Phosphorus (P) stores in gravel‐bed rivers are released for uptake by periphyton when pH levels exceed 8.5. The Tukituki River has low alkalinity water and frequently experiences periphyton blooms, and daytime pH > 9 during summer low‐flows. We measured dissolved reactive P (DRP) and EPC 0 , the water concentration of DRP at which no net release or sorption from the river bed occurs, in sediment samples from the Tukituki River...

Whitebait comprise a culturally, commercially and recreationally important fishery in New Zealand, where post‐larvae are netted while returning from their marine phase. In this study, we expanded an historical (1964) sampling programme to gain a contemporary understanding of the species composition of the whitebait fishery; 87 rivers were sampled over six months in 2015. Over the entire country, >12 species were found in sampl...

We test the paradigm that in a future warmer ocean, shallower winter mixing will lead to less net primary production (NPP), by investigating whether warming between 2002 and 2018 led to changes in NPP in the Tasman Sea/New Zealand region. The 2002–18 trend in sea surface temperature (SST) was positive over most of the region, and was driven by increasingly warmer summers and marine heat waves (MHWs) rather than year‐round warm...

Knowledge of trophic status is fundamental to understanding the condition and function of lake ecosystems. We developed regression models to predict chlorophyll a concentrations (chl a ) in New Zealand lakes for reference and current states, based on an existing dataset of total nitrogen (TN) and total phosphorus (TP) concentrations for 1031 lakes. Models were then developed to predict Secchi depth based on chl a and a sedimen...

Human settlement in Bay of Islands, New Zealand, beginning ∼1300 AD, wrought immense, conspicuous and enduring change to local shallow‐water marine ecologies, this review addressing those transformations attributable to increased rates of anthropogenically induced, land‐derived sedimentation. Elevated silt inflow, particularly after the late‐1800s, in course led to ∼130% expansion in mangrove ( Avicennia marina ) cover, with c...

Coastal benthic ecosystems may be impacted by numerous human activities, including aquaculture, which continues to expand rapidly. Indeed, today aquaculture worldwide provides more biomass for human consumption than do wild fisheries. This rapid development raises questions about the interactions the practice has with the surrounding environment. In order to design strategies of sustainable ecosystem exploitation and marine sp...

Clostridium butyricum is a bacterium of rod shape, strictly anaerobic, Gram‐positive and form spores. Short‐chain fatty acids, biofuel compounds and precursors of biomaterials (H 2 , butanol and 1,3‐propanediol) are produced by C. butyricum during the fermentation of carbohydrates and sugars. In humans and animals, although C. butyricum has been found to be associated with botulism in infant and necrotising enterocolitis in pr...

The health and welfare of farmed fish are often regarded with less concern than for other production animals. This review compares the Norwegian legal health and welfare frameworks for broiler chickens and farmed salmon, with the aim of improving regulations for salmon farming in Norway. Highlighting differences in laws, regulations and governmental organisation are also highly relevant in general, especially in developing wel...

The nutritional value of spirulina in aquafeeds has been studied extensively as a fishmeal replacer or as a functional feed additive to increase growth and health performance of fish in the last decade. Despite increased interest in spirulina research in aquaculture, its increased production cost still limits its use in commercial rations. Zarrouk’s medium is the standard substrate used for growing spirulina. Although this med...

Aquatic organisms are susceptible throughout their lives to chemical and physical stressors, which negatively affect their health. Various aquatic pollutants derived from industrial effluents, overuse of some agricultural pesticides, herbicides and insecticides may cause devastating toxicological aspects of aquatic organisms and deteriorate their health and growth. They also led to oxidative stress to fish due to the stimulati...

Aquaculture is an economic activity that faces the unavoidable problem of water quality detriment, which is mainly generated by the improper management of production ponds, including inadequate water circulation and aeration, accumulation of undigested food residues, excretion of metabolic by‐products by the cultivated organisms and other. In addition, the increase in suspended organic matter together with the presence and gen...

Plant‐based additives are currently used in aquaculture for their various beneficial properties. Curcumin and turmeric are usually applied for their interesting results on growth performance of fish. In this paper, the effect of dietary inclusion of curcumin and turmeric powder on growth performance in fish was studied. Twenty data sets from 5 studies and 29 data sets from 8 publications were respectively computed for curcumin...

This paper analyses the acceptance of aquaculture compared with fisheries in the province of Cadiz (Spain), in the context of social carrying capacity, the point at which its presence begins to be excessive and leads to significant problems for society. Researchers conducted 558 face‐to‐face surveys to study the societal acceptance of this sector in several dimensions (social, economy, quality, environment, etc.). We have also...

Vibrio species is a common natural inhabitant of brackish and saltwater. Vibrio sp. includes not only emerging pathogens but also well‐known and emerged pathogens, such as V. cholerae , V. parahaemolyticus and V. vulnificus . Although it is often harmless, pathogenic strains which could cause serious food‐borne illnesses/outbreaks in both humans and animals have been identified. Vibrio infection is usually self‐limiting and re...

The global production of cultured crustaceans for 2018 is predicted to be ~8.63 million tonnes, and shrimp represents a significant portion of cultured crustaceans. Demands for shrimp are raising, also in developing countries as consumer preferences have evolved with rising incomes. Shrimp is mainly produced for consumption but during processing economically valuable products are being generated such as chitosan, which is used...

The motivation behind this article is to give point‐by‐point data about the beneficial applications of oregano feed supplement in fish diets as immunomodulators, antioxidant, antiviral, antifungal and antiparasitic. Use of this plant as feed additive plays an important role in the fish diet when compared to other synthetic feed additives. Oregano is rich in phytochemical compounds including carvacrol and thymol in addition to...

Modern ornamental fishkeeping is one of the most popular hobbies in the world, with various known positive and also negative aspects including the introduction of non‐native species. Despite this fact, the history of the first imports of freshwater tropical fish species for ornamental purposes has never been deeply studied and is usually simplified. Here, we present the first comprehensive review of reported imports in the per...

The innate immune system is the first‐line defence against invading pathogens, and the main molecules involved in recognizing invading pathogens are the pattern recognition receptors. Accumulating evidences have demonstrated that activation and termination of the immune responses are regulated by various layers of regulators and mechanisms. MicroRNAs (miRNAs) are a group of small non‐coding RNAs that emerged as critical compon...

Skin wounds and injuries are frequently occurring in farmed fish, particularly in more intensive production systems. Any disruptions of the skin, such as mucus removal, scale loss or deeper incisions, are negatively correlated with barrier functions and disease resistance. In this review, the current knowledge on mechanically induced wounds in fish is dedicated to five areas of focus: (i) The anatomy and functions of fish skin...

Gill disease of farmed Atlantic salmon ( Salmo salar ) in the marine environment has emerged as a significant problem for the salmon aquaculture industry. Different types of marine salmon gill disease reported include amoebic gill disease (AGD), parasitic gill disease, viral gill disease, bacterial gill disease, zooplankton (cnidarian nematocyst)‐associated gill disease, harmful algal gill disease and chemical/toxin‐associated...

Shrimp farming has been the fastest‐growing sector in seawater aquaculture and has contributed to improving the farmers income and the utilization efficiency of aquaculture resources in China. The shrimp industry has deployed ever‐improved and innovated methods, from extensive farming to semi‐intensive and intensive farming. Various high‐density intensive culture models, such as high‐land, greenhouse and indoor industrialized...

Farmed rohu, Labeo rohita , is an economically important freshwater aquaculture species in south Asia. Consumer preference for this species has driven researchers to develop genetically improved rohu (Jayanti) for important traits such as growth and disease resistance. The feeding and breeding biology of rohu is well‐studied, but the physiological responses to stress or climate change at the molecular level are less understood...