ESTRATÉGIA REPRODUTIVA E ALGUNS ASPECTOS DEMOGRÁFICOS DO CAMARÃO Palaemonetes carteri GORDON, 1935 NA AMAZONIA CENTRAL, RIO NEGRO

Abstract

A ecologia do camarão Palaemonetes carteri Gordon, 1935 (Decapoda: Palaemonidae) foi estudada através de coletas mensais, realizadas de janeiro 1989 até maio 1990, na região de Manaus. P. carteri vive na liteira submersa dos igarapés de terra firme em áreas baixas inundadas periodicamente pelas enchentes dos rios. A estratégia de reprodução e a dinâmica da razão sexual foram estudados na base dos 4,441 indivíduos coletados. P. carteri mostrou um dimorfismo sexual do comprimento, as fêmeas sendo maiores que os machos. O período de reprodução foi restrito a enchente e a cheia das águas. O número de ovos por fêmea variou entre 5 e 39, sem nenhuma correlação com o tamanho das fêmeas. A razão sexual mostrou uma predominância de fêmeas sem nenhuma variação sazonal significativa.

Reproductive potential of four freshwater prawn species in the Amazon region

“…Due to the environments inhabited by the species studied here, fecundity corroborates that of other hololimnetic prawns, which tend to have few large yolky eggs hatching lecithotrophic larvae in advanced stages (Collart and Enriconi 1993;García-Dávila et al 2000; be compared with the results of Pereira and Chacur (2009) that captured only one ovigerous female. Palaemon carteri had different CL sizes to the other three species evaluated in this study, and different CL sizes to those recorded by Collart and Enriconi (1993). However, the TL of P. carteri was similar to the TL obtained by Santos and Vieira (2006).…”

“…García-Dávila et al 2000and Pereira and Chacur (2009) conducted studies on the reproductive biology of M. brasiliense. Moreover, the reproductive strategy of P. carteri was investigated in the Rio Negro by Collart and Enriconi (1993), as well as fecundity including a comparison of egg volume between embryonic stages of development (Santos and Vieira 2016). Studies on Ps.…”

“…However, the TL of P. carteri was similar to the TL obtained by Santos and Vieira (2006). This species had 5-39 eggs in Central Amazon (Collart and Enriconi 1993) and 4-29 in Eastern Amazon (Santos and Vieira 2016). The fecundity of Ps.…”

“…The freshwater prawn species studied here are not occurring in estuarine or marine environments to complete their ontogenetic cycle, like P. pandaliformis (see Paschoal et al 2016). These animals developed reproductive strategies, such as the incubation of a few yolky eggs (Magalhães and Walker 1988;Collart and Enriconi 1993), due to the evolutionary process that led to the continentalisation of these species (Jalihal et al 1993). Macrobrachium brasiliense and Ps.…”

New data on Beurlenia araripensis Martins-Neto & Mezzalira, 1991, a lacustrine shrimp from Crato Formation, and its morphological variations based on the shape and the number of rostral spines

“…These characteristics are not enough to consistently differentiate P. ivonicus from P. carteri [19,23,25]. Therefore, the high interspecific similarity and intraspecific variability found in these species raised doubts whether they represent distinct biological entities [20,[22][23][24]. Molecular data on shrimps, considering the genetic structures of P. ivonicus and P. carteri, may show the existence of cryptic species.…”