Results 41 to 50 of about 18,201 (231)

Can aggregate quarry silt lagoons provide resources for wading birds? [PDF]

open access: yes, 2017
Wading birds have declined across Europe as the intensification of lowland agriculture has resulted in the loss and degradation of wetland areas. Lowland aggregate extraction sites that incorporate areas of fine, waste sediments deposited in silt lagoons
Day, George   +3 more
core   +2 more sources

Diet of juvenile skipjack herring Alosa chrysochloris: Ontogenetic shifts, predator–prey size ratios and mouth gape allometry

open access: yesJournal of Fish Biology, EarlyView.
Abstract The skipjack herring Alosa chrysochloris inhabits Gulf of Mexico drainages, primarily the Mississippi River Basin, and estuarine environments in the Gulf of Mexico. The trophic ecology of the skipjack herring is poorly understood, therefore we quantified the length, mouth gape and gut contents of juvenile skipjack herring from the Mississippi ...
Joshua P. Egan   +8 more
wiley   +1 more source

Cladocera species composition in lakes in the area of the Hornsund Fjord (Southern Spitsbergen) – preliminary results

open access: yesKnowledge and Management of Aquatic Ecosystems, 2011
Species composition of benthic and planktonic Cladocera was analysed in four lakes and ponds located in the southern part of the Spitsbergen Island near the Fjord Hornsund.
Zawisza E., Szeroczyńska K.
doaj   +1 more source

Polyphemus pediculus (L.) (Cladocera) as a possible indicator of water quality [PDF]

open access: yes, 1980
Usually stenobiotic species are used as hydrobiological indicators of the degree of pollution in natural waters. Cladocera are eurybiotic organisms, therefore their role as specific indicators of the water quality is considered to be insignificant ...
Butorina, L.G.
core  

Impact of Feeding Strategies on Trophic Dynamics, Growth Performance and Sustainability of Nile Tilapia in Semi‐Intensive Aquaculture Systems

open access: yesAquaculture, Fish and Fisheries, Volume 6, Issue 2, April 2026.
ABSTRACT Feed costs and limited knowledge of feeding strategies are a major constraint to the sustainability of semi‐intensive Nile tilapia aquaculture systems in sub‐Saharan Africa. In semi‐intensive systems, Nile tilapia (Oreochromis niloticus) utilizes natural pond production and supplemental feed, but their relative contributions to growth remain ...
Safina Musa   +6 more
wiley   +1 more source

Epizooic Diatoms on the Cerci of Ephemeroptera (Caenidae) Naiads [PDF]

open access: yes, 2018
Using scanning electron microscopy, epizooic diatoms were observed growing on the cerci of Caenis amica Hagen naiads (Ephemeroptera, Caenidae). Meridion circulare (Greville) C.
Wujek, Daniel E
core   +3 more sources

A Systematic Review of Biofloc Technology and Periphyton in Giant Freshwater Prawn (Macrobrachium rosenbergii) Aquaculture

open access: yesAquaculture, Fish and Fisheries, Volume 6, Issue 2, April 2026.
Biofloc technology and periphyton‐based systems enhance the sustainable production of giant freshwater prawn (Macrobrachium rosenbergii). A PRISMA‐guided review (2005 – 2024) shows that BFT improves survival (75 – 78 %) and feed efficiency, while periphyton supports natural productivity in grow‐out.
Md. Abdul Halim   +7 more
wiley   +1 more source

Distribution and Biomass of the Cladocera in the Western Basin of the Anzali Lagoon (Abkenar)

open access: yes‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 1998
The biomass of Cladocera (Crustacea, Arthropods) and their distribution pattern in the western part of Anzali Lagoon were investigated during a one year study program in 1994. From each of the allocated sampling sites, 5 subsamples were collected using a
M. Fallahi
doaj  

Zooplankton community responses to the mixture of imazethapyr with imazapic and bispyribac-sodium herbicides under rice paddy water conditions

open access: yesCiência Rural, 2014
The aim of this study was to assess the effect of concentrations of imazethapyr, imazapic, and bispyribac-sodium herbicides on zooplankton community (Cladocer, Copepod and Rotifer) in rice paddy fields. The decrease of half-life dissipation (DT50) of the
Geovane Boschmann Reimche   +6 more
doaj   +1 more source

Strategic ecosystem studies of large slow flowing lowland rivers. Progress report: April - October 1989 [PDF]

open access: yes, 1989
This report covers the period April to September, 1989. During this period sampling of invertebrates has concentrated on planktonic animals and those associated with one of the dominant macrophytes in the system, Nuphar lutea, the yellow water lily ...
Bass, J.A.B., Pinder, L.C.V.
core   +1 more source

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