Data from: Ultraviolet irradiation increases size of the first clutch but decreases longevity in a marine copepod
An important component of life history theory is understanding how natural variation arises in populations. Both endogenous and exogenous factors contribute to organism survival and reproduction, and therefore, it is important to understand how such factors are both beneficial and detrimental to pop...
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Zusammenfassung: | An important component of life history theory is understanding how natural
variation arises in populations. Both endogenous and exogenous factors
contribute to organism survival and reproduction, and therefore, it is
important to understand how such factors are both beneficial and
detrimental to population dynamics. One ecologically relevant factor that
influences the life history of aquatic organisms is ultraviolet (UV)
radiation. While the majority of research has focused on the potentially
detrimental effects that UV radiation has on aquatic organisms, few
studies have evaluated hormetic responses stimulated by radiation under
select conditions. The goal of this study was to evaluate the impact of
UV-A/B irradiation on life history characteristics in Tigriopus
californicus copepods. After exposing copepods to UV-A/B irradiation
(control, one, and three-hour UV treatments at 0.5 W/m2), we measured the
impact of exposure on fecundity, reproductive effort, and longevity. We
found that UV irradiation increased the size of the first clutch among all
reproducing females in both the one and three-hour experimental groups and
decreased longevity among all females that mated in the one-hour
treatment. UV irradiation had no effect on the number of clutches females
produced. These findings indicate a potential benefit of UV irradiation on
reproductive performance early in life, although the same exposure came at
a cost to longevity. |
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DOI: | 10.5061/dryad.kg18b9c |