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Life history, population structure and environmental modulation of Neomysis americana (Mysinae) in an intermittently open coastal lagoon of the South West Atlantic
Espinosa, N.; Calliari, D.; Rodríguez-Graña, L. (2019). Life history, population structure and environmental modulation of Neomysis americana (Mysinae) in an intermittently open coastal lagoon of the South West Atlantic. Est., Coast. and Shelf Sci. 223: 129-137. https://dx.doi.org/10.1016/j.ecss.2019.04.019
In: Estuarine, Coastal and Shelf Science. Academic Press: London; New York. ISSN 0272-7714; e-ISSN 1096-0015, meer
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| Trefwoorden |
Neomysis americana (S.I. Smith, 1873) [WoRMS]
Marien/Kust |
| Author keywords |
Opossum shrimp; Neomysis americana; Coastal lagoon; Populationstructure; Distribution |
| Auteurs | | Top |
- Espinosa, N.
- Calliari, D.
- Rodríguez-Graña, L.
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| Abstract |
Life history, seasonal population dynamics and spatial distribution pattern of the opossum shrimp Neomysis americana (Mysinae) were investigated during an annual cycle in the intermittently open coastal lagoon, Laguna de Rocha, Uruguay. Mysids were sampled by day with an epibenthic sled during the four seasons from January to November 2013. The study included estimates of the N. americana abundance and biomass distribution and its population structure (stages, sex ratio and size). Main environmental conditions were recorded at each period together with chlorophyll-a, and zooplankton abundance. All biotic estimations were converted to carbon units. N. americana occurred throughout the year with higher abundances in spring and its population was dominated by females. Results indicated that N. americana reproduces during all the year within the lagoon as juveniles were recorded along the sampled period with the occurrence of highest proportions in summer. Highest proportions of gravid females were recorded in spring. Wide tolerance and sustained reproduction under varying environmental conditions, as well as potential behavioural plasticity are traits prone to favour the further extension of the species to estuaries worldwide. |
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