Results 81 to 90 of about 8,805 (247)

Limitations to Starch Utilization in Barramundi (Lates calcarifer) as Revealed by NMR-Based Metabolomics

Frontiers in Physiology, 2020
Practical diets for commercial barramundi production rarely contain greater than 10% starch, used mainly as a binding agent during extrusion. Alternative ingredients such as digestible starch have shown some capacity to spare dietary protein catabolism ...
Mariana Palma, Lauren H. Trenkner, Lauren H. Trenkner, João Rito, João Rito, Ludgero C. Tavares, Emanuel Silva, Brett D. Glencross, John G. Jones, Nicholas M. Wade, Ivan Viegas, Ivan Viegas   +11 more
doaj   +1 more source

A reassessment of the carnivorous status of salmonids: Hepatic glucokinase is expressed in wild fish in Kerguelen Islands

Science of The Total Environment, 2018
Salmonids belong to a high trophic level and are thus considered as strictly carnivorous species, metabolically adapted for high catabolism of proteins and low utilisation of dietary carbohydrates. However they conserved a "mammalian-type" nutritional regulation of glucokinase encoding gene and its enzymatic activity by dietary carbohydrates which ...
Marandel, Lucie, Gaudin, Philippe, Gueraud, Francois, Glise, Stéphane, Herman, Alexandre, Plagnes- Juan, Elisabeth, Veron, Vincent, Panserat, Stéphane, Labonne, Jacques   +8 more
openaire   +3 more sources

Contrasting properties of predation and scavenging networks governed by megaherbivores in an African savannah

Journal of Animal Ecology, EarlyView.
For the first time, predation and scavenging networks are directly compared within a single ecosystem. Using an 8‐year dataset of African mammals, including megaherbivores, this study reveals distinct structural rules and body mass constraints, providing a scalable framework for studying consumer–resource dynamics and ecosystem function.
Solange Alexandra Batista‐Nunes, Esther Sebastián‐González, Femke Broekhuis, Frank van Langevelde, Niels Mogensen, Marcos Moleón   +5 more
wiley   +1 more source

Global meta‐analysis reveals urban‐associated behavioural differences among wild populations

Journal of Animal Ecology, EarlyView.
Urbanization drives rapid phenotypic change, yet broad patterns of behavioural responses remain unclear. Using a global phylogenetic meta‐analysis, we show urban populations exhibit increased boldness, aggression, exploration and activity—especially in birds—highlighting consistent behavioural shifts and revealing major taxonomic gaps that limit our ...
Tracy T. Burkhard, Ned A. Dochtermann, Anne Charmantier   +2 more
wiley   +1 more source

Mercury bioaccumulation in fish of commercial importance from different trophic categories in an Amazon floodplain lake

Neotropical Ichthyology
Thirty-two species of commercially important fish from three trophic levels and nine trophic categories were sampled at a floodplain lake of the Solimões River (Lago Grande de Manacapuru).
Sandra Beltran-Pedreros, Jansen Zuanon, Rosseval Galdino Leite, José Reinaldo Pacheco Peleja, Alessandra Barros Mendonça, Bruce Rider Forsberg   +5 more
doaj   +1 more source

Carcass yield of surubins Pseudoplatystoma spp. reared in ponds under different stocking densities

Semina: Ciências Agrárias, 2014
The aim of this study was to evaluate carcass yield of surubins Pseudoplatystoma spp. reared in ponds under different stocking densities. We performed a completely randomized design, with three treatments (density) and nine repetitions.
Letícia Emiliani Fantini , Carlos Antonio Lopes de Oliveira , Robson Andrade Rodrigues   +2 more
doaj   +1 more source

Predator‐guild‐specific parental responses mitigate higher predation risk on ground nests close to forest patches in a mosaic landscape

Journal of Animal Ecology, EarlyView.
Predation increases close to habitat edges, but how animals cope with local predation variations remained poorly studied. In a mosaic landscape, lapwings were compensating for increased nest predation close to forests. They acted more aggressively towards an avian predator when nesting close to trees, but comparatively tamer against a mammal.
Guillaume Dillenseger, Justine Delautre, Ankitha Jayanth, Zora Marchal, Petr Veselý, Vojtěch Kubelka   +5 more
wiley   +1 more source

The role of carnivorous zooplankton in the dynamics of trophic fish - Plankton interactions

, 2000
A conceptual (minimal) model of the aquatic community is proposed, which includes phytoplankton, zooplankton, fish and fish larvae. It is shown that carnivorous zooplankton increases the system stability when the fish predation changes.
Li, B. L., Tikhonova, I. A., Malchow, H., Medvinskii, A. B.   +3 more
core  

Social organization and habitat use shape the gut microbiome of a marine fish

Journal of Animal Ecology, EarlyView.
This study provides the first evidence linking habitat use—and to a lesser extent social organization—to gut microbiome composition in a wild marine fish. The results indicate that local habitat conditions are the primary driver of microbial variation, while social effects are detectable but weak.
Aina Pons, Eneko Aspillaga, Ignacio A. Catalán, Tomeu Viver, Robert Arlinghaus, Martina Martorell‐Barceló, Margarida Barcelo‐Serra, Josep Alós   +7 more
wiley   +1 more source

Fish communities and trophic metrics as measures of ecological degradation: a case study in the tributaries of the river Ganga basin, India

Revista de Biología Tropical, 2013
In India, freshwater aquatic resources are suffering from increasing human population, urbanization and shortage of all kind of natural resources like water.
Vineet Kumar Dubey, Uttam Kumar Sarkar, Ajay Pandey, Wazir Singh Lakra   +3 more
doaj