Results 111 to 120 of about 98,652 (303)

The Effects of Nutrient Additions on Kokanee in Dworshak Reservoir, Idaho

Fisheries Management and Ecology, EarlyView.
ABSTRACT We investigated the effects of whole reservoir nitrogen (N) addition on kokanee growth in Dworshak Reservoir, Idaho. We hypothesized that N addition would improve the growth of kokanee (Oncorhynchus nerka) at a given level of abundance by increasing the availability of Daphnia, an important food source.
Sean M. Wilson, Matthew P. Corsi, Eric J. Stark, Eli A. Felts, Andrew M. Dux, Ryan S. Hardy   +5 more
wiley   +1 more source

Lumpy species coexistence arises robustly in fluctuating resource environments [PDF]

, 2017
The effect of life-history traits on resource competition outcomes is well understood in the context of a constant resource supply. However, almost all natural systems are subject to fluctuations of resources driven by cyclical processes such as ...
Mancy, Rebecca, Roelke, Daniel L., Sakavara, Athanasia, Spatharis, Sofie, Tsirtsis, George   +4 more
core   +2 more sources

Vertical Habitat Use by Japanese Jack Mackerel Trachurus japonicus Inferred From a Biologging Study in Tokyo Bay

Fisheries Oceanography, EarlyView.
ABSTRACT The movement ecology of Trachurus japonicus in the adult stage remains poorly understood because observing their underwater behavior over long periods is challenging. This study aimed to examine vertical habitat use by T. japonicus using electronic tags. Ninety fish were tagged and released in November 2022 in Tokyo Bay, Japan.
Junji Kinoshita, Yuki Fujinami, Junichi Imoto, Tohya Yasuda   +3 more
wiley   +1 more source

Increased anoxia following species invasion of a eutrophic lake

Limnology and Oceanography Letters
Species invasions can disrupt aquatic ecosystems by re‐wiring food webs. A trophic cascade triggered by the invasion of the predatory zooplankter spiny water flea (Bythotrephes cederströmii) resulted in increased phytoplankton due to decreased ...
Robin R. Rohwer, Robert Ladwig, Paul C. Hanson, Jake R. Walsh, M. Jake Vander Zanden, Hilary A. Dugan   +5 more
doaj   +1 more source

Using the Diet Composition of Adult Chinook Salmon to Understand the Regional Structure of Salish Sea Forage Communities

Fisheries Oceanography, EarlyView.
ABSTRACT Small pelagic fish and other forage species are patchily distributed over space and time, resulting in variable foraging conditions experienced by their predators. The high‐resolution data necessary to understand the spatiotemporal structure of forage communities are challenging to collect with expensive fishery‐independent surveys, meaning ...
Wesley L. Greentree, William D. P. Duguid, Micah J. Quindazzi, Bridget Maher, Francis Juanes   +4 more
wiley   +1 more source

Stage‐Specific Indicators of Northern Yellowtail Rockfish (Sebastes flavidus) Recruitment in the California Current Ecosystem

Fisheries Oceanography, EarlyView.
ABSTRACT Oceanographic and ecological conditions can be used to inform forecasts and decision‐making for marine resources, but the dominant drivers of recruitment variability remain poorly understood for many fish stocks. We developed a conceptual life‐history model of the oceanographic and ecological variables that influence the recruitment of ...
Megan L. Feddern, Amanda Darby, Kiva Oken, Nick Tolimieri   +3 more
wiley   +1 more source

Phytoplankton Diversity as Ecological Indicator in Jimbaran Bay Waters [PDF]

, 2014
A study was carried out to evaluate the ecological condition in Jimbaran Bay Waters by using Phytoplankton Diversity Index. The study was conducted at Balangan, Pemuda, Jimbaran, Kedonganan, Kelan and Segara Beach located in Jimbaran Bay. Shannon-Wiener
Perwira, I. Y. (Ima), Ulinuha, D. (Devi)
core  

[Phytoplankton community in a recreational fishing lake, Brazil].

Revista de saude publica, 2004
OBJETIVO: A avaliação da qualidade da água e da comunidade fitoplanctônica em ambientes destinados à recreação permite estabelecer formas de manejo desses sistemas, evitando possíveis problemas à saúde humana. Assim, realizou-se estudo com objetivo de analisar a variação sazonal do fitoplâncton de um sistema lacustre natural, e sua relação com a ...
Matsuzaki, Mayla, Mucci, José Luiz Negrão, Rocha, Aristides Almeida   +2 more
openaire   +3 more sources

Effects of Dissolved Oxygen and Hypoxia on Catch Rates of Nearshore Groundfishes in a Recreational Hook and Line Fishery

Fisheries Oceanography, EarlyView.
ABSTRACT Global climate change is intensifying ocean deoxygenation, particularly in eastern boundary current systems such as the California Current. This study investigates the impact of hypoxic events on a nearshore, multispecies recreational groundfish fishery along the Oregon coast.
Leif K. Rasmuson, Alison D. Whitman, Brandy T. Cervantes, Jonathan P. Fram   +3 more
wiley   +1 more source

Phytoplankton community and limnology of Chatla floodplain wetland of Barak valley, Assam, North-East India

Knowledge and Management of Aquatic Ecosystems, 2013
Phytoplankton diversity was investigated over a period of two years (2006 to 2008) in Chatla floodplain wetland in Barak valley, Assam, North-East India.
Sultana Laskar H., Gupta S.
doaj   +1 more source