Tài liệu Body Size: The Structure and Function of Aquatic Ecosystems pptx

... detected and the processes that appeared to be important, and (ii) to compare freshwater and marine ecosystems. In Body Size: The Structure and Function of Aquatic Ecosystems, both those questions of ... individuals from some part of the size spectrum of the resource population. In addition, if the positions and shapes of the feeding niches themsel...

Ngày tải lên: 17/02/2014, 19:20

... verlap of the X-ray structure with the 30 °C NMR structure using the main chain of residues Ser12fiThr70 in the structure a lignment. (C) Overlap of X-ray structure o f TmAFP with theNMR structure ... and TmAFPwitheachotherandwithproteinsthathavea similar fold. Structure of sbwAFP and TmAFP The structure of sbwAFP has been determined by X-ray crystallograp...

Ngày tải lên: 19/02/2014, 16:20

... presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal ... Laboratory of Aquaculture and Artemia Reference Center University of Ghent Ghent, Belgium Food and Agriculture Organization of the United Nations Rome, 19...

Ngày tải lên: 15/12/2013, 00:15

... the advantage of allowing control of the quality of the cultures. The major difficulty in microscopic counts is reproducibility, which is a function of the sampling, diluting, and filling of ... Also, the quality of the harvested cells may be less predictable than that in continuous systems and for example vary with the timing of the harvest (time of...

Ngày tải lên: 15/12/2013, 00:15

... the lorica. The shape of the lorica and the profile of the spines and ornaments allow the determination of the different species and morphotypes (see 3.4.). The rotifer’s body is differentiated ... microalgae and at the same time guarantees the incorporation of high levels of EFA and vitamins in the rotifers. The biochemical composition of...

Ngày tải lên: 15/12/2013, 00:15

... expansion of aquaculture production in the 1970’s, the demand for Artemia cysts soon exceeded the offer and prices rose exponentially, turning Artemia into a bottleneck for the expansion of the hatchery ... (sensorial function) , the second antennae (locomotory + filter-feeding function) and the mandibles (food uptake function) . The ventral side is covered by a...

Ngày tải lên: 15/12/2013, 00:15

... diagram of the ultrastructure of an Artemia cyst is given in Fig. 4.2.1. Figure 4.2.1. Schematic diagram of the ultrastructure of an Artemia cyst. (modified from Morris and Afzelius, 1967) The ... over 80% of their cellular water, and upon interruption of the aeration, the now coffee- bean shaped decapsulated cysts settle out. After harvesting of these cysts o...

Ngày tải lên: 15/12/2013, 00:15

... for feeding the late larval and postlarval stages of penaeids. Freshly-hatched nauplii are usually offered at the start of the first mysis stage, and sometimes even earlier at the zoea-mysis ... hatchery production. The latter is particularly important since it was the missing link in the development of commercial production. Furthermore, the quality of the fr...

Ngày tải lên: 15/12/2013, 00:15

... influence the feeding 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 the ... evaluation of dry food is the consistency of the food quality and supply, and the possibility for storage without loss of quality. It follows therefore...

Ngày tải lên: 15/12/2013, 00:15

... soils, often found in mangrove areas. When exposed to the air, the pyrite of these soils oxidizes to form sulfuric acid. Of course liming of these soils is possible. However, the quantities of ... acidity of the bottom. The use of organic fertilizers increases the risk of infections. This risk can be reduced by composting the manure before use. One of the m...

Ngày tải lên: 15/12/2013, 00:15