scholarly journals CONDITION-SPECIFIC COMPETITION IN CONTAINER MOSQUITOES: THE ROLE OF NONCOMPETING LIFE-HISTORY STAGES

Ecology ◽  
2005 ◽  
Vol 86 (12) ◽  
pp. 3289-3295 ◽  
Author(s):  
Katie S. Costanzo ◽  
Banugopan Kesavaraju ◽  
Steven A. Juliano
2006 ◽  
Vol 29 (3) ◽  
pp. 289-290
Author(s):  
Barbara J. King

Ontogeny, specifically the role of language in the human family now and in prehistory, is central to Locke & Bogin's (L&B's) thesis in a compelling way. The unique life-history stages of childhood and adolescence, however, must be interpreted not only against an exceptionally “high quality” human infancy but also in light of the evolution of co-constructed, emotionally based communication in ape, hominid, and human infancy.


2011 ◽  
Vol 36 (5) ◽  
pp. 605-615 ◽  
Author(s):  
KATIE S. COSTANZO ◽  
EPHANTUS J. MUTURI ◽  
BARRY W. ALTO

1995 ◽  
Vol 73 (12) ◽  
pp. 2292-2301 ◽  
Author(s):  
Karen P. Grant ◽  
Lawrence E. Licht

We tested the effects of ultraviolet-a (uv-a) and ultraviolet-b (uv-b) radiation on life-history stages of the anurans Bufo americanus, Hyla versicolor, Rana clamitans, and Rana sylvatica. No effect of uv-a was found on eggs or larvae even at exposures twice the intensity of normal outdoor levels. Only R. sylvatica was tested in the embryo stage. All embryos exposed to 30 min or more of artificially high intensity uv-b died. After exposure to artificially high intensity uv-b of 15 min or less, or at ecologically relevant levels, there was no effect on hatching success. The proportion of abnormal embryos after exposure to 10 or 15 min of artificially high intensity treatment was higher at 12 °C than at 20 °C. The jelly surrounding the ova can effectively reduce uv-b transmission through the egg mass. Of the four species tested, only larval R. clamitans showed some tolerance of artificially high uv-b levels, but development of the survivors was arrested and metamorphosis was not initiated. Ecologically relevant doses of uv-b had no effect on developmental period, duration of metamorphic climax, or mass at metamorphosis in B. americanus, H. versicolor, or R. sylvatica. Whereas all metamorphosed juvenile R. clamitans and R. sylvatica died after exposure to high-intensity uv-b, some B. americanus survived. Older B. americanus exposed for the same length of time had higher survivorship than younger animals. The role of uv radiation in presumed amphibian population declines is discussed.


2019 ◽  
pp. 43-66
Author(s):  
Eric Post

This chapter explores the role of time in ecology as a resource. In this framework, the established terms timing, rate, acceleration, and duration accrue more nuanced importance. Here, timing, rate, and duration refer to the onset of, progression through, and hence use of time in linked series of associated phenophases that comprise an individual organism's life history cycle. As with other resources, time available for allocation to such phenophases or life history stages is limited in supply, and it is in demand by conspecific and heterospecific competitors alike. The chapter then argues that time, much like space, varies in its scales of availability for use by the individual organism, and in its forms available for use by the individual organism.


2017 ◽  
Vol 14 (1) ◽  
pp. 101-112 ◽  
Author(s):  
Melissa Kelly

This article uses the concepts of ‘transnational social fields’ and ‘habitus’ to explore the multifaceted role families play in shaping the aspirations of onward migrating youth. The article draws on biographical life history interviews conducted with the children of Iranian migrants who were raised in Sweden but moved to London, UK as adults. The findings of the study suggest that from a young age, all the participants were pressured by their parents to perform well academically, and to achieve high level careers. These goals were easier to achieve in London than in Sweden for several reasons. Interestingly, however, participants’ understandings of what constituted success and their motivations for onward migration were nuanced and varied considerably by gender. The study contributes to an understanding of the role of multi-sited transnational social fields in shaping the aspirations of migrant youths, as well as the strategies taken up by these migrants to achieve their goals.


2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Esethu Monakali

This article offers an analysis of the identity work of a black transgender woman through life history research. Identity work pertains to the ongoing effort of authoring oneself and positions the individual as the agent; not a passive recipient of identity scripts. The findings draw from three life history interviews. Using thematic analysis, the following themes emerge: institutionalisation of gender norms; gender and sexuality unintelligibility; transitioning and passing; and lastly, gender expression and public spaces. The discussion follows from a poststructuralist conception of identity, which frames identity as fluid and as being continually established. The study contends that identity work is a complex and fragmented process, which is shaped by other social identities. To that end, the study also acknowledges the role of collective agency in shaping gender identity.


2017 ◽  
Vol 49 (6) ◽  
pp. 783 ◽  
Author(s):  
Yan WANG ◽  
Zhenchao LIN ◽  
Bowen HOU ◽  
Shijin SUN

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