The traditional conception in Chile of the toxic effect of metals on cultured fish tends to weigh heavily on incoming freshwater in open flow fish farms as the major responsible for mortality in early stages of development in salmon species. This approach is mainly based on two conditions that refer to freshwater quality in Chile, and to the dilutive effect of recirculation fish stocks when a peak of metals appears. For some years, the focus of attention on metal toxicity and the explanation of mortalities was...
Pond Deicing Can Help Prevent Fish Kill
Keeping the pond open will help keep oxygen in the water, attract water fowl and help prevent fish kills in the spring.
The most common cause of fish kills is suffocation due to lack of dissolved oxygen. Most dissolved oxygen is produced by algae and aquatic plants through photosynthesis. A lesser but also important source of oxygen in water is diffusion from the atmosphere, which is enhanced by wind-induced surface water turbulence. (Sallenave NMSU.edu)
During the...
Overview:
Pacific Reef Fisheries (PRF) has been a valued Aeration Industries International (AII) client dating back to 2003. John Moloney, General Manager of PRF and Vice President of the Australian Prawn Farmers Association, has been with PRF since 1994 and is dedicated to the sustainable growth of aquaculture.
PRF has been in the prawn business since 1994 and was granted approval in 2016 to expand their farm by 259 hectares. PRF depended on consistent, low maintenance aeration to ensure the healthy growth of...
Inland fish play critical roles in North American ecosystems and economics: In the U.S. alone in 2011, freshwater anglers spent more than $30 billion on their hobby, generating $73 billion in economic output. And fish help keep nature in balance as they feed on aquatic plants and animals and in turn provide sustenance to iconic species such as eagles, bears and osprey.
It’s no surprise, then, that as climate changes, 30 experts gathered last year in Bozeman, Montana, to explore implications for the well-bein...
Lake Malawi is the third largest lake in Africa and plays an important role in water supply, hydropower generation, agriculture and fisheries in the region. Lake level observations started in the 1890s and anecdotal evidence of variations dates back to the early 1800s. A chronology of lake level and outflow variations is presented together with updated estimates for the net inflow to the lake. The inflow series and selected rainfall records were also analysed using an unobserved component approach and, although...
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