Results 61 to 70 of about 20,742 (231)

Compound‐Specific Stable Isotope Analysis Reveals Population‐Specific Differences in Chinook Salmon Trophic Level and Basal Resource Use in the Northeast Pacific

Fisheries Oceanography, EarlyView.
ABSTRACT Chinook salmon exhibit far‐flung and disparate population‐specific marine migrations that have made it difficult to assess their trophic ecology. In this study, we collected returning and resident subadult Fraser River Chinook salmon in 2018 and 2019 from population groups with different known run‐timings (spring, summer, and fall) and marine ...
Jacob E. Lerner, Brian P. V. Hunt
wiley   +1 more source

Measurement of Auditory Thresholds of the Tilapia Tilapia niloticus.

NIPPON SUISAN GAKKAISHI, 1995
Auditory thresholds of the tilapia Tilapia niloticus in a quiet water tank were investigated using a classical conditioning procedure in a stable temperature container converted into an acoustic chamber. The classical conditioning procedure followed Ishioka's method.
Shigeru Fujieda, Takashi Ishino, Hajime Niina, Yasuhisa Matsuno, Yuichi Yamanaka, Yong-jin Chung   +5 more
openaire   +2 more sources

Freshwater fishes of the Waterberg aquatic ecoregion, South Africa: Diversity, taxonomic conflicts and conservation concerns

Journal of Fish Biology, EarlyView.
Abstract Southern Africa is a region denoted by both high levels of fish diversity, some of it cryptic and unrecognised by current taxonomy, and severely threatened freshwater ecosystems. The Waterberg, a key aquatic ecoregion of the greater Limpopo River basin in South Africa, represents an area with high terrestrial conservation value but is lacking ...
Darragh J. Woodford, Mandla Magoro, Wilbert T. Kadye, Martinus Scheepers, Yonela Sithole, Tadiwa I. Mutizwa, Tholoana Ntokoane, Albert Chakona   +7 more
wiley   +1 more source

Adaptation, growth and survival of tilapia (Oreochromis niloticus) in Bafgh brackish water

‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2013
An experiment was conducted to evaluate the possibility of adaptation, growth and survival of Nile tilapia (Oreochromis niloticus) with 0.3g initial weight and red tilapia (Oreochromis sp.) with 0.7g initial weight in underground brackish water. Fry of
H. Sarsangi A.H. email ; M. Mohammadi; N. Mashaii; F. Rajabipou; A. Bitaraf; H.M. Askari; J. Moazedi; H. Nezamabadi; H. Hosseinzadeh Sahafi
doaj  

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

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

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

Microbial Flora of Pond-Reared Tilapia (Tilapia aurea) Held on Ice

Journal of Food Protection, 1984
Microbiological and chemical characteristics for tilapia reared in 0.25-acre artificial ponds were investigated. At time of harvest, average bacterial count of the pond-reared fish was 7.3 × 102 per cm2 while pond water contained 2.2 × 104 organisms per ml.
G, Acuff, A L, Izat, G, Finne
openaire   +2 more sources

‘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

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