Results 21 to 30 of about 520 (169)

Long‐term monitoring of pikeperch (Sander lucioperca) populations under increasing temperatures and predator abundances in the Finnish coastal waters of the Baltic Sea

Ecology of Freshwater Fish, Volume 32, Issue 4, Page 750-764, October 2023., 2023
Abstract The Baltic Sea has been under intense environmental changes in the recent decades, such as climate change, eutrophication and increasing abundance of top‐predators, which pose serious challenges to its aquatic life. For informed conservation measures and sustainable yields, we need to understand how the populations are being affected ...
Mikko Olin, Outi Heikinheimo, Topi K. Lehtonen, Jari Raitaniemi   +3 more
wiley   +1 more source

Impacts of predation by Eurasian otters on Atlantic salmon in two Norwegian rivers

Freshwater Biology, Volume 68, Issue 7, Page 1176-1193, July 2023., 2023
Abstract The return of the Eurasian otter (Lutra lutra) to western Norway has sparked human–predator conflicts because otters prey on vulnerable Atlantic salmon (Salmo salar) populations. Although predation may not be the ultimate cause of salmon population declines, otters that kill adult salmon in rivers before they spawn impact the salmon spawning ...
Lene Klubben Sortland, Robert J. Lennox, Gaute Velle, Knut Wiik Vollset, Marius Kambestad   +4 more
wiley   +1 more source

Great cormorant (Phalacrocorax carbo sinensis) predation on adult anadromous brown trout (Salmo trutta)

Ecology of Freshwater Fish, Volume 32, Issue 2, Page 488-495, April 2023., 2023
Abstract The increase in abundance of great cormorants (Phalacrocorax carbo sinensis) over the last decades has caused concern for the sustainability of fish populations. Cormorants are opportunistic piscivorous birds that eat fish from a wide range of species and sizes, in marine, lacustrine and riverine habitats.
Kristi Källo, Kim Birnie‐Gauvin, Niels Jepsen, Kim Aarestrup   +3 more
wiley   +1 more source

Investigating the behaviour of Atlantic salmon (Salmo salar L.) post‐smolts during their early marine migration through the Clyde Marine Region

Journal of Fish Biology, Volume 101, Issue 5, Page 1285-1300, November 2022., 2022
Abstract It is thought that survival during migration is particularly poor for Atlantic salmon post‐smolts immediately after entry into sea and particularly in the estuarine environment. Nonetheless, there is currently a lack of information on Atlantic salmon post‐smolt movement behaviour in estuaries in the UK.
Jessie Lilly, Hannele M. Honkanen, David M. Bailey, Colin W. Bean, Ruaidhri Forrester, Jessica R. Rodger, Colin E. Adams   +6 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

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

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

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