@article{fdi:010049218,
  title = {{L}ife-history characteristics of the large {A}mazonian migratory catfish {B}rachyplatystoma rousseauxii in the {I}quitos region, {P}eru},
  author = {{G}arcia {V}asquez, {A}. and {A}lonso, {J}.{C}. and {C}arvajal, {F}. and {M}oreau, {J}. and {N}unez, {J}esus and {R}enno, {J}ean-{F}ran{\c{c}}ois and {T}ello, {S}. and {M}ontreuil, {V}. and {D}uponchelle, {F}abrice},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he main life-history traits of the dorado {B}rachyplatystoma rousseauxii, a large {A}mazonian catfish undertaking the largest migration known for a freshwater fish species (from the nursery area in the estuary of the {A}mazon to the breeding zones in the head waters of the western {A}mazon basin close to the {A}ndes), were determined from a 5 year sampling of >15 000 specimens in the {P}eruvian {A}mazon. {T}he breeding season occurred during the falling and low-water periods, which is hypothesized to be an adaptation to maximize the chances of young stages to reach the estuary. {T}he size at first sexual maturity was slightly larger for females than males, c. 91 and 83 cm standard length ({L}-{S}), respectively. {B}oth males and females reproduce for the first time at >3 years old. {T}he fecundity per spawning event ranged from 481 734 to 1 045 284 oocytes for females weighing 25 and 34 kg, respectively. {S}easonal variations of body condition were similar among sexes, but differed between immature specimens that had a higher condition during the low-water period and lower condition during rising waters, and mature individuals that showed the opposite pattern. {T}he growth characteristics were estimated by {L}-{S} frequency analysis. {F}or females, the best fitting models gave a mean birth date in {A}ugust, during the height of the breeding cycle, with the following von {B}ertalanffy growth function parameters: {L}-{S} infinity = 153.3, {K} = 0.29 and t(0) = -0.37 years. {F}or males, the best fitting model gave a mean birth date in {J}uly, also during the height of the breeding period, with {L}-{S} infinity = 142, {K} = 0.30 and t(0) = -0.36 years. {A}t a given age, females were systematically larger than males and the size difference increased with age. {T}he largest females sampled (148 cm {L}-{S}) was 11 years old and the largest male (134 cm {L}-{S}) was 9 years old. {T}he mortality estimates were higher for males total ({Z}) = 1.34, natural ({M}) = 0.52 and fishing ({F}) = 0.82 than for females ({Z} = 0.98, {M} = 0.50, {F} = 0.48). {T}he life-history patterns of {B}. rousseauxii are discussed in light of the available knowledge about this species and the understanding of its complex life cycle.},
  keywords = {breeding season ; fecundity ; growth ; maturity ; mortality},
  booktitle = {},
  journal = {{J}ournal of {F}ish {B}iology},
  volume = {75},
  numero = {10},
  pages = {2527--2551},
  ISSN = {0022-1112},
  year = {2009},
  DOI = {10.1111/j.1095-8649.2009.02444.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010049218},
}