By Eugene H. Kaplan
With greater than 500 species defined and greater than four hundred illustrations, this advisor presents fast and simple visible identity of fishes, mollusks, sponges, shrimps, lobsters, crabs, and masses extra of the fauna came upon at the coral reefs of the Caribbean and Florida.
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Additional info for A Field Guide to Coral Reefs Caribbean and Florida (Peterson Field Guides)
Fishelson, L. 1995. Ontogenesis of cytological structures around the yolk sac during embryologic and early larval development of some cichlid fishes. Journal of Fish Biology 47(3):479–491. J. 1993. Multiple functions of free amino acids during embryogenesis in marine fishes. , and Jorgen-Fyhn, H. ) Physiological and Biochemical Aspects of Fish Development. University of Bergen, Norway, pp. 299–308. , et al. 2001. Development of the digestive tract of sea bass (Dicentrarchus labrax L). Light and electron microscopic studies.
2008; see also the discussion in Chapter 14). Although there are a wide variety of nutritional condition indices, this section will only cover those related to digestive system organization (histological biomarkers) and function (pancreatic and intestinal enzyme activities). In vertebrates, different organs of the digestive system have been shown to employ different cellular mechanisms in response to diet quantity and quality. Thus, the use of the intestine and digestive accessory glands as target organs of the nutritional and physiological status in fish is well known and, up to a certain limit, standardized.
In addition, alterations in fatty acid metabolism derived from unbalanced diets have resulted in modifications of nuclei shape and size, chromatin density, and cytoplasmatic lipid deposition in hepatocytes (Caballero et al. 1999; Mobin et al. 2000). Disorders in glycogen and protein synthesis and/or their utilization may also result in an increased level of basophilia in the cytoplasm of the hepatocytes of larvae fed unbalanced diets (Segner et al. 1994; Mobin et al. 2000). The earlier differentiation and morphogenesis of the exocrine pancreas in comparison with that of the liver or intestine facilitates its use as a histological index for assessing the condition of the larva as soon as it emerges from the egg envelope.