Results 81 to 90 of about 75,432 (273)

Climate tracking by freshwater fishes suggests that fish diversity in temperate lakes may be increasingly threatened by climate warming

Diversity and Distributions, Volume 29, Issue 2, Page 300-315, February 2023., 2023
Abstract Aim Many freshwater fishes are migrating poleward to more thermally suitable habitats in response to warming climates. In this study, we aimed to identify which freshwater fishes are most sensitive to climatic changes and asked: (i) how fast are lakes warming? (ii) how fast are fishes moving?
Thomas Wu, Mohammad Arshad Imrit, Zahra Movahedinia, Jude Kong, R. Iestyn Woolway, Sapna Sharma   +5 more
wiley   +1 more source

Applications of Asymptotic Riesz Representation Theorem [PDF]

arXiv, 2012
We review the relation between compact asymptotic spectral measures and certain positive asymptotic morphism on locally compact spaces via asymptotic Riesz representation theorem, as introduced by Martinez and Trout [3]. Applications to this theorem will be discus.
arxiv  

A Thom Isomorphism for Infinite Rank Euclidean Bundles [PDF]

Homology, Homotopy, and Applications, 5 no. 1 (2003) 121-159, 2003
An equivariant Thom isomorphism theorem in operator K-theory is formulated and proven for infinite rank Euclidean vector bundles over finite dimensional Riemannian manifolds. The main ingredient in the argument is the construction of a non-commutative C*-algebra associated to a bundle E -> M, equipped with a compatible connection, which plays the role ...
arxiv  

Importance of proteins and mitochondrial changes as freshness indicators in fish muscle post‐mortem

Journal of the Science of Food and Agriculture, EarlyView.
Abstract Evaluating protein and mitochondrial alterations post‐mortem can contribute to determining correlations between fish‐processing parameters and ultimate fish muscle quality. The myofibrillar protein alteration during rigor mortis directly affects the texture of fish muscle.
Nima Hematyar, Tomas Policar, Turid Rustad   +2 more
wiley   +1 more source

Resource use of crucian carp along a lake productivity gradient is related to body size, predation risk, and resource competition

Ecology of Freshwater Fish, Volume 32, Issue 1, Page 10-22, January 2023., 2023
Abstract Generalist fish species can feed on a wide resource spectrum and across trophic levels depending on resource availability and trophic interactions. Crucian carp (Carassius carassius) represents a good candidate species to investigate variation in the trophic ecology of generalist fish as it can be found in highly variable fish communities and ...
Ilaria de Meo, Kjartan Østbye, Kimmo K. Kahilainen, Brian Hayden, Marius Magnus, Antonio B. S. Poléo   +5 more
wiley   +1 more source

Effect of Replacing Fishmeal with Algal Meal on Growth Parameters and Meat Composition in Rainbow Trout (Oncorhynchus mykiss W.)

Fishes
Aquafarms should reduce the use of fishmeal and fish oil in nutritional feed. One such accessible and relatively inexpensive food component that could successfully meet the challenge posed by aquaculture is algae.
Katya Velichkova, Ivaylo Sirakov, Stefka Stoyanova, Apostol Simitchiev, David Yovchev, Kamelia Stamatova-Yovcheva   +5 more
doaj   +1 more source

On C*-algebras and K-theory for infinite-dimensional Fredholm Manifolds [PDF]

arXiv, 2004
Let M be a smooth Fredholm manifold modeled on a separable infinite-dimensional Euclidean space E with Riemannian metric g. Given an (augmented) Fredholm filtration F of M by finite-dimensional submanifolds (M_n), we associate to the triple (M, g, F) a non-commutative direct limit C*-algebra A(M, g, F) = lim A(M_n) that can play the role of the algebra
arxiv  

Spatially‐explicit foraging by an apex predator linked to nearshore prey and their accessibility in lakes

Oikos, EarlyView.
Habitat coupling – where mobile predators forage over broad spatial scales and, in doing so, link food webs from semi‐discrete habitat patches – has emerged as a major structuring force in lake ecosystems. For the cold‐water apex predator lake trout Salvelinus namaycush, food‐web structure and morphometry‐driven accessibility to nearshore areas in ...
Tazi H. Rodrigues, Lee E. Hrenchuk, Paul J. Blanchfield   +2 more
wiley   +1 more source

Behavioural thermoregulation in cold‐water freshwater fish: Innate resilience to climate warming?

Fish and Fisheries, Volume 24, Issue 1, Page 187-195, January 2023., 2023
Abstract Behavioural thermoregulation enables ectotherms to access habitats providing conditions within their temperature optima, especially in periods of extreme thermal conditions, through adjustments to their behaviours that provide a “whole‐body” response to temperature changes.
Fatima Amat‐Trigo, Demetra Andreou, Phillipa K. Gillingham, J. Robert Britton   +3 more
wiley   +1 more source

Novel Nongenomic Signaling by Glucocorticoid May Involve Changes to Liver Membrane Order in Rainbow Trout [PDF]

arXiv, 2017
Stress-induced glucocorticoid elevation is a highly conserved response among vertebrates. This facilitates stress adaptation and the mode of action involves activation of the intracellular glucocorticoid receptor leading to the modulation of target gene expression. However, this genomic effect is slow acting and, therefore, a role for glucocorticoid in
arxiv