Steven Hecht Orzack
Overview
Explore the profile of Steven Hecht Orzack including associated specialties, affiliations and a list of published articles.
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Articles
16
Citations
312
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Recent Articles
1.
Orzack S, Hardy I
Proc Biol Sci
. 2021 Mar;
288(1947):20202638.
PMID: 33757342
No abstract available.
2.
Orzack S, Steiner U, Tuljapurkar S, Thompson P
Oikos
. 2017 Nov;
120(3):369-380.
PMID: 29093607
Understanding the static and dynamic expression of life history traits is a prerequisite for the development of a causal theory of the evolution of aging and of life histories. We...
3.
Orzack S, Sohn J, Kallman K, Levin S, Johnston R
Evolution
. 2017 Jun;
34(4):663-672.
PMID: 28563992
No abstract available.
4.
Orzack S, Parker Jr E
Evolution
. 2017 May;
40(2):331-340.
PMID: 28556046
The precision of sex-ratio control in a parasitic wasp, Nasonia vitripennis (Pteromalidae) was investigated using a series of "sequential oviposition" experiments in which a female oviposits on hosts previously visited...
5.
Orzack S
Evolution
. 2017 May;
40(2):341-356.
PMID: 28556040
An optimal theory of facultative sex-ratio adjustment (Werren, 1980) was tested using the data from a series of sequential oviposition experiments (Orzack and Parker, 1986). Sex ratios produced by several...
6.
Orzack S, Stubblefield J, Akmaev V, Colls P, Munne S, Scholl T, et al.
Proc Natl Acad Sci U S A
. 2015 Apr;
112(16):E2102-11.
PMID: 25825766
We describe the trajectory of the human sex ratio from conception to birth by analyzing data from (i) 3- to 6-d-old embryos, (ii) induced abortions, (iii) chorionic villus sampling, (iv)...
7.
Shpak M, Orzack S, Barany E
Theor Popul Biol
. 2013 Jul;
88:47-56.
PMID: 23810907
We derive the frequency-dependent selection coefficient caused by "demographic" stochasticity resulting from the random sampling of opponents an individual faces during behavioral "contests" with other individuals. The mean, variance, and...
8.
Stubblefield J, Orzack S
Theor Popul Biol
. 2012 Nov;
83:64-81.
PMID: 23164634
In some vertebrates, offspring help their parents produce additional offspring. Often individuals of one sex are more likely to become "helpers at the nest". We analyze how such sex-biased offspring...
9.
Orzack S
Philos Trans R Soc Lond B Biol Sci
. 2011 Dec;
367(1586):170-80.
PMID: 22144380
Biologists in search of answers to real-world issues such as the ecological consequences of global warming, the design of species' conservation plans, understanding landscape dynamics and understanding gene expression make...
10.
Steiner U, Tuljapurkar S, Orzack S
J Anim Ecol
. 2010 Jan;
79(2):436-44.
PMID: 20102422
1. Understanding the evolution of life histories requires an assessment of the process that generates variation in life histories. Within-population heterogeneity of life histories can be dynamically generated by stochastic...