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Title of Journal: Behav Ecol Sociobiol

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Abbravation: Behavioral Ecology and Sociobiology

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Springer Berlin Heidelberg

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DOI

10.1016/j.amjoto.2005.01.013

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1432-0762

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Variable flight distance to resources results in c

Authors: Jason H Peterson Bernard D Roitberg
Publish Date: 2015/11/28
Volume: 70, Issue: 2, Pages: 247-253
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Abstract

Resource availability and location are expected to vary based on use by individuals and changing ecological conditions the response of animals to those changes is critical to their fitness To investigate the effects of changing conditions on fitness we conducted field experiments using the centralplaceforaging alfalfa leafcutting bee Megachile rotundata examining the changes in sex allocation when presented with changes in flight distance required to obtain resources The results suggest that changes in flight distance to resources during the year’s flight season altered subsequent allocation decisions mothers experiencing long flight distance to resources early in the season and short flight distance later in the season generated a greater proportion of female offspring than mothers experiencing the opposite During the second half of the season however it was current experimental conditions significantly impacting decisions with those mothers residing near the resources producing a greater portion of female offspring than those far from resources regardless of flight distances experienced earlier in the year These results show that sex allocation decisions may change dynamically during a female’s lifetime in response to ecological changes We also looked at these results through the contradicting hypotheses marginal value theorem and sex ratio theory finding that the latter may be in play depending on an individual’s past and/or present conditionIt is clear that some animals can alter their investment towards sons or daughters but it is not known whether such organisms continually modify these decisions throughout their lifetimes or are constrained to a onceonly decision We solved this problem via an experimental design wherein distance to floral resources was reversed partway through the season for leafcutting bees The bees demonstrated ability to dynamically alter their sex allocation decisions as their field environment changed as well as their own internal states eg wing wear and tear Our dataset provided a great opportunity to test predictions from sex allocation versus classic foraging theory We found that the former is better at explaining parental allocation behaviour Since many organisms are iteroparous the notion of dynamic reproductive allocation will be important to our understanding of the evolution of reproductive strategiesWe thank Elizabeth Elle Dov Lank Jay Rosenheim and David Green for discussions on this issue our field assistant Gordon Peterson Gloria Evans for editorial comments and Brian Ma for his editorial help on earlier drafts This work was supported by the Natural Sciences and Engineering Research Council of Canada through a Postgraduate doctoral scholarship JHP and operating grant BDR

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Other Papers In This Journal:
  1. Inbreeding and local mate competition in the ant Cardiocondyla batesii
  2. Honeybees use a Lévy flight search strategy and odour-mediated anemotaxis to relocate food sources
  3. Evolution of the fast start response in the cavefish Astyanax mexicanus
  4. Female oxidative status, egg antioxidant protection and eggshell pigmentation: a supplemental feeding experiment in great tits
  5. Secondary sex ratios do not support maternal manipulation: extensive data from laboratory colonies of spiny mice (Muridae: Acomys )
  6. Wildlife contact analysis: emerging methods, questions, and challenges
  7. Prior experience with eggs laid by non-nestmate queens induces egg acceptance errors in ant workers
  8. Ecological and hormonal correlates of antipredator behavior in adult Belding’s ground squirrels ( Spermophilus beldingi )
  9. Male spottail darters ( Etheostoma squamiceps ) do not use chemical or positional cues to discriminate between sired and foster eggs
  10. Parentally biased favouritism in relation to offspring sex in zebra finches
  11. Feeding and aggressive behaviours in juvenile coho salmon ( Oncorhynchus kisutch ) under chemically-mediated risk of predation
  12. Experimentally elevated plasma levels of testosterone do not increase male reproductive success in blue tits
  13. Strategic exploitation in a socially parasitic bee: a benefit in waiting?
  14. Underwater and above-water search patterns of an Arctic seabird: reduced searching at small spatiotemporal scales
  15. Reproductive trade-offs from mating with a successful male: the case of the tephritid fly Anastrepha obliqua
  16. Heavier birds react faster to predators: individual differences in the detection of stalking and ambush predators
  17. Bright moonlight triggers natal dispersal departures
  18. Does leadership indicate male quality in Neoconocephalus katydids?
  19. Sexual selection favours small and symmetric males in the polygynous greater sac-winged bat Saccopteryx bilineata (Emballonuridae, Chiroptera)
  20. Condition dependence of male display coloration in a jumping spider ( Habronattus pyrrithrix )
  21. Chemical mimicry in an incipient leaf-cutting ant social parasite
  22. Queen acceptance and the complexity of nestmate discrimination in the Argentine ant
  23. Exaggerated orientation scatter of nocturnal passerine migrants close to breeding grounds: comparisons between seasons and latitudes
  24. Love bites: male fang use during coercive mating in wolf spiders
  25. Complex call in male rock hyrax ( Procavia capensis ): a multi-information distributing channel
  26. Sex differences in the movement patterns of free-ranging chimpanzees ( Pan troglodytes schweinfurthii ): foraging and border checking
  27. Sperm competition and evidence of sperm fertilization patterns in the carrion ball-roller beetle Canthon cyanellus cyanellus LeConte (Scarabaeidae: Scarabaeinae)
  28. Laying-order effects on sperm numbers and on paternity: comparing three passerine birds with different life histories
  29. Hunted hunters? Effect of group size on predation risk and growth in the Australian subsocial crab spider Diaea ergandros
  30. Olfactory eavesdropping between two competing stingless bee species
  31. Sympatric species of threespine stickleback differ in their performance in a spatial learning task
  32. Differing rates of extra-group paternity between two populations of the Australian magpie ( Gymnorhina tibicen )
  33. Sexual dimorphism and the mating ecology of polar bears ( Ursus maritimus ) at Svalbard
  34. The meat-scrap hypothesis: small quantities of meat may promote cooperative hunting in wild chimpanzees ( Pan troglodytes )
  35. Preference for male traits in female wolf spiders varies with the choice of available males, female age and reproductive state
  36. Weighting waiting in collective decision-making
  37. A field test of the Hamilton–Zuk hypothesis in the Trinidadian guppy ( Poecilia reticulata )
  38. Female philopatry and its social benefits among Bornean orangutans
  39. Older can be better: physiological costs of paternal investment in the Florida scrub-jay
  40. The behavioural consequences of translocation: how do invasive cane toads ( Rhinella marina ) respond to transport and release to novel environments?
  41. Aggressive thresholds in Dendropsophus ebraccatus : habituation and sensitization to different call types
  42. A good day to die: bridging the gap between costs and benefits of parental care
  43. Do male plumage and song characteristics influence female off-territory forays and paternity in the hooded warbler?
  44. Network structure and prevalence of Cryptosporidium in Belding’s ground squirrels
  45. Guppies as heterospecific facilitators: a precursor of exploratory behavior?
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