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Identify of a tilapia pheromone released by dominant males that primes females ...
Keller-Costa, T.; Hubbard, Peter; Paetz, Christian; Nakamura, Yoko; Silva, José P. da; Rato, Ana; Barata, E. N.; Schneider, BerndKnowledge of the chemical identity and role of urinary pheromones in fish is scarce, yet necessary to understand the integration of multiple senses in adaptive responses and the evolution of chemical communication. In nature, Mozambique tilapia (Oreochromis mossambicus) males form hierarchies and females mate preferentially with dominant territorial males which they visit in aggregations or leks.
Adaptation to different salinities exposes functional specialization in the int...
Gregório, SÃlvia F.; Carvalho, Edison Samir Mascarelhas; Encarnação, Sandra; Wilson, J.; Power, Deborah; Canario, Adelino V. M.; Fuentes, J.The processing of intestinal fluid, in addition to a high drinking rate, is essential for osmoregulation in marine fish. This study analyzed the long-term response of the sea bream (Sparus aurata L.) to relevant changes of external salinity (12, 35 and 55ï€ p.p.t.), focusing on the anterior intestine and in the less-often studied rectum. Intestinal water absorption, epithelial HCO3– secretion and gene express...
Functional characterization and evolution ofPTH/PTHrP receptors: insights from ...
Pinheiro, Pedro L. C.; Cardoso, João; Power, Deborah; Canario, Adelino V. M.The parathyroid hormone (PTH)-family consists of a group of structurally related factors that regulate calcium and bone homeostasis and are also involved in development of organs such as the heart, mammary gland and immune system. They interact with specific members of family 2 B1 G-protein coupled receptors (GPCRs), which have been characterised in teleosts and mammals. Two PTH/PTHrP receptors, PTH1R and PTH2R...
Heritability of cortisol response to confinement stress in European sea bass di...
Volckaert, F.; Hellemans, Bart; Batargias, C.; Louro, B.; Massault, C.; Van Houdt, Jeroen K. J.; Haley, Chris; De Koning, Dirk-JanIn fish, the most studied production traits in terms of heritability are body weight or growth, stress or disease resistance, while heritability of cortisol levels, widely used as a measure of response to stress, is less studied. In this study, we have estimated heritabilities of two growth traits (body weight and length) and of cortisol response to confinement stress in the European sea bass.FindingsThe F1 pro...
Prolactin regulates luminal bicarbonate secretion in the intestine of the sea b...
Ferlazzo, A.; Carvalho, E. S. M.; Gregorio, S. F.; Power, Deborah; Canario, Adelino V. M.; Tischitta, F.; Fuentes, J.The pituitary hormone prolactin is a pleiotropic endocrine factor that plays a major role in the regulation of ion balance in fish, with demonstrated actions mainly in the gills and kidney. The role of prolactin in intestinal ion transport remains little studied. In marine fish, which have high drinking rates, epithelial bicarbonate secretion in the intestine produces luminal carbonate aggregates believed to pl...
Skin healing and scale regeneration in fed and unfed sea bream, Sparus auratus
Vieira, Florbela A.; Gregório, Sílvia F.; Ferraresso, Serena; Thorne, Michael A. S.; Costa, Rita; Milan, Massimo; Bargelloni, Luca; Clark, M. S.Abstract Background Fish scales are an important reservoir of calcium and phosphorus and together with the skin function as an integrated barrier against environmental changes and external aggressors. Histological studies have revealed that the skin and scales regenerate rapidly in fish when they are lost or damaged. In the present manuscript the histological and molecular changes underlying skin and scale rege...
Free and conjugated androgen and progestin levels in the serum of stellate stur...
Bayunova, L.; Semenkova, T.; Canario, Adelino V. M.; Gerasimov, A.; Barannikova, I.Based on the supposition that female coelomic fluid contents have a certain chemical influence on sturgeons, blood serum concentrations of free and conjugated testosterone (T), 11-ketotestosterone (11KT), 17,20b,21-trihydroxy-4-pregnen- 3-one (20bS), 17,20b-dihydroxy-4-pregnen-3-one (DHP), 11-desoxycortisol (S) and free progesterone (P4) have been measured by radioimmunoassay (RIA) and enzyme-linked immuno-sorb...
Olfactory sensitivity to bile fluid and bile salts in the European eel (Anguill...
Huertas, M.; Hagey, L.; Hofmann, A. F.; Cerda, J.; Canario, Adelino V. M.; Hubbard, PeterTeleosts have high olfactory sensitivity to bile salts. To assess whether this phenomenon is involved in intra-specific chemical communication alone, or is part of a more ‘broad range’ sensitivity to bile salts produced by heterospecifics, we investigated possible differences in the odour of bile between the sexes and among different species – the eel (Anguilla anguilla), goldfish (Carassius auratus) and Mozamb...
Gill transcriptome response to changes in environmental calcium in the green sp...
Pinto, Patricia; Matsumura, H.; Thorne, Michael A. S.; Power, Deborah; Terauchi, Ryohei; Reinhardt, Richard; Canario, Adelino V. M.Abstract Background Calcium ion is tightly regulated in body fluids and for euryhaline fish, which are exposed to rapid changes in environmental [Ca2+], homeostasis is especially challenging. The gill is the main organ of active calcium uptake and therefore plays a crucial role in the maintenance of calcium ion homeostasis. To study the molecular basis of the short-term responses to changing calcium availabilit...
The European sea bass Dicentrarchus labrax genome puzzle: comparative BAC-mappi...
Kuhl, H.; Beck, Alfred; Wozniak, Grzegorz; Canario, Adelino V. M.; Volckaert, F.; Reinhardt, RichardAbstract Background Food supply from the ocean is constrained by the shortage of domesticated and selected fish. Development of genomic models of economically important fishes should assist with the removal of this bottleneck. European sea bass Dicentrarchus labrax L. (Moronidae, Perciformes, Teleostei) is one of the most important fishes in European marine aquaculture; growing genomic resources put it on its w...
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