INVESTIGADORES
COLLINS Pablo Agustin
capítulos de libros
Título:
Chapter 11: Littoral Communities. Macrocrustaceans
Autor/es:
COLLINS P.; WILLINER V.; GIRI F.
Libro:
The Middle Paraná River: Limnology of a Subtropical Wetland
Editorial:
Springer-Verlag
Referencias:
Lugar: Heidelberg; Año: 2007; p. 277 - 302
Resumen:
An important biological group with an active participation in the community structure of the lotic and lentic environment are the macrocrustaceans of the Middle Paraná River, specifically the order Decapoda. These freshwater prawns and crabs are grouped into four families (Sergestidae, Palaemonidae, Aeglidae and Trichodactylidae). The Paraná River, a hyposaline environments, guided the appearance of mechanisms that allowed the decrease in permeability and salt losses. In this environment, the population parameter variations, as survival, feeding, growth, fecundity and/or local migration are ruled by physical and biological factors marking some heterogeneity within the hydrosystem. The species are co-adapted to the dynamics imposed by the Paraná River since its formation, habitat characteristics and stability degree. The intensity of disturbance (e.g. flooding, drought, thermal extremes, loss of refuge), habitat-vegetation - sediment relationship, food abundance, presence of preys, among others affect the presence of prawn and crabs, indicating that their densities in the Middle Paraná River have a sequential process.Therefore, it is an important group in the transference of matter and energy within the aquatic system, as well as towards the semi-terrestrial and terrestrial systems.