Results 21 to 30 of about 236 (139)

Size matters? Species‐ and size‐specific fish predation on recently established invasive quagga mussels Dreissena rostriformis bugensis Andrusov 1897 in a large, deep oligotrophic lake

Journal of Fish Biology, Volume 100, Issue 5, Page 1272-1282, May 2022., 2022
Abstract Since its first appearance in Lake Constance in 2016 the invasive quagga mussel Dreissena rostriformis bugensis has come to dominate the mussel community and now occurs in hyperabundant densities over the whole lake bottom. A lake‐wide field study was conducted between 2019 and 2020 to obtain a systematic insight into the importance of this ...
Jan Baer, Christina Spiessl, Alexander Brinker   +2 more
wiley   +1 more source

Survey of fish enemies from three fish farms in Iraq III. Impacts of predaceous water birds on cultivated fishes

المجلة العراقية للاستزراع المائي, 2022
The present investigation concerned with a thorough survey on the serious impact of the predaceous water birds from three selected fish farms in the country, namely Al- Manahel fish farm (presently called Al-Beilad) in Babylon province, Basrah University/
Sadek. A. Hussein, N. K. Salem, J. M. Abed   +2 more
doaj   +1 more source

Avian Diversity and Abundance of Taunsa Barrage Ramsar Site in Punjab, Pakistan

Journal of Zoological Systematics and Evolutionary Research, Volume 2022, Issue 1, 2022., 2022
The study of avian species diversity and abundance at the Taunsa Barrage Ramsar site was carried out from September 2019 to March 2020. Taunsa Barrage is an important wetland for international and local migratory birds, including waterfowls, waders, and long‐distance migrant avifauna.
Muhammad Zeshan Haider, Shakeel Ahmed, Nuzhat Sial, Gulnaz Afzal, Ayesha Riaz, Akhtar Rasool Asif, Tahir Mehmood, Abdul Rasheed, Sayyed Aun Muhammad, Hafiz Ishfaq Ahmad, Amjad Bashir   +10 more
wiley   +1 more source

The Human Dimensions of Recreational Anglers Targeting Freshwater Species in Coastal Ecosystems, with Implications for Management

North American Journal of Fisheries Management, Volume 41, Issue 5, Page 1572-1590, October 2021., 2021
Abstract Little is known about whether brackish coastal ecosystems attract specific angler types that are characterized by site‐specific preferences and behaviors while targeting freshwater fishes living in a low‐salinity environment. Using the lagoon (“Bodden”) fisheries in northeastern Germany, we compared the human dimensions among anglers fishing ...
Dieter Koemle, Ben Beardmore, Malte Dorow, Robert Arlinghaus   +3 more
wiley   +1 more source

Environmental DNA reveals the temporal and spatial extent of spawning migrations of European shad in a highly fragmented river basin

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 31, Issue 8, Page 2029-2040, August 2021., 2021
Abstract Artificial barriers on lowland rivers impede the spawning migrations of anadromous fishes, preventing access to historical spawning areas. In the cryptic European shads Alosa alosa and Alosa fallax (‘shad’ hereafter), this has resulted in population declines across their range. Conservation programmes aim to facilitate the passage of migrators
Caterina Maria Antognazza, J. Robert Britton, Vanessa De Santis, Konstantina Kolia, Ossi A. Turunen, Peter Davies, Laura Allen, Emilie A. Hardouin, Charles Crundwell, Demetra Andreou   +9 more
wiley   +1 more source

Vocal behaviour of the Great Cormorant Phalacrocorax carbo sinensis during the breeding season [PDF]

Bird Study, 2021
Capsule: Great Cormorants Phalacrocorax carbo sinensis use vocal communication during the breeding season, with males being particularly vocal earlier in the breeding cycle and showing individual variation in some calls, which could be used for individual recognition.
Saara Mäkelin, Magnus Wahlberg, Anna N. Osiecka, Claire Hermans, Thorsten J.S. Balsby   +4 more
openaire   +3 more sources

Skeletal elements of the penguin eye and their functional and phylogenetic implications (Aves: Sphenisciformes: Spheniscidae)

Journal of Morphology, Volume 282, Issue 6, Page 874-886, June 2021., 2021
Micro‐CT of the scleral ring of a Snares crested penguin (Eudyptes robustus) surrounding a gentoo penguin (Pygoscelis papua) skull. In penguins the scleral ring contains 10–17 overlapping ossicles, maintaining the shape of the eye and providing an attachment for the rectus muscles. Its position within the skull suggests a role in globe protection also.
Peter W. Hadden, Dane A. Gerneke, Charles N. J. McGhee, Jie Zhang   +3 more
wiley   +1 more source

Cormorant predation effects on fish populations: A global meta‐analysis

Fish and Fisheries, Volume 22, Issue 3, Page 605-622, May 2021., 2021
Abstract This paper provides the results from the first meta‐analysis to examine the impact of cormorant (Phalacrocoracidae) predation on fish. It is based on a systematic search of literature, covering studies using significance‐based hypotheses tests on the relation between fish parameters and cormorant abundance.
Maria K. Ovegård, Niels Jepsen, Mikaela Bergenius Nord, Erik Petersson   +3 more
wiley   +1 more source

Seabird guano fertilizes Baltic Sea littoral food webs. [PDF]

PLoS ONE, 2013
Nutrient enrichment in coastal marine systems can have profound impacts on trophic networks. In the Baltic Sea, the population of Great Cormorant (Phalacrocorax carbo sinensis) has increased nearly exponentially since the mid-1990 s, and colonies of ...
Karine Gagnon, Eva Rothäusler, Anneli Syrjänen, Maria Yli-Renko, Veijo Jormalainen   +4 more
doaj   +1 more source

Corneal power and underwater accommodation in great cormorants(Phalacrocorax carbo sinensis) [PDF]

Journal of Experimental Biology, 2003
SUMMARY In great cormorants (Phalacrocorax carbo sinensis), corneal refractive powers, determined by photokeratometry, ranged between 52.1 diopters (52.1 D) and 63.2 D. Photorefractive reflexes, determined by infrared video photorefraction, indicated that in voluntary dives the cormorants accommodate within 40-80 ms of submergence and ...
Gadi, Katzir, Howard C, Howland
openaire   +2 more sources