Relationship between Morphometry of Excavated Floodplain Ponds along the Mississippi River and Their Use as Fish Nurseries

Sabo, Matthew J.; Kelso, William E.

doi:10.1577/1548-8659(1991)120<0552:rbmoef>2.3.co;2

Cited by 35 publications

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“…The importance of the connection of the floodplain lakes with the main river and the occurrence of floods that reach the disconnected lagoons was already evidenced in various studies of fish assemblages (Sabo & Kelso, 1991;Súarez et al, 2004;Amoros & Bornette, 2002;King et al, 2003;Petry et al, 2003Petry et al, , 2004Pompeu & Godinho, 2006;Gubiani et al, 2007). However, specific studies that showed this same pattern for fish larvae assemblages were scarce.…”

Section: Discussionmentioning

confidence: 96%

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

et al. 2009

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The objective of this study was to assess the abundance, attributes of assemblages, and spatial and temporal distributions of fish larvae and their relationships with some abiotic variables in two floodplain lakes with different degrees of connection to the Paraná River in Ilha Grande National Park, PR, Brazil. Four sampling sites were chosen, two in each floodplain lake. Night samples were taken with plankton nets during three spawning seasons (monthly, from October to March) from 2001 to 2005. The highest diversity and abundance were recorded at Saraiva Lake, with 25 taxa being identified. In Xambrê Lake, only sedentary species were captured, and the most abundant species were Plagioscion squamosissimus and Hypophthalmus edentatus. The greatest abundance of larvae was found in the second spawning season. In the Saraiva Lake, the most abundant species were Moenkhausia aff. intermedia, Hyphessobrycon sp., and Bryconamericus stramineus, but larvae of known migratory species were also documented. In this lake, the greatest abundance of larvae was found in the third spawning. Larvae abundance was influenced by water temperature and conductivity. The high diversity and abundance recorded in Saraiva Lake may be a result of its connectivity with the Paraná River, and the low diversity and abundance observed at Xambrê Lake are likely due to its isolation from the river. This work shows the importance of these lagoons for fish development, for both sedentary and migratory species. Both lagoons may be considered to have extreme ecological importance and they are also extremely susceptible to impacts, so any careless disturbance may cause irreversible damage.Este trabalho teve por objetivo avaliar a abundância, os atributos da assembleia e a distribuição espacial e temporal de larvas de peixes, bem como a relação dessas variáveis com alguns fatores abióticos, em duas lagoas com diferentes graus de conexão com o rio Paraná, Parque Nacional de Ilha Grande, PR, Brasil. As amostragens foram realizadas em quatro locais, dois em cada lagoa. As coletas foram realizadas mensalmente à noite durante três períodos de desova (outubro a março) de 2001 a 2005, com o auxílio de redes de plâncton. A maior diversidade e abundância foram verificadas na lagoa Saraiva, sendo identificados 25 táxons. Na lagoa Xambrê somente foram capturadas espécies sedentárias e as mais abundantes foram Plagioscion squamosissimus e Hypophthalmus edentatus. Nessa lagoa as maiores ocorrências foram verificadas no período II. Na lagoa Saraiva as maiores capturas foram de Moenkhausia aff. intermedia, Hyphessobrycon sp. e Bryconamericus stramineus, entretanto, larvas de espécies migradoras também foram registradas. Nessa lagoa, as maiores ocorrências foram no período III. A abundância de larvas foi influenciada pela temperatura da água e pela condutividade elétrica. A elevada diversidade e abundância registradas na lagoa Saraiva podem ser atribuídas a sua conectividade com o rio Paraná, enquanto que a baixa diversidade e abundância observadas na lagoa Xambrê pode...

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Section: Discussionmentioning

confidence: 96%

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

et al. 2009

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“…Many juvenile riverine fishes were thought to have historically used these floodplains as nurseries (Sabo and Kelso 1991). Models for the reconnection and sustainable use of floodplains have been described (e.g., Opperman et al 2009;Thorp et al 2010) and could be considered in recovery efforts.…”

Section: Sturgeon-specific Considerationsmentioning

confidence: 99%

Considering a species-loss domino-effect before endangered species legislation and protected area implementation

Hintz

Garvey

2012

Biodivers Conserv

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Regulatory legislation by governments is essential for facilitating the recovery of endangered or threatened species. Protecting commercially exploited species, in particular, requires painstaking cooperation among vested parties. However, rules protecting one species may be detrimental to others. If an exploited species is only protected in a portion of its range, exploitative efforts may divert to unprotected portions or similarly valuable species. As a result, the good intentions of protecting species in a limited fashion may manifest a species-loss domino-effect. We illustrate a species-loss domino-effect using a current example from the Mississippi River basin of the United States, where roe fisheries (for caviar) have cascaded because of strict regulations and collapses of sturgeon stocks in Europe and Asia. In the Mississippi River basin the limited protection of a commercially important sturgeon species may increase exploitation in unprotected river reaches and threaten other economically important fishes. Although a species-loss dominoeffect is delineated herein using an example from a freshwater fishery in the central United States, the concept should be considered and applied to terrestrial and marine species worldwide.

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“…For example, amphibians in ephemeral ponds (Wellborn and others 1996), fish in streams (Schlosser 1991;Fausch and others 2002), cavity nesting birds in dead and dying trees (Martin and Eadie 1999), chickadees (Lima 1985), and large grazing mammals (Walters 2001) all appear to exhibit metapopulation dynamics that could also vary both spatially and temporally. In floodplain rivers, although only the bluegill was examined in this study, a large number of other motile riverine organisms purportedly share this same metapopulation dynamic and are therefore also faced with similar trade-offs (for example, Sabo and Kelso 1991;Meschiatti and others 2000;Slipke and others 2005).…”

Section: Discussionmentioning

confidence: 97%

Spatial and Temporal Trade-Offs by Bluegills in Floodplain River Ecosystems

2012

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Ecological trade-offs by organisms to minimize mortality and maximize growth is a foundational theme in ecology. Yet, these trade-offs are rarely examined within spatially complex, temporally variable ecosystems, such as floodplain rivers. Here, we evaluate ecological trade-offs across space and time for the bluegill (Lepomis macrochirus) in two unregulated river ecosystems in southeastern USA. Life-history differences among spatially segregated main channel and floodplain lake populations were used to assess effects of habitat type on bluegill fitness. Growth, condition, and gonadal somatic index were all significantly enhanced in floodplain lakes relative to the main channel. Furthermore, stomach fullness was significantly higher, and predator densities significantly lower in floodplain lakes thereby providing an ecological explanation for the life-history plasticity observed across the riverscape. However, historical observations suggested that although floodplain lakes are highly productive for bluegills, they are also prone to complete desiccation by drought approximately every 5 years, revealing the ultimate value of channel habitat, which does not dry, as desiccation refugia. Bluegills are faced with a balancing act associated with variation in foraging opportunities, and risks to predation and desiccation, that change in both the temporal and the spatial dimensions of floodplain rivers. The differential responses to these opportunities and risks help to explain why both habitats remain actively populated by bluegills, as well as many other organisms, in these and many other natural rivers.

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Relationship between Morphometry of Excavated Floodplain Ponds along the Mississippi River and Their Use as Fish Nurseries

Cited by 35 publications

References 0 publications

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil

Considering a species-loss domino-effect before endangered species legislation and protected area implementation

Spatial and Temporal Trade-Offs by Bluegills in Floodplain River Ecosystems

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