LTREB

Long-term research: Dare to be naive

Data from a current NSF Long Term Ecological Research Grant in Environmental Biology (LTREB) are presented.  Annual census data show densities of wooly bear caterpillars (Arctia virginalis) on Lupinus arboreus (cats/lup) and Conium maculatum (cats/hem) each March from 1985  to the present (means and se).  Rates of parasitism of caterpillars by the tachinid fly, Thelaira americana, are also shown.  These data are analyzed in:

Karban R. and de Valpine P. 2010. Journal of Animal Ecology 79:650-661.

If you would like to use these data, please contact me:  rkarban@ucdavis.edu.

 

Year	cats/lup	+se	cats/hem	+se	%para
1983	High
1984	Low
1985	Very Low				17
1986	1.28	0.04	1.52	0.07	0
1987	0.04	0.02	0.03	0.01	23
1988	0.39	0.15	0.1	0.03	21
1989	0.53	0.14	0.72	0.13	20
1990	0.78	0.21	0.85	0.11	71
1991	0.19	0.07	0.06	0.02	63
1992	1.87	0.6	0.93	0.03	6
1993	0.17	0.08	0.25	0.02	53
1994	0.28	0.11	0.08	0.04	61
1995	0.8	0.26	0.08	0.02	66
1996	2.72	0.43	0.55	0.11	6
1997	0.1	0.07	0.03	0.01	66
1998	0.65	0.24	0.085	0.015	9
1999	0.76	0.26	0.2	0.04	71
2000	0.21	0.1	0.19	0.02	34
2001	1.35	0.24	0.5	0.09	18
2002	0.32	0.16	0.17	0.1	17
2003	1.37	0.33	0.38	0.1	0
2004	0.04	0.03	0.02	0.01	29
2005	0.004	0.004	0.03	0.01	0
2006	0.01	0.007	0.02	0.009	35
2007	1.91	0.33	0.45	0.09	56
2008	1.44	0.28	0.53	0.12	44
2009	0.13	0.05	0.06	0.03	42
2010	0.06	0.04	0.03	0.01	0
2011	1.08	0.37	0.52	0.10	0
2012	1.82	0.29	0.07	0.07	8
2013	0.05	0.03	0.015	0.005	40
2014	0.23	0.06	0.11	0.02	32
2015	0.11	0.06	0.03	0.02	25
2016	0.53	0.19	0.06	0.02	3
2017	0.48	0.21	0.12	0.04	5
2018	0.85	0.23	0.10	0.03	8
2019	5.62	0.60	2.38	0.25	0
2020	0.083	0.056	0.015	0.01