Ecological Archives E096-050-A1

Ecological Archives E096-050-A1

Jessica F. Stephenson, Cock Van Oosterhout, Ryan S. Mohammed, and Joanne Cable. 2015. Parasites of Trinidadian guppies: evidence for sex- and age-specific trait-mediated indirect effects of predators. Ecology 96:489–498. http://dx.doi.org/10.1890/14-0495.1

Appendix A. Tables summarizing the sampled sites and the analysis describing patterns in Gyrodactylus abundance.

Table A1. Summary of the data set.

Drainage	River	Course	Site	Years Sampled	UTM (20P)		Sample size	Gyrodactylus spp. prevalence	Gyrodactylus spp. mean intensity	Other symbionts present (prevalence)
Drainage	River	Course	Site	Years Sampled	GPS E	GPS N	Sample size	Gyrodactylus spp. prevalence	Gyrodactylus spp. mean intensity	Other symbionts present (prevalence)
Caroni	Arima	Lower	1	2006	689982	1173762	50	0	-	Fungus (0.020)
		Lower	2	2003	689016	1176837	53	0.84	6.69
		Mid		2003, 2006	687034	1179246	69	0.58	24.15	Trichodina (0.145), Ichthyophthirius (0.029), Fungus (0.014)
		Upper		2003	687672	1178320	64	0.14	2.44
	Aripo	Lower		2003, 2006, 2008	694410	1177783	291	0.40	5.44	Trichodina (0.007), Fungus (0.003), Digenean (0.034)
		Upper	1	2006, 2008	694030	1182128	73	0.08	1.00	Fungus (0.028)
			2	2008	692771	1182303	30	0.38	3.90
			3	2006, 2008	693230	1182328	145	0.67	1.10	Trichodina (0.076), Fungus (0.069)
			4	2006	693221	1181917	56	0.07	2.64
			5	2003	693277	1181843	4	0.00	-
			6	2003	?		56	0.50	1.54
			7	2003	?		24	0.43	2.50
			8	2003	693277	1181843	102	0.62	3.29	Fungus (0.008)
			9	2006	693823	1180613	48	0.02	2.00	Ichthyophthirius (0.104)
	Caura	Lower		2003	678436	1177236	227	0.00	-
		Upper	1	2003, 2004	699539	1182054	153	0.24	1.81	Fungus (0.007)
			2	2003	679627	1182692	110	0.00	-
			3	2003	679757	1182475	77	0.19	1.47
	Dyke	Lower	1	2003, 2004, 2006	674748	1177894	92	0.10	26.56	Trichodina (0.022), Fungus (0.022)
			2	2003, 2006	675080	1177892	184	0.61	4.71	Trichodina (0.016), Digenean (0.016)
			3	2003, 2004	674869	1177433	177	0.21	1.81	Trichodina (0.751)
	Guanapo	Lower		2003, 2004, 2006	691385	1174569	232	0.23	2.68	Trichodina (0.103)
		Mid		2003	691815	1176691	20	0.20	4.00
		Upper		2003	690247	1182015	91	0.11	1.80
	Lopinot	Lower		2003, 2004, 2006	683553	1175663	453	0.60	5.00	Digenean (0.002)
		Mid		2006	684127	1156566	30	0.40	1.50	Fungus (0.024)
		Upper		2003, 2004, 2006	683520	1182443	187	0.38	2.80
	Maracas	Upper		2003	671265	1183604	145	0.44	9.05
Coffee	Coffee	Lower		2009	651072	1132467	41	0.00	-	Fungus (0.024)
Cunupia	Dyke	Lower	1	2006	678485	1168663	22	0.23	1.00	Trichodina (0.500)
Cunupia	Dyke	Lower	2	2006	673445	1165676	50	0.02	1.00	Trichodina (0.920), Ichthyophthirius (0.020)
Guapo	Guapo	Lower	1	2006	646956	1124820	1	1.00	5.00	Trichodina (1.000)
Guapo	Guapo	Lower	2	2006	646609	1125009	10	0.80	1.63	Trichodina (0.800), Digenean (0.300)
La Seiva	La Seiva	Lower		2006			61	0.08	1.40	Ichthyophthirius (0.016), Fungus (0.033)
Lizard	Lizard	Lower		2004	715789	1122959	12	0.00	-
Marianne	Marianne	Lower		2003, 2004	685890	1193642	70	0.71	3.10
		Mid	1	2006			4	0.00	-
		Mid	2	2006			31	0.00	-	Ichthyophthirius (0.065), Fungus (0.032)
		Upper		2003, 2004	685891	1192747	171	0.13	1.59
Matura	Matura	Lower		2006	713012	1181533	49	0.39	1.47	Fungus (0.041)
Mayaro	Pilote	Lower		2004	711697	1121927	16	0.00	-
	Tributary	Lower	1	2006	719160	1138112	20	1.00	10.50	Trichodina (0.950), Fungus (0.100), Digenean (0.05)
	Tributary	Lower	2	2006	719153	1137295	20	0.95	16.89	Trichodina (0.800),
Nariva	Manzanilla	Lower		2006			3	1.00	1.33
North East	Toco	Lower		2006	727327	1198431	3	0.00	-
Oropuche	Oropuche	Lower		2006			45	0.60	1.85
		Mid		2006	704386	1178808	4	0.50	2.50
		Upper		2006			52	0.67	2.46
	Turure	Lower		2003, 2004	700333	1178556	158	0.22	1.47
		Upper	1	2003			56	0.00	-
			2	2006	700442	1183253	16	0.00	-
			3	2003, 2004	700494	1180614	91	0.00	-
Pitch Lake	Pitch Lake	Lake	1	2004, 2006	650309	1131471	118	0.03	1.00	Trichodina (0.009),
	Pitch Lake	Lake	2	2006	650309	1131471	78	0.27	1.52	Ichthyophthirius (0.423), Digenean (0.013)
	Visigney	Lower		2009	650110	1129992	28	0.11	1.00	Fungus (0.036)
Silverstream	Silverstream	Lower		2006	657517	1129995	25	0.00	-
Silverstream	Silverstream	Mid		2006	656792	1128331	11	0.00	-	Trichodina (0.091), Fungus (0.273), Digenean (0.273)
Tarouba	Tarouba	Mid		2006	659331	1130492	12	0.00	-	Digenean (0.333)
Vance	Vance	Mid		2006	649782	1127854	35	0.09	1.00
Vance		Upper		2009	649751	1127459	42	0.02	1.00	Fungus (0.024)
Yarra	Yarra	Lower		2003	680414	1194065	58	0.52	2.07
Yarra		Upper		2004, 2006	683427	1189518	59	0.14	2.63	Camallanus nematode (0.017)
TOTAL							4715

Table A2. The top-ranked candidate models explaining variation in Gyrodactylus spp. abundance.

Model	Degrees of Freedom	Log Likelihood Ratio	AIC	ΔAIC	AIC weight
2/3/4/5/6/7/8	23	-4094.74	8235.49	0.00	0.69
1/2/3/4/5/6/7/8	24	-4094.56	8237.13	1.64	0.31

Note:AIC = Akaike information criteria value; the terms are coded as follows: 1: Presence of Trichodina; 2: Course; 3: Host class, 4: Year, 5: Weight, 6: Course:Host class, 7: Course:Weight; 8: Sex:Weight.

Table A3. Model averaged standardised coefficients, unconditional standard error, and 95% confidence intervals of model predictors for Gyrodactylus spp. abundance.

Predictor	Standardized coefficient	Unconditional SE	95% Confidence Intervals		Relative Importance of overall predictor
Predictor	Standardized coefficient	Unconditional SE	2.5%	97.5%	Relative Importance of overall predictor
(Intercept)	-0.561	0.873	-2.272	1.151
Course-lower	1.239	0.899	-0.522	3.000	Course = 1
Course-mid	1.515	1.026	-0.495	3.525
Course-upper	1.054	0.921	-0.751	2.859
Host class-j	1.037	0.633	-0.203	2.277	Sex = 1
Host class-m	-0.023	0.290	-0.590	0.545	Sex = 1
Year-2004	0.059	0.064	-0.065	0.184	Year = 1
Year-2006	0.801	0.067	0.669	0.933
Year-2008	1.095	0.169	0.764	1.426
Weight	0.672	0.431	-0.173	1.517	Weight = 1
lower:j	-1.014	0.629	-2.247	0.219	Course:Sex = 1
mid:j	-3.101	0.695	-4.463	-1.739
upper:j	-1.141	0.634	-2.383	0.101
lower:m	-0.111	0.295	-0.690	0.468
mid:m	-0.349	0.396	-1.124	0.427
upper:m	-0.062	0.303	-0.656	0.532
lower:weight	-0.249	0.436	-1.103	0.605	Course:Weight = 1
mid:weight	0.578	0.524	-0.448	1.604
upper:weight	-0.599	0.441	-1.463	0.264
j:weight	1.118	0.302	0.526	1.710	Sex:Weight = 1
m:weight	-0.066	0.154	-0.368	0.236	Sex:Weight = 1
Trichodina	0.068	0.113	-0.153	0.289	Trichodina = 0.31

Note: Predictors for which the confidence intervals do not bound zero are highlighted.

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