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Conducta alimentaria de Daphnia ambigua Scourfield 1947, Moina micrura Kurz 1874 y Ceriodaphnia dubia Richard 1895 (Cladocera) frente a un gradiente de concentración de alimento
MARTINEZ,GINGER;
Revista chilena de historia natural , 2000, DOI: 10.4067/S0716-078X2000000100006
Abstract: because cladocera is the most abundant group of filter-feeders in the freshwater zooplankton and their populations are usually found under limited resources conditions, the individual response under a resources concentration gradient has important consequences on the population and community patterns. feeding behavior of moina micrura, ceriodaphnia dubia and daphnia ambigua (cladocera) on the microalgae chlorella sp. and oocystis sp. (chlorophyceae) was compared by using the following parameters: maximum ingestion rate (imax), incipient limiting concentration (ilc) and consumption efficiency (b), which were obtained through a model of functional response. results indicated that d. ambigua showed the highest imax and ilc on both resources, however, this specie presented the lowest b. whereas, d. ambigua did not show differences in b on chlorella sp. or oocystis sp., m. micrura showed a higher b on chlorella sp. and c. dubia on oocystis sp. these results reveal significant interspecific differences in the feeding response of cladocera, which showed a complex behavior exposed to variations in the availability of food resources
Conducta alimentaria de Daphnia ambigua Scourfield 1947, Moina micrura Kurz 1874 y Ceriodaphnia dubia Richard 1895 (Cladocera) frente a un gradiente de concentración de alimento Feeding behaviour of Daphnia ambigua Scourfield 1947, Moina micrura Kurz 1874 and Ceriodaphnia dubia Richard 1895 (Cladocera) under a food concentration gradient  [cached]
GINGER MARTINEZ
Revista chilena de historia natural , 2000,
Abstract: Debido a que Cladocera es el grupo de microfiltradores más abundante del zooplancton límnico y cuyas poblaciones se encuentran usualmente limitadas por alimento, la respuesta de los individuos frente a un gradiente de concentración de recursos tendría significativas implicancias sobre los patrones poblacionales y comunitarios. Se comparó la conducta alimentaria de Moina micrura, Ceriodaphnia dubia y Daphnia ambigua (Cladocera) frente a las microalgas Chlorella sp. y Oocystis sp. (Chlorophyceae) mediante los siguientes parámetros: Tasa de Ingesta Máxima (Imax), Concentración Limitante Incipiente (CLI) y Eficiencia de Consumo (b), los cuales fueron obtenidos a través de un modelo de respuesta funcional. Los resultados mostraron que D. ambigua presentó las mayores Imax y CLI sobre ambos recursos, sin embargo, esta especie presentó la menor b. Mientras que D. ambigua no presentó diferencias en b sobre Chlorella sp. y Oocystis sp., M. micrura presentó una mayor b sobre Chlorella sp. y C. dubia sobre Oocystis sp. Estos resultados revelan significativas diferencias interespecíficas en la respuesta alimentaria de Cladocera, grupo que presentó un complejo comportamiento frente a variaciones en la disponibilidad de recursos alimentarios Because Cladocera is the most abundant group of filter-feeders in the freshwater zooplankton and their populations are usually found under limited resources conditions, the individual response under a resources concentration gradient has important consequences on the population and community patterns. Feeding behavior of Moina micrura, Ceriodaphnia dubia and Daphnia ambigua (Cladocera) on the microalgae Chlorella sp. and Oocystis sp. (Chlorophyceae) was compared by using the following parameters: Maximum Ingestion Rate (Imax), Incipient Limiting Concentration (ILC) and Consumption Efficiency (b), which were obtained through a model of functional response. Results indicated that D. ambigua showed the highest Imax and ILC on both resources, however, this specie presented the lowest b. Whereas, D. ambigua did not show differences in b on Chlorella sp. or Oocystis sp., M. micrura showed a higher b on Chlorella sp. and C. dubia on Oocystis sp. These results reveal significant interspecific differences in the feeding response of Cladocera, which showed a complex behavior exposed to variations in the availability of food resources
Population growth and development of two species of Cladocera, Moina micrura and Diaphanosoma birgei, in laboratory
SIPAúBA-TAVARES, L. H.;BACHION, M. A.;
Brazilian Journal of Biology , 2002, DOI: 10.1590/S1519-69842002000400018
Abstract: the objective of the present work was to investigate the influence of four diets on population growth, development, total length, dry weight, and nutritional value of two zooplanktonic species, moina micrura and diaphanosoma birgei. the four dietary treatments were: algae alone (a); algae + vitamins (av); algae + ration (ar); and algae + ration + vitamins (arv). growth rate peak for both species occurred faster with av treatment. in general, av treatment for m. micrura showed better results for intrinsic rate, fecundity, and embryonic and post-embryonic development. on the other hand, longevity and total spawning number were better with ar treatment (p < 0.05). vitamin and ration treatments produced the best results in d. birgei species (p < 0.05). the highest percentage of protein and lipids for both cladocerans was verified for ration treatments. carbohydrate was higher for the treatment containing algae alone (p < 0.05). generally, diets containing ration and vitamin showed better results in cladocerans development, with water quality adequate for culture systems. ration and vitamin diets may also be used in high-density cultures in the laboratory.
Population growth and development of two species of Cladocera, Moina micrura and Diaphanosoma birgei, in laboratory  [cached]
SIPAúBA-TAVARES L. H.,BACHION M. A.
Brazilian Journal of Biology , 2002,
Abstract: The objective of the present work was to investigate the influence of four diets on population growth, development, total length, dry weight, and nutritional value of two zooplanktonic species, Moina micrura and Diaphanosoma birgei. The four dietary treatments were: algae alone (A); algae + vitamins (AV); algae + ration (AR); and algae + ration + vitamins (ARV). Growth rate peak for both species occurred faster with AV treatment. In general, AV treatment for M. micrura showed better results for intrinsic rate, fecundity, and embryonic and post-embryonic development. On the other hand, longevity and total spawning number were better with AR treatment (p < 0.05). Vitamin and ration treatments produced the best results in D. birgei species (p < 0.05). The highest percentage of protein and lipids for both cladocerans was verified for ration treatments. Carbohydrate was higher for the treatment containing algae alone (p < 0.05). Generally, diets containing ration and vitamin showed better results in cladocerans development, with water quality adequate for culture systems. Ration and vitamin diets may also be used in high-density cultures in the laboratory.
Distribution and abundance of Cladocera (Branchiopoda) in the Paraíba do Sul River estuary, Rio de Janeiro, Brazil
Sterza, José Mauro;Fernandes, Luiz Loureiro;
Brazilian Journal of Oceanography , 2006, DOI: 10.1590/S1679-87592006000300003
Abstract: to characterize the cladoceran community of the paraíba do sul river estuary, located in the district of s?o jo?o da barra, rio de janeiro, brazil, cladocerans were collected monthly in nine sampling stations from september 2002 until august 2003. samples were obtained by subsurface tows using a plankton net with a 30 cm opening mouth and 70 micron mesh size, fitted with a mechanical flowmeter. environmental parameters such as salinity and temperature were also obtained. seventeen species of cladocera were identified: pseudoevadne tergestina, penilia avirostris, macrothrix triserialis, moina micrura, simocephalus kerhervei, simocephalus vetalus, simocephalus latirostris, simocephalus serrulatus, alona rectangula, alona quadrangularis, bosmina longirostris, bosminopsis deitersi, camptocercus dadayi, ceriodaphnia richardi, diaphanosoma fluviatile, kurzia latissima and pleuroxus similis. the highest total abundance of cladocera occurred in april in the marine zone of the estuary. the most abundant species during this period was penilia avirostris. at the mixing and freshwater zones of the estuary, the most abundant species were moina micrura, mainly in january; and simocephalus vetalus and bosmina longirostris during spring. from this scenario, it can be inferred that the cladoceran community of the paraíba do sul river estuary presents characteristics of marine, brackish and freshwater environments. temperature and salinity seem to limit the occurrence and distribution of cladocerans in the estuary.
The effect of light on ingestion capacity of Moina mongolica Daday (Cladocera: Moinidae)
光照对蒙古裸腹溞摄食强度的影响

ZHAO Wen,
赵文

生态学报 , 2005,
Abstract: Moina mongolica Daday, which appears to be the only halophilic species of Moina in the old world, distributes from north Africa, across the Middle East and the Central Russia, Aral Sea, Spain. It is a new record of Cladocera in China. Dalian Fisheries University has initiated a saline water research program including its autecology, reproductive biology, feeding ecology and perspective as live food for marine fish larviculture. However, the effect of light on the ingestion capacity is not reported. A di...
Adaptability of Moina affinis (Crustacea: Cladocera: Moinidae) to seawater salinity
近亲裸腹溞对海水盐度的适应性

ZHAO Wen,YU Boshi,WANG Ting,SONG Liang,
赵文
,余博识,王婷,宋亮

应用生态学报 , 2006,
Abstract: By the methods of experimental ecology, this paper studied the effects of different salinity (0, 1, 2, 3, 4, 5) on the survival, growth, and reproduction of Moina affinis (Crustacea: Cladocera: Moinidae) at 25 degrees C +/- 0.5 degrees C under laboratory conditions, aimed to know the adaptability of freshwater cladocerans to seawater salinity. The results indicated that when the salinity increased from 0 to 5, the mean lifespan of M. affinis was 16.8 +/- 1.3, 17.8 +/- 3.5, 14.2 +/- 5.7, 13.0 +/- 1.6, 9.6 +/- 1.5 and 6.6 +/- 1.8 days, intrinsic increase rate (rm) was 0.91 +/- 0.01, 0.96 +/- 0.01, 0.86 +/- 0.10, 0.86 +/- 0.05, 0.49 +/- 0.18 and 0.24 +/- 0.06 d (-1) mean eggs production per clutch was 34.5 +/- 3.7, 34.2 +/- 3.9, 27.5 +/- 7.1, 34.6 +/- 3.9, 12.3 +/- 5.0 and 9.1 +/- 2.1 ind., and life fecundity was 410 +/- 32, 445 +/- 84, 250 +/- 106, 294 +/- 47, 59 +/- 38 and 24 +/- 6 ind., respectively. There was a significant difference in mean lifespan, intrinsic increase rate, and mean eggs production per clutch between treatments salinity 0, 1, 2 and 3 and treatments salinity 4 and 5, and in life fecundity between treatments salinity 0 and 1 and treatments salinity 2, 3, 4 and 5. The body length and daily growth rate was lower in control than in other treatments. It was suggested that salinity 5 was the maximum threshold salinity for the survival and reproduction of M. affinis, but after a short period of acclimatization in diluted seawater, the maximum threshold could reach 6. 5.
Macrothrix flabelligera, a newly-recorded Cladocera Macrothricidae in Brazilian freshwaters
Güntzel, A. M.;Matsumura-Tundisi, T.;Rocha, O.;
Brazilian Journal of Biology , 2004, DOI: 10.1590/S1519-69842004000200006
Abstract: a short characterization of macrothrix flabelligera smirnov, 1992 (cladocera, macrothricidae) is presented, following a recent record of this species in brazil. general aspects and morphological details of the body of parthenogenetic and ephippial females, as well as of males, are described and illustrated.
The compensatory growth following starvation and optimum food density in two strains of Moina mongolica Daday (Cladocera: Moinidae)
两品系蒙古裸腹溞种群补偿生长及适宜食物密度

ZHAO Wen,
赵文

生态学报 , 2005,
Abstract: Two experiments were conducted in order to determine the optimum food density of Moina mongolica and to clarify M. mongolica have or not the phenomenon of compensatory growth. The test animals were two strains of Moina mongolica(Jinnan strain and Neimeng strain) in this study. Jinan strain of M. mongolica was collected from Lake Xiaochi in south of Shanxi Province in 1982; Neimeng strain of M. mongolica was collected from Lake Zhagesitai in Inner Mongolia in 2002. Laboratory-reared M. mongolica juveniles( a...
Ephippial and subitaneous egg abortion: relevance for an obligate parthenogenetic Daphnia population  [cached]
José M. CONDE-PORCUNA,Francisco Javier VALDéS,Susana ROMO,Carmen PéREZ-MARTíNEZ
Journal of Limnology , 2011, DOI: 10.4081/jlimnol.2011.69
Abstract: We experimentally analysed the importance of egg abortion in the reproduction strategies of Daphnia pulicaria (Forbes) in Lake Río Seco, a high mountain lake. Adult animals were exposed to different treatments under continuous or dynamic conditions (temperature and photoperiod) to test whether the simulation of field conditions, with changing temperature and photoperiod, induces differences in their reproductive traits in comparison to continuous conditions, with the aim of extrapolating results to the lake. Continuous conditions were the photoperiod and temperature values recorded in the lake at the time when ephippial reproduction is induced. Dynamic conditions were the changing values in the field from the continuous conditions until autumn. The number of healthy ephippial eggs per ephippium was also recorded by using sediment traps in the lake. Our results show that subitaneous and ephippial egg abortion has a major influence on an obligate parthenogenetic Daphnia population in both the laboratory and field. The total number of healthy ephippial eggs per ephippium (mean ± SE; 0.52 ± 0.12) and the proportion of released empty ephippia obtained in the sediment traps (0.73 ± 0.05) were similar to those experimentally obtained under dynamic conditions (healthy eggs per ephippium: 0.29 ± 0.16; proportion of released empty ephippia: 0.79 ± 0.11), suggesting that ephippial egg abortion and empty ephippia production are frequent in nature. This is the first study to describe Daphnia ephippial egg abortion and compare subitaneous and ephippial egg abortion between experimental and field conditions. This approach is recommended for future research into Daphnia or cladoceran reproduction.
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