title: Temperature and age affect the life history characteristics and fatty acid profiles of Moina macrocopa (Cladocera).
abstract: Demographic responses and fatty acid profiles of Moina macrocopa were quantified under different temperature regimes (20°C, 25°C and 30°C and diurnally variable 20-30°C) and at fixed ration (10.65µgDWml(-1)) of Chlorella. Highest constant temperature (30°C) reduced the density of M. macrocopa. The cladocerans under the fluctuating temperature regime too had lower population growth (about 50% lower than that at constant 25°C). The survivorship of M. macrocopa was higher at 20°C than that at 25°C and 30°C or at variable temperature regime. Gross and net reproductive rates were higher at 25°C. At 20°C, neonates had the highest proportion (67%) of myristic, palmitic and stearic acids while the adults had the lowest (26%) proportion. For both adults and neonates, palmitoleic, linoleic and linolenic comprised of 15-35% of the total fatty acids. Higher percentage (19%) of linoleic acid was present in adults than neonates (7%). Adults had linolenic acid level which was 3-times higher than in neonates. Linoleic and linolenic fatty acids decreased with increasing temperature for neonates and adults from 20°C to 30°C. The demographic responses and fatty acid profiles of M. macrocopa were discussed in relation to level and mode of temperature exposure.
authors.affiliation: Carrera de Biología, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, Los Reyes, C.P. 54090 Tlalnepantla, State of Mexico, Mexico.
authors.forename: José Luis
authors.initials: JL
authors.lastname: Gama-Flores
authors.affiliation: Carrera de Biología, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, Los Reyes, C.P. 54090 Tlalnepantla, State of Mexico, Mexico.
authors.forename: María Elena
authors.initials: ME
authors.lastname: Huidobro-Salas
authors.affiliation: Laboratory of Aquatic Zoology, Division of Research and Postgraduate Studies, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, Los Reyes, C.P. 54090 Tlalnepantla, State of Mexico, Mexico. Electronic address: sarma@unam.mx.
authors.forename: S S S
authors.initials: SS
authors.lastname: Sarma
authors.affiliation: Laboratory of Aquatic Zoology, Division of Research and Postgraduate Studies, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, Los Reyes, C.P. 54090 Tlalnepantla, State of Mexico, Mexico.
authors.forename: S
authors.initials: S
authors.lastname: Nandini
authors.affiliation: Carrera de Biología, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, Los Reyes, C.P. 54090 Tlalnepantla, State of Mexico, Mexico.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Zepeda-Mejia
authors.affiliation: Department of Aquatic Ecology, NIOO/Netherlands Institute of Ecology, 6708 PB Wageningen, The Netherlands.
authors.forename: Ramesh D
authors.initials: RD
authors.lastname: Gulati
mesh_terms: D000064:Acclimatization; D000818:Animals; D033361:Cladocera / Q000254:growth & development / Q000502:physiology*; D005227:Fatty Acids / Q000378:metabolism*; D013696:Temperature
chemical_list: D005227:Fatty Acids
keywords: Cladocera; Demography; Fatty acids; Moina; Temperature