Results 81 to 90 of about 10,962 (212)

Distribution and abundance of fish and crayfish in a Waikato stream in relation to basin area [PDF]

open access: yes, 2003
The aim of this study was to relate the longitudinal distribution of fish and crayfish to increasing basin area and physical site characteristics in the Mangaotama Stream, Waikato region, North Island, New Zealand.
Allen K. R.   +14 more
core   +2 more sources

DNA Retention in Sea Lamprey Digestive Tracts: Insights From Controlled Feeding Experiments

open access: yesEnvironmental DNA, Volume 8, Issue 2, March/April 2026.
Host DNA from a single species was detected via DNA metabarcoding from sea lamprey digestive tracts up to 30 days post‐feeding at 5°C, 10°C, and 15°C. Multiple previous host species could be detected from a single lamprey up to 30 days after fasting at 10°C.
Conor O'Kane   +6 more
wiley   +1 more source

Fishes of the Eleven Point River Within Arkansas [PDF]

open access: yes, 1977
A survey of the fishes of the Eleven Point River and its tributaries was made between 31 January 1976 and 13 February 1977. Sixty-three collections, literature records and personal communications revealed 90 species distributed among 19 families.
Beadles, John K., Johnson, Michael B.
core   +2 more sources

Meeting Livestock Protein and Amino Acids Needs With Edible Insects: A Critical Review

open access: yesSustainable Food Proteins, Volume 4, Issue 1, March 2026.
Comparison of the use of traditional protein sources (soybean meal and fish meal) and insects meal in monogastrics and aquaculture (created in BioRender. Luttenschlager, H. (2025) https://BioRender.com/ndztqxp) ABSTRACT The increasing demand for animal‐based protein has led to biodiversity loss, deforestation, pollution, and extensive land use, mainly ...
Hugo Luttenschlager   +3 more
wiley   +1 more source

The magnetite-based receptors in the beak of birds and their role in avian navigation [PDF]

open access: yes, 2012
Iron-rich structures have been described in the beak of homing pigeons, chickens and several species of migratory birds and interpreted as magnetoreceptors.
Wiltschko, Roswitha, Wiltschko, Wolfgang
core   +1 more source

THREATENED FISHES OF THE WORLD: SALMO OBTUSIROSTRIS SALONITANA (KARAMAN, 1926) (SALMONIDAE) [PDF]

open access: yesCroatian Journal of Fisheries, 2012
Soft-muzzled trout is an endemic vulnerable species protected in Croatia. It is endangered by river regulation, industrial pollution and above all by a very restricted distribution and hybridization with foreign trout. Urgent habitat protection with bans
Nikica Šprem   +4 more
doaj  

Long-Term Conservation of Ohnologs Through Partial Tetrasomy Following Whole-Genome Duplication in Salmonidae

open access: yesG3: Genes, Genomes, Genetics, 2019
Whole-genome duplications (WGDs) have occurred repeatedly and broadly throughout the evolutionary history of eukaryotes. However, the effects of WGD on genome function and evolution remain unclear.
Matthew A. Campbell   +4 more
doaj   +1 more source

Selective plankton feeding by the coregonid ”bondella” (Coregonus sp.) of Lake Maggiore [Translation from: Translation from: Memorie dell'Istituto Italiano di Idrobiologia Dott.Marco de Marchi 31 181-203, 1974] [PDF]

open access: yes, 1979
In recent times, some specialists have begun to study the subject of food selection of fish in an organized way, thus highlighting its importance. In the present work, the author intends to evaluate the impact of predation on the eupelagic zooplanktonic ...
Guissani, G.
core  

Water Framework Directive Intercalibration: Central-Baltic Lake Fish fauna ecological assessment methods [PDF]

open access: yes, 2016
The European Water Framework Directive (WFD) requires the national classifications of good ecological status to be harmonised through an intercalibration exercise. In this exercise, significant differences in status classification among Member States are
ARGILLIER CHRISTINE   +20 more
core   +1 more source

Consequences of temperature and temperature variability on swimming activity, group structure, and predation of endangered delta smelt [PDF]

open access: yes, 2019
The effects of water temperature on individual and group movement behaviour in prey fish can affect ecological interactions such as competition and predation, but how variability in temperature influence fish behaviour is less understood.
Baxter, RD   +7 more
core   +1 more source

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