World Population Trends 1920–47

1951 ◽  
Vol 27 (2) ◽  
pp. 224-224
Author(s):  
Brigitte Long
Keyword(s):  
Population Trends ◽  
World Population

World Population Trends

Nature ◽  
1961 ◽  
Vol 191 (4796) ◽  
pp. 1346-1347
Keyword(s):  
Population Trends ◽  
World Population

scholarly journals Long-term population trends of the Red-legged CormorantPhalacrocorax gaimardion the Argentine coast

2014 ◽  
Vol 25 (2) ◽  
pp. 234-241 ◽  
Author(s):  
ANA MILLONES ◽  
PATRICIA GANDINI ◽  
ESTEBAN FRERE
Keyword(s):  
Population Change ◽  
Breeding Population ◽  
Temporal Variations ◽  
Population Trends ◽  
World Population ◽  
Ocean Productivity ◽  
Marine Primary Productivity ◽  
Long Term Trend ◽  
Positive Effect

SummaryThe world population of Red-legged CormorantPhalacrocorax gaimardiis reasonably small and has showed rapid declines. In Argentina, this species breeds in 13 localities and is considered as ‘Endangered’ by the national government. In this study, we provide information about population trends of the Red-legged Cormorant on the Argentine coast, between 1990 and 2009. We also discuss whether these trends could be related to sea surface temperature and marine primary productivity, both of which are considered oceanographic factors that can affect breeding seabirds. The long-term trend in the breeding population showed a slight decrease of 1.2% per year. Seven colonies showed an average population change < 1. Periods of stability and increase were identified over the study period, but they were insufficient to compensate for the decreases. The largest colony of Red-legged Cormorants (La Mina, with more than 55% of the entire breeding population) seems to determine the overall population trend. We did not find a direct relationship between the overall number of Red-legged Cormorants and the two oceanographic factors analysed. However, our analysis detected a positive effect of ocean productivity close to the coast on the largest colony at the beginning of the breeding season, suggesting that coastal ocean productivity could be an important factor affecting temporal variations in the Argentinian population.

World population trends

1990 ◽  
Vol 11 (3) ◽  
pp. 21-29
Author(s):  
Frances Cairncross
Keyword(s):  
Population Trends ◽  
World Population

Are World Population Trends a Problem?

1985 ◽  
Vol 16 (5) ◽  
pp. 291
Author(s):  
Ben Wattenberg ◽  
Karl Zinsmeister
Keyword(s):  
Population Trends ◽  
World Population

Are World Population Trends a Problem?

1985 ◽  
Vol 11 (3) ◽  
pp. 564
Author(s):  
[Geoffrey McNicoll] ◽  
Ben Wattenberg ◽  
Karl Zinsmeister
Keyword(s):  
Population Trends ◽  
World Population

Brief Review of World Population Trends: Summary

2012 ◽  
Author(s):  
Gene Shackman ◽  
Xun Wang ◽  
Ya-Lin Liu
Keyword(s):  
Population Trends ◽  
World Population
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