Frade D G, Nogueira S, Santos M J, Cavaleiro F I
Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR/CIMAR), Universidade do Porto,Rua dos Bragas 289, 4050-123 Porto,Portugal.
Departamento de Biologia,Universidade do Porto, Faculdade de Ciências,Rua do Campo Alegre, s/n, Edifício FC4, 4169-007 Porto,Portugal.
Parasitology. 2016 Dec;143(14):1945-1953. doi: 10.1017/S0031182016001578. Epub 2016 Sep 19.
The reproductive strategy of Acanthochondria cornuta, a parasitic copepod with dwarf, hyperparasitic males, is described in detail. The potential impact of male parasitism on the reproductive output was evaluated by determining the size of each sex and the female's fecundity, egg size and total reproductive effort for each pair/trio throughout the four seasons of the year. Marked seasonal differences were observed in female size and reproductive output, suggesting two distinct generations, but no differences were observed for male size. No statistically significant correlations were observed between male size and any measure of reproductive effort, but females with larger males had lower fecundity. A trade-off between egg number and egg size was recorded. Overall, the reproductive effort in A. cornuta seems to be determined mostly by female size, and larger females do not hold smaller males.
详细描述了角棘缘猛水蚤（一种具有矮小、超寄生雄性的寄生桡足类动物）的繁殖策略。通过确定一年四个季节中每对/每组雌雄个体的大小、雌体的繁殖力、卵的大小和总繁殖投入，评估了雄性寄生对繁殖产出的潜在影响。在雌体大小和繁殖产出方面观察到明显的季节性差异，表明存在两个不同的世代，但在雄体大小方面未观察到差异。在雄体大小与任何繁殖投入指标之间未观察到统计学上的显著相关性，但与较大雄体配对的雌体繁殖力较低。记录到卵的数量和大小之间存在权衡。总体而言，角棘缘猛水蚤的繁殖投入似乎主要由雌体大小决定，较大的雌体不会与较小的雄体配对。
