خيارات البحث
النتائج 31 - 40 من 58
World trends in population, resources, and relevant political leadership [Includes food, water and energy outlook].
1977
Muller R.
Long-term toxic effects of DDT food and water exposure on fathead minnows (Pimephales promelas).
1977
Jarvinen A.W. | Hoffman M.J. | Thorslund T.W.
International development of food resources: By the effective use of irrigation water and technical innovations.
1977
Ienaga Y.
First evaluation of water fertility and food sources for ichthyofauna in modulo experimental de Mantecal [Venezuela]
1977
Danielewski, S. | Ramos, S.
Water problems [restrict the output of agricultural products] in the Indus food machine [On-farm irrigation, Pakistan].
1977
Johnson S.H. III | Early A.C. | Lowdermilk M.K.
Metodos para determinar humedades de equilibrio y contenido de agua en productos alimenticios.
1977
Vega V R. | Correa H H. | Gruttner D E.
Quantitative analysis of food products by pulsed n.m.r. rapid determination of oil and water in flour and feedstuffs.
1977
Hester R.E. | Quine D.E.C.
El agua de coco como sustrato para la produccion de levadura-alimento [Coccos nucifera].
1977
Gutierrez C G.M. | Basto A L.E.
The daily food intake of young soles (Solea solea L.) in relation to their size and the water temperature النص الكامل
1977
Fonds, M. | Saksena, V.p.
Daily food intake of young soles, from 8 to 30 am length, was measured in the laboratory at five constant temperatures from 10 to 26°C. The daily consumption (C) was correlated with length (L, cm) and weight (W, g) of the fish, which resulted in the following exponential relationships with temperature (T, °C) : c = O.OOOOll e°'Zb TJ3.20-0.0096T-0.0026T2) n - n nna 0.18T „(1.12-0.013T-0.00055T2) C — 0.Quo e , w . It appears that the daily food consumption of small soles is maximal at high temperatures (26°C for 10 cm fish). With increasing size of the fish the temperature for maximum feeding shifts to lower values (16°C for a 50 am fish). The daily food consumption expressed as percentage of the metabolic weight of the fish (C = % 8) appears to be independant of fish size at about 16°C. Higher temperatures are more favourable for the smaller fish, lower temperatures for the larger fish. This may explain why young soles need coastal nurseries with a high summer temperature and a rich food supply, while the adult fish find optimum conditions at lower temperatures offshore | La consommation quotidienne en nourriture de jeunes soles, de 6 à 30 cm de long, a été mesurée au laboratoire, à 5 températures constantes, de 10 à 26°C. Cette consommation quotidienne (C) a été reliée à la longueur (L, cm) et au poids (W, g) des poissons, fournissant avec la température (T, °C) les relations exponentielles suivantes : C = 0.000011 e0-35 T.l(3-20-0.0096T-0.C026t2) C = 0.006 eO.18Tjl.l2-O.Ol3T-O.O0O55T2) Il apparaît que la consommation quotidienne de petites soles est maximale à de hautes températures (26°C pour un poisson de 10 cm). Lorsque la taille du poisson augmente, la température de consommation maximale glisse vers des valeurs plus basses (16°C pour un poisson de 50 cm). La consommation de nourriture quotidienne, exprimée en pourcentage du poids métabolique du poisson (C = % \fi>8) se montre indépendante de sa taille aux environs de 16°C. Des températures plus élevées sont plus favorables à des poissons plus petits, des températures plus basses à des poissons plus grands. Cela peut expliquer pourquoi les jeunes soles ont besoin de nurseries côtières, avec une température estivale élevée, et une nourriture abondante, tandis que l'adulte trouve des conditions optimales à des températures plus basses, au large.
اظهر المزيد [+] اقل [-]Epurarea apelor uzate şi valorificarea reziduurilor din industria alimentară şi zootehnie | Purification of waste water and the development of residues in the food industry and zootechnology
1977
Chiriac, Vasile