Abstract
Due to the importance of ornamental fishing of silver arowana, as well as, Lago Grande lake as one of the main areas for capturing baby arowanas in Peru, the present study aimed to evaluate the productivity and the biological-reproductive characteristics of the species in the lake, which is located in the lower basin of the Putumayo River and represents an area preferred by fishermen because the important populations of silver arowana inhabiting it. Analysis of population density, biometrics, sexual maturity, spawning, fecundity, sex ratio, water level of the lake and production of baby arowana were made. The study was developed between March and July of 2012 and to implement the activities of the study was important the participation of the Association of Fishermen “Fronteras Vivas”. In general, the population density extrapolated to the lake area was 1.29 fish/ha. Of these, the density of progenitors in the lake was 1.19 fish/ha. Also, male animals had total length, standard length and total weight higher than females and it was observed that the spawning period occurred in synchronization with the start of the growing of the hydrological regime. The average number of oocytes produced by females of silver arowana in the study area was 201 and the sex ratio was equilibrated. Furthermore, the study shows the capacity of production of the lake. In order to this the water lever influenced in the production of baby arowanas. It is important to continue studying the species for regulate the fishing and recover populations. Keywords: baby arowana; production; ornamental trade; length of first sexual maturity; fishing. Normal 0 21 false false false PT-BR X-NONE X-NONE
Highlights
The development of new knowledge, as a result of ongoing assessments of the dynamics of fisheries, shows that fisheries resources are limited
The silver arowana is increasingly popular on the international aquarium fish market (MOREAU; COOMES, 2006, 2007; ALCANTARA et al, 2007), with considerable economic importance to the communities around the fishing areas (LOWE-MCCONNELL, 1975; KVIST et al, 2001; MOREAU; COOMES, 2006)
Due to the importance of ornamental fishing of silver arowana, as well as, Grande lake as one of the main areas for capturing the species, the present study aimed to evaluate the productivity and the biologicalreproductive characteristics in the lake during the specific year period of using of the species, contributing to the knowledge of the species
Summary
The development of new knowledge, as a result of ongoing assessments of the dynamics of fisheries, shows that fisheries resources are limited Even, their contribution to the nutritional and socio-economic wellbeing of the growing human population could be affected for extractive activities (KVIST et al, 2001). Their contribution to the nutritional and socio-economic wellbeing of the growing human population could be affected for extractive activities (KVIST et al, 2001) In this sense, the productivity of Amazonian fisheries has been declining for the floodplain deforestation (SMITH, 1985), as well as, uncontrolled fishing. The productivity of Amazonian fisheries has been declining for the floodplain deforestation (SMITH, 1985), as well as, uncontrolled fishing This is observed on silver arowana populations, Osteoglossum bicirrhosum (Cuvier, 1829), a relative of pirarucu that enters the aquarium trade, which capture declined significantly in the last years (GARCIA et al, 2009). This species is considered one of the most important species to the Peruvian (MOREAU; COOMES, 2006; ALCANTARA et al, 2007) and Colombian (SANCHEZ; ALONSO, 2004)
Sign-in/Register to view highlights & summary 
Published Version (
Free)
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 call