Results 11 to 20 of about 124,237 (301)

The Amazon sailfin catfish Pterygoplichthys disjunctivus x pardalis (Siluriformes: Loricariidae) in Panamá

open access: yesCuadernos de investigación UNED, 2022
Introduction: Despite having a rich and diverse native freshwater fish fauna, exotic species have been introduced to Panama since the 20th century. Objective: To report its presence in the fresh waters of Panama of a newly recorded exotic fish. Methods:
Rigoberto González Gutiérrez
doaj   +1 more source

Biotic differentiation in headwater creeks after the massive introduction of non-native freshwater aquarium fish in the Paraíba do Sul River basin, Brazil

open access: yesNeotropical Ichthyology, 2021
This study evaluated fish beta diversity in six headwater creeks located in the area affected by the largest ornamental aquaculture center implemented in the Minas Gerais State, southeastern Brazil.
André Lincoln B. Magalhães   +5 more
doaj   +1 more source

Invasion alert: new record of the exotic Gambusia holbrooki Girard, 1859 in the Puna Austral region, Northwestern of Argentina [PDF]

open access: yesNeotropical Biology and Conservation, 2019
We report the first record of Gambusia holbrooki Girard, 1859 at elevations above 1,615 m in the Puna Austral, Provincia Catamarca, Argentina. This fish was introduced by intentional release.
Julieta Andreoli Bize, Luis Fernández
doaj   +3 more sources

Effect of natural and synthetic androgen hormone on sex reversal of Nile Tilapia (Oreochromis niloticus) [PDF]

open access: yesBrazilian Journal of Biology, 2023
The present study aimed to produce a monosex population of all male Nile tilapia (Oreochromis spp.) using 17α-methyl testosterone and common carp testes (as a source of natural androgen). Trial was conducted into two consecutive phases, the first was fry
F. Asad   +10 more
doaj   +1 more source

Land use, associated eel production, and abundance of fish and crayfish in streams in Waikato, New Zealand [PDF]

open access: yes, 1997
The density and biomass of fish and crayfish, and the production of eels, was compared among streams in native forest, exotic forest, and pasture. Populations were estimated by multiple-pass electroshocking at 11 sites in hill-country streams in the ...
Cairns D., Hicks B. J., Hopkins C. L.
core   +2 more sources

First confirmed record of the blue tang, Acanthurus  coeruleus (Actinopterygii: Perciformes: Acanthuridae) in the Mediterranean [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2015
A single specimen of a sub-adult specimen of the Atlantic species, Acanthurus coeruleus Bloch et Schneider, 1801, was collected in the Mediterranean coast of Israel.
D. Golani   +2 more
doaj   +3 more sources

Aquaculture production and its environmental sustainability in Thailand : challenges and potential solutions [PDF]

open access: yes, 2020
Though aquaculture plays an important role in providing foods and healthy diets, there are concerns regarding the environmental sustainability of prevailing practices.
Goethals, Peter   +5 more
core   +1 more source

Sustainable Management of Exotic Fish Biodiversity in Karnataka

open access: yesEcology, Economy and Society – The INSEE Journal, 2023
Fish biodiversity, a significant part of the aquatic ecosystem, has been studied widely in India. However, the distribution and diversity of fish species have not been well-researched at the state and/or regional levels. Karnataka is bestowed with 8% of the country’s water resources, which are under extreme pressure because of unregulated population ...
Amie Chakma   +2 more
openaire   +3 more sources

Analisis Kelayakan Usahatani Exotic Fish Indonesia

open access: yesJurnal Ilmiah Sosio Agribis, 2023
ABSTRACTFarming feasibility is an effort to determine the feasibility level of a business seen from certain parameters or eligibility criteria. Farming can be said to be feasible if it is able to provide benefits to farmers and farmers obtain income that can cover all costs incurred for procuring factors of production.
openaire   +1 more source

Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents. [PDF]

open access: yes, 1997
Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Biggs B., Lester P. J., Main M. L.
core   +2 more sources

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