scholarly journals Fishermen’s knowledge and conservation attitudes: focus on the great cormorant Phalacrocorax carbo (Linnaeus, 1758) in the Minho River, Portugal

2022 ◽  
Author(s):  
Beatriz Vieite ◽  
Heitor O. Braga ◽  
Eraldo M. Costa Neto ◽  
Ulisses M. Azeiteiro
Keyword(s):  
Great Cormorant ◽  
Phalacrocorax Carbo ◽  
Conservation Attitudes ◽  
Minho River

Morphological and genetic characterisation of Sarcocystis halieti from the great cormorant (Phalacrocorax carbo)

2018 ◽  
Vol 117 (11) ◽  
pp. 3663-3667 ◽  
Author(s):  
Petras Prakas ◽  
Dalius Butkauskas ◽  
Saulius Švažas ◽  
Vitas Stanevičius
Keyword(s):  
Great Cormorant ◽  
Phalacrocorax Carbo ◽  
Genetic Characterisation

scholarly journals Nesting of Great Cormorants (Phalacrocorax carbo) on man-made structures in Ukraine

2016 ◽  
Vol 24 (2) ◽  
Author(s):  
A. I. Sidorenko ◽  
V. D. Siokhin
Keyword(s):  
National Level ◽  
Field Work ◽  
Current Data ◽  
Great Cormorant ◽  
Phalacrocorax Carbo ◽  
Breeding Sites ◽  
Breeding Territory ◽  
Wide Range ◽  
Maintenance Work ◽  
Great Cormorants

In Ukraine the Great Cormorant (Phalacrocorax carbo Linnaeus, 1758) uses a rather wide range of habitats for nesting: islands, trees and shrubs, reedbeds and a variety of man-made structures. In general, the strategy of nesting on man-made structures is uncommon both in Ukraine and Europe, and Cormorantsdo this only in the absence of other sites suitable for nesting. Special research onCormorant colonies on technogenic constructions was carried out during the field expeditions by the Research Institute of Biodiversity of Terrestrial and Aquatic Ecosystems of Ukraine in 2002–2003 and 2012–2016. Besides this, we used retrospective and current data from the literature and Internet resources. Most of the field work was carried out by making surveys by boat and on foot. As a result, we found 8 Cormorant colonies on technogenic constructions in Ukraine: gas platforms in the Sea of Azov (near the village Strilkove, Henichesk district of Kherson region); sunken ships – targets for bombing training near the Arabat Spit (these are also known as «ship islands»); electricity pylons of the high-voltage Enerhodar Dnipro Power Line where it crosses the Kakhovka Reservoir; the dock in Yahorlyk Bayk, used in the past as a target for bombing training bombing; artificial island-platforms on Lake Chernine (Kinburn Peninsula); an artificial island on the Sasyk Lagoon (Odessa region); artificial islands, made as navigation markers on the Kremenchuk and Kiev reservoirs. The study found that in most cases the accompanying species was the CaspianGull (Larus cachinnans Pallas, 1811), which actively destroys the Cormorants’ nests and eats their eggs and chicks. The number of nests in the colonies varied greatly (5–30 nests on the navigation marker islands and ca. 2 000–2 300 on the «ship-islands» and gas platforms). This is due, primarily, to the area of the breeding territory. The research found that fierce territorial competition was observed in most of the colonies both with Caspian Gulls and between Cormorants. In addition, we observed anthropogenic interference in the colonies by fishermen and workers conducting routine maintenance work (as happened in the case of electricity pylons and gas platforms). The benefit of this study is that it is the first research in Ukraine conducted at national level onthis type of nesting by Cormorants. Moreover, the study examines the history of emergence of these nesting territories and population dynamics of the Great Cormorant from the time of initial settlement of the breeding sites till the present.

scholarly journals Flock-fishing deep-diving piscivores (Great Crested Grebe Podiceps cristatus, Great Cormorant Phalacrocorax carbo, Common Merganser Mergus merganser) at Lake Vombsjön, southern Sweden, and those that exploit them

Ornis Svecica ◽  
2018 ◽  
Vol 28 (1) ◽  
Author(s):  
Hans Källander
Keyword(s):  
Great Cormorant ◽  
Southern Sweden ◽  
Phalacrocorax Carbo ◽  
Herring Gulls ◽  
Deep Diving ◽  
Large Numbers ◽  
Ardea Cinerea ◽  
Mergus Merganser ◽  
Podiceps Cristatus ◽  
Great Cormorants

Lake Vombsjön in southern Sweden is visited by large numbers of Great Crested Grebes Podiceps cristatus (>2000), Great Cormorants Phalacrocorax carbo (sometimes >1000) and Common Mergansers Mergus merganser (up to 2000) in late autumn and early winter. Different species exploit them. Great Crested Grebes are used especially by commensal Common Gulls Larus canus; the gulls take advantage of fish that flee towards the surface. Common Gulls also use cormorants and mergansers in the same way but also try to kleptoparasitize them. Both Herring Gulls Larus argentatus and Great Black-backed Gulls Larus marinus kleptoparasitize these two species, while Red Kites Milvus milvus, Grey Herons Ardea cinerea and Carrion Crows Corvus corone use them commensally. White-tailed Eagles Haliaeetus albicilla seem to use both methods to obtain fish. On 50% of one hundred visits during November to March, eagles were seen flying low over the fishing flocks. They would fly a metre or so above the flocks and then accelerate and attack a bird holding a fish. The bird would then either try to escape by a rush or by diving, dropping the fish which the eagle seized. Interestingly, the flock-fishing birds showed no fear reactions towards the eagles but appeared to regard them similarly to large gulls.

scholarly journals Great cormorant (Phalacrocorax carbo) predation on pikeperch (Sander lucioperca L.) in shallow eutrophic lakes in Poland

2017 ◽  
Vol 25 (2) ◽  
pp. 123-130 ◽  
Author(s):  
Piotr Traczuk ◽  
Andrzej Kapusta
Keyword(s):  
Length Distribution ◽  
Bird Species ◽  
Fish Populations ◽  
Great Cormorant ◽  
Phalacrocorax Carbo ◽  
Sander Lucioperca ◽  
Eutrophic Lakes ◽  
Breeding Colony ◽  
Great Cormorants

AbstractIncreases in the population abundance of the piscivorous great cormorant (Phalacrocorax carbo) has led to conflicts with fisheries. Cormorants are blamed for decreased fish catches in many lakes in Poland. The aim of this paper is to describe to role of pikeperch (Sander lucioperca) in the diet of cormorants nesting in a colony on the island in Lake Warnołty. Since the breeding colony is located in the vicinity of Lake OEniardwy, the largest lake in Poland, the cormorants use the resources in this lake. In 2009-2016, 18,432 regurgitated fish were collected, of which 593 were pikeperch. The share of pikeperch among fish collected in 2009-2012 did not exceed 2%, but from 2013 this increased substantially to maximum of 38.2% in 2015. The smallest pikeperch had a standard length of 8.4 cm, and the largest 42.5 cm. Pikeperch mean length differed by year, and the length distribution was close to normal. The sizes of the regurgitated pikeperch indicate that cormorants prey almost exclusively on juvenile specimens. The results of the present study indicate that cormorant predation has a significant impact on pikeperch populations in lakes in the vicinity of the colony, and the great cormorants are possibly a significant factor in the effectiveness of pikeperch management. When planning for the management of fish populations in lakes subjected to cormorant predation pressure, it should be borne in mind that predation by this piscivorous bird species impacts the abundance and size-age structure of fish populations.

scholarly journals The Digenean Clinostomum complanatum Found from Great Cormorant Phalacrocorax carbo in Japan

2018 ◽  
Vol 53 (4) ◽  
pp. 132-135 ◽  
Author(s):  
Takashi Iwaki ◽  
Tsukasa Waki ◽  
Jumpei Arakawa ◽  
Kazuo Ogawa
Keyword(s):  
Great Cormorant ◽  
Phalacrocorax Carbo ◽  
Clinostomum Complanatum

New species of quill mites (Acari, Cheyletoidea, Syringophilidae) and the first record of male for the genus Stibarokris

Zootaxa ◽  
2011 ◽  
Vol 2817 (1) ◽  
pp. 63 ◽  
Author(s):  
ELIZA GLOWSKA ◽  
MACIEJ SKORACKI
Keyword(s):  
New Species ◽  
First Record ◽  
Mite Species ◽  
Great Cormorant ◽  
Phalacrocorax Carbo ◽  
New Host ◽  
Quill Mites ◽  
American Flamingo ◽  
Phoenicopterus Ruber

In this paper we describe a new quill mite species Stibarokris dastychi sp. nov., parasitizing Great Cormorant Phalacrocorax carbo (Linnaeus) (Pelecaniformes: Phalacrocoracidae) and the male of S. phoeniconaias Skoracki et OConnor, 2010 from American Flamingo Phoenicopterus ruber Linnaeus (new host). Additionally, the improved (including both female and male) diagnosis of the genus Stibarokris Kethley, 1970 and the key to all known species of this genus are given.

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