LA PESQUERÍA ORNAMENTAL DE LA ARAHUANA Osteoglossum bicirrhosum (OSTEOGLOSSIDAE) EN LORETO, PERÚ Y POSIBILIDADES DE SU CULTIVO

Alcantara-Bocanegra, Fernando; Chu-Koo, Fred William; Chávez-Veintemilla, Carlos; Tello-Martín, José Salvador; Bances-Chávez, Karin Cristina; Torrejón-Meza, Marco Antonio; Gómez-Noriega, Jorge Luís; Murrieta, Javier Noriega

doi:10.24841/fa.v16i1-2.290

Folia Amaz

2007

DOI: 10.24841/fa.v16i1-2.290

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LA PESQUERÍA ORNAMENTAL DE LA ARAHUANA Osteoglossum bicirrhosum (OSTEOGLOSSIDAE) EN LORETO, PERÚ Y POSIBILIDADES DE SU CULTIVO

Fernando Alcantara-Bocanegra

Fred William Chu-Koo

Carlos Chávez-Veintemilla

et al.

Abstract: La arahuana Osteoglossum bicirrhosum (Osteoglossidae) es un pez de cuerpo grande, de color plateado, que en el área de Loreto, Perú se comercializa como pez ornamental al estado de larva. En este artículo se presenta un análisissobre las zonas y épocas de pesca, los volúmenes de comercialización y las posibilidades del cultivo de la arahuana, en la región Loreto (Perú). La extracción de las larvas de esta especie se realiza principalmente en el sistema del río Ucayali y la Reserva Nacional Paca ya Samiria en d… Show more

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Contrasted hydrological systems of the Peruvian Amazon induce differences in growth patterns of the silver arowana, Osteoglossum bicirrhosum

Duponchelle¹,

Arce²,

Waty³

et al. 2012

Aquat. Living Resour.

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-In Amazonian fisheries, the silver arowana, Osteoglossum bicirrhosum (Cuvier 1829) is heavily exploited for human consumption as an adult, and for the aquarium trade as a small juvenile (yolk sac juvenile mainly). The periodicity of annuli formation on otoliths and growth variability of the silver arowana were studied in different river river-basins of the Peruvian Amazon between 2006 and 2009. Transverse stained sections of 606 individual otoliths were analysed from four different river-basins, the Amazonas, Ucayali, Napo and Putumayo, of which 554 could be interpreted. These belonged to 274 females ranging from 15 to 91 cm (standard length) and 280 males ranging from 30 to 91 cm. In addition, yolk sac juveniles of known age were collected to improve growth modelling. Monthly proportions of stained otolith edges validated the formation of a single annulus per year in two different river-basins with lagged hydrological cycles: the Amazonas-Ucayali and the Putumayo. Stained growth mark counts resulted in a longevity estimate of at least 16 years for the silver arowana in the Peruvian Amazon. This fish grew quickly during the first two years, and asymptotic growth was reached after four to five years, except in the Putumayo where it was reached slightly earlier. Results showed no significant growth dimorphism between sexes within basins, but indicated significant growth differences among river basins. Silver arowanas measured, on average, between 38 and 40 cm at the end of their first year. Length-at-age differences among river basins increased with age to reach over 14 cm (and >3 kg) after 7 years between the faster and slower growing populations (Amazonas and Putumayo, respectively). The growth differences observed emphasize the need for further investigation on the population structure of this species as, although these differences might merely be phenotypic responses to contrasted environmental conditions, they could alternatively reflect the existence of several populations with distinct genetic and life history characteristics. The consequences of such differences would be very important for the management and conservation of this fragile and extensively exploited species.

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Contrasted hydrological systems of the Peruvian Amazon induce differences in growth patterns of the silver arowana, Osteoglossum bicirrhosum

Duponchelle¹,

Arce²,

Waty³

et al. 2012

Aquat. Living Resour.

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show abstract

Variations in reproductive strategy of the silver Arowana, Osteoglossum bicirrhosum Cuvier, 1829 from four sub-basins of the Peruvian Amazon

et al. 2015

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Summary The aim of this study was to assess the variability of reproductive characteristics of the silver Arowana, Osteoglossum bicirrhosum, in four sub‐basins of the Peruvian Amazon: the Amazonas, Ucayali, Napo and Putumayo rivers. An illustrated, detailed gonadal maturation scale is proposed for a clearer determination of the reproductive status of male and female Arowana. The breeding season occurred during the dry season and early rising waters in the Amazonas and Ucayali, whereas it was restricted to the dry season in the Napo and Putumayo. A same female can reproduce more than once during the breeding season. Age at maturity was reached during the second year, at sizes varying between 43–45 cm for males and 46–50 cm SL for females. Important variations in fecundity were observed between fish of the four sub‐basins, whereas mean oocytes diameter and mass did not vary significantly, suggesting differences in reproductive investment. Together with previously reported variations of growth patterns in the same sub‐basins, these results suggest the existence of distinct populations in the Peruvian Amazon, with important consequences for management and conservation, but also for future aquaculture development programs.

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Growth, survival and the histology of the digestive tract of juvenile Osteoglossum bicirrhosum (Cuvier, 1829) fed three diets containing different protein and lipid levels

et al. 2015

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The influence of three commercial diets with different protein and lipid contents (40 : 14, 45 : 8, 48 : 8 protein : lipid -P : L, in % dry weight of diet) on growth performance, survival and the histology of the liver and intestine was analysed in early juveniles of silver arowana, Osteoglossum bicirrhosum, reared in captivity. Individuals (initial wet weight-W i = 1.07 AE 0.04 g; total length-TL = 6.0 AE 0.17 cm) were raised in triplicate (n = 12 fish per tank) at 26.2 AE 0.1°C and fed one of three commercial diets over 60 days. At the end of the trial, survival (90.5 AE 3.3%) and condition factor (0.5 AE 0.02) were not affected by dietary treatments, whereas specific growth rate, TL and W gain were lower in animals fed the 40P : 14L diet. Histological analysis revealed a larger accumulation of lipid droplets in the intestines of the group supplied with the 40P : 14L diet, as well as a larger surface of hepatic lipid vacuoles compared to the other treatments, although no signs of steatosis were observed. Juveniles fed the 48P : 8L diet displayed the lowest liver lipid accumulation; however, a protein content higher than 45% did not improve growth performance. The intestine and liver lipid accumulation of individuals fed the 45P : 8L diet might indicate a more balanced lipidic metabolism. Intestine and liver histologies proved to be useful markers to identify the nutritional condition in juveniles of O. bicirrhosum, even when differences in nutritional composition were subtle (i.e. protein variation of 3%).

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LA PESQUERÍA ORNAMENTAL DE LA ARAHUANA Osteoglossum bicirrhosum (OSTEOGLOSSIDAE) EN LORETO, PERÚ Y POSIBILIDADES DE SU CULTIVO

Cited by 4 publications

References 0 publications

Contrasted hydrological systems of the Peruvian Amazon induce differences in growth patterns of the silver arowana, Osteoglossum bicirrhosum

Contrasted hydrological systems of the Peruvian Amazon induce differences in growth patterns of the silver arowana, Osteoglossum bicirrhosum

Variations in reproductive strategy of the silver Arowana, Osteoglossum bicirrhosum Cuvier, 1829 from four sub-basins of the Peruvian Amazon

Growth, survival and the histology of the digestive tract of juvenile Osteoglossum bicirrhosum (Cuvier, 1829) fed three diets containing different protein and lipid levels

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