نتایج جستجو برای: copepods
تعداد نتایج: 2457 فیلتر نتایج به سال:
Dengue fever is a mosquito-borne viral disease, whose main biological vector is Aedes aegypti. This mosquito colonizes tropical areas where the disease is endemic. The most obvious action against dengue is attacking its vector. Biological control appears to be an alternative approach, using natural enemies of the mosquitoes, such as predatory copepods. Thus, the morphological study of the damag...
Seasonal fluctuations in zooplankton abundance between July 1973 and July 1974 showed a clear peak in total copepods and rotifers in February-March, and a less pronounced peak in July-August. Standing crop and production estimates for the two dominant copepods, Acarfia fonsa and Eurytemoru uffinis, revealed that the February-March peak was primarily E. affinis and sustained far higher biomass (...
This thesis will examine the mechanosensory capabilities ofjuvenile copepods from an essential prey species in the North Atlantic food web, Calanusjinmarchicus. An important underlying component of these interactions is myelination ofaxons associated with decreased response latencies, yet myelination has not been observed in electron micrographs of copepod nauplii. Electrophysiological recordin...
Oithona spp. are probably the most abundant and ubiquitous copepods in the world’s oceans. However, knowledge of their development and growth rates is scarce compared to that of calanoid copepods. In the present laboratory study, we determined the survival, development and growth rates of the naupliar stages of Oithona davisae under different temperature regimes and food concentrations. Nauplia...
Examination of harpacticoid copepod morphology was conducted to determine whether morphological resemblance provides a reasonable index of habltat utilization and movement. Discriminant analysis was used to explore the relationship between body form and habitat utilization for copepod species collected from 3 subhabitats within seagrass beds in Tarnpa Bay, Florida. To examine the accuracy of ou...
Citation: Moriceau B, Iversen MH, Gallinari M, Evertsen A-JO, Le Goff M, Beker B, Boutorh J, Corvaisier R, Coffineau N, Donval A, Giering SLC, Koski M, Lambert C, Lampitt RS, Le Mercier A, Masson A, Stibor H, Stockenreiter M and De La Rocha CL (2018) Copepods Boost the Production but Reduce the Carbon Export Efficiency by Diatoms. Front. Mar. Sci. 5:82. doi: 10.3389/fmars.2018.00082 Copepods Bo...
Microzooplankton have received increased attention as an important trophic link between the microbial loop and calanoid copepods. On the basis of food size spectra overlap in some microzooplankton groups and calanoid copepods, however, such microzooplankton could function as competitors rather than as food for calanoid copepods (intraguild prey). Mixotrophic flagellates presumably represent a l...
The current commercial production protocols for Atlantic cod depend on enriched rotifers and Artemia during first-feeding, but development and growth remain inferior to fish fed natural zooplankton. Two experiments were conducted in order to identify the underlying factors for this phenomenon. In the first experiment (Exp-1), groups of cod larvae were fed either (a) natural zooplankton, mainly ...
Intraspecific variation in body pigmentation is an ecologically and evolutionary important trait; however, the pigmentation related trade-offs in marine zooplankton are poorly understood. We tested the effects of intrapopulation phenotypic variation in the pigmentation of the copepod Eurytemora affinis on predation risk, foraging, growth, metabolic activity and antioxidant capacity. Using pigme...
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