Results 91 to 100 of about 1,764 (204)

Population structure and relative growth of freshwater prawn Macrobrachium amazonicum (HELLER, 1862) (Crustacea, Palaemonidae) in two regions of the State of Amapá, Amazon River mouth, Brazil. [PDF]

open access: yes, 2017
Macrobrachium amazonicum is an indigenous prawn vastly distributed in basins of South America, widely exploited by artisanal fisheries in northern and northeastern Brazil and, with great potential for aquaculture.
LIMA, J. de F., SILVA, L. M. A. da
core   +4 more sources

Australian environmental issues : an overview. [PDF]

open access: yes, 1998
Australia is experiencing significant environmental problems both on land and in its marine areas and several of these problems are interconnected. Clearing of trees and woodland is still substantial and apart from adding to CO2 emissions, has a number ...
Tisdell, C. A. (Clement Allan)
core  

Revisiting the History of Ornamental Aquaculture in Europe to Understand the Benefits and Drawbacks of Freshwater Fish Imports

open access: yesReviews in Aquaculture, Volume 17, Issue 2, March 2025.
ABSTRACT Ornamental aquaculture and fishkeeping are very popular with millions of enthusiasts worldwide. The number of newly imported fish species for ornamental purposes grew slowly from World War I until the 1980s. It then exponentially increased until now with more than 7900 species and a large number of scientifically undescribed morphotypes.
Jindřich Novák   +16 more
wiley   +1 more source

Величина пищевого рациона и его усвояемость у десятиногих ракообразных [PDF]

open access: yes, 2014
Десятиногие ракообразные (отряд Dekapoda) являются важнейшими элементами пищевых цепей водных экосистем. Это ресурсные виды, которые традиционно ценятся на внутреннем и особенно мировом рынке как превосходный деликатесный продукт питания, а также сырье ...
Кулеш, Виктор Федорович
core  

Inland fisheries: a valuable resource [PDF]

open access: yes, 2016
The value of small-scale inland fisheries lies in its ability to provide essential protein, micronutrients, vitamins and fats for millions of people, particularly in developing ...
Bartley, Devin M.   +4 more
core  

Impact of tank background on the welfare of the African clawed frog, Xenopus laevis (Daudin) [PDF]

open access: yes, 2016
The captive environment of a laboratory animal can profoundly influence its welfare and the scientific validity of research produced. The African clawed frog (Xenopus laevis) is a common model organism, however current husbandry guidelines lack ...
Coleman, Robert C.   +5 more
core   +1 more source

Características limnológicas da coluna d'água e dos efluentes de viveiros de criação de camarões-da-amazônia Limnological characteristics of the water column and effluents of Amazon river prawn ponds

open access: yesRevista Brasileira de Zootecnia, 2010
Os objetivos neste trabalho foram caracterizar os efluentes de viveiros de Macrobrachium amazonicum criados em diferentes densidades de cultivo e analisar a variação nictemeral (24 horas) do perfil vertical da temperatura e da saturação de oxigênio da ...
Gustavo Gonzaga Henry-Silva   +3 more
doaj   +1 more source

Ecological studies of the aquatic soil invertebrates in three inundation forests of Central Amazonia

open access: yes, 1975
From January 1971 till August 1972 ecological studies were carried out on the aquatic macroinvertebrates of the benthos community of three Central-Amazonian inundation forests.
Irmler, U.
core  

Integrated culture of Nile tilapia and Amazon river prawn in stagnant ponds, using nutrient-rich water and substrates

open access: yesAquaculture, 2019
Monoculture is an inefficient aquaculture system because on average
Rodrigues, Caio G.   +5 more
openaire   +2 more sources

Ecological studies on some lakes of the Amazon valley

open access: yes, 1967
Of the three types of lakes studied, clear water, white water, and brown water, the white water lakes are the only ones to have a reasonable autochtonous production of organic matter. Owing probably to the lack of mineral salts, the primary production is
Marlier, G.
core  

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