Seasonality and midscale spatial effects on Cichla ecology and fish species diversity in a neotropical floodplain river /
(Cichlidae) from the Cinaruco River in Venezuela from
| Main Author: | |
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| Format: | Thesis eBook |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1995.
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| Online Access: | Link to OAKTrust copy |
| Summary: | (Cichlidae) from the Cinaruco River in Venezuela from affinity for structured habitats in the main channel. Cichla areas. beach habitats. The order Characiformes comprised 68.5% of by comparing the ecology of resident piscivores and habitat channel and lagoon habitats. Cichla temensis was more consequently reproductive timing. Prey fishes from predator especially during the reproductive season, may disrupt adult families and 8 orders were found in lagoon and main river from otoliths, Cichla from the Cinaruco system can live up to had spawning peaks during the late low-water and early Hydrologic seasonality influenced prey availability, and low water and peak spawning activity. Based on annuli counts Management activities aimed at maintaining healthy Cichla November 1993 to June 1994. Cichla intermedia showed an numerically abundant but occurred in most collections. There numerically dominated by 1-3 species of small characids. numerous and significantly larger than the other two species. or side channel areas. Many fish species were never orinocensis and C. temensis were captured in both main otoliths revealed a slow growth period that coincided with Perciforms were more diverse in lagoon beaches than in main period than during rising water. All three species of Cichla reproductive success and survival of substrate-guarded young. rising-water periods. Marginal increment analysis of saggita samples, or among main river samples, suggesting little fine- scale habitat specialization for fishes inhabiting sand beach Seine collections from sand beach habitats revealed high seven years. Increased fishing pressure at the Cinaruco, species diversity. One hundred and five fish species from 22 stocks should be directed at protecting spawning adults. stomachs were significantly larger during the falling-water The influence of seasonal fluctuations in water levels on the species and 83.5% of the individuals. Most samples were tropical fish species from fluvial environments was evaluated use of prey fish within a floodplain river. Ecological data was little similarity in species assemblages among lagoon were collected for three species of sympatric Cichla |
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| Item Description: | "Major subject: Wildlife and Fisheries Sciences". Vita. |
| Physical Description: | x, 86 leaves : illustrations, maps ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references. |