 mm PCL, representing 74% PCL of the largest female sampled. The mean number of ovarian follicles was 8.37 (± 4.84). The highest values of ovarian follicles diameter, gonadosomatic and oviducalsomatic indices were found in spring. A high proportion of mature females (44%) had atretic ovarian follicles, suggesting that they were in the resting stage of their reproductive cycle. The low number of mature males recorded and the absence of mature females with spermatophore masses or egg cases indicate that the study area would not be a reproductive zone. The seasonal presence of C. callorynchus in this region could be related to trophic movements. These results, obtained in an area with high fishing pressure on chondrichthyans, will be useful for implementing conservation and management measures.Keywords: Holocephalans, Maturity, Ovarian fecundity, Seasonality, South-western Atlantic.El pez gallo, Callorhinchus callorynchus, es un holocéfalo con amplia distribución en el Atlántico Sudoccidental y un recurso importante para las pesquerías en Argentina. Las características reproductivas de esta especie fueron estudiadas en aguas costeras al norte del Mar Argentino, adonde se acercan estacionalmente (invierno-primavera). Se observó dimorfismo sexual en los valores máximos de longitud precaudal (LPC) y masa corporal total (MT), siendo las hembras (LPC=630 mm; MT=3330 g; n=167) más grandes y pesadas que los machos (LPC=482 mm; MT=1630 g; n=19). La talla de maduración para las hembras fue de 466,22 mm LPC, representando el 74% de la LPC máxima observada. El número promedio de folículos ováricos fue 8,37 (± 4,84). Los valores más altos del diámetro de los folículos ováricos, índice de la glándula oviductal e índice gonadosomático fueron hallados durante primavera. Una gran proporción de hembras maduras (44%) presentaron folículos ováricos atrésicos, sugiriendo que se encontraban en la etapa de reposo de su ciclo reproductivo. El bajo número de machos maduros registrados y la ausencia de hembras maduras con espermatóforos o cápsulas de huevos indican que las aguas costeras del norte de Argentina no serían una zona reproductiva. La presencia de C. callorynchus en el área de estudio podría estar relacionada con movimientos tróficos. Los resultados, obtenidos en un área con una gran presión pesquera sobre los condrictios, serán útiles para implementar adecuados planes de manejo y conservación de esta especie.

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“…The occasional presences of tropical and subtropical fishes in Argentinean waters are well documented in the literature (Cousseau and Figueroa, 1989;Díaz de Astarloa and Figueroa, 1995;Díaz de Astarloa et al, 2000;Figueroa et al, 2000;Rico and Acha, 2003;Scenna et al, 2006;Solari et al, 2010;Spath et al, 2012;Delpiani et al, 2013). The Argentinean marine biogeographic province (Briggs and Bowen, 2012) is characterized by the encounter between the warm, southward-flowing Brazilian Current, and the cold, northward flow, of the Malvinas Current (Figueroa et al, 1998) and water discharge of continental output (Lucas et al, 2005). There is not clear explanation of how tropical and subtropical fish species arrive to the Argentinean province, but Scenna et al (2006) and Seeliger and Odebrecht (1997) proposed that species of tropical and Antarctic waters might appear sporadically because they use the Brazilian and Malvinas currents as transportation.…”

Section: Discussionmentioning

confidence: 76%

First report of the black gemfish Nesiarchus nasutus (Perciformes: Gempylidae) in Argentinean waters

et al. 2015

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The gempylid Nesiarchus nasutus is reported for the first time from Argentinean waters, the southernmost occurrence of the species in the Southwestern Atlantic. This suggests that the fluctuating environmental characteristics of the area would be proper for the presence of tropical and subtropical species.Keywords: southwestern Atlantic, Brazilian current, trichiuroids fish, deep-sea. Primeiro relatório do gemfish preto Nesiarchus nasutus (Perciformes: Gempylidae) em águas argentinas ResumoA ocorrência de Nesiarchus nasutus é registrado pela primeira vez em águas argentinas, sendo a esta ocorrência mais meridional da espécie no Atlântico Sudoeste. Isto sugere que as características ambientais flutuantes da área seriam adequadas para a presença de espécies tropicais e subtropicais na mesma. Palavras-chave:Atlântico ocidental sul, corrente do Brasil, trichiuroidea, águas profundas.

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Coastal oceanographic regimes of the Northern Argentine Continental Shelf (34–43°S)

Cited by 167 publications

References 21 publications

Azadinium poporum from the Argentine Continental Shelf, Southwestern Atlantic, produces azaspiracid-2 and azaspiracid-2 phosphate

Azadinium poporum from the Argentine Continental Shelf, Southwestern Atlantic, produces azaspiracid-2 and azaspiracid-2 phosphate

Reproductive biology of the cockfish, Callorhinchus callorynchus (Chondrichthyes: Callorhinchidae), in coastal waters of the northern Argentinean Sea

First report of the black gemfish Nesiarchus nasutus (Perciformes: Gempylidae) in Argentinean waters

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