Reversed Diel Horizontal Migration of Fish: Turbidity Versus Plant Structural Complexity as Refuge

Pekcan‐Hekim, Zeynep; Nurminen, Leena; Ojala, Tuuli; Olin, Mikko; Ruuhijärvi, Jukka; Horppila, Jukka

doi:10.1080/02705060.2010.9664414

Cited by 10 publications

(5 citation statements)

References 27 publications

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“…Macrophyte cover can reduce fish–prey encounter rates by adding physical barriers (Clemente et al, 2019; Meerhoff et al, 2007), whereas turbidity influences the reaction distance between fish and their prey by its negative impact on visibility (Snickars et al, 2004). However, the effect of increased turbidity on predation is supposed to be stronger than the effect of macrophyte cover (Carter et al, 2010; Pekcan‐Hekim et al, 2010); thus, when visibility is as reduced as observed in the more eutrophic lakes, predators may have switched to other means of finding prey or to foraging elsewhere (Figueiredo et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…However, the effect of increased turbidity on predation is supposed to be stronger than the effect of macrophyte cover (Carter et al, 2010;Pekcan-Hekim et al, 2010); thus, when visibility is as reduced as observed in the more eutrophic lakes, predators may have switched to other means of finding prey or to foraging elsewhere (Figueiredo et al, 2013).…”

Section: Relationships Between Fish Attributes and Chla Concentrationmentioning

confidence: 99%

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Associations between submerged macrophytes and fish communities at two spatial scales in 88 temperate shallow lakes

et al. 2023

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Fish community structure is affected by a range of lake characteristics, including the cover of macrophytes that provide spawning habitats, nursery area, refuge against predators, and food. We assessed fish–macrophyte relationships at both lake and point scale using an extensive dataset from 88 Danish shallow lakes (maximum depth ≤4.5 m). At lake scale, we used mean values from fish and macrophyte community samples for all lakes, in total 88 samples. The point scale data were derived from multiple points in each lake (in total 595 samples) where both macrophytes and fish were sampled, allowing us to assess within‐lake variations. We found generally negative relationships between macrophyte cover and fish abundance and biomass, which was strongest at point scale. Contrary to macrophytes, chlorophyll a showed positive relationships with fish abundance—except for perch and all fish <10 cm, which did not show significant relationships. The deeper and more eutrophic the lakes, the more the fish tended to occupy points covered by macrophytes. The abundances of species such as roach and bream were negatively related to macrophyte cover, but, for perch, this relationship was not significant. Our results suggest that fish abundance and biomass were associated with a combination of factors that are often intercorrelated and difficult to isolate. The relationship between fish abundance and biomass and macrophyte cover may depend on, among other factors, fish species, fish size, and the characteristics of the individual lakes.

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Section: Discussionmentioning

confidence: 99%

Section: Relationships Between Fish Attributes and Chla Concentrationmentioning

confidence: 99%

Associations between submerged macrophytes and fish communities at two spatial scales in 88 temperate shallow lakes

et al. 2023

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“…Interacting effects of habitat complexity and food web structure. Interestingly, habitat complexity interacts with lake characteristics such as water transparency (Snickars et al, 2004;Pekcan-Hekim et al, 2010) and trophic web characteristics. Rennie & Jackson (2005) demonstrated that small-scale variation in littoral microhabitat complexity shapes patterns of macroinvertebrate distribution but also that such effects were systematically different in the presence or absence of fish (i.e., greater complexity promoted higher density of invertebrates only in the presence of fish), suggesting that habitat complexity effects are at least partly mediated through top-down mechanisms.…”

Section: Future Directionsmentioning

confidence: 99%

Habitat complexity in shallow lakes and ponds: importance, threats, and potential for restoration

Meerhoff

Sagrario

2021

Hydrobiologia

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In this review we describe patterns and mechanisms by which habitat complexity is crucial for the functioning of shallow lakes and ponds, and for the abundance and diversity of biological communities in these ecosystems. Habitat complexity is affected by processes acting at different spatial scales, from the landscape to the ecosystem level (i.e., morphometric attributes) that generate different complexities, determining the potential for organisms to succeed and processes to occur, such as energy and nutrient transfer, and fluxes of greenhouse gases, among others. At the local scale, the three major habitats, pelagic, littoral, and benthic, are characterised by different degrees of structural complexity and a particular set of organisms and processes. Direct and indirect effects of changes in within-lake habitat complexity can either hinder or promote regime shifts in these systems. We also review several anthropogenic pressures (eutrophication, urbanisation, introduction of exotic species, and climate change) that decrease lake resilience through changes in habitat complexity and strategies for habitat complexity restoration. Overall, we emphasize the need to preserve and/or restore habitat complexity as key challenges to account for ecosystem integrity, maintenance of local/regional biodiversity, and for the provision of crucial ecosystem services (e.g., biodiversity, self-purification, and carbon sequestration).

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“…Distribution and abundance of juvenile fishes is therefore usually positively correlated with the presence of aquatic plants (Comeau & Boisclair, 1998; Gaudreau & Boisclair, 1998; Jůza et al, 2018). Nonetheless, aquatic plants can provide safety only to a certain limit that depends on water turbidity (Pekcan‐Hekim et al, 2010), abundance of plant cover and presence and type of predators (Savino & Stein, 1989; Snickars et al, 2004). In high plant densities, juvenile fish can be safe from predators accustomed to hunting in open water but not so from ambush predators capable of manoeuvring in dense vegetation (Jacobsen & Perrow, 1998).…”

Section: Introductionmentioning

confidence: 99%

The effect of littoral complexity on the diel distribution of early juvenile fish communities in temperate freshwater reservoirs

Sajdlová

Jůza

Draštík

et al. 2023

Ecology of Freshwater Fish

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The diel distribution of early juvenile fish communities from two temperate freshwater reservoirs that differed in cover of submerged aquatic vegetation was investigated. In the daytime, about 99.9% of the juvenile fish community from the plant‐rich Žlutice Reservoir was found in the nearshore belt of submerged aquatic vegetation reaching an average abundance of ~7982 inds. 1000 m−3. In contrast, in the pelagic habitat, few fish were found at day. In the plant‐poor Římov Reservoir, 98.9% of juveniles occupied the pelagic habitat during daytime and reached an average abundance of ~333 inds. 1000 m−3. Vertical distribution of fish in the pelagic habitat in both water bodies was affected by steep thermal and oxygen stratification and no individuals occurred below 6 m depth. At night, 88.8% of the juvenile fish community from the plant‐rich Žlutice Reservoir was in the pelagic habitat with an average abundance of ~1423 inds. 1000 m−3. Their diel horizontal shifts were much more pronounced compared to the community from the Římov Reservoir that reached an average nighttime pelagic abundance of ~523 inds. 1000 m−3. Only 1.1% of the juvenile fish community in the Římov Reservoir was found in the littoral during the daytime and 0.7% at night reaching an average daytime abundance of ~1688 inds. 1000 m−3 and average nighttime time abundance of ~1664 inds. 1000 m−3. This study indicates that if a well‐developed littoral zone with abundant aquatic vegetation is present, early juvenile fish will perform diel horizontal movement in temperate stratified reservoirs.

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Reversed Diel Horizontal Migration of Fish: Turbidity Versus Plant Structural Complexity as Refuge

Cited by 10 publications

References 27 publications

Associations between submerged macrophytes and fish communities at two spatial scales in 88 temperate shallow lakes

Associations between submerged macrophytes and fish communities at two spatial scales in 88 temperate shallow lakes

Habitat complexity in shallow lakes and ponds: importance, threats, and potential for restoration

The effect of littoral complexity on the diel distribution of early juvenile fish communities in temperate freshwater reservoirs

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