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| Fontaínhas-Fernandes,A.; Gomes,E.F.; Reis-Henriques,Mª.A.; Coimbra,J.. |
| This trial was conducted in order to determine the effects of cortisol on salt water acclimation of tilapia Oreochromis niloticus (L.). Tilapia (n=42) were injected intraperitoneally with cortisol and then were directly transferred from freshwater (FW) to 15‰ salt water (SW). Changes in plasma osmolality, chloride ion concentration (Cl-), plasma level of cortisol and gill Na+, K+-ATPase activity were measured at 6, 12, 24, 48, 72 and 168 hours after transference to 15‰ SW. Plasma osmolality and Cl- increased immediately after transference until 12-24 h. The fish injected with cortisol (F) showed higher plasma levels of cortisol than those from control group (C) that maintained the initial levels during the experiment. Gill Na+, K+-ATPase activity of C fish... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tilapia Oreochromis niloticus; Freshwater; Salt water; Cortisol. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000500008 |
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| Kamel, M.S.; Eid, F.M.. |
| The seasonal changes of heat and salt storages in the offshore water of the Red Sea were studied using a historical data collected from different cruises during the period from 1924 to 1998. The heat storage within water column of different depths exhibits a seasonal variability. The heat storage is low during winter and high during summer. Also, the heat storage increases from north to south. The maximum values of heat storage are found in the southern central part of the Red Sea. It reached about 29.9x109 J/m2 within the water column of 300m depth. The seasonal change of heat storage from the annual mean is negative during winter and spring, while it is positive during summer and autumn. It has higher values during winter and summer, while its value... |
| Tipo: Journal Contribution |
Palavras-chave: Environments; Physical oceanography; Salt water; Physical oceanography; Environment. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1150 |
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| Hussenot, J.; Aloui, N.; El Abed, A.. |
| Pour augmenter la production de masse en salines tunisiennes de l’espèce locale Artemia tunisiana, nous avons entrepris d’optimiser l’emploi de fertilisants minéraux azotés et phosphorés. La première phase, présentée ici, a permis de choisir entre deux stratégies proposées dans des travaux internationaux, utilisant soit le phosphate double d’ammoniaque (DAP) et l’urée, soit le nitrate de potassium et le triple superphosphate. L’expérience a été menée avec 3 répliquats par traitement durant 44 jours. L’effet de chaque fertilisation a été significatif (p<0,10) comparé aux essais témoins, sur le développement de la biomasse microalgale, ainsi que sur la production de cystes et d’adultes d’Artemia, qui a été augmentée d’un facteur 2. La première stratégie... |
| Tipo: Journal Contribution |
Palavras-chave: Artemia culture; Biological fertilization; Salt; Fertilizers; Salt water; Http://aims.fao.org/aos/agrovoc/c_2867; Http://aims.fao.org/aos/agrovoc/c_14152. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/249 |
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