Seasonal influences on freshwater fisheries sampling data

Management Challenges of Freshwater Fisheries in Africa

Many African countries are among the poorest in the world and as a result, the development objective of most African countries is to reduce or even eradicate poverty through modernising agricultural production including fisheries. In countries around Lake Victoria, fisheries contribute 3-5% of GDP. Fisheries also contribute significantly to export earnings of a number of African countries. On a...

Control and Regulation of Freshwater Fisheries

River and Freshwater Influences

A coupled circulation-and-ecosystem model, developed as part of the RISE (River Influences on Shelf Ecosystems) program, is used to examine the role of the Columbia River plume in shaping broad patterns of nutrient flux and primary production on the Washington and Oregon coasts. Realistic simulations of summer 2004 and 2005 in ROMS (Regional Ocean Modeling System) are forced by winds from the M...

Seasonal influences on childhood lead exposure.

We conducted a study to examine seasonal changes in residential dust lead content and its relationship to blood lead in preschool children. We collected blood and dust samples (floors, windowsills, and carpets) to assess lead exposure. The geometric mean blood lead concentrations are 10.77 and 7.66 microg/dL for the defined hot and cold periods, respectively (p < 0.05). Lead loading (milligrams...

Seasonal Influences on Different Stages of In Vitro Fertilization: Stimulation and Fertilization

Background Effect of seasonal changes in human reproduction has been intensively researched. Some studies acknowledge influences of seasonal variation on natural conception, while others can not confirm them. The aim of this study was to investigate the effect of seasonal changes on different stages of assisted reproductive technology (ART) in Tehran. MaterialsAndMethods This study was carried ...