Tilapia rendalli increases phytoplankton biomass of a shallow tropical lake

Silva, Lúcia Helena Sampaio da; Arcifa, Marlene Sofía; Salazar-Torres, Gian; Huszar, Vera L. M.

doi:10.1590/s2179-975x2014000400010

Cited by 11 publications

(6 citation statements)

References 59 publications

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“…The main food item of the fish fauna, in 1988-89 and 1998-99, was aquatic insects, with zooplankton representing a minor dietary item (Arcifa and Meschiatti, 1993;Meschiatti and . The planktivorous fish T. rendalli is diurnal, limnetic, not abundant, and did not cause a decrease in plankton abundance in mesocosm experiments (Silva et al, 2014).…”

Section: Study Areamentioning

confidence: 82%

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

et al. 2015

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INTRODUCTIONLong-term studies are essential for understanding ecological processes such as the influence of stressors and are basic for modeling, but are few in number because of their inherent difficulties, including costs (Jackson and Füreder, 2006;Maberly and Elliott, 2012). In particular, long-term studies of zooplankton can reveal the influence of past factors, including management decisions (Hambright, 2008). Some causes of changes in the zooplankton that are perceptible over a longer period include alterations of abiotic factors or predator invasion (Yan et al., 2008).The factors that affect the diversity and size of zooplankton species are intriguing issues, but still subject to controversy. From the classic paper by Brooks and Dodson (1965) to recent studies, several factors have been contemplated, and temperature has emerged as the preponderant factor for explaining latitudinal differences in zooplankton body size (Gillooly and Dodson, 2000). Gillooly and Dodson compared more than 1100 lakes located between 81°N and 77°S latitude, and found that the size variation of cladoceran species was related to latitude, with smaller sizes in the tropics and the Arctic and a greater difference between the tropics and the temperate zone. According to these authors, the highest mean sizes were observed between 6°C and 8°C, declining at higher or lower temperatures. Havens et al. (2015), comparing 122 lakes located from 6° to 74°N and from 19° to 21°S, showed a relationship between size (as weight) of cladocerans and cyclopoid copepods and temperature. In contrast, Iglesias et al. (2011) suggested that predation by fish is the major factor explaining the smaller size of zooplankton in warm lakes. Hart and Bychek (2011), in their extensive review of the many factors that could potentially influence zooplankton size, addressed extrinsic factors such as temperature, food and predation, amongst others, besides intrinsic ones. The authors concluded, however, that although a general pattern may occur, different results can arise from distinct ecosystems.J. Limnol., 2015; 74(3): 606-617 ORIGINAL ARTICLE DOI: 10.4081/jlimnol.2015DOI: 10.4081/jlimnol. .1132 A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

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Section: Study Areamentioning

confidence: 82%

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

et al. 2015

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“…The only planktivorous fish is the pump filter-feeder adult T. rendalli, which feeds mostly on phytoplankton (Arcifa & Meschiatti, 1993, 1996. It is not very abundant (Arcifa & Meschiatti, 1993), influencing phytoplankton mainly through nutrient excretion in comparison to grazing (Silva et al, 2014) and exerting a low pressure on zooplankton even in a higher density in mesocosms (1 fish/2.5 m 3 ) than in the lake (Silva, 2004).…”

Section: Introductionmentioning

confidence: 99%

Is competition an interaction as relevant as predation for tropical planktonic cladocerans?

2018

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Aim To test the relevance of competition and predation for the two most abundant and frequent cladoceran populations, the medium-sized Ceriodaphnia richardi Sars, 1901 and the large-sized Daphnia gessneri Herbst, 1967, in a tropical shallow lake. Methods Laboratory experiments and weekly samplings in the lake for a year were performed to evaluate: density fluctuations and reproduction; predation on juveniles and adults by larvae of Chaoborus brasiliensis Theobald, 1901; competitive interactions and possible implications of competition and predation on the fluctuations of populations in the lake. Juveniles and adults of both cladocerans were offered to larvae instar IV of chaoborid, for testing selective predation in laboratory experiment. Competitive interaction between the two cladocerans was tested in experiments, with high (0.70 mg C.L-1) and low (0.25 mg C.L-1) concentrations of the edible chlorophycean Desmodesmus spinosus Chodat. Results C. richardi and D. gessneri were more abundant in the cool season, when their densities were inversely correlated, and when invertebrate predators, C. brasiliensis and the water mite Krendowskia sp., were less abundant. Despite higher concentrations of food and larger number of offsprings produced by the cladocerans in the warm season in the lake, their densities were lower, coincident with the increase of invertebrate predators, mainly chaoborid larvae. C. brasiliensis preyed on adult C. richardi and on young D. gessneri. In the competition experiments, the densities and the population growth rates of C. richardi were higher than those of D. gessneri. The competition results support the “small body size” and the “rmax” hypotheses. The exclusion of D. gessneri by C. richardi occurred only in experimental conditions, while they coexist in the lake, but without reaching their carrying capacity. Conclusions Predation is the key factor influencing the populations of cladocerans, whereas competition seems to play a secondary role, probably restricted to some periods of lower food concentration in the cool season.

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“…Many studies have shown that filter-feeding planktivorous fish have a strong influence on phytoplankton dynamics and composition (Drenner et al, 1996;Lazzaro, 1997;Drenner et al, 1998;Zengeya & Marshall, 2007;Menezes et al, 2010;Silva et al, 2014b), but the relative importance of the mechanisms responsible for their effects on plankton remains unclear (Attayde & Hansson, 2001a, b;Figueredo & Giani, 2005;Attayde et al, 2010). These fish can reduce phytoplankton biomass through direct grazing (Zengeya & Marshall, 2007;Menezes et al, 2010), but can enhance algal biomass indirectly through predation on zooplankton (Carpenter & Kitchell, 1993) and/ or recycling and translocation of nutrients (Vanni, 2002, Silva et al, 2014b.…”

Section: Introductionmentioning

confidence: 99%

“…These fish can reduce phytoplankton biomass through direct grazing (Zengeya & Marshall, 2007;Menezes et al, 2010), but can enhance algal biomass indirectly through predation on zooplankton (Carpenter & Kitchell, 1993) and/ or recycling and translocation of nutrients (Vanni, 2002, Silva et al, 2014b. Therefore, the overall effect of filter-feeding fish on phytoplankton biomass can be either positive or negative, depending on the relative strength of each mechanism .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it can potentially control the biomass of cyanobacteria in eutrophic lakes and reservoirs (Datta & Jana, 1998;Beveridge & Baird, 2000;Lu et al, 2006). However, the few studies manipulating tilapia abundance and evaluating its effects on plankton have produced contradictory results (Starling et al, 2002;Figueredo & Giani, 2005;Attayde & Menezes, 2008;Okun et al, 2008;Rondel et al, 2008;Menezes et al, 2010, Silva et al, 2014b.…”

Section: Introductionmentioning

confidence: 99%

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Cyanobacteria are controlled by omnivorous filter-feeding fish (Nile tilapia) in a tropical eutrophic reservoir

et al. 2015

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Omnivorous filter-feeding fish are common in tropical lakes and reservoirs, and can potentially reduce phytoplankton biomass in eutrophic systems. The goal of this study was to evaluate direct grazing or indirect increase in phytoplankton biomass through the trophic cascade and fish-mediated nutrient recycling produced by Nile tilapia. Natural phytoplankton assemblages were incubated in permeable chambers placed inside mesocosms with and without fish. Outside these chambers (mesocosms), phytoplankton was exposed to effects from nutrient recycling by zooplankton and fish, and to grazing by these consumers. Inside the permeable chambers, phytoplankton was exposed only to nutrient recycling by zooplankton and fish. Our results showed that in mesocosms, cyanobacteria biomass was significantly reduced by fish; water transparency and ammonium concentrations also increased, but did not affect soluble reactive phosphorus concentrations or zooplankton biomass. Fish-mediated nutrient recycling did not enhance phytoplankton growth inside permeable chambers, because phytoplankton growth was limited in this study by phosphorus availability. The estimated grazing rates showed that tilapia were able to reduce approximately 60% of phytoplankton biomass (mostly cyanobacteria). Our data indicated that fish grazing was the mechanism controlling cyanobacteria biomass. This study provides evidence that Oreochromis niloticus has the potential to reduce cyanobacteria community in eutrophic reservoirs.

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Tilapia rendalli increases phytoplankton biomass of a shallow tropical lake

Cited by 11 publications

References 59 publications

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

A long-term study on crustacean plankton of a shallow tropical lake: the role of invertebrate predation

Is competition an interaction as relevant as predation for tropical planktonic cladocerans?

Cyanobacteria are controlled by omnivorous filter-feeding fish (Nile tilapia) in a tropical eutrophic reservoir

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