scholarly journals Evidence of a landlocked reproducing population of the marine pejerrey Odontesthes argentinensis (Actinopterygii; Atherinopsidae)

2019 ◽  
Vol 96 (1) ◽  
pp. 202-216 ◽  
Author(s):  
Darío C. Colautti ◽  
Leandro Miranda ◽  
Mariano Gonzalez‐Castro ◽  
Vanina Villanova ◽  
Carlos A. Strüssmann ◽  
...  
Keyword(s):  
Odontesthes Argentinensis

Deleterious effects of water-soluble fraction of petroleum, diesel and gasoline on marine pejerrey Odontesthes argentinensis larvae

2010 ◽  
Vol 408 (9) ◽  
pp. 2054-2059 ◽  
Author(s):  
Ricardo Vieira Rodrigues ◽  
Kleber Campos Miranda-Filho ◽  
Emeline Pereira Gusmão ◽  
Cauê Bonucci Moreira ◽  
Luis Alberto Romano ◽  
...  
Keyword(s):  
Soluble Fraction ◽  
Water Soluble ◽  
Water Soluble Fraction ◽  
Odontesthes Argentinensis

scholarly journals Criação de juvenis de peixe-rei (Odontesthes argentinensis) em diferentes taxas de arraçoamento

2006 ◽  
Vol 36 (4) ◽  
pp. 1278-1282 ◽  
Author(s):  
Marcelo Borges Tesser ◽  
Luís André Sampaio
Keyword(s):  
Odontesthes Argentinensis

Este estudo teve como objetivos avaliar os efeitos de diferentes taxas de arraçoamento sobre a sobrevivência e o crescimento de juvenis do peixe-rei (Odontesthes argentinensis). Juvenis de peixe-rei (100mg) foram estocados na densidade 10 peixes L-1, em tanques circulares de 50L. Foram testadas cinco taxas de alimentação (4, 8 12, 16 e 20% do peso vivo diário) em duplicata durante 30 dias, mais um controle negativo no qual os peixes não foram alimentados. Durante o experimento, a temperatura foi de 23°C, a salinidade 26‰ e a água foi constantemente aerada. A mortalidade total dos peixes mantidos em jejum foi observada após 20 dias de criação; entretanto, não foi verificada diferença significativa de sobrevivência entre os peixes submetidos aos demais tratamentos até o final do experimento, pois a mortalidade foi inferior a 10%, independentemente da taxa de arraçoamento testada. Pelos resultados da regressão polinomial quadrática dos dados de ganho em peso e eficiência alimentar, sugere-se que a taxa de arraçoamento ótima para juvenis de peixe-rei entre 100 e 500mg é igual a 9,0% do peso vivo ao dia.

Survival and Growth of Juvenile Marine Pejerrey, Odontesthes argentinensis, Reared at Different Temperatures

2010 ◽  
Vol 41 (6) ◽  
pp. 931-935 ◽  
Author(s):  
Danilo Pedro Streit ◽  
Marcelo Borges Tesser ◽  
Denílson Burkert ◽  
Cecilia Castaño Sanchez ◽  
Luís André Sampaio
Keyword(s):  
Different Temperatures ◽  
Survival And Growth ◽  
Odontesthes Argentinensis

Habitat use and feeding habits of juvenile fishes in an infrequently flooded Atlantic saltmarsh

2010 ◽  
Vol 61 (10) ◽  
pp. 1154 ◽  
Author(s):  
Macarena Valiñas ◽  
Eduardo M. Acha ◽  
Oscar Iribarne
Keyword(s):  
Tidal Flat ◽  
Prey Availability ◽  
Feeding Habits ◽  
Spartina Densiflora ◽  
Opposite Pattern ◽  
Marsh Creek ◽  
Sw Atlantic ◽  
Micropogonias Furnieri ◽  
Benthic Prey ◽  
Odontesthes Argentinensis

In saltmarshes, marsh creeks provide an important corridor between the marsh and the subtidal habitat for fishes. We compare fish and prey in a Spartina densiflora marsh creek with a tidal flat in the SW Atlantic (Argentina) to evaluate the hypotheses that: (1) benthic prey abundance is higher in the marsh creek, and therefore the abundance of benthivorous fishes and predation pressure on benthos is higher in this area; and (2) marsh creeks act as refuge areas for fishes. Fish abundance and benthic prey availability were sampled over four seasons, and dietary composition of Odontesthes argentinensis and Micropogonias furnieri was assessed. Brevoortia aurea was more abundant in the marsh creek, Micropogonias furnieri showed the opposite pattern, and Odontesthes argentinensis and Ramnogaster arcuata did not dominate either habitat. As expected, smaller fishes were more abundant in the marsh creek. Food abundance was higher in the marsh creek but only M. furnieri consumed more prey in this area, while O. argentinensis consumed more in the tidal flat. Differences in prey accessibility and sediment features between areas could explain these results. This work highlights the importance of marsh creeks as refuge and/or feeding grounds for fishes in infrequently flooded saltmarshes.

Gross morphology and surface ultrastructure of the gills of Odontesthes argentinensis (Actinopterygii, Atherinopsidae) from a Southwestern Atlantic coastal lagoon

2009 ◽  
Vol 41 (3) ◽  
pp. 193-198 ◽  
Author(s):  
Alcira O. Díaz ◽  
Mariano González Castro ◽  
Alicia M. García ◽  
Juan M. Díaz de Astarloa ◽  
Daniel E. Figueroa
Keyword(s):  
Coastal Lagoon ◽  
Southwestern Atlantic ◽  
Surface Ultrastructure ◽  
Atlantic Coastal ◽  
Odontesthes Argentinensis

Fish composition in a south-western Atlantic temperate coastal lagoon: spatial–temporal variation and relationships with environmental variables

2009 ◽  
Vol 89 (3) ◽  
pp. 593-604 ◽  
Author(s):  
M. González Castro ◽  
J.M. Díaz de Astarloa ◽  
M.B. Cousseau ◽  
D.E. Figueroa ◽  
S.M. Delpiani ◽  
...  
Keyword(s):  
Temporal Variation ◽  
Coastal Lagoon ◽  
Environmental Variables ◽  
Mesh Size ◽  
High Abundance ◽  
Spatial And Temporal Variation ◽  
Salinity Range ◽  
Buenos Aires Province ◽  
Western Atlantic ◽  
Odontesthes Argentinensis

Mar Chiquita, an irregularly shaped brackish-water coastal lagoon, is located in the Buenos Aires province of Argentina and considered since 1996 by the Coordination Council of the Man and Biosphere Program of UNESCO as a World Reserve of Biosphere. The present paper aims to study both the spatial and temporal variation of fish composition in this coastal lagoon and the influence of some environmental variables on the relative abundance of the main fish species. Monthly sampling surveys over a two-year period in three different areas were conducted, using a beach-seine net and three monofilament-gill nets with different mesh size. Twenty-eight species belonging to four bio-ecological categories were identified, five of them are new records for Mar Chiquita fish community. The correspondence analysis showed strong relationships between high salinity range and the abundance of Brevoortia aurea, Cynoscion guatucupa and Pomatomus saltatrix. Conversely, low salinity range corresponded to high abundance of Mugil platanus and Odontesthes argentinensis. High temperatures were corresponded with abundance of Micropogonias furnieri and Brevoortia aurea. In contrast, high abundance of both Odontesthes argentinensis and Oligosarcus jenynsii were corresponded to low temperatures. Brevoortia aurea, Mugil platanus and Odontesthes argentinensis were the most abundant species, representing more than 80% of the total capture. The group of estuarine-nondependent-marine fish presented the highest species richness. Estuarine-dependent-marine species presented for both juveniles and adults specimens the highest abundance values.

scholarly journals Temporal dynamics of a fish community in the lower portion of a tidal creek, Pando sub-estuarine system, Uruguay

2017 ◽  
Vol 107 (0) ◽  
Author(s):  
Rodrigo Gurdek ◽  
◽  
Alicia Acuña-Plavan
Keyword(s):  
Fish Community ◽  
Tidal Creek ◽  
Temporal Dynamics ◽  
Small Scale ◽  
Seasonal Patterns ◽  
Estuarine System ◽  
Micropogonias Furnieri ◽  
Different Time Scales ◽  
Odontesthes Argentinensis

ABSTRACT Estuaries are highly dynamic ecosystems subjected to variability of their fish communities over different time scales. The nearshore fish community of the lower Pando estuary, a temperate sub-system of the Río de la Plata estuary, was sampled from May 2002 to June 2003. A total of 2,165 fishes, represented by 16 species were caught by seine netting. Captures were dominated by juveniles (>90%), as well as by the sciaenid Micropogonias furnieri (Desmarest, 1823) (82.8%). The fish community showed high seasonal variability, with the greatest diversity and biomass in summer and spring and the highest species richness during summer. Lowest values of all community parameters occurred in winter and autumn, seasons that presented the highest similarity in fish composition. Number of species was correlated with water temperature and salinity. The ichthyofaunal composition showed significant diel differences in summer and spring. Diel changes were observed in the density of M. furnieri and Odontesthes argentinensis (Valenciennes, 1835), occurring mainly during the day, and of Mugil liza Valenciennes, 1836, Parapimelodus valenciennis (Lütken, 1874) and Brevoortia aurea (Spix & Agassiz, 1829), caught mostly during the night. Temporal variability was attributed to environmental fluctuations, life cycle of species as well as to feeding patterns and small-scale displacements. Presented findings in the Pando sub-estuary denote similar juvenile use and seasonal patterns to those found in estuaries. Further studies in the nursery function and juvenile dynamics over the year are recommended in order to better understand the ecological role of sub-estuaries.

Within-population morphological differences in the New World silverside Odontesthes argentinensis inhabiting two coastal lagoons of Uruguay (southwestern Atlantic)

2020 ◽  
Vol 70 (2) ◽  
pp. 189-202
Author(s):  
Renzo Vettorazzi ◽  
Diego Nuñez ◽  
Walter Norbis
Keyword(s):  
New World ◽  
Coastal Lagoons ◽  
Hydrodynamic Conditions ◽  
Eye Diameter ◽  
Morphological Variables ◽  
Different Populations ◽  
Morphological Differences ◽  
Estuarine Coastal ◽  
Atlantic Coastal ◽  
Odontesthes Argentinensis

Abstract Silversides are renowned for their phenotypic plasticity with different populations coexisting as incipient species. The New World silverside Odontesthes argentinensis is an estuarine-resident fish with known populations inhabiting the Rio de la Plata estuary as well as coastal lagoons of Brazil, Uruguay and Argentina, where it constitutes an important resource for artisanal fisheries. Using classical morphometric analysis, we study six morphological variables to determine if there are differences between the New World silversides collected from two Uruguayan Atlantic coastal lagoons (Garzon and Rocha Lagoons), which communicate periodically with the ocean. In collaboration with artisanal fishermen, silversides were measured in fresh condition. After removing the size and allometric effect on the variables, Canonical Discriminant Analysis (DA) was applied to compare the morphometry of individuals collected in the two lagoons. Results supported the existence of two groups with values greater than 80% of accurate classification. The morphometric variables that contributed the most to this result were eye diameter, breadth of mouth, length from mouth tip to anal fin and length of pectoral fin. The first two morphometric variables are related to sensory perception and feeding, which could be indicators of an ecological segregation, conditioned by the characteristics of the environment, considering that the two coastal lagoons differ in their abiotic characteristics, most importantly in their hydrodynamic conditions. This work represents the first study of differences between two estuarine coastal lagoon populations of O. argentinensis.

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