Fecundity and size at maturity of Palaemon longirostris (Decapoda, Palaemonidae) in the Mira River estuary (SW Portugal)

摘要: Summary The reproductive traits of female Palaemon longirostris were examined in this study. mean fecundity was 957±282 SD. egg volume increased 17% from the early to late development stage. By using allometric model, no simple volumetric relationship found between brood size and carapace length at any For both stages, a negative level obtained. During embryogenesis, loss estimated 5%, with apparent effect on size. Size maturity studied morphometric analyses, assuming that attainment sexual involves morphological changes pleura order form chamber. A Mature 1 analysis evidenced overlapping “growth-phase” lines, suggesting adult females may moult resting condition after breeding. obtained regression lines indicate presence different morphotypes, but do not correspond young prawns. To determine maturity, 2 ...