Tài liệu Mountain Goats Ecology, Behavior, and Conservation of an Alpine Ungulate doc

... 87 Implications of the Social Organization of Mountain Goats The social organization of mountain goats has several important implica- tions for behavior, population dynamics, and conservation, ... Density-Dependence and the Question of Population Regulation 177 11 Female Reproductive Strategy and Ungulate Population Dynamics 191 12 Management and Conservation...

Ngày tải lên: 17/02/2014, 17:20

... Energy and Conservation of Energy In this chapter we will introduce the following concepts: Potential Energy Conservative and non-conservative forces Mechanical Energy Conservation of Mechanical ... energy and vice versa. Frictional and drag forces on the other hand are called “non-conservative” for reasons that are explained below. Consider a system that consists of a...

Ngày tải lên: 23/12/2013, 00:16

... natural diet of most cultured fish and shellfish species consists of a wide diversity of phytoplankton species (diatoms, flagellates, etc.) and zooplankton organisms (copepods, cladocerans, decapod ... found in great abundance in the natural plankton. This abundance and maximal diversity of food organisms of different sizes and nutritional composition provide maximal cha...

Ngày tải lên: 15/12/2013, 00:15

... inoculation and early growth period. Because the density of the desired phytoplankton is low and the concentration of nutrients is high, any contaminant with a faster growth rate is capable of outgrowing ... stage, the animals are too fragile to be transferred to another plate and algal growth may be enhanced by increasing illumination intensity and/ or by the addition of f...

Ngày tải lên: 15/12/2013, 00:15

... concentration of 20 mg.l -1 to the algal culture tank, 24 h before rotifer inoculation can significantly reduce protozoan contamination. Screening and cleaning of the rotifers through the use of phytoplankton ... requires the use of aeration and cold storage. The following standard culture procedure has been developed and tested on several rotifer strains in 100 l tanks. C...

Ngày tải lên: 15/12/2013, 00:15

... A. franciscana superspecies: Americas, Carribean and Pacific islands, including populations reproductively isolated in nature like A.(franciscana) franciscana Kellogg 1906 and A.(franciscana) ... TEMPERATURE AND SALINITY TOLERANCE Both temperature and salinity significantly affect survival and growth, the effect of temperature being more pronounced. A broad range of tempera...

Ngày tải lên: 15/12/2013, 00:15

... Artemia cysts of a high hatching quality are often expensive, and decapsulation of non-hatching cysts means valorization of an otherwise inferior product. The cysts have the appearance and the practical ... function of the tank size and the density of cysts incubated. Excessive foaming can be reduced by disinfection of the cysts prior to hatching incubation and/ or by...

Ngày tải lên: 15/12/2013, 00:15

... Wille, M., Candreva, Y. and Lavens, P. 1995. Automation of live food in industrial zootechnics and economics. In: Larvi’95. Lavens, P., E. Jaspers and I. Roelants (Eds), European Aquaculture ... levels and DHA/EPA ratios to fish and crustacean larvae. Apart from EFA, other nutrients such as vitamins and pigments can be incorporated in Artemia. Fat soluble vitamins (especially...

Ngày tải lên: 15/12/2013, 00:15

... Dhont J., Lavens, P. and Sorgeloos, P. 1993. Preparation and use of Artemia as food for shrimp and prawn larvae. In: CRC Handbook of Mariculture. 2nd Edition. Vol 1: Crustacean Culture. J.V. Mc ... behavior of Artemia by affecting the filtration rate, ingestion rate and/ or assimilation: including the quality and quantity of the food offered, the developmental stage of...

Ngày tải lên: 15/12/2013, 00:15

... also an expensive and labour intensive job. COMBINATION OF ORGANIC AND INORGANIC FERTILIZERS A common practice is to use a combination of inorganic and organic fertilizers. While inorganic ... ORGANIC FERTILIZERS With the appearance of inorganic fertilizers the use of organic fertilizers has been questioned. In Table 4.5.4. we summarize advantages and disadvantages...

Ngày tải lên: 15/12/2013, 00:15