• Publications
  • Influence
Colour polymorphism in birds: causes and functions
We studied polymorphism in all species of birds that are presently known to show intraspecific variation in plumage colour. At least three main mechanisms have been put forward to explain theExpand
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Heavy Metal, Organochlorine Pesticide, and PCB Residues in Eggs and Feathers of Herons Breeding in Northern Italy
Abstract. We report on organochlorine pesticide and PCB concentrations in eggs of the little egret, Egretta garzetta, and the black-crowned night-heron, Nycticorax nycticorax, collected in 1993–1994,Expand
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Egrets as Monitors of Trace-Metal Contamination in Wetlands of Pakistan
Environments in Pakistan are subject to increasing pollution, but previous studies were very scanty. During 1999 and 2000, we assessed trace element contamination at three wetlands, Karachi HarbourExpand
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The value of rice fields as substitutes for natural wetlands for waterbirds in the Mediterranean region.
-The natural wetlands of the Mediterranean have been reduced to 10-20% of their original area over the past few centuries. However, the rice fields that have supplanted them in some regions may beExpand
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Avian feathers as a non-destructive bio-monitoring tool of trace metals signatures: a case study from severely contaminated areas.
The concentrations of trace metals were assessed using feathers of cattle egrets (Bubulcus ibis), collected within two industrial areas of Pakistan, Lahore and Sialkot. We found, in order ofExpand
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Male-male combats in a polymorphic lizard: residency and size, but not color, affect fighting rules and contest outcome.
Theoretical models predict that the outcome of dyadic agonistic encounters between males is influenced by resource-holding potential, resource value, and intrinsic aggressiveness of contestants.Expand
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Little Egrets (Egretta Garzetta) and Trace-Metal Contamination in Wetlands of China
The rapidly developing Asian countries may face threatening environmental contamination, that however remains largely unassessed. We studied persistent trace elements in three wetlands, Poyang Lake,Expand
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Activity and home range of Testudo hermanni in Northern Italy
We describe the behavioral adaptations of a population of Hermann's tortoise to the climate of a northern sector of its range, and to a wooded biotope that is uncommon for the species. The activity,Expand
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Evaluation of Rana snk esculenta blood cell response to chemical stressors in the environment during the larval and adult phases.
The assessment of the biological effects on aquatic vertebrate species is frequently employed to monitor water pollution, as it provides significant information on bioavailability and actualExpand
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Persistent Organic Pollutants in Little Egret Eggs from Selected Wetlands in Pakistan
The main goal of the present work has been to study the use of egret eggs to assess environmental pollution by POPs (HCB, HCHs, cyclodienes, DDTs and PCBs) in three Pakistani wetlands that areExpand
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