Results 91 to 100 of about 129,596 (319)

Expression of corticoid‐regulatory genes in the gills of Atlantic salmon (Salmo salar) parr and smolt and during salinity acclimation

Journal of Fish Biology, EarlyView.
Abstract In teleost fishes, cortisol is the major corticoid and has both glucocorticoid and mineralocorticoid actions. However, how fish tissues discriminate between these distinct corticosteroid actions is unclear. In mammals, the major factors responsible for intracellular corticosteroid regulation are glucocorticoid receptors (grs) and the ...
Makoto Kusakabe, Takashi Yada, Graham Young, Amy M. Regish, Stephen D. McCormick   +4 more
wiley   +1 more source

Pathology of tilapias

Aquatic Living Resources, 1989
The pathology of farmed tilapias is reviewed from presently available published data. The effects of intensive production systems on the aspects and importance of pathology are outlined. The main pathogenic organisms are recorded. For the moment, these pathogens seem to represent a potential threat, rather than being primary causes of losses ...
openaire   +3 more sources

A wild‐caught rosy barb Pethia conchonius in a British urban pond underscores the need to prevent aquarium releases

Journal of Fish Biology, EarlyView.
Abstract A specimen of rosy barb Pethia conchonius of 51 mm standard length, encountered in an urban pond in London, is reported. This small cyprinid is native to lakes and streams in subtropical regions of southern Asia and is commonly sold as an ornamental fish.
Peter J. Barry, Phil I. Davison, Luke Pearson, Gordon H. Copp   +3 more
wiley   +1 more source

Host genetic selection for cold tolerance shapes microbiome composition and modulates its response to temperature

eLife, 2018
The hologenome concept proposes that microbes and their host organism are an independent unit of selection. Motivated by this concept, we hypothesized that thermal acclimation in poikilothermic organisms, owing to their inability to maintain their body ...
Fotini Kokou, Goor Sasson, Tali Nitzan, Adi Doron-Faigenboim, Sheenan Harpaz, Avner Cnaani, Itzhak Mizrahi   +6 more
doaj   +1 more source

Comparison of some traits of economic importance in tilapias (Orechromis niloticus and Sarotherodon galilaeus) with particular reference to their culture in Ghana [PDF]

, 2005
This study was conducted to determine which of the two major tilapia species in freshwater capture fisheries in Ghana, Oreochromis niloticus or Sarotherodon galilaeus, is more suitable for breed improvement and pond culture.
Attipoe, F.Y.K., Owusu-Frimpong, M., Padi, J.N.   +2 more
core  

The key mechanisms associated with the survival of Gulf toadfish, Opsanus beta, when in severe hypoxia

Journal of Fish Biology, EarlyView.
Abstract Florida's shallow seagrass beds experience daily diurnal fluctuations in environmental oxygen, leading to hypoxic episodes (PO2 < 2 mg L−1, ~6 kPa) that have increased in frequency and intensity in recent decades. The native Gulf toadfish (Opsanus beta) have been shown to employ a suite of adaptive cardiovascular, ventilatory and metabolic ...
Anastasiya Plotnikova, Isabelle R. Nelson, Shara Y. Sookhoo, Jacob M. Belkin, Vanessa P. Lima, Ross D. Bronfman Bunch, Athena M. Santomero, Sophia A. Santomero, Emily C. Rodriguez, Jayda K. Rodriguez, Kathleen M. Davis, Amanda J. Kaplan, Lucy M. Schwartz, Vivienne S. Clarke, Henry W. Sage, Ana I. Ruiz Criado, Kennedy T. Diamond, M. Danielle McDonald   +17 more
wiley   +1 more source

Non-Additive and Asymmetric Allelic Expression of p38 mapk in Hybrid Tilapia (Oreochromis niloticus ♀ × O. aureus ♂)

Animals
Hybridization is a widely used breeding technique in fish species that enhances desirable traits in cultured species through heterosis. However, the mechanism by which hybrids alter gene expression to form heterosis remains unclear.
Zihui Liu, Binglin Chen, Zhiying Zou, Dayu Li, Jinglin Zhu, Jie Yu, Wei Xiao, Hong Yang   +7 more
doaj   +1 more source

Individual identification of bony fishes using unique body markings: Implications and applications

Journal of Fish Biology, EarlyView.
Abstract The natural variation in animal body markings, such as spots, stripes and blotches, offers a powerful tool for researchers, conservationists, citizen scientists and resource managers to distinguish specific individuals within species. By building libraries of photo‐identified individuals, we can track and differentiate individuals over time ...
Katie Dunkley, Samuel R. Matchette, Cheuk Yu Hau, Christian Drerup, Roxanne B. Holmes, Yvonne Sadovy de Mitcheson, James E. Herbert‐Read   +6 more
wiley   +1 more source

Synthesis of aquaculture policy and development approaches in Africa [PDF]

, 2012
The WorldFish Center was tasked to undertake a study to access, collate and develop background materials to produce an internationally linked and Africa-wide perspective on sectorally relevant policy issues.
Chapotera, M., Chinsinga, B., Jamu, D.
core  

‘It's not much, but it's honest work’: The status of environmental DNA analyses of fish biodiversity in southern Africa

Journal of Fish Biology, EarlyView.
Abstract Environmental DNA (eDNA) biodiversity surveys have the power to transform the detection of species in natural environments, which is crucial for the conservation and management of freshwater, estuarine and marine environments. Globally, eDNA‐based analyses have increased significantly, with fishes being the most widely studied aquatic ...
Sophie von der Heyden
wiley   +1 more source