Abstract
The population structure and reproduction of Macrobrachium brasiliense were studied with the aim of better understanding the ecology of this species in relation to the Amazonian flood-pulse regime. A total of 3,306 animals were caught monthly from August 2011 to July 2013 at the Caru River, Itacoatiara, Amazonas State (Brazil). The average carapace length of males (6.87 ± 3.45 mm) and females (6.88 ± 4.78 mm) did not differ significantly (U = 0.608; p= 0.5432) for the overall study period. The sex ratio was biased toward females (M:F = 1:1.61; χ2=83.855; p< 0.0001). The reproduction was continuous, and although juveniles were present throughout the study period, the recruitment occurred primarily during the ebb (August–September) and drought (October–December) periods. Macrobrachium brasiliense presents a low number of large eggs, and egg volume increased during embryogenesis, by 21.1% from Stage I to III. The population size-frequency distribution presented no correlation with the abiotic variables, but ...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
