Life History of the Gray Treefrog (Hyla chrysoscelis) in Western Tennessee

1990 ◽  
Vol 24 (2) ◽  
pp. 135 ◽  
Author(s):  
Mark E. Ritke ◽  
Jeffrey G. Babb ◽  
Mary K. Ritke
Keyword(s):  
Life History ◽  
Hyla Chrysoscelis ◽  
History Of ◽  
Gray Treefrog

Effects of environmental history, sibship, and age on predator-avoidance responses of tadpoles

1997 ◽  
Vol 75 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Christine M. Bridges ◽  
William H. N. Gutzke
Keyword(s):  
Environmental History ◽  
Predator Avoidance ◽  
Hyla Chrysoscelis ◽  
Predator Cues ◽  
Family Effects ◽  
Avoidance Behaviors ◽  
History Of ◽  
Rearing Condition ◽  
Sib Families ◽  
Gray Treefrog

Gray treefrog (Hyla chrysoscelis) tadpoles exhibit predator-avoidance behaviors, such as increased refugium use, in the presence of predators. We presented tadpoles with waterborne chemical cues from predators and with epidermal extracts of conspecifics. We also examined whether responses of tadpoles are affected by the presence of a predator in the environment in which they were reared, by their developmental stage, or by genetic (family) effects. Predator cues significantly increased the tadpoles' use of a refugium. Although there was no effect due to age alone, there was a significant interaction between predator cues and age, indicating that tadpoles may exhibit predator avoidance at most vulnerable sizes. The degree of expression of this behavior is also dependent upon the environmental history of the organism (i.e., rearing condition), indicating that this response can interact with environmental conditions (i.e., composition of the predator community). Additionally, we found no differences among full-sib families, suggesting that predator avoidance in this species may be influenced more by the environment than by genes.

Experimental life history of Echinostoma cinetorchis

1990 ◽  
Vol 28 (1) ◽  
pp. 39 ◽  
Author(s):  
S H Lee ◽  
J Y Chai ◽  
S T Hong ◽  
W M Sohn
Keyword(s):  
Life History ◽  
History Of

Queering Gender Identity Work: A Life History of a Black Transgender Woman

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Esethu Monakali
Keyword(s):  
Life History ◽  
Gender Identity ◽  
Public Spaces ◽  
Identity Work ◽  
Social Identities ◽  
Gender And Sexuality ◽  
Ongoing Effort ◽  
History Of ◽  
The Individual

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.

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