Produção de pós-larvas de Macrobrachium amazonicum (Heller, 1862) (Decapoda, Palaemonidae), sob condições controladas de laboratório

Relative growth, morphological sexual maturity, and size ofMacrobrachium amazonicum(Heller 1862) (Crustacea, Decapoda, Palaemonidae) in a population with an entirely freshwater life cycle

“…Because of its wide distribution, M. amazonicum has populations that are probably genetically isolated, many of which show intraspecific variations in physiology, ecology, morphology (Maciel and Valenti 2009), and genetic (Pileggi and Mantelatto 2010). This plasticity also makes it possible for the species to occupy a wide range of salinities, from entirely freshwater (Gamba 1984;Magalha˜es 1985Magalha˜es , 2000Bialetzki et al 1997;Porto 1998;Hayd and Nakagaki 2002;Magalha˜es et al 2005) to estuarine environments (Barreto and Soares 1982;Vega-Pe´rez 1984;Loba˜o et al 1986;Odinetz-Collart and Rabelo 1996;Peixoto 2002;Silva et al 2007).…”

Genetic variability of the Amazon River prawn Macrobrachium amazonicum (Decapoda, Caridea, Palaemonidae)

“…The members of this genus have three types of reproductive strategies: the first type has extended larval development that depends on marine access; the second includes species with distributions including inland and coastal waters, and their larval development is more or less extended; and the third type includes species with abbreviated larval development that are independent of marine influence and are restricted to inland waters (Williamson, 1973;Magalhães and Walker, 1988;Bueno and Rodrigues, 1995;Alekhnovich and Kulesh, 2001). The Amazon River prawn Macrobrachium amazonicum (Heller, 1862) is of the second type (Magalhães and Walker, 1988;Alekhnovich and Kulesh, 2001), and occupies a wide range of salinities, from fresh water (Gamba, 1984;Magalhães, 1985;Bialetzki et al, 1997;Gamba, 1997;Porto, 1998;Magalhães, 2000;Hayd and Nakagaki, 2002;Magalhães et al, 2005) to estuaries (Barreto and Soares, 1982;Vega-Pérez, 1984;Lobão et al, 1986;Odinetz-Collart and Rabelo, 1996;Peixoto, 2002;Silva et al, 2007).…”

Growth, elemental and proximate biochemical composition of larval Amazon River prawn, Macrobrachium amazonicum, reared under different salinity conditions

“…amazonicum, which is commonly referred to as "Amazon River prawn", can grow to large body size (up to about 16 cm total length or 30 g fresh weight) and is therefore considered as a candidate for commercial aquaculture (New, 2005;Moraes-Valenti & Valenti, 2010;Hayd et al, 2010Hayd et al, , 2014. Optimum physical conditions for larval rearing have been found at salinities 10-15 (Guest & Durocher, 1979;Barreto & Soares, 1982;Araujo & Valenti, 2007). Our experiments show, however, that successful development from hatching to the first juvenile stage is possible also at salinity 5.…”

“…Development from hatching to early juvenile stages of M. amazonicum is possible at oligohaline conditions (salinities 1-5), but maximum survival has been observed at higher salinities (10-16; Guest & Durocher, 1979;Barreto & Soares, 1982;Araujo & Valenti, 2007). Besides total salt concentration, also the ionic composition of the culture water is important for physiological functions such as respiration, excretion, and osmoregulation, especially at low salinities (Roy et al, 2007).…”