Ecological Archives M076-002-A4

**Julian D. Olden, N. LeRoy Poff, and Kevin R. Bestgen. 2006. Life-history strategies predict fish invasions and extirpations in the Colorado River Basin. Ecological Monographs 76:25–40.**

Appendix D. Distributional changes for native and nonnative fishes of the lower Colorado River Basin estimated using the SONFISHES database.

TABLE D1. Distributional changes for native (n = 23) and nonnative (n = 47) fishes of the lower Colorado River Basin estimated using the SONFISHES database (see Methods in main article for details). See Notes at end of table for details.

Native species	Decline(%)	Nonnative species	Spread (km/yr)

Catostomidae		Catostomidae
Catostomus clarkii	14	Catostomus plebeius	0.3
Catostomus discobolus	4	Ictiobus bubalus	0.1
Catostomus insignis	-8	Ictiobus cyprinellus	0.2
Catostomus latipinnis	62	Ictiobus niger	0.0
Xyrauchen texanus	50
		Centrarchidae
Cyprinidae		Ambloplites rupestris	1.8
Gila cypha	-6	Lepomis gulosus	0.0
Gila elegans	88	Lepomis cyanellus	62.9
Gila intermedia	16	Lepomis macrochirus	23.4
Gila nigra	-12	Lepomis microlophus	3.6
Gila robusta	6	Micropterus dolomieui	18.0
Lepidomeda mollispinis	55	Micropterus punctulatus	0.0
Lepidomeda vittata	-14	Micropterus salmoides	34.2
Meda fulgida	46	Pomoxis annularis	0.8
Moapa coriacea^†	100	Pomoxis nigromaculatus	8.3
Plagopterus argentissimus	79
Ptychocheilus lucius	100	Cichlidae
Agosia chrysogaster	-11	Herichthys cyanoguttatus	5.5
Rhinichthys osculus	17	Archocentrus nigrofasciatus	0.0
Rhinichthys cobitis	18	Oreochromis aureus	20.7
		Oreochromis mossambica	3.2
Cyprinodontidae		Tilapia zilli	3.1
Cyprinodon macularius^†	100
		Clupeidae
Poeciliidae		Dorosoma petenense	15.8
Poeciliopsis occidentalis	37
		Cyprinidae
Salmonidae		Carassius auratus	10.6
Oncorhynchus gilae apache	27	Ctenopharyngodon idellus	0.0
Oncorhynchus gilae gilae	84	Cyprinella lutrensis	54.6
		Cyprinus carpio	19.9
		Notemigonus crysoleucus	12.7
		Pimephales promelas	74.1
		Richardsonius balteatus	3.8

		Esocidae
		Esox lucius	4.0

		Fundulidae
		Fundulus zebrinus	9.0

		Ictaluridae
		Ameiurus melas	8.1
		Ameiurus natalis	20.4
		Ameiurus nebulosus	0.0
		Ictalurus punctatus	22.0
		Pylodictis olivaris	23.7

		Moronidae
		Morone chrysops	0.2
		Morone mississippiensis	1.5
		Morone saxatilis	11.9

		Percidae
		Perca flavescens	0.0
		Sander vitreus	5.7

		Poeciliidae
		Gambusia affinis	37.9
		Poecilia latipinna	7.9
		Poecilia mexicana	0.4
		Poecilia reticulate	1.6

		Salmonidae
		Oncorhynchus mykiss	18.0
		Salmo trutta	11.0
		Salvelinus fontinalis	7.4
		Thymallus arcticus	5.3

Notes: Values are presented as percentage declines in distribution: positive values represent distribution declines and negative values represent distribution expansion. Nomenclature follows Nelson et al. (2004). Note: (1) cutthroat trout (Oncorhynchus clarkii) is native to the upper basin but nonnative to the lower basin and was not included in the analysis; (2) if a species was recorded in a stream segment post-1980 and was absent from the segment pre-1980, the species was considered to be historically absent. Importantly, this method will produce lower estimates of native species decline compared to estimates assuming historically presence.

† C. macularius and M. coriacea are not extinct from the lower basin, but are estimated as exhibiting a 100% decline because the database does not contain recent records of their occurrence.

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