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Mesocyclops; adults; animals; bioassays; chronic toxicity; freshwater; metamorphosis; nauplii; new species; pentachlorophenol; summer; survival rate; temperature; New Zealand
Abstract:
... The suitability for laboratory culture and comparative sensitivity of three species of New Zealand freshwater copepod (Calamoecia lucasi Brady, Boeckella delicata Percival, and Mesocyclops cf. leuckarti Claus) to pentachlorophenol (PCP) was assessed. Acute bioassays used two life stages (nauplii and adults). Acute 48-h lethality tests were conducted at 22 degrees C with laboratory cultured animals ...
Acanthobrama; Mesocyclops; Peridinium; adults; biomass; body size; data analysis; fisheries; hysteresis; lakes; models; phosphorus; physicochemical properties; phytoplankton; predation; spring; water temperature; winter; zooplankton; Israel
Abstract:
... 1. Through analyses of a 34-year record of phytoplankton, zooplankton and physicochemical parameters from Lake Kinneret, Israel, we show that distinct and persistent phytoplankton assemblage states occurred from winter to summer. 2. The most obvious characteristic of these states was the presence or absence of a spring bloom of the dinoflagellate, Peridinium gatunense. 3. Analyses of the data with ...
Mesocyclops; appendages; body size; lakes; ponds; predation; risk
Abstract:
... Cyclopoid copepods are common in lakes and ponds, and they have a significant predation impact on the communities of the small zooplankton species. To reduce the predation risk, some cladoceran zooplankters develop protuberant (defensive) morphologies in the presence of the copepods. In the case of the small cladoceran Bosmina, they elongate their appendages (antennule and mucrone) and change the ...
... The municipal sewage of Calcutta city together with industrial effluents traversed the East Calcutta Wetlands (ECW) (Ramsar Site No. 1208) for nearly a century. The composite wastewater at the ECW, was used for pisciculture and agriculture after natural stabilization. Such uses have always been thought to be a source of contamination to biota and humans. Some water-borne pollutants generate reacti ...
Mesocyclops; basins; eggs; females; introduced species; District of Columbia; Lake Erie; Louisiana; Mississippi
Abstract:
... The Asian cyclopoid copepod Mesocyclops pehpeiensis Hu, 1943 has been reported as an introduced species at several locations in the western hemisphere. In the United States, reports of this exotic species are restricted to localities in Louisiana, Mississippi, and Washington D.C. This report documents a new record of occurrence for M. pehpeiensis from the western basin of Lake Erie. The detection ...
Escherichia coli; Mesocyclops; air; chlorine; cholera; defecation; humans; indigenous species; microbiological quality; models; pH; risk assessment; sludge; soil; stormwater; surveys; water pollution; water supply; well water; wet season; Cameroon
Abstract:
... The present study aimed to assess the risk factors responsible for cholera endemism in the health area of Doualare (Far North, Cameroon) where a prevention program is implemented. The investigation of groundwater used for human consumption resulted in detection of bacterial concentrations ranging from 2.04x 104 to 3.15x 105 CFU/mL for Heterotrophic Aerobic and Mesophilic Bacteria (HAMB), 3.10±0.02 ...
... Larvicidal activity of synthesized Ag nanoparticles using 2,7.bis[2-[diethylamino]-ethoxy]fluorence isolate from the Melia azedarach leaves against Aedes aegypti and Culex quinquefasciatus. Six fractions were collected and concentrated, fraction three showed a single spot on TLC which was found to be a pure compound. The structures were elucidated by analyses of UV, MS, and NMR spectral data. The ...
Uejio Christopher K.; Hayden Mary H.; Zielinski-Gutierrez Emily; Lopez Jose Luis Robles; Barrera Roberto; Amador Manuel; Thompson Gregory; Waterman Stephen H.
... Dengue periodically circulates in southern Texas and neighboring Tamaulipas, Mexico; thus, a closer examination of human and vector ecology at the northern limits of North American transmission may improve prevention activities. Scrap tires produce large mosquito populations and increase the risk of dengue transmission. Some households choose not to pay tire disposal fees, and many tires are illeg ...
... Aedes albopictus is an important arbovirus vector, including dengue. Currently, there is no specific treatment for dengue. Its prevention solely depends on effective vector control measures. In this study, silver nanoparticles (AgNPs) were biosynthesized using a cheap leaf extract of Berberis tinctoria as reducing and stabilizing agent and tested against Ae. albopictus and two mosquito natural ene ...
... Zooplankton may at times graze cyanobacteria. However, their top-down effects are considered to be low, particularly in tropical regions dominated by small-size grazers that may be unable to consume efficiently filamentous or colonial species. Recently, cyanobacteria blooms were reported in the Senegal River hydrosystem. We conducted feeding experiments to assess the ability of copepods (Pseudodia ...
Culex quinquefasciatus; sodium hypochlorite; Aedes aegypti; Mesocyclops aspericornis; Mesocyclops longisetus; Anopheles farauti; insect control; chemical treatment; mortality; biological control
Abstract:
... Sodium hypochlorite (NaOCl) tolerance characteristics of Mesocyclops aspericornis (Daday), Mesocyclops longisetus (Thiebaud), Aedes aegypti (L.), Culex quinquefasciatus Say, and Anopheles farauti Laveran (sibling species no. 1) were investigated by measuring their mortality in response to total residual chlorine concentrations ranging from 0.0 to 2.0 ppm. Of the two Mesocyclops species evaluated, ...
DNA; DNA fragmentation; Mesocyclops; chromatin; genome; somatic cells; tandem repeat sequences; transposons
Abstract:
... Chromatin diminution, a developmentally regulated process of DNA elimination, is found in numerous eukaryotic species. In the copepod Mesocyclops edax, some 90% of its genomic DNA is eliminated during the differentiation of embryonic cells into somatic cells. Previous studies have shown that the eliminated DNA contains highly repetitive sequences. Here, we sequenced DNA fragments from pre- and pos ...
... Mesocyclops longisetus (Thiebaud), Mesocyclops thermocyclopoides Harada, Mesocyclops venezolanus Dussart, and Macrocyclops albidus (Jurine) were tested for their effectiveness in controlling Aedes aegypti (L.) larvae in a variety of containers around homes in El Progreso, Honduras. All four cyclopoid species killed > 20 larvae per cyclopoid per d under container conditions. M. longisetus was most ...
... Tropical reservoirs in China receive a high input of organic matter from surrounding watersheds and this represents a significant resource for zooplankton consumers. Copepods are often the dominant zooplankton group in the tropical systems. Whether copepods tend to be omnivorous and their potential cascading effect on phytoplankton are subjects of debate. We used stable carbon and nitrogen isotope ...
Brachionus; Cladocera; Mesocyclops; Ostracoda; alkalinity; calcium; cluster analysis; community structure; correspondence analysis; environmental management; food webs; freshwater; habitats; hardness; magnesium; monitoring; phosphates; turbidity; water quality; water temperature; wetlands; zooplankton; India
Abstract:
... The zooplankton assemblage of selected wetlands of Assam, India was assessed to deduce the structural variation in the context of water quality parameters. A two year study between 2012 and 2014 comprising of 530 samples from the five wetlands revealed the presence of 46 taxa, 26 Rotifera, 15 Cladocera, 4 Copepoda and 1 Ostracoda, in varying density. The rotifers dominated in terms of abundance (4 ...
... The Crimean Peninsula holds a large number of hypersaline water bodies. Our studies focused on these poorly investigated habitats, and included few brackish and freshwater ponds. Seventeen species were identified, of which only 4(5) were collected from hypersaline waters sometimes with extremely high salinities (Acanthocyclops sp. copepodid, 210 ppt; Eucyclops sp. copepodid, 150 ppt; Diacyclops bi ...
Mesocyclops; air temperature; basins; chlorophyll; eutrophication; monitoring; phosphorus; water quality; water temperature; South America
Abstract:
... Some species of copepods are sensitive to water quality oscillations from natural or anthropogenic causes. Information on basic ecological attributes such as abundance can be helpful in the context of hydric resources monitoring. Our study analyzed if the abundance of 22 copepod species of the second largest basin of South America was more associated with variables oscillating by natural or anthro ...
... INTRODUCTION: The increasing contamination of aquatic environments motivates studies on the interactions among natural dissolved organic matter, metals, and the biota. This investigation focused on the organic exudates of the toxic cyanobacteria Cylindrospermopsis raciborskii as a Cu carrier through a three-level aquatic trophic chain (bacteria, protozoa, and copepod). DISCUSSION: The effects of b ...
José Marcial Zazueta-Moreno; Edith Hilario Torres-Montoya; Hipólito Castillo-Ureta; José Israel Torres-Avendaño; Ignacio Osuna Ramírez; Vicente Olimón-Andalón; Héctor Samuel López-Moreno; Lorenzo Ulises Osuna-Martínez; José Guadalupe Rendón Maldonado
... While infection by Gnathostoma turgidum (Stossich) in the definitive host, the Virginian opossum, Didelphis virginiana (Kerr), has been described in wildlife, the complete life cycle of the parasite is unknown. Development of early third-stage larvae of Gnathostoma spp. in vitro-infected cyclopoids has been evaluated previously. However, factors involved in viability of copepods as first-intermedi ...
... Pikeperch is a major predator in the pelagic zone of eutrophic waters, such as the large north-temperate lowland lakes Võrtsjärv (Estonia) and Peipsi (Estonia/Russia). The size and structure of the pikeperch population is strongly influenced by their success at the juvenile stage. Therefore, we investigated the diet and prey selection of pikeperch fry caught in the ice-free period in lakes Peipsi ...
Ceriodaphnia; Mesocyclops; Pseudorasbora parva; fish; herbivores; invertebrates; population; population density; predation; tanks; zooplankton; Japan
Abstract:
... The impact of Pseudorasbora parva, a common zooplanktivorous fish species in Japan, on a zooplankton community was analyzed in experimental tanks, half of which were stocked with the fish. Different zooplankton species showed different responses to the introduction of the fish. In the presence of the fish, the populations of the large cladoceran Ceriodaphnia and the predatory copepod Mesocyclops w ...
Cladocera; Mesocyclops; correspondence analysis; floodplains; habitats; lakes; littoral zone; species diversity; variance; watersheds; wetlands; zooplankton; India
Abstract:
... The zooplankton diversity of a floodplain lake of the Brahmaputra river basin of lower Assam is analyzed on the bases of net plankton samples collected from the littoral (station 1) and semi-limnetic (station 2) regions during January–December 2010. The species-rich zooplankton (143 species) hypothesized environmental heterogeneity of this wetland. They showed high monthly richness (81 ± 11 and 72 ...
... Anthropogenic and natural climate-impacted water level (WL) fluctuations are one of many environmental problems affecting natural ecosystems. The aim of this study was to explain differences in the development of autotrophic and heterotrophic plankton in two shallow, temperate, embanked lakes with different modes of WL regulation. Lake Mytycze has natural WL changes supplied exclusively by precipi ...
Daphnia pulex; Hemimysis; Mesocyclops; adults; body weight; ecosystems; food webs; juveniles; lakes; Great Lakes; Ontario
Abstract:
... Hemimysis anomala is a near-shore mysid native to the Ponto-Caspian region that was discovered to have invaded Great Lakes ecosystems in 2006. We investigated feeding rates and prey preferences of adult and juvenile Hemimysis in laboratory experiments to gain insight on the potential for Hemimysis to disrupt food webs. For both age groups (AGs), we measured feeding rates as a function of prey abun ...
Ceriodaphnia; Mesocyclops; Microcystis; Moina micrura; biomass; correlation; lakes; nutrient content; plankton; tap water
Abstract:
... An enclosure experiment was conducted in July–September 2001 in subtropical eutrophic Lake Donghu (China) to test a hypothesis that a moderate cyanobacterial biomass would have a positive effect on small-sized cladocerans. Eight enclosures (12.5 m³) were arranged with different nutrient concentrations using the lake water, tap water, and sediment from Lake Donghu. Microcystis blooms appeared in en ...
... The experiments were conducted to examine the effects of five photoperiod regimes (24:00; 16:08; 12:12; 08:16 and 00:24 hours) (Light: Dark) on reproductive traits, development and generation time, survival rate, adult sex ratio and total life span of freshwater cyclopoid copepod, Mesocyclops sp.. Daily offspring production of individual female was monitored from the last moulting until death of a ...
Aedes albopictus; Mesocyclops; body size; ecosystems; females; insect larvae; males; mosquito control; predation; predators; sex ratio
Abstract:
... Cyclopoid copepods are important predators in many aquatic ecosystems and have been used as biological agents in successful programs to control mosquito larvae. However, the impacts of this predation on adult mosquito populations are still poorly understood. The present study compared the sex ratios and body sizes (measured as wing length) of Aedes albopictus mosquitoes emerging from recipients co ...
Alosa pseudoharengus; Daphnia galeata; Mesocyclops; Notropis atherinoides; chlorophyll; dissolved oxygen; eutrophication; fish; gillnets; grazing; herbivores; hypoxia; invertebrates; oxygen; phosphorus; planktivores; predation; sediments; summer; surveys; water quality; zooplankton; Lake Ontario; New York
Abstract:
... Hypolimnetic oxygen injection is a management tool used to improve water quality by preventing anoxia and associated phosphorus release from the sediments. An additional benefit would be formation of a low‐oxygen refuge for large‐bodied herbivorous zooplankton in the metalimnion. The magnitude and timing of hypolimnetic oxygenation was deliberately manipulated during summer 1997 in Irondequoit Bay ...
José Israel Torres-Avendaño; Edith Hilario Torres-Montoya; José Guadalupe Rendón-Maldonado; Reyna Luisa López-Mendoza; Ignacio Osuna-Ramírez; Cesar Enrique Romero-Higareda; Hipólito Castillo-Ureta
Aedes aegypti; Mesocyclops; biological control agents; dengue; females; larvae; predation; statistical models; vector control
Abstract:
... The copepod Mesocyclops edax was evaluated under laboratory conditions as a biological control agent for Aedes aegypti larvae. L1 larvae of Ae. aegypti at different densities were exposed for 24 hours to a M. edax female without food for 24 hours, observing more predation by M. edax as the density of Ae. aegypti larvae increased, reaching 49 larvae consumed in 1 day. Using the Spearman statistical ...
... Six of seven species of Mesocyclops copepods, collected from northeastern Australia, showed potential as biological control agents of Aedes mosquitoes. Methods of laboratory evaluation included predation trials at different larval mosquito densities, population growth rates at different temperatures, and laboratory cage simulations. The predation efficacy of Mesocyclops aspericomis, M. australiens ...
... With their ultraoligotrophic status, the Chilean North Patagonian lakes have mixotrophic ciliates in their pelagic environments as producers, whereas the primary consumers are crustaceans that are low in abundance and species numbers. The aim of the present study was to determine the potential grazer role of mixotrophic ciliates on crustacean zooplankton collected in a lake without mixotrophic cil ...
Mesocyclops; Aedes aegypti; predators; mortality; population growth; population density; biological control; vector control; citizen participation; breeding sites; Mexico
Abstract:
... Field trials of the predacious copepod Mesocyclops longisetus Thiubaud were conducted in northeastern Mexico to determine the effectiveness of this species to control larval Aedes aegypti (L.) populations and to survive and reproduce in nature. Groups of 200, 50, and 50 ovigerous M. longisetus females were inoculated into 200-liter metal drums, discarded tires, and cemetery flower vases, respectiv ...
... In this study we present a first limnological characterization of Lake Billy Mitchell [1,013 m above sea level (a.s.l.), 88.3 m depth, 3 km² surface area] in central Bougainville Island, Papua New Guinea. Physicochemical depth profiles indicated mixis of the entire water body with oxygen saturation reaching 55% in the deepest layers. A shallow thermocline was eroded at night, indicating atelomixis ...
... The crustacean zooplankton in Chilean Patagonian lakes is characterized by a marked dominance of calanoid copepods when under an oligotrophic status. The aim of the present study was to analyse the number of eggs and the relation of that feature with the total length of females of calanoid and cyclopoid copepods reported in three northern Chilean Patagonian lakes. The calanoid copepods found were ...
... We generated a mass-balance model to figure out the food web structure and trophic interactions of the major functional groups of the Ethiopian highland Lake Hayq. Moreover, the study lay down a baseline data for future ecosystem-based investigations and management activities. Extensive data collection has been taken place between October 2007 and May 2009. Ecotrophic efficiency (EE) of several fu ...
... The feeding rates and functional responses of the copepod Mesocyclops pehpeiensis (adult females) were quantified using rotifers (Brachionus rubens, Brachionus havanaensis and Plationus patulus), cladocerans (Moina macrocopa, Ceriodaphnia dubia and Alona glabra), the green alga Chlorella vulgaris and the cyanobacterium Anabaena sp. as food. Mesocyclops pehpeiensis showed preferences for B. havanae ...
... The present study was carried out to evaluate the larvicidal potential of methanol, hexane, acetone, chloroform, and aqueous bark extracts of Holarrhena antidysenterica (L.) Wall. and silver nanoparticles (AgNPs) synthesized using aqueous bark extract against the third instar larvae of Aedes aegypti L. and Culex quinquefasciatus Say. AgNPs were prepared by adding 10 ml of aqueous bark extract in 9 ...
... KEY MESSAGE: Atropa acuminata aqueous leaf extract biosynthesized silver nanoparticles showed strong antioxidant, anticancerous (HeLa cells) and anti-inflammatory activities. Besides, this bio syn-AgNP also proved effective against mosquito vectors causing malaria, dengue and filariasis. Present study highlights eco-friendly and sustainable approach for the synthesis of silver nanoparticles (AgNP) ...
Sarahi Jaime; Adrián Cervantes-Martínez; Martha A. Gutiérrez-Aguirre; Eduardo Suárez-Morales; Julio R. Juárez-Pernillo; Elena M. Reyes-Solares; Victor H. Delgado-Blas
Ceriodaphnia; Mesocyclops; Neotropics; Rotifera; eutrophication; freshwater; lakes; playas; species richness; water quality; zooplankton; Guatemala
Abstract:
... This paper presents a study of freshwater zooplankton biodiversity, deemed as a reliable indicator of water quality. The Guatemalan Lake Amatitlán, currently used as a water source, has shown signs of progressive eutrophication, with perceptible variations of the local zooplankton diversity. Biotic and abiotic parameters were determined at four sites of Lake Amatitlán (Este Centro, Oeste Centro, B ...
Mesocyclops; Wolbachia; ambient temperature; arthropods; bacteria; fecundity; feminization; mixed infection; nauplii; phenotype; quantitative polymerase chain reaction; rearing; sex ratio
Abstract:
... Wolbachia are a group of intracellular bacteria that cause reproductive alterations in arthropods. Here, we describe the effects of two environmental factors (crowding and temperature) on phenotypic expression of feminization, the host’s fecundity and Wolbachia infection intensity among life cycle stages in the naturally Wolbachia-infected copepod, Mesocyclops thermocyclopoides. The copepod was fi ...
... In vitro elicitation of an important compound conessine has been done in the bark-derived callus culture of Holarrhena antidysenterica (L.) Wall. employing different elicitors. For induction of callus, green bark explants excised from field-grown plants were cultured on MS medium augmented with different concentrations (0, 1, 2.5, 5, and 10 μM) of various growth regulators such as BA, IBA, NAA, an ...
Neila Annabi-Trabelsi; Gamal El-Shabrawy; Mohamed E. Goher; Madhavapeddi N. V. Subrahmanyam; Yousef Al-Enezi; Mohammad Ali; Habib Ayadi; Genuario Belmonte
Acartia tonsa; Mesocyclops; environmental factors; environmental indicators; eutrophication; lakes; nutrients; river deltas; salinity; species diversity
Abstract:
... The copepod assemblages and abiotic parameters were investigated at 11 stations in a large coastal lake (Lake Manzalah, Nile Delta) from 2009–2010 in order to verify any impacts of eutrophication and salinity on the copepod species composition. The environmental conditions and the copepod assemblages appeared to have changed in comparison with previous studies, possibly because of increasing ...
Aedes aegypti; biological control; laboratory techniques; Mesocyclops; mortality; Brazil
Abstract:
... In laboratory tests, four different strains of Mesocyclops aspericornis (Daday) collected in or near Fortaleza, Brazil, showed potential as biological control agents of Aedes aegypti (L.) mosquito larvae but were not as effective against Anopheles or Culex. In contrast, the larger M. longisetus (Thiebaud), collected at Fortaleza, killed 100% of Ae. aegypti and Anopheles farauti (Laveran) (No. 1) a ...
... The effects of triphenyltin (TPT) on non-target aquatic groups like copepods have not yet been studied in detail. Recently, Mesocyclops leuckarti was suggested as a representative species for freshwater cyclopoid copepods to study the effects of plant protection products. We conducted 96h acute toxicity tests in the laboratory to study the effects of TPT on the different life stages of M. leuckart ...
... We present a first limnological study of three humic crater lakes in the archipelago of Samoa. The basins of Lakes Lanoto‘o (17.5 m deep) and Olomaga (12.2 m) on Upolu Island and of Lake Mataulano (5.6 m) on Savai‘i Island developed during consecutive periods of volcanic activity ranging from the middle Pleistocene to the late Holocene. Lake Olomaga may be a permanently stratified meromictic lake, ...
Brachionus calyciflorus; Ceriodaphnia cornuta; Diaphanosoma; Mesocyclops; fauna; littoral zone; monsoon season; pH; principal component analysis; summer; temperature; water quality; zooplankton; India
Abstract:
... The present study investigated zooplankton composition and diversity, along with physicochemical parameters from the littoral regions of Himayat Sagar Reservoir, Telangana, India. A total of 84 zooplankton species were found, including 60 rotifer species, 16 cladoceran species and eight copepod species. Keratella tropica, Lecane bulla, Coronatella rectangula and Mesocyclops sp. were observed frequ ...
... We investigated the roles of local environmental conditions and dispersal limitation in zooplankton recovery from acidification in Swan Lake, Ontario, a historically acidified, metal‐contaminated lake. We hypothesized that local environmental conditions (pH and the presence of resident, acid‐tolerant zooplankton) would limit the establishment of several zooplankton colonist species. We tested this ...
Daphnia; Diaptomus; Gambusia affinis; Mesocyclops; Rotifera; adults; long term experiments; nauplii; phytoplankton; predation; species diversity; tanks; zooplankton
Abstract:
... Zooplankton species composition was manipulated in an 8—mo long series of experiments in outdoor 450—L tanks. The first experimental stage evaluated the impact of cyclopoids (Mesocyclops, Microcyclops, Cyclops) and calanoids (Diaptomus) on each other. The second and third stages evaluated the effects of Daphnia and mosquitofish (Gambusia affinis) on the calanoid—cyclopoid interaction. Cyclopoid pr ...
Mesocyclops; Aedes aegypti; larvae; predation; mortality; biological control agents; biological control; tires; predators; life tables; breeding sites; Mexico
Abstract:
... The effect of the introduction of the entomophagous copepod Mesocyclops longisetus (Acuacultura F.C.B. strain) on the survival of Aedes aegypti immature stages in car tyres was evaluated under semi‐natural conditions in the municipality of Merida, Yucatan, Mexico. Life tables were constructed for the immature stages of the mosquito in the presence and absence of M. longisetus, and the survival dat ...
Malacostraca; Mesocyclops; basins; coasts; estuaries; freshwater; freshwater lakes; salinity; zooplankton; South Africa
Abstract:
... The Kosi coastal lake system, a chain of four interconnected basins, is located in the subtropical north-eastern corner of South Africa. Little information is available on zooplankton of the system and the main aim of this study is to report on zooplankton samples collected during 2002 and 2003. The set of samples consists of seasonal, subsurface mesozooplankton samples that were collected during ...
Ceriodaphnia; Mesocyclops; Microcystis; analysis of variance; lakes; microcystins; zooplankton; China
Abstract:
... Microcystins (MCs) have a toxic effect on crustacean zooplankton in the laboratory, but there is little or no unequivocal evidence in the literature of their lethal effects on crustacean zooplankton in the field. We used the natural microcystins extracted from Microcystis spp. to test if they could cause any negative effects on crustacean zooplankton. We conducted three experiments in enclosures w ...
... The present study was carried out on Solanum xanthocarpum fruit extract and copepods Mesocyclops thermocyclopoides, which were assessed for the control of dengue vector, Aedes aegypti, under laboratory conditions. The medicinal plants were collected from the outskirts of Bharathiar University, Coimbatore, Tamil Nadu, India. The shade-dried fruit materials were extracted by employing the Soxhlet ap ...
... Littoral invertebrates of Cochran Lake, Michigan were either highly ₚlant—associated, and found infrequently away from aquatic macrophytes, or free—swimming among the plants. Plant—associated taxa were distributed according to available surface area. Numbers of periphyton and detritus feeders, chiefly chydorid Cladocera and chironomid midge larvae, were highly correlated with diatom density, where ...
Mesocyclops; branching; caves; new species; phylogeny; tropics; Africa; India; South America; Vietnam
Abstract:
... A new stygobitic cyclopoid species, Mesocyclops sondoongensis sp. nov. is described from caves in central Vietnam. This is the first cave-dwelling representative of Mesocyclops in SE Asia. Conspicuous features of the new species, such as the narrow lateral arms of the seminal receptacle and the presence of medial spine on leg 1 basipodite, are only shared with the rarus-group in the Paleotropics, ...
phytoplankton; nutrient content; rivers; lakes; Mesocyclops; Chlorophyta; environmental factors; Rotifera; species diversity; eutrophication; Cyanobacteria; zooplankton; Brazil
Abstract:
... Species richness of plankton was studied in a eutrophic reservoir (Barra Bonita Reservoir) of the Middle Tietê River, São Paulo State, Brazil, during the period 1985–1986. This reservoir is formed by two rivers: the Tietê and the Piracicaba (the main tributaries), of which the Tiête is more eutrophic, having conductivity and nutrient concentration values twice those of the Piracicaba. In addition, ...
... Five copepod species, Acantocyclops robustus, Macrocyclops albidus, Mesocyclops annulatus, Thermocyclops sp. (all Cyclopoidea) and Argyrodiaptomus bergi (Calanoidea), were evaluated under laboratory conditions as potential predators of preparasites of the mermithid nematode Strelkovimermis spiculatus. Adults of all five copepod species consumed 70-100% of the preparasites within 24 h. Copepodids a ...
Cladocera; Mesocyclops; body size; juveniles; limnology; ontogeny; predation; prey species; probability
Abstract:
... We compared the vulnerability of small cladoceran species (Bosminopsis deitersi, Bosmina longirostris, and Scapholeberis mucronata) to predation by Mesocyclops sp. in the laboratory based on prey handling time and ingestion probability. We also estimated the effects of ontogenetic changes on handling time by testing prey of various body sizes. All tested prey species showed an increasing pattern o ...
Aedes; Mesocyclops; biological control agents; water; tanks
Abstract:
... The population growth and survival of Mesocyclops aspericornis (Daday) and Mesocyclops darwini (Dussart & Fernando) were compared in rainwater tanks at Amity Point, Stradbroke Island, and natural breeding habitats in other Queensland localities. The biological and physicochemical attributes of these biotopes were measured and it was found that pH, protozoan numbers, and chlorophyll level all signi ...
Mesocyclops; coasts; fauna; habitats; new species; new subgenus; South Africa; South America
Abstract:
... The genus Mesocyclops Sars 1914, which has hitherto contained too many nominal species, is divided into four subgenera based on the morphological and habitat characteristics. The subgenus Neomesocyclops subgen. n. comprises species almost exclusively living in the New World. The single exception is M. (N.) tenuisaccus (Sars 1927), described from South Africa, which may prove to be a junior synonym ...
plateaus; phytoplankton; nitrogen content; winter; autumn; analysis of variance; Mesocyclops; community structure; lakes; spring; environmental factors; water temperature; Daphnia galeata; Ceriodaphnia; summer; biomass; zooplankton; phosphorus
Abstract:
... The seasonal dynamics of a crustacean zooplankton community in Erhai Lake was investigated from May 2010 to April 2011. In total, 11 species were recorded, including six (6 genera) cladoceran and five (5 genera) copepod species. The crustacean zooplankton densities ranged from 24.3 to 155.4 ind./L. In winter and spring, the large-bodied cladoceran Daphnia galeata dominated the crustacean plankton ...
nutrient content; cations; watersheds; seasonal variation; Microcystis aeruginosa; groundwater; biochemical oxygen demand; zooplankton; interspecific variation; lakes; Mesocyclops; multivariate analysis; surface water; water quality; community structure; species diversity; chemical oxygen demand; Brachionus; silicates; physicochemical properties; environmental factors; rain; nitrates; India
Abstract:
... Old Fort Lake, a small (1.6 ha), shallow, and recreational water body in Delhi (India) was studied through monthly surveys in two consecutive years (January, 2000-December, 2001). Precipitation is the major source of water for this closed basin lake. In addition, ground water is used for replenishing the lake regularly. This alkaline, hyposaline hard water lake contains very high ionic concentrati ...
Aedes; Mesocyclops; biological control; biological control agents; dengue; education; entomology; focus groups; households; insect surveys; interviews; larvae; monitoring; social sustainability; teachers; water storage; Vietnam
Abstract:
... Copepod Mesocyclops as biological control agents for dengue was previously proven to be effective and sustainable in the Northern and Central provinces of Vietnam. We aim to study social sustainability of Mesocyclops intervention in south Vietnam. Both quantitative and qualitative approaches were used. An entomological survey was carried out in 100 random households of Chanh An commune, Vinh Long ...
... In this study, the spatial distribution of brood-bearing females of five species of limnetic cladocerans (Daphnia cucullata, D. longispina, Bosmina coregoni, B. longirostris, Diaphanosoma brachyurum) in the deep mesotrophic lake in relation to the predation pressure of planktivorous fish (roach Rutilus rutilus, perch Perca fluviatilis, catfish Ictalurus nebulosus, white fish Coregonus albula, blea ...
... This study assessed zooplankton density and Chl-a amount to understand their spatial and seasonal variation in Lake Malombe. Samples were collected for analysis during the hot, dry season (HDS) and cool, dry, windy season (CDWS). The zooplankton identified were Tropodiaptomus cunningtoni (TC), Mesocyclops aequatorialis aequatorialis (MAA), Thermocyclops neglectus (TN), Bosmina longirostris (BL), D ...
Chaoborus; Mesocyclops; Moina micrura; Rotifera; air temperature; biomass; climate; community structure; energy transfer; fish; herbivores; lakes; larvae; mixing; phytoplankton; planktivores; predation; rare species; temporal variation; variance; wind; zooplankton; Ghana
Abstract:
... The community composition and the factors affecting seasonal and interannual dynamics of zooplankton in Lake Bosumtwi were studied biweekly at a central index station during 2005 and 2006. The lake zooplankton community was species poor. Mesocyclops bosumtwii was numerically superior seasonally and interannually and was endemic to the lake. Minor constituents included Moina micrura , six rotifer s ...
... Stable isotope ratios of three seston size classes (20–100μm, 2–20μm, and 0.2–2μm) and zooplankton species were analyzed to determine the plankton food web structure of Lake Malawi. Over an annual cycle, seston δ¹³C varied between −20.41‰ and −27.43‰ with a mean value of −24.27‰±1.2 while δ¹³C values for zooplankton fluctuated between −22‰ and −25‰ with a mean of −23.84‰±0.77. Seston δ¹³C fluctuat ...
... Many crustaceans have complex life cycles characterized by a metamorphosis, yet variation in metamorphic traits, and the causes and consequences of this variation, have rarely been examined. Food concentrations were changed during specific larval stages of the freshwater copepod Mesocyclops edax Forbes (Copepoda: Cyclopoida) to examine whether age and size at metamorphosis remain flexible or becom ...
Mesocyclops; center of diversity; internal transcribed spacers; monophyly; new species; sympatry; zoology; Sub-Saharan Africa; Thailand
Abstract:
... With nearly 80 valid species, the genus Thermocyclops Kiefer, 1927 is one of the most speciose members of the family Cyclopidae. Although its centre of diversity is in the Sub-Saharan Africa, different species can be found in almost any non-glaciated part of the world. Six of them have been recorded so far from Thailand, all from lacustrine environments and with very wide distribution. It was ther ...
... In terms of morphology, crustacean maxillipeds are hybrid appendages. They arise in anterior thoracic segments and display characteristics of both locomotory (thoracic) and feeding (gnathal) appendages. Maxillipeds are functionally integrated with the anterior gnathal appendages. Hox gene expression patterns and immunolabeling with the FP6.87 antibody, which detects conserved epitopes of UBX and A ...
Amphora; Brachionus plicatilis; Ceriodaphnia; Eunotia; Gomphonema; Mesocyclops; Nitzschia; Pinnularia; epiphytes; freshwater; mining; zooplankton; South Africa
Abstract:
... This paper provides a description of the zooplankton and epiphytic diatom communities of permanent and temporary freshwater pans in the Mpumalanga Highveld region of South Africa. Few studies have investigated the biota of pans in this area, which is seriously threatened by mining and agricultural development. Nineteen pan sites within a 20 km radius covering a wide range of water chemistries were ...
Amphora; Brachionus plicatilis; Ceriodaphnia; Eunotia; Gomphonema; Mesocyclops; Nitzschia; Pinnularia; Planothidium; agricultural development; epiphytes; freshwater; mining; saline water; zooplankton; South Africa
Abstract:
... This paper provides a description of the zooplankton and epiphytic diatom communities of permanent and temporary freshwater pans in the Mpumalanga Highveld region of South Africa. Few studies have investigated the biota of pans in this area, which is seriously threatened by mining and agricultural development. Nineteen pan sites within a 20 kmradius covering a wide range of water chemistries were ...
... This study focuses on changes in zooplankton composition and abundance in Lake Nasser during different flood periods before the construction of the Grand Ethiopian Renaissance Dam (GERD). Field surveys were carried out in August 2016 (flood period), December 2016 (post-flood period), and May 2017 (pre-flood period). Fifteen sampling sites representing five sectors were selected to cover the lake w ...
Ciliata; Cladocera; Mesocyclops; Nematoda; Rotifera; carbon dioxide; correspondence analysis; phosphates; rain; species diversity; variance; water temperature; zooplankton; India
Abstract:
... This study on zooplankton diversity from the state of Mizoram of northeast India, based on plankton samples collected from Khawiva reservoir during November 2005-October 2007, recorded a total of 46 species. Zooplankton indicated monthly richness ranging between 19-36 and 25-34 species; registered 52.8-88.9 and 60.0-89.3% community similarities (vide Sørensen’s index); and comprised between 31.2±1 ...
Brachionus angularis; Mesocyclops; autumn; food chain; income; irrigation water; physicochemical properties; species abundance; species richness; spring; summer; time series analysis; water quality; winter; zooplankton; Ethiopia
Abstract:
... Understanding the composition, diversity, and abundance of the zooplankton community is crucial for better utilization of the Ribb Reservoir, as zooplankton are the second link in the food chain in aquatic systems (they are also excellent bioindicators of aquatic health, given their central food web position) and the reservoir also serves as a source of income for the fishers. Therefore, sampling ...