Results 21 to 30 of about 53,048 (173)

Environmental DNA (eDNA) and Field Surveys as Complementary Tools for the Biomonitoring of Amphibian Communities

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 2, February 2026.
ABSTRACT Amphibians are facing large population declines as a result of both natural and anthropogenic threats. Reconstructing and understanding the composition and structure of amphibian communities is essential for developing effective monitoring and conservation strategies.
Alejandro Nistal‐García, Pedro García‐García, Luís Albero, Eloy Bécares, Jorge García‐Girón   +4 more
wiley   +1 more source

El Impacto del Bono Demográfico en el Sector Educativo Argentino. Periodo 2010-2040. Un Abordaje Interdisciplinario

International Journal of Sociology of Education, 2015
Conforme avanza la transición demográfica existe un periodo de tiempo de descenso sostenido de la fecundidad, mientras tanto aún no es muy grande el peso relativo de la población mayor de edad y, por tanto, la principal proporción de la población se ...
Fernando Ariel Manzano
doaj   +1 more source

Wetland location and captive breeding influence trans‐Mediterranean movements in the endangered Marbled Duck (Marmaronetta angustirostris)

Ibis, Volume 168, Issue 1, Page 245-258, January 2026.
Waterbirds distributed in semi‐arid and arid regions seem to have adapted their behaviour to the availability and seasonality of wetlands, increasing their mobility range. The Marbled Duck Marmaronetta angustirostris is a threatened waterbird that shows trans‐Mediterranean movements but these are poorly known.
Irene Pacheco‐Guardiola, Juan Manuel Pérez‐García, Óscar Aldeguer, Marcos Ferrández, Claudine de le Court, Juan Antonio Gómez, Francisco Botella   +6 more
wiley   +1 more source

Evaluation of demographic dynamics and Vulnerability in Chaco province (Argentina) [PDF]

, 2009
La provincia del Chaco, un área relegada de la República Argentina, históricamente, estuvo marcada por sucesivas crisis económicas que afectaron a la sociedad en su conjunto y a los habitantes en particular, transformando sus conductas y sus procesos ...
Foschiatti, Ana Maria Hilda
core  

Genetic Assignment at Different Geographical Levels: A Case Study in a Forest Tree Species (Pinus pinaster Ait.) Using SNP Markers

Evolutionary Applications, Volume 18, Issue 12, December 2025.
ABSTRACT Genetic markers can assist in the identification of the stock origin in different organisms. Comparative studies of forest tree provenances have demonstrated that forest tree populations differ in performance across environments and at multiple geographic levels: populations nested within regions nested within gene pools.
Sanna Olsson, Delphine Grivet, Marjana Westergren, Santiago C. González‐Martínez, Ricardo Alía, Juan José Robledo‐Arnuncio   +5 more
wiley   +1 more source

Pregnant Women With Ulcerative Colitis Have a Higher Risk of Delivering Small‐For‐Gestational‐Age Infants: The Japan Environment and Children's Study (JECS)

Journal of Obstetrics and Gynaecology Research, Volume 51, Issue 10, October 2025.
ABSTRACT Aim Ulcerative colitis primarily affects individuals of reproductive age, raising concerns regarding its impact on pregnancy, lactation, and postpartum outcomes. Although numerous international studies exist, research on the Japanese population remains limited.
Tamami Tsuzuki, Marina Minami, Ryuhei Nagai, Yusuke Oki, Hedeyuki Miyachi, Masamitsu Eitoku, Narufumi Suganuma, Nagamasa Maeda, The Japan Environment and Children's Study Group, Michihiro Kamijima, Shin Yamazaki, Maki Fukami, Reiko Kishi, Chiharu Ota, Koichi Hashimoto, Chisato Mori, Shuichi Ito, Ryoji Shinohara, Hidekuni Inadera, Takeo Nakayama, Ryo Kawasaki, Yasuhiro Takeshima, Seiji Kageyama, Narufumi Suganuma, Shoichi Ohga, Takahiko Katoh   +25 more
wiley   +1 more source

Dos modelos de transición demográfica en América Latina

Perfiles Latinoamericanos, 1995
La transición demográfica en América Latina empezó en 1930 con la baja de la mortalidad, seguida en 1965 por la baja de la fecundidad, paralelamente a un intenso proceso de modernización de las sociedades y economías del subcontinente.
Ma. Eugenia Zavala de Cosío
doaj  

En busca de la energía sostenible [PDF]

, 2005
Nombrado Doctor Honoris Causa en ...
Williamson, Jeffrey G.
core   +1 more source

Demographic performance review of a reintroduction project: Iberian lynx in Extremadura

Journal of Applied Ecology, Volume 62, Issue 9, Page 2189-2201, September 2025.
Demographic performance reviews are essential for understanding the drivers of population growth and for evaluating the outcomes of reintroduction initiatives. IPMs as exemplified by our Iberian lynx case study provide a powerful and flexible framework for quantifying reintroduction performance and addressing key research and management questions.
José Jiménez, Matías Taborda, Pablo Ferreras, Maria Jesús Palacios, Fernando Nájera, Jorge Peña, Marc Kéry, Michael Schaub   +7 more
wiley   +1 more source

Individualización social y cambios demográficos: ¿hacia una segunda transición demográfica?

Revista Latinoamericana de Población, 2007
Cuando todavía no se había extinguido el debate sobre la pertinencia de aplicar la teoría de la transición demográfica a la realidad latinoamericana, desde mediados de los ochenta surgió en diversos círculos académicos europeos una nueva teoría, heredera
Israel Montiel Armas
doaj