I have decided to talk about the methods that fishes use to regulate body temperature. So, this week I will focus on cold-blooded fishes ectotherms or poikilotherms and the next one, on the totally or partially warm-blooded endotherms. Cold-blooded animals, like most of the fishes, have to have the ability to tolerate a wide range of temperatures eurithermal organisms. The reason is that they have to function in several body temperatures in order to survive environmental temperature changes. So, independently of their endotherm or ectotherm condition, at the same time, animals can be thermoregulator or not.
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Relationship between ration size and dietary protein level varying at the expense of carbohydrate and lipid in triploid brown trout fry, Salmo trutta. Aquaculture, Effect of meal size modulation on growth performance and feeding rhythms in European sea bass Dicentrarchus labrax.
Effect of three feeding strategies automatic, ad libitum demand-feeding and time-restricted demand-feeding on feeding rhythms and growth in European sea bass Dicentrarchus labrax.
The effect of dietary protein level and source on growth, body composition, total ammonia and reactive phosphate excretion of growing sea bass Dicentrarchus labrax. BOIX J. Actas IV Cong. CHO C. Quantificaction of fish culture wastes by biological nutritinal methods and chemical limnological methods: the development of high nutrient dense HND diets. In: Cowey. Feeding systems for rainbow trout and other salmonids with reference to current estimates of energy and protein requirements.
Development of bioenergetic models and the Fish-PrFEQ software to estimate production, feeding ration and waste output in aquaculture. Living Resour. Comparison of nitrogenous losses in five teleost fish species. Effect of feeding frecuency, feeding level and temperature on energy metabolism in Sparus aurata.
Illa de Arosa Pontevedra , Energy requirements, utilization and dietary supply to salmonids. Nutritional bioenergetics and estimation of waste production in non-salmonids.
Predicting aquaculture waste from gilthead seabream Sparus aurata culture using a nutritional approach. Apparent digestibility coefficients of feed ingredients and their predictibility in compound diets for gilthead seabream Sparus aurata.
Aquaculture Nutrition, Energy and protein requirements for maintenance and growth in gilthead seabream Sparus aurata. Influence of the feeding level on growth, feed conversion, protein efficiency and chemical composition of juvenile european seabass. World Maricul.
Feeding and growth response of seabass Dicentrarchus labrax reared by four feeding methods. Growth of European sea bass fingerlings Dicentrarchus labrax fed extruded diets containing varying levels of protein, lipid and carbohydrate. VI Cong. Acuicultura, Cartagena Murcia. Effects of the dietary:protein ratio on growth and nutrient utilization in gilthead seabream Sparus aurata L. Aquaculture Nutrition, 5: Servicio de ayuda de la revista. Texto completo: PDF.
In: Cowey C.
Termorregulación de los insectos
It is the opposite of a homeotherm , an animal which maintains thermal homeostasis. While the term in principle can apply to all organisms , it is generally only applied to animals, and mostly to vertebrates. Usually the fluctuations are consequence of variation in the ambient environmental temperature. Many terrestrial ectotherms are poikilothermic. It is this distinction that often makes the term "poikilotherm" more useful than the vernacular "cold-blooded", which is sometimes used to refer to ectotherms more generally.
Clima y actividad en animales poiquilotermos