19 documents found, page 1 of 2
Temporal variation in brain transcriptome is associated with the expression of ...
Cardoso, Sara D.; Gonçalves, David; Goesmann, Alexander; Canário, Adelino V.M.; Oliveira, Rui F.Distinct patterns of gene expression often underlie intra- and inter-sexual differences, and the study of this set of co-regulated genes is essential to understand the emergence of complex behavioural phenotypes. Here, we describe the development of a de novo transcriptome and brain gene expression profiles of wild-caught peacock blenny, Salaria pavo, an intertidal fish with sex-role reversal in courtship behav...
Olfactory transduction pathways in the Senegalese sole Solea senegalensis
Velez, Zélia; Hubbard, Peter C.; Barata, Eduardo N.; Canário, Adelino V.M.This study tested whether differences in sensitivity between the upper and lower olfactory epithelia of Solea senegalensis are associated with different odorant receptors and transduction pathways, using the electro-olfactogram. Receptor mechanisms were assessed by cross-adaptation with amino acids (L-cysteine, L-phenylalanine and 1-methyl-L-tryptophan) and bile acids (taurocholic acid and cholic acid). This su...
Muscular hypertrophy of urinary bladders in dominant tilapia facilitates the co...
Keller-Costa, Tina; Lopes, Orlando; Almeida, Olinda; Hubbard, Peter C.; Iacovella, Adele; Lima, Monica; Barata, Eduardo N.; Canário, Adelino V.M.The urination pattern of the Mozambique tilapia (Oreochromis mossambicus) depends on social context, and the olfactory potency of urine released depends on social rank (males) and reproductive status (females). This strongly suggests that urine mediates chemical communication in this species. The current study tested, firstly, whether urine production rate depends on sex or social status and, secondly, whether d...
Olfactory Sensitivity to Amino Acids in the Blackspot Seabream (Pagellus Bogara...
Barata, Eduardo N.; Ozorio, Rodrigo O.A.; Hubbard, Peter C.; Valente, Luisa M.P.; Canário, Adelino V.M.Intensive aquaculture is heavily dependent on high-quality fishmeal to meet their protein requirements. However, due to the increased demand, decreased availability, raising costs and the potential presence of organic and inorganic contaminants, it is of economical and environmental interest to replace fishmeal by a renewable protein sources. This is particularly challenging since replacing fishmeal may lack ap...
Seasonal cell differentiation and olfactory potency of secretions by the anal g...
Barata, Eduardo N.; Lopes, Orlando; Araújo, Jorge; Serrano, Rui M.; Hubbard, Peter C.; Canário, Adelino V.M.The current study shows cytological differences between the anal glands of pre-spawning and spawning peacock blennies Salaria pavo. The cytological differences in the anal gland coincide with higher olfactory potency of their secretions in spawning males, suggesting that seasonal differentiation of cell clusters secreting neutral mucins is related to the production and release of the putative sex pheromone.
11-Ketotestosterone stimulates putative sex pheromone production in the male pe...
Barata, Eduardo N.; Lopes, Orlando; Araújo, Jorge; Serrano, Rui M.; Hubbard, Peter C.; Canário, Adelino V.M.Male peacock blennies (Salaria pavo) release odors from their anal glands and, possibly, from their gonads that attract reproductive females. The current study investigated the effects of 11-ketotestosterone (KT) on development of the anal glands, testes, and accessory testicular organs as well as the subsequent olfactory potency of their secretions. After 3 wk of KT treatment (5 mg/kg in silastic implants), cl...
The effect of nest aggregation on the reproductive behaviour of the peacock ble...
Barata, Eduardo N.; Saraiva, João L.; Canário, Adelino V.M.; Oliveira, Rui F.The effect of nest aggregation in courtship behaviour was tested experimentally in an ecologically constrained, sex-role reversed population of the peacock blenny Salaria pavo. Mixed sex groups of eight males and eight females were tested in experimental tanks, containing eight potential nests either aggregated or dispersed. In the aggregated treatment, males spent more time inside their nests and monopolized o...
Prey odour enhances swimming activity and feed intake in the Senegalese sole
Barata, Eduardo N.; Hubert, François; Conceição, Luis E.C.; Velez, Zélia; Rema, Paulo; Hubbard, Peter C.; Canário, Adelino V.M.Olfaction is important in many aspects of the life-history of fishes including feeding, and more so in nocturnal benthic feeders. In the current study we assessed the importance of olfaction in food-search behaviour of the Senegalese sole, an economically important marine species both as farmed and wild-caught. Whole-body homogenates of the polychaete Diopatra neapolitana were fractionated by solid-phase extrac...
Identification, release and olfactory detection of bile salts in the intestinal...
Barata, Eduardo N.; Velez, Zélia; Hubbard, Peter C.; Welham, Kelvin; Hardege, Joerg; Canário, Adelino V.M.Olfactory sensitivity to bile salts is wide-spread in teleosts; however, which bile salts are released in sufficient quantities to be detected is unclear. The current study identified bile salts in the intestinal and bile fluids of Solea senegalensis by mass spectrometry–liquid chromatography and assessed their olfactory potency by the electro-olfactogram. The main bile salts identified in the bile were tauroch...
Adaptation to reduced salinity affects the olfactory sensitivity of Senegalese ...
Barata, Eduardo N.; Velez, Zélia; Hubbard, Peter C.; Canário, Adelino V.M.The Senegalese sole is a marine flatfish, which often penetrates into estuarine waters to feed. It cannot, however, survive in full freshwater. The current study investigated the effect of adaptation to low salinity (10‰) on olfactory responses to changes in environmental [Ca2+] and [Na+] and amino acids by the electro-encephalogram (EEG) recorded from the olfactory bulb. The sole showed olfactory responses to ...