Results 91 to 100 of about 1,324,789 (341)

Values of inland fisheries in the Mekong river basin [PDF]

open access: yes, 2008
Asia has the most productive inland fisheries in the world. The fishery sector contributes significantly to the national economies of the region. Inland fisheries also improve food security by providing a source of protein and a livelihood for millions ...
Baran, E., Chanton, K.C., Jantunen, T.
core  

The paradox of mosquito net fishing: Complex socio‐ecological trade‐offs in southwestern Madagascar

open access: yesPeople and Nature, EarlyView.
Abstract Small‐scale fisheries are vital for the livelihoods, nutrition and well‐being of millions of people in coastal regions. In many parts of the Global South, rising poverty, limited alternatives and declining resources have driven the spread of mosquito net fishing (MNF), a non‐selective practice using repurposed health‐distributed nets.
Francéline Marie Rasoanirina   +6 more
wiley   +1 more source

Lake-size dependency of wind shear and convection as controls on gas exchange [PDF]

open access: yes, 2012
High-frequency physical observations from 40 temperate lakes were used to examine the relative contributions of wind shear (u*) and convection (w*) to turbulence in the surface mixed layer.
Alo Laas   +43 more
core   +3 more sources

New evidence on palaeoenvironmental conditions in SW Cameroon since the Late Pleistocene derived from alluvial sediments of the Ntem River [PDF]

open access: yes, 2010
An interior delta in the lower course of the Ntem River near the sub-prefecture Ma’an was identified after interpretation of satellite images, topographical maps of SW Cameroon and geological as well as hydrological references and a reconnaissance ...
Sangen, Mark
core  

Controlling banana bunchy top disease in Benin: Crop protection strategies with socio‐economic perspectives

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Banana and plantain are vital for food security and income in West Africa, yet banana bunchy top virus (BBTV) threatens production. This study combined remote sensing, field surveys, modelling and socio‐economic analysis to assess BBTV spread and control strategies in Benin.
Renata Retkute   +13 more
wiley   +1 more source

Temporal variation of phytoplankton in a small tropical crater lake, Costa Rica

open access: yesRevista de Biología Tropical, 2010
The temporal variation in lake’s phytoplankton is important to understand its general biodiversity. For tropical lakes, it has been hypothesized that they follow a similar pattern as temperate ones, on a much accelerated pace; nevertheless, few case ...
Gerardo Umaña-Villalobos
doaj  

Biogeochemistry of a large and deep tropical lake (Lake Kivu, East Africa: insights from a stable isotope study covering an annual cycle

open access: yes, 2014
. During this study, we investigated the seasonal variability of the concentration and the stable isotope composition of several inorganic and organic matter (OM) reservoirs in the large, oligotrophic and deep tropical Lake Kivu (East Africa).
C. Morana   +8 more
semanticscholar   +1 more source

Open letter: The need for a site‐based biodiversity standard measuring and certifying impacts from nature‐based projects

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Despite growing investment in restoration, weak accountability and poor biodiversity monitoring mean many projects fail to achieve ecological recovery. The Global Biodiversity Standard (TGBS) offers a practical way to ensure that restoration finance delivers measurable gains for nature.
David Bartholomew   +254 more
wiley   +1 more source

Distribution and fluctuations of backswimmers (Notonectidae) in a tropical shallow lake and predation on microcrustaceans

open access: yesBrazilian Journal of Biology
Notonectids are widely distributed in freshwaters and can prey on zooplankton in temperate lakes. However, its role in structuring the zooplankton community is unknown in tropical lakes.
A. R. Domingos, M. S. Arcifa
doaj   +1 more source

Design, implementation and evaluation of a national campaign to distribute nine million free LLINs to children under five years of age in Tanzania. [PDF]

open access: yes, 2011
BACKGROUND\ud \ud After a national voucher scheme in 2004 provided pregnant women and infants with highly subsidized insecticide-treated nets (ITNs), use among children under five years (U5s) in mainland Tanzania increased from 16% in 2004 to 26.2% in ...
Bonner, Kimberly   +10 more
core   +2 more sources

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