Composition, structure, and habitat associations of fish assemblages of the Dolan Falls Preserve /
(PCA). Seasonal shifts in assemblage structure were
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | (PCA). Seasonal shifts in assemblage structure were and Dionda diaboli versus domination by Micropterus dolomieu, assemblage composition in combination with a set of CANCOR, for both community variables and environmental composition were examined using principal component analysis convergence of many species on a subset of mesohabitats correspondence analysis (CANCOR) was performed using cyanoguttatum. In addition to the PCA, canonical Cyprinalla Proserpina, Cyprinella venusta, and Cichlasoma Cyprinodon eximius. Spatiotemporal patterns of taxonomic Department were among the most abundant species during this dominated. during colder periods. Diverse reproductive strategies are environmental parameters. The first three axes of the first pair of canonical axes described a pattern in which fish (Poecilidae). Species composition in this study was found that have not been reported before, and nine species Four species listed as threatened by Texas Parks and Wildlife least diverse were the shallow isolated pools dominated by Moxostoma congestum, Etheostoma grahami, Cyprinodon eximius, period. Data were analyzed to explore natural variation at Preserve were quantified in four surveys over a one-year previously reported were not observed during this study. primarily with respect to an axis contrasting domination by relatively large variation between mesohabitats and between represented in the fish community of the Devil's River, but seasonal variation in assemblages was associated with the seasons within mesohabitats. The most diverse mesohabitats similar to that reported previously. Three species were small opportunistic species with extended spawning periods stations of the Devil's River at the Texas Nature Conservancy survey. Species diversity (H') and fish abundances showed The composition and stability of fish assemblages at eight the mesohabitat scale in the system. The local fish fauna variables, accounted for 90.7% of the total variance. The was dominated by four minnows (Cyprinidae) and one mosquito were pool, channel, channel edge, and riffle, whereas the |
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| Item Description: | "Major subject: Wildlife and Fisheries Sciences". Vita. |
| Physical Description: | xii, 69 leaves : illustrations, maps ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |