Fish abundance - Open Access .click

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Climate and local abundance in freshwater fishes [PDF]

Royal Society Open Science, 2016
Identifying factors regulating variation in numbers of individuals among populations across a species' distribution is a fundamental goal in ecology. A common prediction, often referred to as the abundant-centre hypothesis, suggests that abundance is highest near the centre of a species' range.
Jason H. Knouft, Melissa M. Anthony
openaire +3 more sources

Fish, coral and community structure: 35 years of change on Wistari Reef, Australia

Sustainable Aquatic Research, 2022
One hundred sites in 10 grids at Wistari Reef, Queensland were surveyed in 1971, 1999, and again in 2006. The abundance of taxa incorporating 205 fish species were recorded along with estimates of live coral cover and rugosity during each survey.
Gerald B. Goeden, Mohamad Saupi Ismail
doaj +1 more source

Spawning aggregations of checkered snapper (Lutjanus decussatus) and blackspot snapper (L. fulviflamma): seasonality, lunar-phase periodicity and spatial distribution within spawning ground [PDF]

PeerJ, 2023
Snappers (family Lutjanidae) are important fisheries target species and some species are known to form spawning aggregations at particular spawning grounds. The present study investigated the ecological characteristics of fish aggregations of two snapper
Atsushi Nanami
doaj +2 more sources

Fish predation pressure on zooplankton in a large northern temperate lake: impact of adult predators versus juvenile predators; pp. 356–367 [PDF]

Proceedings of the Estonian Academy of Sciences, 2018
In recent decades, a marked decrease in planktivorous fish (Osmerus eperlanus eperlanus m. spirinchus Pallas and Coregonus albula (L.)) in Lake Peipsi has stimulated research into the potential effect of fish predation on zooplankton.
Kai Ginter +4 more
doaj +1 more source

Automating the Analysis of Fish Abundance Using Object Detection: Optimizing Animal Ecology With Deep Learning

Frontiers in Marine Science, 2020
Aquatic ecologists routinely count animals to provide critical information for conservation and management. Increased accessibility to underwater recording equipment such as action cameras and unmanned underwater devices has allowed footage to be ...
Ellen M. Ditria +5 more
doaj +1 more source

Effects of invasive water hyacinth on fish diversity and abundance in the Lake Cluster of Pokhara Valley, Nepal

Global Ecology and Conservation, 2023
Water hyacinth (Pontederia crassipes) invasion is a growing global issue which poses a threat to aquatic life. As in the global context, the water hyacinth invasion is increasing rapidly in the lakes of Pokhara valley which is listed in Ramsar sites. Its
Rajendra Basaula +4 more
doaj +1 more source

Fish abundance with no fishing: predictions based on macroecological theory [PDF]

Journal of Animal Ecology, 2004
SummaryFishing changes the structure of fish communities and the relative impacts of fishing are assessed usefully against a baseline. A comparable baseline in all regions is fish community structure in the absence of fishing.The structure of unexploited communities cannot always be predicted from historical data because fisheries exploitation usually ...
Jennings, Simon, Blanchard, Julia L.
openaire +2 more sources

Spatial and Temporal Variations in Autumn Fish Assemblages in the Offshore Waters of the Yangtze Estuary

Diversity, 2023
The offshore waters of the Yangtze Estuary are an important fish habitat, and the large gradient of environmental conditions leads to different fish assemblages.
Zhaomin Chen, Cui Liang, Weiwei Xian
doaj +1 more source

Droplet digital PCR applied to environmental DNA, a promising method to estimate fish population abundance from humic‐rich aquatic ecosystems

Environmental DNA, 2021
Measures of environmental DNA (eDNA) concentrations in water samples have the potential to be both a cost‐efficient and a nondestructive method to estimate fish population abundance.
Eric Capo +7 more
doaj +1 more source

NEOTROPICAL FRESHWATER FISHES: A dataset of occurrence and abundance of freshwater fishes in the Neotropics

Ecology, 2023
AbstractThe Neotropical region hosts 4225 freshwater fish species, ranking first among the world's most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large‐scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north to the ...
Lívia Helena Tonella +317 more
openaire +5 more sources

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