scholarly journals The Limit to the Density of Species (A Reflection on Human Intervention in Conservation and Its Effects)

2021 ◽  
Author(s):  
Luis Fernando Basanta Reyes ◽  
Manuel Calderón Carrasco ◽  
Ángel Rodríguez Martín
Keyword(s):  
A Priori ◽  
Annual Number ◽  
Irreversible Damage ◽  
Gyps Fulvus ◽  
Circus Pygargus ◽  
Domestic Livestock ◽  
Ciconia Nigra ◽  
Black Stork ◽  
Disproportionate Number ◽  
Aquila Fasciata

Human actions on the natural environment cannot always be considered as impacts resulting from their behavior to survive. Many of these activities have caused irreversible damage and changes in the landscape, flora, and fauna. By contrast, several actions, carried out “a priori” with the best intention, to help in the conservation of species considered in danger, have caused a dangerous decompensation. Aid for the recovery of some species of birds has led to their overpopulation. The artificial contributions of food, always in the same places, have caused an excessive increase in the number of griffon vultures (Gyps fulvus), which has produced the reduction of other endangered species, such as the black stork (Ciconia nigra) and the Bonelli’s eagle (Aquila fasciata), which have been displaced from the rocks in which they nested due to the harassment of a greater number of vultures. Besides, vultures are attacking domestic livestock at the most defenseless times, such as during calving. Greater flamingo (Phoenicopterus roseus) has become out of control in numbers in Europe. The two classic breeding areas, La Camargue (France) and La Laguna de Fuente de Piedra (Spain) have produced an enormous annual number of individuals that are distributed among the few lagoons of Mediterranean Europe. The wetlands are devastated by the flamingo, which removes the mud and prevents sunlight from reaching the underwater vegetation, turning these lagoons into dead water, having to be abandoned (temporarily) by most aquatic species, including the flamingo. The shortage of food resources of natural origin, for such a disproportionate number, has caused the flamingo to invade the rice fields, accepting its grain as a substitute for the invertebrates that it habitually consumed, and which are now scarce. The same is the case with the white stork (Ciconia ciconia) in southern Europe. The increase in their population has reduced the number of reptiles and amphibians, bringing several of their species to the brink of extinction. Storks have varied their prey spectrum, consuming carrion, and preying on Montagu’s harrier (Circus pygargus) brood. In these cases, and many others, the theory of “the more the better” is not valid. If we want to make the protection of some species compatible with the conservation of others, it seems necessary to redirect some situations …

scholarly journals Occurrence of Neophilopterus tricolor (Burmeister, 1838) on a black stork (Ciconia nigra) in the Kızılırmak Delta, Turkey

2020 ◽  
Author(s):  
Mustafa AÇICI ◽  
Gökhan EREN ◽  
Ömral Ünsal ÖZKOÇ ◽  
Mehmet ÖZTÜRK ◽  
Cenk Soner BÖLÜKBAŞ
Keyword(s):  
Ciconia Nigra ◽  
Black Stork

First report of one ecto- and two endoparasite species of the black stork (Ciconia nigra) in Portugal

2019 ◽  
Author(s):  
David W. Ramilo ◽  
Inês Caetano ◽  
Erica Brazio ◽  
Manuela Mira ◽  
Leonor Antunes ◽  
...  
Keyword(s):  
Endangered Species ◽  
Parasite Species ◽  
Post Mortem ◽  
Western Palearctic ◽  
Palearctic Region ◽  
Ciconia Nigra ◽  
Black Stork ◽  
Southern Portugal ◽  
Electric Cables ◽  
First Time

Abstract BackgroundThe black stork (Ciconia nigra Linnaeus, 1758) is a recognized endangered species in Europe and most of the specimens from the Western Palearctic region breed in the Iberian Peninsula. Available works regarding parasites in black storks are scarce.MethodsA black stork was captured in southern Portugal after colliding against electric cables. The specimen did not resist to injuries and a post-mortem exam was performed. During the procedure, several ecto- and endoparasites were found.ResultsThe collected parasites were lice (Neophilopterus tricolor), nematodes (Desportesius sagittatus) and trematodes (Cathaemasia hians).ConclusionsThree different parasite species are reported for the first time in a black stork from Portugal.

Management-related problems of floodplain habitats for the Black stork (Ciconia nigra).

Large Rivers ◽  
2003 ◽  
Vol 15 (1-4) ◽  
pp. 483-490
Author(s):  
Eniko A. Tamas ◽  
Bela Kalocsa
Keyword(s):  
Ciconia Nigra ◽  
Black Stork ◽  
Floodplain Habitats

scholarly journals Breeding population of Black Stork, Ciconia nigra, in Italy between 1994 and 2016

2018 ◽  
Vol 88 (1) ◽  
pp. 15-22 ◽  
Author(s):  
Maurizio Fraissinet ◽  
Lucio Bordignon ◽  
Massimo Brunelli ◽  
Matteo Caldarella ◽  
Enzo Cripezzi ◽  
...  
Keyword(s):  
Population Density ◽  
Breeding Population ◽  
Breeding Period ◽  
High Increase ◽  
Nesting Sites ◽  
Central Regions ◽  
Southern Central ◽  
Ciconia Nigra ◽  
Black Stork ◽  
Piedmont Region

The Black Stork Ciconia nigra, following an expansion on European scale, started breeding in Italy in 1994 with one pair in the Piedmont Region and one in the Calabria Region. Since then, the breeding pairs established in Italy have progressively increased up to 18 in 2016, and they are currently in Piedmont, Lazio, Campania, Molise, Apulia, Basilicata and Calabria. However, the number of breeding pairs could be higher than 20, as indicated by records and observations of adults and juveniles, during the breeding period in potentially suitable nesting areas. Despite the low population density in Italy, the trend in the breeding population in Northwest and in Southern Central regions seems to show a slight and high increase respectively. Productivity, breeding success and fledging rate have been considered and analysed. A difference between the two macro areas has been found in the choice of nesting sites, which is on trees for Northwest couples, and cliffs for Southern Central couples. It is necessary to further explore the reason why the small Northwest population does not show any increase and range expansion compared to the Southern Central one.

scholarly journals Rezultati januarskega štetja vodnih ptic leta 2014 v Sloveniji / Results of the January 2014 waterbird census in Slovenia

Acrocephalus ◽  
2014 ◽  
Vol 35 (160-161) ◽  
pp. 73-83
Author(s):  
Luka Božič
Keyword(s):  
Muscovy Duck ◽  
Phalacrocorax Carbo ◽  
Tufted Duck ◽  
Bubulcus Ibis ◽  
Cygnus Olor ◽  
Fulica Atra ◽  
Coastal Sea ◽  
Ciconia Nigra ◽  
Black Stork ◽  
Standing Waters

Summary In 2014, the International Waterbird Census (IWC) was carried out in Slovenia on 18 and 19 Jan. Waterbirds were counted on all larger rivers, along the entire Slovenian Coastland and on most of the major standing waters in the country. During the census, in which 268 observers took part, 413 sections of the rivers and coastal sea with a total length of 1395.1 km and 226 other localities (178 standing waters and 48 streams) were surveyed. Altogether, 45,346 waterbirds of 62 species were counted. This is the lowest number of waterbirds recorded after the 1997 and 1998 censuses. The greatest numbers of waterbirds were counted in the Drava count area, i.e. 20,217 individuals (44.6% of all waterbirds in Slovenia). By far the most numerous species was Mallard Anas platyrhynchos (43.0% of all waterbirds), followed by Black-headed Gull Chroicocephalus ridibundus (10.1% of all waterbirds), Coot Fulica atra (7.9% of all waterbirds), Yellow-legged Gull Larus michahellis (6.0% of all waterbirds) and Cormorant Phalacrocorax carbo (4.6% of all waterbirds). The number of 1,000 counted individuals was also surpassed by Mute Swan Cygnus olor, Pochard Aythya ferina, Tufted Duck Ay. fuligula and Teal An. crecca. Among the rarer recorded species, the Black Stork Ciconia nigra (registered for the first time during the January Waterbird Censuses; only the second winter record in Slovenia), Cattle Egret Bubulcus ibis and Flamingo Phoenicopterus roseus (both registered only for the second time during the IWC) should be given a special mention. Numbers of the following species were the highest so far recorded during the IWC: Shelduck Tadorna tadorna, Muscovy Duck Cairina moschata, Shoveler An. clypeata, Redthroated Loon Gavia stellata and Pygmy Cormorant Phalacrocorax pygmeus. Also, the total number of C and E category species/taxa was the highest to date, although still quite low with 70 individuals. Numbers of the following species were the lowest so far recorded during the IWC: Cormorant, Little Grebe Tachybaptus ruficollis and Green Sandpiper Tringa ochropus

scholarly journals Status of Black Stork Ciconia nigra in Lesotho

2016 ◽  
Vol 23 (2) ◽  
pp. 212-214
Author(s):  
Grzegorz Kopij
Keyword(s):  
Ciconia Nigra ◽  
Black Stork

scholarly journals Detection of forest loss on Black Stork (Ciconia nigra L.) breeding sites in the Rivne region (Polissia) by a GIS analysis

2017 ◽  
pp. 75-80
Author(s):  
Strus Iu. ◽  
Bokotey A. ◽  
Dzubenko N.
Keyword(s):  
Breeding Population ◽  
Forest Area ◽  
Forest Loss ◽  
Gis Analysis ◽  
Breeding Sites ◽  
Forest Logging ◽  
Ciconia Nigra ◽  
Black Stork ◽  
Total Forest Area

The study aims to assess the scale of forest loss (mostly caused by logging) on breeding sites of the local Black Stork breeding population in the Rivne region of Ukraine, within the Polissia nature zone. The study is based on a GIS analysis of the Global Forest Watch data in intersection of circular buffers of different sizes around 141 Black Stork nests. Forest logging was detected on 38,3% of breeding sites in the region, in 100 m buffers around nests. On more than 14% of breeding territories (in 100 m buffers) forest loss exceeded 20% of the total forest area. Therefore, logging is one of the major threats for the local Black Stork population. The method used for the forest loss detection by a GIS analysis seems to be effective for the search of territories with the violation of protection regime for rare birds when resources are limited.

Longevity and survival of the black stork Ciconia nigra based on ring recoveries

Biologia ◽  
2011 ◽  
Vol 66 (5) ◽  
Author(s):  
Enikő Tamás
Keyword(s):  
Survival Rate ◽  
Survival Rates ◽  
Present Knowledge ◽  
First Year ◽  
Previous Knowledge ◽  
Significant Difference ◽  
Ring Recoveries ◽  
Ciconia Nigra ◽  
Black Stork

AbstractTo understand population dynamics, the determination of survival rates is very important. For the black stork Ciconia nigra no survival rate determination has been published to date. This might be due to the fact that ringing activity and recovery numbers in general are still relatively low for the species. The international black stork colour ringing programme is taking place with the participation of 25 countries including Hungary. Altogether more than 7,000 black storks have been colour ringed worldwide, of which 1,069 individuals were marked in Hungary. This article’s objective is the determination of the survival rates for the black stork, as well as to estimate the longevity of the species based on live encounters of ringed individuals. The conclusions are that longevity can be estimated based on the data, and is in agreement with previous knowledge; and that the survival rate of the species, with our present knowledge, shows a significant difference between first year (0.1696, 0.1297–0.219) and older birds (0.838, 0.773–0.887).

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