We contend that this characteristic is primarily driven by a higher rate of energy expenditure in males, although the growth dilution effect can make a substantial contribution in some cases. Evidence for a hot spot effect was apparent only for a population of older ages 14—17 burbot from Lake Erie [ 22 ].
Accordingly, the long-term effect of the release of eggs at spawning on the sex difference in PCB concentrations is negligible in the overwhelming majority of fish populations. Burger J. Psychoneuroendocrinology, 24— Rev Fish Biol Fish.
Similarly, in a population of the grey mouse lemur Microcebus murinusa small nocturnal primate endemic to Madagascar, males were more active than females over the course of the year [ 7576 ]. Glucocorticoid release and memory consolidation in men and women.
Terlecki, M. In cases where extraction is not used, matrix interference may substantially inflate measurements of sex steroid levels [ 94 ].
We hypothesize that the modest changes in PCB concentration of females due to release of eggs at spawning represent minor perturbations in the long-term trajectory of whole-fish PCB concentration of the females. Kootenai River fisheries investigation: stock status of burbot. How important is the digital divide?
Unpacking the cognitive map: The parallel map model of hippocampal function. The use of Hg mass balance models to estimate food consumption by fish has rapidly increased since [ 15168990 ]. After consideration of all four abovementioned hypotheses, the most likely primary driver of the sex difference in PCB concentrations was consistently identified as a higher rate of energy expenditure rate in males compared with females [ 37822 — 27 ].
Higher androgen levels in male lake whitefish compared with male lake trout would explain the considerably greater difference between the two abovementioned ratios for lake whitefish than for lake trout.
Download references. Thus, although the growth dilution effect made a substantial contribution Schwabe, L. Ecol Freshw Fish. In addition, the resolution of the RIA approach may not be sufficiently fine to accurately measure sex steroid levels, thereby also causing inflated measurements of these levels.