195,999 research outputs found
Strategie di sfarfallamento nelle ninfe di Perla grandis e Perla marginata (Plecoptera: Perlidae)
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Effects of immune challenge and supra-normal clutch production on egg quality in the red-legged partridge
No full textEgg-sequence rather than mating preference influences female egg investment in the red-legged partridge
No full textInfluence of male dominance on egg testosterone and antibacterial substances in the egg of grey partridges
No full textMaternal effects play an important role in mediating reproductive success; the different allocation of resources in eggs is considered as an important maternal effect. In oviparous vertebrates, there are several substances (hormones, immunoglobulins, antioxidants, antibacterial molecules) that females may allocate differentially. Mate choice is a key factor infuencing female reproductive decisions and investment in egg, but it is not clear to what extent the dominance status of the partner can influence the decision to invest differentially in the quality of eggs. In the grey partridge Perdix perdix, we ranked males for their social status after pairwise dominance tests. Then, females were paired experimentally with dominant or subordinate individuals. We measured testosterone, lysozyme and ovotransferrin concentrations in their eggs. Females paired with dominant males laid eggs with higher testosterone concentration, while egg mass, lysozyme and ovotransferrin concentrations did not differ. With regard to testosterone, since this hormone has been shown to elicit beneficial effects in offspring hatching from grey partridge eggs, our results are in line with the differential allocation hypothesis that females paired with high quality males should invest more in the current reproductive event
L’importanza dell’uso di ambienti artificiali nell’ambito degli studi di ecologia di organismi fluviali
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Do predators condition the distribution of prey within micro habitats? An experiment with stoneflies (Plecoptera)
No full textDr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
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