Hypoxic conditions enhance refuge effect of macrophyte zone for small prey fish from piscivorous predators

Yamanaka, Hiroki

doi:10.1111/fme.12033

Cited by 9 publications

(6 citation statements)

References 46 publications

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“…In response, sometime after dark trahiras (Hoplias spp.) leave their daytime feeding grounds (Saint-Paul & Soares, 1987;Frodge et al, 1990;Yamanaka, 2013).…”

Section: Discussionmentioning

confidence: 99%

On the relation amongst limnological factors and fish abundance in reservoirs at semiarid region

et al. 2015

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Aim:To evaluate possible nycthemeral and seasonal temporal patterns in fish assemblage associated with limnological aspects and biotic factors in two reservoirs in semarid Northeastern Brazil.MethodsFish were sampled with gillnets in nycthemeral cycles throughout the dry and rainy season in two reservoirs (Paulo Sarasate/PS and Edson Queiroz/EQ). The stomach contents of the predator species were surveyed. The limnological variables were submitted to principal components analysis, while their relation to fish abundance was determined by canonical correspondence analysis. Temporal patterns in relative fish species abundance were detected with nMDS.ResultsTemperature and dissolved oxygen levels segregated the reservoirs physico-chemically. Turbidity and chlorophyll-a levels differed between seasons, and the relative abundance of species differed between the reservoirs. Predators were more abundant in PS, while detritivores were more abundant in EQ. Triportheus signatusand Plagioscion squamosissimus were the most abundant species in both reservoirs. In general, predator abundance was positively associated with high temperature and dissolved oxygen (PS>EQ) and negatively associated with turbidity. The activity patterns of P. squamosissimus could not be explained by fluctuations in environmental variables. Non-predators tended to cluster around the vectors chlorophyll-a, pH and turbidity. Predators had a more diversified diet in PS in accordance with food availability, while predators in EQ ate only fish and shrimp. Nycthemeral patterns varied for the same species depending on the reservoir. Generally, in PS predators were more active during daylight hours while non-predators were more active after dark. However, in EQ predators and non-predators displayed similar nycthemeral activity patterns. Regardless of the reservoir, predators were more abundant in the rainy season. No seasonal trend was observed for non-predators.ConclusionsLimnological differences between PS and EQ influenced temporal species abundance patterns. The species distribution was determined by predation conditions and physiological attributes.

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“…In response, sometime after dark trahiras (Hoplias spp.) leave their daytime feeding grounds (Saint-Paul & Soares, 1987;Frodge et al, 1990;Yamanaka, 2013).…”

Section: Discussionmentioning

confidence: 99%

On the relation amongst limnological factors and fish abundance in reservoirs at semiarid region

et al. 2015

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“…Predominantly warm [33][34][35][36][37][38], eutrophic [21,[39][40][41][42], and lentic [9,37,[43][44][45] waters. Submerged plants [9,19,21,33,[45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61], woody debris, or underwater structures [48,[62][63][64][65][66].…”

Section: Habitatmentioning

confidence: 99%

Biological Invasions in Fresh Waters: Micropterus salmoides, an American Fish Conquering the World

Costantini,

Kabala,

Sporta Caputi

et al. 2023

Water

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Biological invasions in fresh waters cause biodiversity loss and impairment of ecosystem functioning. Many freshwater invasive species are fish, including the largemouth bass Micropterus salmoides, which is considered one of the 100 worst invasive species in the world. Fast individual growth rates, high dispersal ability, ecological tolerance, and trophic plasticity are among the characteristics contributing to its success. The negative impact of M. salmoides on littoral fish communities is believed to be mitigated by habitat structural complexity resulting from aquatic vegetation and coarse woody debris, while the main limits on its spread seem to be strong water flows and high turbidity, which impairs visual predation. Together with the human overexploitation of its potential fish antagonists, habitat alteration could result in M. salmoides having seriously detrimental effects on native biodiversity. The purpose of this study is to critically review the life history and ecology of M. salmoides, its impact on ecosystems outside North America, and the effects of anthropogenic activities on its spread. This will highlight environmental factors that favor or limit its invasive success, helping to identify management measures that might mitigate its negative effects on freshwater biodiversity.

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“…macrophytes, coarse woody debris) that mediates competition and predation (Diehl 1988;Savino and Stein 1989;Beauchamp et al 1994;Lewin et al 2004). For example, macrophyte assemblages offer a variety of meso-and microhabitats including transient heterogeneous DO and temperature refugia (Miranda et al 2000) that can harbor distinct fish size-classes (Chick and McIvor 1994;Yamanaka 2013), high fish densities (Keast 1978;Hugh Barwick 2004;Randall et al 2012), and high species richness (Keast 1978;Pratt and Smokorowski 2003;Hugh Barwick 2004) compared to other littoral mesohabitats. Declines in fish diet, growth rate, biomass, and abundance correlate with reduced littoral physical habitat complexity (Bettoli et al 1993;Sass et al 2006).…”

Section: Fish Responsesmentioning

confidence: 99%

Ecological impacts of winter water level drawdowns on lake littoral zones: a review

2017

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with r-selected life history strategies and with functional traits resistant to direct and indirect drawdown effects. Fish assemblages, though less directly affected by winter drawdowns (except where there is critically low dissolved oxygen), experience negative effects via indirect pathways like decreased food resources and spawning habitat. We identify eight general research gaps to guide future research that could improve our understanding about the complex effects of winter drawdowns on littoral zone ecology.

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Hypoxic conditions enhance refuge effect of macrophyte zone for small prey fish from piscivorous predators

Cited by 9 publications

References 46 publications

On the relation amongst limnological factors and fish abundance in reservoirs at semiarid region

On the relation amongst limnological factors and fish abundance in reservoirs at semiarid region

Biological Invasions in Fresh Waters: Micropterus salmoides, an American Fish Conquering the World

Ecological impacts of winter water level drawdowns on lake littoral zones: a review

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