Marcel Eens

Summary

Affiliation: University of Antwerp
Country: Belgium

Publications

  1. doi request reprint Can starling eggs be useful as a biomonitoring tool to study organohalogenated contaminants on a worldwide scale?
    Marcel Eens
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 51:141-9. 2013
  2. pmc Environmental effects shape the maternal transfer of carotenoids and vitamin E to the yolk
    Wendt Müller
    Department of Biology Ethology, University of Antwerp, 2610, Wilrijk, Belgium
    Front Zool 9:17. 2012
  3. doi request reprint Metallothioneins (MTs) and delta-aminolevulinic acid dehydratase (ALAd) as biomarkers of metal pollution in great tits (Parus major) along a pollution gradient
    Caroline Vanparys
    Laboratory of Ecophysiology, Biochemistry and Toxicology, Department of Biology, University of Antwerp, Groenenborgerlaan 171, B 2020 Antwerp, Belgium
    Sci Total Environ 401:184-93. 2008
  4. doi request reprint The use of blue tit eggs as a biomonitoring tool for organohalogenated pollutants in the European environment
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, Belgium
    Sci Total Environ 408:1451-7. 2010
  5. ncbi request reprint Variation, levels and profiles of organochlorines and brominated flame retardants in great tit (Parus major) eggs from different types of sampling locations in Flanders (Belgium)
    Evi Van den Steen
    Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 34:155-61. 2008
  6. ncbi request reprint Predatory bird species show different patterns of hydroxylated polychlorinated biphenyls (HO-PCBs) and polychlorinated biphenyls (PCBs)
    Veerle L B Jaspers
    Department of Biology, Campus Drie Eiken, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Sci Technol 42:3465-71. 2008
  7. doi request reprint An exposure study with polybrominated diphenyl ethers (PBDEs) in female European starlings (Sturnus vulgaris): toxicokinetics and reproductive effects
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Pollut 157:430-6. 2009
  8. doi request reprint A comparison of non-destructive sampling strategies to assess the exposure of white-tailed eagle nestlings (Haliaeetus albicilla) to persistent organic pollutants
    Igor Eulaers
    Ethology Research Group, Department of Biology, University of Antwerp, Wilrijk, Belgium
    Sci Total Environ 410:258-65. 2011
  9. doi request reprint Brominated flame retardants and organochlorines in the European environment using great tit eggs as a biomonitoring tool
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 35:310-7. 2009
  10. ncbi request reprint Evaluation of biochemical effects related to perfluorooctane sulfonic acid exposure in organohalogen-contaminated great tit (Parus major) and blue tit (Parus caeruleus) nestlings
    Philippe Tony Hoff
    Department of Biology, Research Unit Ecophysiology, Biochemistry and Toxicology, University of Antwerp, Groenenborgerlaan 171, B 2020 Antwerp, Belgium
    Chemosphere 61:1558-69. 2005

Detail Information

Publications66

  1. doi request reprint Can starling eggs be useful as a biomonitoring tool to study organohalogenated contaminants on a worldwide scale?
    Marcel Eens
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 51:141-9. 2013
    ....
  2. pmc Environmental effects shape the maternal transfer of carotenoids and vitamin E to the yolk
    Wendt Müller
    Department of Biology Ethology, University of Antwerp, 2610, Wilrijk, Belgium
    Front Zool 9:17. 2012
    ..abstract:..
  3. doi request reprint Metallothioneins (MTs) and delta-aminolevulinic acid dehydratase (ALAd) as biomarkers of metal pollution in great tits (Parus major) along a pollution gradient
    Caroline Vanparys
    Laboratory of Ecophysiology, Biochemistry and Toxicology, Department of Biology, University of Antwerp, Groenenborgerlaan 171, B 2020 Antwerp, Belgium
    Sci Total Environ 401:184-93. 2008
    ....
  4. doi request reprint The use of blue tit eggs as a biomonitoring tool for organohalogenated pollutants in the European environment
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, Belgium
    Sci Total Environ 408:1451-7. 2010
    ..In conclusion, our results suggest the usefulness of eggs from passerine birds as a biomonitoring tool for OHPs on a large geographical scale...
  5. ncbi request reprint Variation, levels and profiles of organochlorines and brominated flame retardants in great tit (Parus major) eggs from different types of sampling locations in Flanders (Belgium)
    Evi Van den Steen
    Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 34:155-61. 2008
    ..In conclusion, our results showed that the characteristics of a sampling location influence both the levels and profiles of PCBs, OCPs and PBDEs...
  6. ncbi request reprint Predatory bird species show different patterns of hydroxylated polychlorinated biphenyls (HO-PCBs) and polychlorinated biphenyls (PCBs)
    Veerle L B Jaspers
    Department of Biology, Campus Drie Eiken, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Sci Technol 42:3465-71. 2008
    ..Variation in the diet and species-specific accumulation and metabolism of PCBs are probably the most important causes for these differences. Correlations between HO-PCBs and their parent PCBs were only found significant for buzzards...
  7. doi request reprint An exposure study with polybrominated diphenyl ethers (PBDEs) in female European starlings (Sturnus vulgaris): toxicokinetics and reproductive effects
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Pollut 157:430-6. 2009
    ..In addition, egg weight and volume were significantly higher in the exposed group. These results suggest that, at the investigated exposure levels (150 microg sum PBDEs/bird), PBDEs may have a negative effect on reproductive performance...
  8. doi request reprint A comparison of non-destructive sampling strategies to assess the exposure of white-tailed eagle nestlings (Haliaeetus albicilla) to persistent organic pollutants
    Igor Eulaers
    Ethology Research Group, Department of Biology, University of Antwerp, Wilrijk, Belgium
    Sci Total Environ 410:258-65. 2011
    ..Finally, we provide an integrated discussion on the use of body feathers and preen oil as non-destructive biomonitor strategies for nestling predatory birds...
  9. doi request reprint Brominated flame retardants and organochlorines in the European environment using great tit eggs as a biomonitoring tool
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 35:310-7. 2009
    ..To our knowledge, this is the first study in which bird eggs were used as a monitoring tool for OHPs on such a large geographical scale...
  10. ncbi request reprint Evaluation of biochemical effects related to perfluorooctane sulfonic acid exposure in organohalogen-contaminated great tit (Parus major) and blue tit (Parus caeruleus) nestlings
    Philippe Tony Hoff
    Department of Biology, Research Unit Ecophysiology, Biochemistry and Toxicology, University of Antwerp, Groenenborgerlaan 171, B 2020 Antwerp, Belgium
    Chemosphere 61:1558-69. 2005
    ..None of the investigated organohalogen pollutants except for PFOS were suggested to be involved in the observed biological alterations...
  11. doi request reprint The relationship between perfluorinated chemical levels in the feathers and livers of birds from different trophic levels
    Johan Meyer
    Ecophysiology, Biochemistry and Toxicology Research Unit, Department of Biology, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
    Sci Total Environ 407:5894-900. 2009
    ..In general, birds from a higher trophic level had higher PFC levels in their tissues. This indicates that diet plays a role in PFC exposure in birds and confirms the bioaccumulation potential of PFC...
  12. doi request reprint Effects of laying order and experimentally increased egg production on organic pollutants in eggs of a terrestrial songbird species, the great tit (Parus major)
    Evi Van den Steen
    Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Sci Total Environ 407:4764-70. 2009
    ..To our knowledge, this is the first study in which the impact of an experimentally increased clutch size on the levels and profiles of contaminants in eggs has been investigated...
  13. doi request reprint Food conditions affect yolk testosterone deposition but not incubation attendance
    Jonas Vergauwen
    Department of Biology Ethology, University of Antwerp, Universiteitsplein 1, 2610 Antwerp Wilrijk, Belgium
    Gen Comp Endocrinol 176:112-9. 2012
    ..This suggests that canary females respond to food manipulations mainly via changes in clutch size rather than by altering the degree of hatching asynchrony...
  14. ncbi request reprint In vivo MR imaging of the seasonal volumetric and functional plasticity of song control nuclei in relation to song output in a female songbird
    Vincent Van Meir
    Bio Imaging Lab, University of Antwerp, Groenenborgerlaan 171 Gebouw V, B 2020 Antwerp, Belgium
    Neuroimage 31:981-92. 2006
    ....
  15. doi request reprint Maternal transfer of organochlorines and brominated flame retardants in blue tits (Cyanistes caeruleus)
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 35:69-75. 2009
    ..Maternal transfer in blue tits seemed to be selective for the more bioaccumulative and persistent congeners/compounds...
  16. doi request reprint Haematological status of wintering great tits (Parus major) along a metal pollution gradient
    Ann Geens
    Department of Biology, University of Antwerp, Ethology, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Sci Total Environ 408:1174-9. 2010
    ..Our results indicate that the haematological status of great tits is negatively affected by metal pollution and may therefore be used as a successful biomarker for monitoring the negative impact of metal exposure in the wild...
  17. doi request reprint Ecological and spatial factors drive intra- and interspecific variation in exposure of subarctic predatory bird nestlings to persistent organic pollutants
    Igor Eulaers
    Ethology Research Group, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 57:25-33. 2013
    ..This methodological approach further promotes the promising use of nestling predatory bird body feathers as a non-destructive sampling strategy to integrate various toxicological and ecological proxies...
  18. doi request reprint Interspecific differences in concentrations and congener profiles of chlorinated and brominated organic pollutants in three insectivorous bird species
    Tom Dauwe
    Department of Biology, University of Antwerp, Universiteitsplein 1, B2610 Antwerp, Belgium
    Environ Int 35:369-75. 2009
    ..The high p,p'-DDT/p,p'-DDE ratio has previously been described in lapwings, which suggests that low p,p'-DDE accumulation in eggs might be inherent for this species...
  19. doi request reprint Body feathers as a potential new biomonitoring tool in raptors: a study on organohalogenated contaminants in different feather types and preen oil of West Greenland white-tailed eagles (Haliaeetus albicilla)
    Veerle L B Jaspers
    Department of Biology, University of Antwerp, Wilrijk, Belgium
    Environ Int 37:1349-56. 2011
    ..Washing with acetone therefore does not seem to be of great influence when relating to internal tissue concentrations. We recommend washing feathers only with distilled water in order to remove dirt and dust particles before analysis...
  20. doi request reprint Endocrine disrupting, haematological and biochemical effects of polybrominated diphenyl ethers in a terrestrial songbird, the European starling (Sturnus vulgaris)
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Sci Total Environ 408:6142-7. 2010
    ..All together, our results suggest that European starlings, similar to other passerine species, may be less sensitive to the effects of organohalogenated pollutants, such as PBDEs, than other bird species...
  21. doi request reprint A first evaluation of the usefulness of feathers of nestling predatory birds for non-destructive biomonitoring of persistent organic pollutants
    Igor Eulaers
    University of Antwerp, Ethology Research Group, Department of Biology, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    Environ Int 37:622-30. 2011
    ..In summary, our results indicate that the use of nestling feathers of northern raptors may be a valid and promising non-destructive biomonitoring strategy for POPs in their ecosystems...
  22. doi request reprint Organohalogenated contaminants in eggs of rockhopper penguins (Eudyptes chrysocome) and imperial shags (Phalacrocorax atriceps) from the Falkland Islands
    Evi Van den Steen
    Laboratory of Ethology, Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, Belgium
    Sci Total Environ 409:2838-44. 2011
    ..Although our results showed that OHCs have also reached the Falkland Islands, concentrations were relatively low compared to other studies. However, future monitoring may be warranted to assess temporal trends of different OHCs...
  23. ncbi request reprint PFOS levels in the blood and liver of a small insectivorous songbird near a fluorochemical plant
    Tom Dauwe
    Department of Biology, University of Antwerp, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Environ Int 33:357-61. 2007
    ..No significant sex differences were found. A highly significant correlation between liver and blood concentrations indicates the usefulness of blood as a non-destructive matrix for biomonitoring purposes...
  24. doi request reprint Complex modulation of singing behavior by testosterone in an open-ended learner, the European Starling
    Alain J M Van Hout
    University of Antwerp, Research Group of Ethology, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Horm Behav 56:564-73. 2009
    ....
  25. ncbi request reprint Brominated flame retardants and organochlorine pollutants in eggs of little owls (Athene noctua) from Belgium
    Veerle Jaspers
    Department of Biology, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Pollut 136:81-8. 2005
    ..No significant correlations were found between eggshell thickness and the analysed organohalogens...
  26. doi request reprint Structural changes between seasons in the songbird auditory forebrain
    Geert De Groof
    Bio Imaging Laboratory, University of Antwerp, Antwerp, Belgium
    J Neurosci 29:13557-65. 2009
    ..This study extends our view on a seasonally dynamic avian brain which not only hones its song control system but also auditory and social systems to be prepared for the breeding season...
  27. doi request reprint Perfluoroalkyl substances in soft tissues and tail feathers of Belgian barn owls (Tyto alba) using statistical methods for left-censored data to handle non-detects
    Veerle L B Jaspers
    Department of Biology, University of Antwerp, Universiteitsplein 1, Wilrijk, Belgium
    Environ Int 52:9-16. 2013
    ..Therefore the possibility of using feathers as a passive air sampler for high PFOA levels should be investigated in the future...
  28. pmc Non-breeding song rate reflects nutritional condition rather than body condition
    Alain J M Van Hout
    Research Group of Ethology, University of Antwerp, Wilrijk, Belgium
    PLoS ONE 7:e36547. 2012
    ....
  29. pmc Can predatory bird feathers be used as a non-destructive biomonitoring tool of organic pollutants?
    Veerle L B Jaspers
    University of Antwerp, Department of Biology, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Biol Lett 2:283-5. 2006
    ..84 when excluding 17 starved birds). Our findings provide the first indication that feathers of predatory birds could be useful in non-destructive biomonitoring of organic pollutants, although further validation may be necessary...
  30. doi request reprint Does anthropogenic metal pollution affect carotenoid colouration, antioxidative capacity and physiological condition of great tits (Parus major)?
    Ann Geens
    Department of Biology, University of Antwerp, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Comp Biochem Physiol C Toxicol Pharmacol 150:155-63. 2009
    ..We found strong among brood variation in nestlings for all variables (except cholesterol), suggesting that there might be a considerable genetic and/or parental investment factor involved...
  31. doi request reprint A screening of persistent organohalogenated contaminants in hair of East Greenland polar bears
    Veerle L B Jaspers
    Department of Biology, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Sci Total Environ 408:5613-8. 2010
    ..Further research with larger sample weights and sizes is therefore necessary to draw more definitive conclusions on the usefulness of hair for biomonitoring OHCs in polar bears and other fur mammals...
  32. ncbi request reprint Relationships between metal concentrations in great tit nestlings and their environment and food
    Tom Dauwe
    Department of Biology, University of Antwerp, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Environ Pollut 131:373-80. 2004
    ..Our data suggest that excreta are a good monitor for the presence and concentrations of non-essential metals in the food and the environment of passerine birds...
  33. doi request reprint Melanin- and carotenoid-dependent signals of great tits (Parus major) relate differently to metal pollution
    Tom Dauwe
    Department of Biology, University of Antwerp, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Naturwissenschaften 95:969-73. 2008
    ..Our results also support the multiple messages hypothesis predicting that different signals highlight different aspects of geno- and phenotypic condition of the bearer...
  34. ncbi request reprint Feathers as a nondestructive biomonitor for persistent organic pollutants
    Tom Dauwe
    Department of Biology, University of Antwerp, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Environ Toxicol Chem 24:442-9. 2005
    ..This temporal difference may have been caused by seasonal changes in lipid reserves. Although further research is required, feathers appear to be a promising new, nondestructive biomonitor for PCBs and DDTs in avian wildlife...
  35. doi request reprint Sources of variation in yolk hormone deposition: consistency, inheritance and developmental effects
    Wendt Müller
    Department of Biology Ethology, University of Antwerp, Belgium
    Gen Comp Endocrinol 175:337-43. 2012
    ....
  36. ncbi request reprint The reproductive success and quality of blue tits (Parus caeruleus) in a heavy metal pollution gradient
    Tom Dauwe
    Department of Biology, University of Antwerp Campus Drie Eiken, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Environ Pollut 136:243-51. 2005
    ..Our results suggest that exposure to heavy metal pollution did not influence blue tit reproduction in an important way...
  37. doi request reprint Elevated yolk androgen levels and the expression of multiple sexually selected male characters
    Wendt Müller
    Department of Biology Ethology, University of Antwerp, Universiteitsplein 1, Antwerp, Wilrijk, Belgium
    Horm Behav 55:175-81. 2009
    ..Our results suggest that this may relate to the numerous other environmental and/or genetic factors influencing the expression of sexually selected male characters...
  38. ncbi request reprint The importance of exogenous contamination on heavy metal levels in bird feathers. A field experiment with free-living great tits, Parus major
    Veerle Jaspers
    University of Antwerp, Campus Drie Eiken, Department of Biology, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    J Environ Monit 6:356-60. 2004
    ..Consequently, the concentrations of zinc and mercury in feathers are probably primarily due to endogenous deposition...
  39. ncbi request reprint Seasonal fluctuations in plasma testosterone levels and diurnal song activity in free-living male great tits
    Els Van Duyse
    Department of Biology, University of Antwerp, UIA, B 1260 Wilrijk, Belgium
    Gen Comp Endocrinol 134:1-9. 2003
    ..Peak plasma T levels did not occur during the egg laying stage when dawn song activity is maximal, suggesting that there is no strong causal relationship between the two...
  40. doi request reprint Testosterone increases repertoire size in an open-ended learner: an experimental study using adult male European starlings (Sturnus vulgaris)
    Alain J M Van Hout
    University of Antwerp, Research Group of Ethology, Wilrijk, Belgium
    Horm Behav 62:563-8. 2012
    ..Taken together, our results suggest a role for T in adult song learning and provide new insights into the information content of repertoire size and song bout length as sexually selected traits...
  41. ncbi request reprint The combined effect of lead exposure and high or low dietary calcium on health and immunocompetence in the zebra finch (Taeniopygia guttata)
    Tinne Snoeijs
    Behaviour and Ecology Research Group, Department of Biology, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    Environ Pollut 134:123-32. 2005
    ..This effect was not found in males, suggesting sexual differences in susceptibility of humoral immunity to lead treatment in zebra finches...
  42. ncbi request reprint Simultaneous treatment with an aromatase inhibitor and an anti-androgen decreases the likelihood of dawn song in free-living male great tits, Parus major
    Els Van Duyse
    Behaviour and Ecology Research Group, Department of Biology, University of Antwerp, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    Horm Behav 48:243-51. 2005
    ..Although the implants were present for the larger part of the breeding season, males were able to maintain control of a territory and mate and to complete their brood cycle as successful as control males...
  43. doi request reprint Preen oil as the main source of external contamination with organic pollutants onto feathers of the common magpie (Pica pica)
    Veerle L B Jaspers
    Department of Biology, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Environ Int 34:741-8. 2008
    ..In summary, the results of the current study highlight the usefulness of feathers for non-destructive biomonitoring of organic pollutants...
  44. ncbi request reprint Effects of heavy metal exposure on the condition and health of adult great tits (Parus major)
    Tom Dauwe
    Department of Biology, Campus Drie Eiken, University of Antwerp, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    Environ Pollut 140:71-8. 2006
    ..Haematocrit values did not differ significantly among sites. Overall, we found no clear significant effects of heavy metal pollution on morphological measurements and health parameters of great tits...
  45. ncbi request reprint Accumulation of organochlorines and brominated flame retardants in the eggs and nestlings of great tits, Parus major
    Tom Dauwe
    Department of Biology and Toxicological Center, University of Antwerp, Universiteitsplein 1, B 2610 Antwerp, Belgium
    Environ Sci Technol 40:5297-303. 2006
    ..Nestling birds may therefore not be good sentinels for local contamination with persistent pollutants...
  46. doi request reprint Historical metal pollution in natural gudgeon populations: Inferences from allozyme, microsatellite and condition factor analysis
    Dries Knapen
    University of Antwerp, Department of Biology, Ecophysiology, Biochemistry and Toxicology Research Group, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
    Aquat Toxicol 95:17-26. 2009
    ....
  47. doi request reprint Brominated and phosphorus flame retardants in White-tailed Eagle Haliaeetus albicilla nestlings: bioaccumulation and associations with dietary proxies (δ¹³C, δ¹⁵N and δ³⁴S)
    Igor Eulaers
    Ethology Group, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium Electronic address
    Sci Total Environ 478:48-57. 2014
    ..As such, both may have been a spatial proxy for anthropogenic disturbance, possible confounding their use as dietary proxy...
  48. pmc Penguin chicks benefit from elevated yolk androgen levels under sibling competition
    Maud Poisbleau
    Department of Biology Ethology, University of Antwerp, Wilrijk, Belgium
    PLoS ONE 7:e42174. 2012
    ..This contrasts to most previous studies in other species where yolk androgens have been shown to compensate for the negative consequences of delayed hatching within the brood hierarchy...
  49. doi request reprint Concentrations in bird feathers reflect regional contamination with organic pollutants
    Veerle L B Jaspers
    Department of Biology, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Sci Total Environ 407:1447-51. 2009
    ..In summary, feathers seem to reflect regional variations in contamination, which strengthens their usefulness as a non-destructive biomonitor for organic pollutants...
  50. pmc Intra-clutch ratio of yolk progesterone level changes with laying date in rockhopper penguins: a strategy to influence brood reduction?
    Maud Poisbleau
    Department of Biology Ethology, University of Antwerp, Wilrijk, Belgium
    PLoS ONE 6:e27765. 2011
    ..We also discuss these results, relating to yolk progesterone, in the broader context of other yolk steroids...
  51. doi request reprint Negative effects of yolk testosterone and ticks on growth in canaries
    Jonas Vergauwen
    Department of Biology Ethology, University of Antwerp, Wilrijk, Belgium
    J Exp Zool A Ecol Genet Physiol 315:553-61. 2011
    ..Thus, the effects of elevated yolk testosterone on growth may be dose-dependent or vary with the egg quality, suggesting prenatal context-dependency...
  52. ncbi request reprint Heavy metal exposure affects the humoral immune response in a free-living small songbird, the great tit (Parus major)
    Tinne Snoeijs
    Department of Biology, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    Arch Environ Contam Toxicol 46:399-404. 2004
    ..Further work is now necessary to establish a causal association between heavy metal contamination and immunosuppression...
  53. ncbi request reprint Urinary testosterone metabolite levels in captive bonobos: relationship with age
    Adinda Sannen
    Department of Biology, University of Antwerp, Antwerp, Belgium
    Folia Primatol (Basel) 75:107-10. 2004
  54. ncbi request reprint Differential effects of testosterone on neuronal populations and their connections in a sensorimotor brain nucleus controlling song production in songbirds: a manganese enhanced-magnetic resonance imaging study
    Vincent Van Meir
    Bio Imaging Laboratory, Department of Biomedical Sciences, University of Antwerp, B 2020 Antwerp, Belgium
    Neuroimage 21:914-23. 2004
    ..The slow time scales investigated by this technique (compared to functional MRI) appear ideally suited for characterizing slow processes such as those involved in brain plasticity and learning...
  55. ncbi request reprint Heavy metal pollution affects dawn singing behaviour in a small passerine bird
    Leen Gorissen
    Department of Biology, University of Antwerp CDE, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Oecologia 145:504-9. 2005
    ....
  56. pmc Hot or not: the effects of exogenous testosterone on female attractiveness to male conspecifics in the budgerigar
    Stefanie E P Lahaye
    University of Antwerp, Research Group Ethology, Antwerp, Belgium
    PLoS ONE 8:e74005. 2013
    ..Evaluating whether or not a potential constraint may arise from negative testosterone-induced effects on other fitness related traits in females requires further work. ..
  57. ncbi request reprint Certain aspects of bonobo female sexual repertoire are related to urinary testosterone metabolite levels
    Adinda Sannen
    Department of Biology, University of Antwerp, Antwerp, Belgium
    Folia Primatol (Basel) 76:21-32. 2005
    ..No correlation was found with the frequency of sexual presentations performed by the females and with the frequency of masturbation. We present a case study on this topic in an immigrating female...
  58. ncbi request reprint Fish community responses to metal pollution
    Lieven Bervoets
    Department of Biology, Ecophysiology, Biochemistry and Toxicology Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
    Environ Pollut 138:338-49. 2005
    ..The IBI proved a suitable index for the assessment of metal pollution, provided that other water quality characteristics meet the water quality criteria...
  59. pmc GnRH--a missing link between testosterone concentrations in yolk and plasma and its intergenerational effects
    Wendt Müller
    Department of Biology Ethology, University of Antwerp, Antwerp, Belgium
    PLoS ONE 6:e22675. 2011
    ....
  60. doi request reprint Acute stress induces a rapid increase of testosterone in a songbird: implications for plasma testosterone sampling
    Alain J M Van Hout
    University of Antwerp, Research Group of Ethology, Wilrijk, Belgium
    Gen Comp Endocrinol 168:505-10. 2010
    ..Furthermore, it is necessary for future studies to examine the effect of using different capture techniques on measured plasma T levels, which may be of particular importance when interpreting T samples gathered in field studies...
  61. pmc Songs differing in consistency elicit differential aggressive response in territorial birds
    Hector Fabio Rivera-Gutierrez
    University of Antwerp, Ethology Group, Campus Drie Eiken, Universiteitsplein 1, 2610 Wilrijk, Belgium
    Biol Lett 7:339-42. 2011
    ....
  62. pmc Carotenoid supplementation positively affects the expression of a non-visual sexual signal
    Alain J M Van Hout
    Research Group of Ethology, University of Antwerp, Wilrijk, Belgium
    PLoS ONE 6:e16326. 2011
    ..Given that song rate is an acoustic signal rather than a visual signal, our findings therefore indicate that the role of carotenoids in (sexual) signalling need not be dependent on their function as pigments...
  63. pmc Difficulties when assessing birdsong learning programmes under field conditions: a re-evaluation of song repertoire flexibility in the great tit
    Hector F Rivera-Gutierrez
    Ethology Group, University of Antwerp, Wilrijk, Belgium
    PLoS ONE 6:e16003. 2011
    ..We argue that a rigorous and standardized assessment of the repertoire is essential when studying age- or playback-induced changes in repertoire size and composition under field conditions...
  64. pmc Females paired with new and heavy mates reduce intra-clutch differences in resource allocation
    Maud Poisbleau
    Department of Biology Ethology, University of Antwerp, Wilrijk, Belgium
    PLoS ONE 8:e72136. 2013
    ..In species with brood reduction, it may be more adaptive for females to modulate the distribution of resources within the clutch according to breeding conditions, than to change their total clutch provisioning. ..
  65. ncbi request reprint Effects of heavy metal exposure on the condition and health of nestlings of the great tit (Parus major), a small songbird species
    Ellen Janssens
    Department of Biology, University of Antwerp U I A, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    Environ Pollut 126:267-74. 2003
    ..We also observed growth abnormalities of the legs near the pollution source. Tarsus length, wing length and haematocrit values did not differ significantly among study sites...
  66. ncbi request reprint Female presence affects male behavior and testosterone levels in the European starling (Sturnus vulgaris)
    Rianne Pinxten
    Department of Biology, University of Antwerp, UIA, Universiteitsplein 1, B 2610 Wilrijk, Belgium
    Horm Behav 44:103-9. 2003
    ....