Feather content of porphyrins in Eurasian eagle owl (Bubo bubo) fledglings depends on body condition and breeding site quality          下载免费PDF全文

Ismael GALVÁN  María del Mar DELGADO  Pablo R. CAMARERO  Rafael MATEO  Rui LOURENÇO  Vincenzo PENTERIANI 《Integrative zoology》2018,13(5):569-578

Porphyrins are pigments produced in most animal cells during the synthesis of heme, but their importance for external coloration is unclear. Owls (Order Strigiformes) are among the few animals that accumulate porphyrins in the integument, where it could serve as a means of signaling. Here we hypothesized that the porphyrin content of feathers may depend on body condition and breeding site quality in Eurasian eagle owl (Bubo bubo) fledglings and, thus, constitute amplifiers of the quality of the area where they are born. Using high‐performance liquid chromatography, we found 2 porphyrins (protoporphyrin IX and coproporphyrin III) in the body feathers of 19 eagle owl fledglings from 7 breeding territories. Coproporphyrin III, but not protoporphyrin IX feather concentration, was positively associated with the body mass of fledglings and with the quality of the breeding sites where they were reared with respect to food quality and availability. As coproporphyrin III is produced under oxidative stress, we suggest that good breeding sites may lead to fledglings in good condition. This, in turn, may make fledglings induce a certain level of free radical and coproporphyrin III production to signal to conspecifics their site‐mediated capacity to cope with oxidative stress. This is the first time that porphyrin content in the integument has been found to be related to individual quality, opening a new scenario for studying evolution of animal coloration.  相似文献   

Etomidate and telazol.   总被引：7，自引：0，他引：7  

L S Pablo  J E Bailey 《Veterinary Clinics of North America: Small Animal Practice》1999,29(3):779-792

These two drugs, etomidate and Telazol, have different pharmacological properties. The good properties of these drugs should be employed in specific patients and procedures to be performed (Table 3). There is no ideal injectable agent available yet for clinical practice. This in itself makes practice quite interesting because of the continuous process of rationalizing and determining the best drug for a specific condition and patient.  相似文献   

Seroprevalence of Toxoplasma gondii infection in sheep and alpacas (Llama pacos) in Chile     

Texia Gorman  Juan Pablo Arancibia  Myriam Lorca  David Hird  Hector Alcaino   《Preventive veterinary medicine》1999,40(3-4)

Serum samples from 408 sheep from different regions of Chile and 447 alpacas (Llama pacos) from the north of the country were tested for Toxoplasma gondii antibodies. The indirect haemagglutination test (IHAT) was used in both species and the indirect immunofluorescence test (IIFT) was also used on the sheep samples in order to compare the performance of the tests in that species. In both tests, titers ≥1:16 were considered diagnostically significant. Sera from 49 sheep (12%) were positive to T. gondii antibodies by the IHAT. When using the IIFT, 114 sheep sera (28%) were positive. The different results obtained in sheep sera between the tests were significant (p<0.0001). No differences were observed between geographical locations or sex of the sampled sheep regarding serological detection of T. gondii antibodies in sheep. As expected, adult sheep showed higher T. gondii reactivity than young sheep (p=0.0008). The corrected prevalence of toxoplasmosis in alpaca was 16.3% (32 positive out of 447). The rather low prevalence in alpacas may be associated with their extensive management as well as the extreme climatic conditions of The Andes which apparently would not be favorable for the transmission of the parasite.  相似文献   

Fine‐scale population structure and connectivity of bottlenose dolphins,Tursiops truncatus,in European waters and implications for conservation     

Milaja Nyknen  Marie Louis  Eileen Dillane  Eric Alfonsi  Simon Berrow  Joanne O'Brien  Andrew Brownlow  Pablo Covelo  Willy Dabin  Rob Deaville  Renaud de Stephanis  Franois Gally  Pauline Gauffier  Simon N. Ingram  Tamara Lucas  Luca Mirimin  Rod Penrose  Emer Rogan  Mnica A. Silva  Benoit Simon‐Bouhet  Oscar E. Gaggiotti 《水产资源保护:海洋与淡水生态系统》2019,29(Z1):197-211

Protein and cellulose level in diet: Effects on enzymatic activity,metabolite and amino acid profiles in freshwater anomurans Aegla uruguayana (Decapoda: Anomura)     

Gabriela E. Musin  Dbora A. Carvalho  María F. Viozzi  María C. Mora  Pablo A. Collins  Vernica Williner 《Aquaculture Research》2020,51(3):1232-1243

The aims of this study were to evaluate the short‐term effects of artificial diets with different protein: cellulose ratios (D1 = 60:0, D2 = 45:15 and D3 = 30:30) on the enzymatic activity and metabolite profile and to probe the suitability of the amino acid profile of the different diets in Aegla uruguayana. The different artificial diets affected the digestive total protease and amylase activities in a short period of time. Lipases were not affected by the diets. In the haemolymph, an effect of the diet was found in glucose and triglyceride measurements. Particularly, the glucose of the organisms fed D1 was significantly lower than that of organisms fed D2, without significant differences in D3. The concentrations of triglycerides were different among organisms subjected to the treatments, indicating a greater concentration in organisms fed D2 than in those fed D1. In muscle tissue, the concentration of glycogen followed the same trend as haemolymphatic glucose, indicating that the organisms fed D2 had a higher concentration of this metabolite compared to the rest. The amino acid profile of muscle tissue of wild and fed aeglids had a high and significant correlation in all cases, showing few changes in the short‐term feeding regime. Some changes were observed mainly in aeglids fed D3, which exhibited the lowest amounts of methionine, lysine and arginine and the highest amounts of aspartic + glutamic acids. In addition, D2 has a good quality of EAA, fulfilling almost all the requirements of a wild aeglid.  相似文献   

Evaluating the effects of landscape structure on the recovery of an invasive vertebrate after population control     

García-Díaz  Pablo  Anderson  Dean P.  Lurgi  Miguel 《Landscape Ecology》2019,34(3):615-626

Landscape Ecology - Effective landscape control of invasive species is context-dependent due to the interplay between the landscape structure, local population dynamics, and metapopulation...  相似文献   

The evolution of multiple‐insecticide resistance in UK populations of tomato leafminer,Tuta absoluta     

Charles Grant  Rob Jacobson  Aris Ilias  Madeleine Berger  Emmanouil Vasakis  Pablo Bielza  Christoph T Zimmer  Martin S Williamson  Richard H ffrench‐Constant  John Vontas  Emmanouil Roditakis  Chris Bass 《Pest management science》2019,75(8):2079-2085

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Predicting the growth of gilthead sea bream (Sparus aurata L.) farmed in marine cages under real production conditions using temperature- and time-dependent models     

Pablo Mayer  Vicente Estruch  Joan Blasco  & Miguel Jover 《Aquaculture Research》2008,39(10):1046-1052

The growth of gilthead sea bream ( Sparus aurata ) has been studied considering five multiple exponential regression models using data from 20 lots of gilthead sea bream growing in 20 marine cages from a Mediterranean commercial fish farm. The final weight ( W _f) of fish was predicted in relation to the initial weight ( W _i), time ( n ) and temperature ( T ), or the sum of effective temperatures (∑ T _ef). The estimated weight results from the simulation using the five models have been compared with the real final weight values using the mean of the absolute values of the prediction errors in short and long term (the precision value). All models presented a high determination coefficient, above 96%, and good prediction values in the short term. Regression models were tested using data from six new cages. The best models for predicting the growth of sea bream long term were the ones where final weight is expressed in relation to the initial weight and the sum of effective temperature,     and     obtaining long-term prediction errors 12.9% and 10.7% respectively.  相似文献   

Impact of starvation and handling stress on rigor development and quality of Atlantic salmon (Salmon salar L)     

Turid Mrkre  Pablo I. Mazo T.  Vildana Tahirovic  Olai Einen 《Aquaculture (Amsterdam, Netherlands)》2008,277(3-4):231-238

Farmed Atlantic salmon (Salmo salar L) were fed to satiation or starved for 35 d, and subjected to acute pre-slaughter stress or careful handling before slaughtering. Rigor development, post-mortem energy metabolism and quality variations were analysed during 72 h cold storage. The body weight averaged 2.9 and 3.5 kg of the fed and starved salmon, respectively. The starved salmon had lower condition factor (0.99 vs. 1.11) and higher slaughter yield (92.6 vs. 87.5%), but the fat content was similar (11.8–12.9%) in the fed and starved salmon. The initial glycogen level was lower in the starved salmon (21 vs. 29 μmol g^− 1), whereas initial ATP levels (6.4–6.6 μmol g^− 1) were not affected by starvation. Pre-slaughter stress accelerated rigor development, stimulated lactate formation through post-mortem glycolysis, and increased the breakdown of ATP and CP. The effect of stress on rigor development was less pronounced in starved salmon, and a significant interaction was observed between nutritional status and stress. Rigor development was closely correlated to ATP breakdown, especially in fillets. Acute stress accelerated flesh softening during ice storage. After 72 h storage, the fillets of the starved salmon exposed to careful slaughter handling had the significantly firmest texture, whereas the most intense fillet colour was observed in the starved/stressed salmon. Liquid leakage from the muscle during cold storage was lower in the starved salmon, but pre-slaughter stress had no significant impact. It is concluded that a starvation period of five weeks can improve the resistant to acute stress prior to slaughtering of Atlantic salmon that in turn hampers rigor development.  相似文献   

Ustilago and the accidental domestication of maize     

Juan Pablo Ricardo Martínez-Soriano  Katia Avia-Padilla 《Journal of Cereal Science》2009,50(2):302-303

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