IBBEA   24401
INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Unidad Ejecutora - UE
artículos
Título:
Female growth and offspring quality over successive spawnings in a caridean shrimp with direct development, Neocaridina davidi (Decapoda, Atyidae)
Autor/es:
CAROLINA TROPEA; LAURA S. LÓPEZ GRECO
Revista:
BIOLOGICAL BULLETIN
Editorial:
MARINE BIOLOGICAL LABORATORY
Referencias:
Lugar: Woods Hole; Año: 2015 vol. 229 p. 243 - 254
ISSN:
0006-3185
Resumen:
This study analyzed the quality of recentlyspawned eggs and of juveniles over five and six consecutivespawns, respectively, in a caridean shrimp Neocaridinadavidi with direct development. The potential energeticantagonism between reproduction and somatic growth wasalso evaluated. The number of eggs per spawn per femalewas highest in the first spawn, while the number of recentlyhatched juveniles per spawn per female declined in the sixthspawn. Lower lipid concentration and energy content weredetected in eggs of the fourth and fifth spawns, which mayindicate for the first time a decrease in maternal provisioningas a result of multiple spawning in a decapod with directdevelopment. This result had no effect on the size of eggs orof recently hatched juveniles, nor on the growth performanceof juveniles during a 30-day period following hatching.Lipids were the most abundant biochemical componentof eggs, followed by proteins and glycogen; the relativeproportion of each component was probably related to embryonicdevelopment type. Egg volume was unsuitable asan indicator of nutrient content, as no correlation was foundbetween these variables. The physiological costs of reproductionwere evident from the lower energy content offemales that reproduced versus females that remained virgin.The lower body weight of the reproductive females atthe end of the experiment showed that allocation of resourcesto reproduction occurred at the expense of somaticgrowth. To our knowledge, this is the first empirical demonstrationof a decapod with direct development.