@article{fdi:010055835,
  title = {{C}ontrasted hydrological systems of the {P}eruvian {A}mazon induce differences in growth patterns of the silver arowana, {O}steoglossum bicirrhosum},
  author = {{D}uponchelle, {F}abrice and {A}rce, {A}. {R}. and {W}aty, {A}. and {P}anfili, {J}acques and {R}enno, {J}ean-{F}ran{\c{c}}ois and {F}arfan, {F}. and {G}arcia-{V}asquez, {A}. and {K}oo, {F}. {C}. and {D}avila, {C}. {G}. and {V}argas, {G}. and {O}rtiz, {A}. and {P}inedo, {R}. and {N}unez, {J}esus},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n {A}mazonian fisheries, the silver arowana, {O}steoglossum bicirrhosum ({C}uvier 1829) is heavily exploited for human consumption as an adult, and for the aquarium trade as a small juvenile (yolk sac juvenile mainly). {T}he periodicity of annuli formation on otoliths and growth variability of the silver arowana were studied in different river river-basins of the {P}eruvian {A}mazon between 2006 and 2009. {T}ransverse stained sections of 606 individual otoliths were analysed from four different river-basins, the {A}mazonas, {U}cayali, {N}apo and {P}utumayo, of which 554 could be interpreted. {T}hese belonged to 274 females ranging from 15 to 91 cm (standard length) and 280 males ranging from 30 to 91 cm. {I}n addition, yolk sac juveniles of known age were collected to improve growth modelling. {M}onthly proportions of stained otolith edges validated the formation of a single annulus per year in two different river-basins with lagged hydrological cycles: the {A}mazonas-{U}cayali and the {P}utumayo. {S}tained growth mark counts resulted in a longevity estimate of at least 16 years for the silver arowana in the {P}eruvian {A}mazon. {T}his fish grew quickly during the first two years, and asymptotic growth was reached after four to five years, except in the {P}utumayo where it was reached slightly earlier. {R}esults showed no significant growth dimorphism between sexes within basins, but indicated significant growth differences among river basins. {S}ilver arowanas measured, on average, between 38 and 40 cm at the end of their first year. {L}ength-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 ({A}mazonas and {P}utumayo, respectively). {T}he 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. {T}he consequences of such differences would be very important for the management and conservation of this fragile and extensively exploited species.},
  keywords = {{T}ropical freshwater fish ; {F}loodplain ; {O}tolith ; {V}on {B}ertalanffy growth function ; {L}ength-at-age ; {I}ntra-specific growth differences ; {O}steoglossidae ; {A}mazon ; {PEROU} ; {AMAZONIE}},
  booktitle = {},
  journal = {{A}quatic {L}iving {R}esources},
  volume = {25},
  numero = {1},
  pages = {55--66},
  ISSN = {0990-7440},
  year = {2012},
  DOI = {10.1051/alr/2012005},
  URL = {https://www.documentation.ird.fr/hor/fdi:010055835},
}