
Citation: | Borhan MANSOURI, Ebrahim HOSHYARI. 2012: Nickel concentration in two bird species from Hara Biosphere Reserve of southern Iran. Avian Research, 3(1): 54-59. DOI: 10.5122/cbirds.2012.0007 |
We investigated the levels of nickel in the feathers of the Western Reef Heron (Egretta gularis) and Siberian Gull (Larus heuglini) from the Hara Biosphere Reserve in southern Iran from November to December 2010. Analysis of variance shows that no significant differences in nickel levels were found between gender and age groups in either species, but it should be pointed out that the number of samples was small. Student t tests show that the amount of nickel in the feathers of the Siberian Gull was higher than in the Western Reef Heron. The level of nickel concentration in the Western Reef Heron was higher in females than in males; on the other hand, this level of concentration in the Siberian Gull was higher in males.
In the original version of this article, we published a figure showing a gap in the confidence intervals for body and tail due to data paucity for mid stages of moult progress. Here, we amended this problem adding data from the 2023 moulting season, during which we obtained 139 moult records from 98 individuals. The final sample size used for plotting these results are shown in the caption below. This amendment corroborates the conclusion already stated: body moult does not seem to be under physiological constraints, although primary moult appears to be tightly controlled to reduce aerodynamic losses.
The authors would like to apologise for any inconvenience caused.
Santi Guallar: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing. Javier Quesada: Funding acquisition, Resources, Validation, Visualization, Writing – review & editing.
We thank Dr. Pourkhabbaz, Mr. Nowrouzi and Mr. Salehi for their help throughout the project. Technical help was provided by H. Babaei.
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