Giorgos Catsadorakis

9 Questions 17 Answers 0 Followers

Questions related from Giorgos Catsadorakis

What are the reasons (habitat-related or social) why apparently physically suitable patches within a nesting colony of birds remain unoccupied?

We are doing research on a number of colonies of the Dalmatian and the Great White pelican trying to understand why some areas, apparantly suitable for nesting, lying adjacent to nesting units...

05 May 2021 3,074 0 View

Do you know any research on the Home Range of any Old World pelican species?

We are trying to estimate the Home Range of Dalmatian Pelican in Southeastern Europe and we want to locate any similar research may exist for any other pelican species of the Old World (5 species...

29 April 2021 5,884 2 View

Under which conditions ther might be a prolongation of the -standard- incubation period of a bird species and what is the upper limit it may reach?

The average incubation period for the Dalmatian pelican is 31-32 days. We have many indications that we may have prolongation of the incubation period in large numbers of these birds in Prespa...

18 February 2019 8,994 0 View

How do we define the home range of a non-migratory waterbird that uses several wetlands lying far away from each other during the annual cycle?

Dalmatian pelicans are huge piscivorous, non-migratory or short - distance migrant waterbirds in SE Europe. They spend their annual cycle using one up to several wetlands to cover their needs...

11 May 2017 4,853 5 View

Can anyone suggest literature on touch receptors on large birds' bills?

Birkhead in his book "Bird Sense" (2012) writes that unfortunately there is very little published about touch receptors in the bills of small birds. He also refers to the work of Herman Berkhoudt...

04 August 2016 3,357 3 View

How do Pelecaniformes locate and catch their fish prey in conditions of extremely low visibility?

We are studying pelicans-and cormorants- for decades now but we can’t say much about the mechanisms these birds use are to locate and catch fish in very turbid waters and of course at night. I...

23 July 2016 1,088 5 View

How does unusually cold weather influence hatching success of birds?

The thresholds below which there will be impact of cold weather upon the hatching success of birds is not clear to me. what is also not clear to me and I cannot locate relevant literature is the...

25 July 2015 3,049 8 View

Can anyone suggest literature on raised-field agriculture in Europe?

Raised-field agriculture or raised field cultivation systems are met in very few places in Greece but so far no one has seriously searched this subject (from all points if view). I know that there...

02 December 2014 4,902 3 View

Would someone propose a reference for the arrival-departure count method for estimating numbers of nests in colonies that cannot be seen or accessed?

This is a method I am applying for years to estimate numbers of nests in mixed heron colonies in reedbeds that I cannot see their contents. Although I am applying practical, common logic methods...

25 June 2014 1,993 8 View