[PDF] Top 20 Sex ratio and parental investment in Trypoxylon (Trypargilum) agamemnon Richards (Hymenoptera, Crabronidae)

... example, in several species of the subgenus Trypargilum the males perform nest guarding, a behavior pattern uncommon in ...haplodiploid and the males are fatherless, the male will be the father only ... See full document

... male and female tissues (gynandromorphs) (DuBois, 1933; Metz and Law- rence, 1938; Mori et ...Mori and Perondini, 1980, 1984; Perondini, 1998; Sánchez and Perondini, ...individuals in ... See full document

... result in faster biological aging of females, despite the costly male investment in post-fledging care of ...production and post-fledging nest defense [6,29,30]. In addition the ... See full document

... Trivers and Willard predicted that, the animals manipulate SR of their offspring when net fitness benefits conferred by investment in sons and daughters differ ...reproduce in many ... See full document

... requires investment of resources derived from both the environment and maternal somatic ...Theory and empirical studies have argued that mothers modify reproductive performance relative to exogenous ... See full document

... species in which the sex is not fixed at fertilization but is determined by the parental female by the production of oocytes containing factors that dictate the pathway for the ensuing activity of ... See full document

... asymmetry in parental investment, with women being a scarce reproductive resource, is that parents are more interested in controlling the mate choices of their daughters than of their sons ... See full document

... theory and related fields (e.g., parental investment theory, Trivers, 1972) have generated some very general predictions with respect to differences between males and ...a sex ... See full document

... the sex ratio at birth (SRB = male to female live-births) exhibits a male ...the sex ratio for the worldwide adult population changes to 101 men to 100 women ...biological and ... See full document

... of Trypoxylon asuncicola were sampled in Viçosa, State of Minas Gerais, Brazil, in January 2000 and the occupants’ behavior of three nests was registered in 2h of direct ...open ... See full document

... age, and mother’s age at childbirth) was evaluated by a z-type ...the parental investment proxies (maternal worrying and change in direct ...trend in investment was ... See full document

... female investment in reproduction, the relationship between size and the sex ratio, the polyphasic weight-length relationship, or between-sexes variation in the condition ... See full document

... Unequal sex ratios lead to the loss of genetic variability, decreasing the viability of populations in the long ...habitats and can cause alterations in sex ratio and ... See full document

... males and females or due to fragment ...variance in Conopophaga lineata were tail, wing and tarsus ...male and female ...observed in the five morphological characteristics analyzed ... See full document

... to and 30 minutes following the administration of the disaccharide solution, breast milk was an exception, as it was permitted ad ...breastfeeding and LM, the lack of detailed information about ... See full document

... Both in Mexico and in Brazil, the positive correlations between tfp and the tot in the 1980­2014 period are very impressive indeed, as seen in Graphs 6 and 7, where tfp is ... See full document

... of Trypoxylon (Trypargilum) lactitarse Saussure and Trypoxylon (Trypargilum) rogenhoferi Kohl were obtained from trap-nests at Fazenda Santa Carlota, Cajuru, SP and at the Campus of the ... See full document

...  It was also considered revenue not related to hotel normal activity, namely related to cafeteria services, the sale of local products, cakes, tea, water and other beverages in the complex. It was ... See full document

... management and leverage is often ambiguous (Healy & Palepu, ...managers and creditors (Jensen & Meckling, ...which, in many cases, set some terms for the firm, ...considered in the ... See full document

... of investment risks and their causes, as well as provides a detailed classification of investment ...essence and content of the investment process, risk man- agement, providing material ... See full document