Effects of Reservoir Hydrology on Reproduction by Largemouth Bass and Spotted Bass in Normandy Reservoir, Tennessee

Sammons, Steven M.; Dorsey, Lawrence G.; Bettoli, Phillip W.; Fiss, Francis C.

doi:10.1577/1548-8675(1999)019<0078:eorhor>2.0.co;2

Cited by 48 publications

(45 citation statements)

References 23 publications

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“…Our results confirm this conclusion, and similar results have been obtained in reservoirs elsewhere in the USA, though they did not find such a close linkage between bass recruitment and SAV community structure as documented here. Sammons et al (1999), for example, found that in Normandy Reservoir, Tennessee, USA, the survival of young bass was positively related to water level, and suggested that this was due to inundation of peripheral wetland habitat.…”

Section: Largemouth Bass Recoverymentioning

confidence: 99%

Aquatic vegetation and largemouth bass population responses to water-level variations in Lake Okeechobee, Florida (USA)

et al. 2005

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A five-year study examined the responses of submerged aquatic vegetation (SAV), emergent vegetation, and largemouth bass (Micropterus salmoides) to variations in water level in a large lake in Florida, USA. SAV was assessed using a combined transect survey/spatial mapping approach, emergent vegetation was quantified with aerial photography and GIS, and bass were surveyed by electro-shocking. During the period leading up to this study (1995)(1996)(1997)(1998)(1999), water levels were high in the lake, and the SAV was reduced in spatial extent and biomass, compared to its condition in the early 1990s. Spatial extent of emergent vegetation also was low, and largemouth bass surveys indicated low densities and failure to recruit young fish into the population. This was attributed to the lack of critical vegetative habitat. In spring 2000, the lake was lowered by discharging water from major outlets, and this was followed by a regional drought. Water levels dropped by 1 m, and there was widespread development of Chara lawns in shoreline areas, with coincident increases in water clarity. There was some germination of vascular SAV, but Chara was the extreme dominant, such that structural complexity remained low. There was no substantive improvement in bass recruitment. During 2001, water levels declined further, and emergent plants germinated in exposed areas of the lake bottom. SAV was restricted to sites farther offshore, and continued to be dominated by Chara. There again was no bass response. In 2002, conditions changed when water levels increased to a moderate depth, flooding shoreline habitat to $0.5 m. Vascular SAV increased in biomass and spatial extent, such that the community developed a high structural complexity. At the same time, emergent aquatic plants developed dense stands along the western shoreline. Largemouth bass had a strong recruitment of young fish for the first time in 5 years. Recruitment continued to be successful in 2003, when spatial extent of SAV was somewhat reduced by higher water but total biomass and diversity remained high. These results demonstrate an important effect of inter-annual variation in water depth on the population dynamics of aquatic plants and fish in a subtropical lake.

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Section: Largemouth Bass Recoverymentioning

confidence: 99%

Aquatic vegetation and largemouth bass population responses to water-level variations in Lake Okeechobee, Florida (USA)

et al. 2005

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“…Even if the impacts of reservoir filling are reduced with time, water level fluctuations, often due to dam operation, may continue to disrupt fish assemblages (Agostinho et al 1999;Beklioglu et al 2006). Rising water levels expand the littoral zone of reservoirs, and may increase shelter and food availability and improve fish condition and reproductive success (Sammons et al 1999;Sutela et al 2002;Santos et al 2004). Drawdowns often worsen fish condition, heighten biotic interactions, and may increase fish mortality, through impairment of water quality, destruction of littoral habitats, and exposition of eggs to desiccation (Piet 1998;Yamamoto et al 2006;Benejam et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Artificial macrophytes as fish habitat in a Mediterranean reservoir subjected to seasonal water level disturbances

et al. 2010

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Artificial macrophytes were experimentally deployed in Boadella Reservoir (NE Spain) and assessed for fish use throughout the first 3 months of the 2007 summer drawdown. In total, 1,832 individuals of seven fish species were recorded through visual censuses, with introduced perch Perca fluviatilis being the prevalent species. Fish richness and abundance were significantly higher in artificial macrophytes than in rocky shores and sandy beaches, displaying a unimodal variation through time. P. fluviatilis, Rutilus rutilus and Abramis brama were significantly more abundant in artificial macrophytes than in the other two naturally submersed habitats, where no individuals of these species were recorded. The abundances of Squalius laietanus, Lepomis gibbosus, Micropterus salmoides and Cyprinus carpio were overall greater in artificial macrophytes than in rocky shores but displayed significant habitat 9 time interactions. A decrease in predation risk was apparently the key-factor of the intensive use of artificial macrophytes by small fish (B100 mm TL) in Boadella Reservoir, since most species reduced drastically or completely the use of submerged structures when body size increased. This study demonstrates that adding artificial structures mimicking aquatic macrophytes can be an interesting tool to mitigate the adverse effects of water level fluctuations on fish assemblages in structure-less and homogeneous ecosystems, and to understand the mechanisms affecting habitat use and species replacement.

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“…In the Lajes reservoir, annual water level fluctuations averaged nearly 3.0 m between high and low water, but such difference can reach up to 12.0 m in years of extreme variation. High water levels have been associated with high food supply and shelter availability, favouring early life stages development, whereas low water levels are associated with eggs and larvae exposure triggering intense mortalities (Maceina and Stimpert 1998;Sammons et al 1999).…”

Section: Discussionmentioning

confidence: 99%

Opportunistic reproductive strategy of a non-native fish, the spotted metynnisMetynnis maculatus(Kner, 1858) (Characidae Serrasalminae) in a tropical reservoir in south-eastern Brazil

et al. 2012

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We investigated the reproductive strategy developed by the non-native fish Metynnis maculatus (Kner, 1858) to explain its success in establishing in a tropical reservoir in south-eastern Brazil. A total of 198 specimens were examined, 100 males (total length, TL ¼ 110-172 mm) and 98 females , collected using gill nets from September 2005 to August 2006. Sex ratio is balanced, although females significantly outnumber males in size larger than 160 mm TL. Six stages of oogenesis and five of spermatogenesis are described, based on staining aspect of the nucleus and cytoplasm structure with photonic microscopy. A protracted reproductive period from August to January was found with females producing several large clutches of small eggs. Oocyte mean diameter ranged from 19.6-48.3 mm in previtellogenic ovarian stage to 83.4-149.4 mm in vitellogenic ovarian stage whereas in spawning stage ovary, oocyte diameter varied from 300 to 500 mm. In ripe stage, oocytes can reach diameter up to 2.00 mm. Batch fecundity ranged from 670 to 16,333 oocytes (mean fecundity ¼ 7056 oocytes) for females having TL ranging from 145 to 191 mm and total weight ranging from 75 to 176 g. A tendency for opportunistic strategy was detected as indicated by a long spawning period, high fecundity, small oocytes and small body size that have proved to be effective in the Lajes reservoir.

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Effects of Reservoir Hydrology on Reproduction by Largemouth Bass and Spotted Bass in Normandy Reservoir, Tennessee

Cited by 48 publications

References 23 publications

Aquatic vegetation and largemouth bass population responses to water-level variations in Lake Okeechobee, Florida (USA)

Aquatic vegetation and largemouth bass population responses to water-level variations in Lake Okeechobee, Florida (USA)

Artificial macrophytes as fish habitat in a Mediterranean reservoir subjected to seasonal water level disturbances

Opportunistic reproductive strategy of a non-native fish, the spotted metynnisMetynnis maculatus(Kner, 1858) (Characidae Serrasalminae) in a tropical reservoir in south-eastern Brazil

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