Results 111 to 120 of about 307,223 (237)

From the classroom to an opinion note: complementary analysis of the genetic structure of the neotropical tree manilkara zapota (L) P. Royen (Sapotaceae) [PDF]

open access: yes, 2017
Here, we describe a learning strategy that results an excellent choice for a first approach of students to produce scientific knowledge that can be confronted in the scientific field as well as recognize in this knowledge the transferability to the ...
Barrandeguy, Maria Eugenia   +2 more
core  

An integrated approach to balance freshwater connectivity restoration and invasion risk

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract Habitat fragmentation negatively affects many native migratory fish populations. However, this fragmentation can also prevent the spread and establishment of invasive species. We modified the dendritic connectivity index (DCI), a commonly used freshwater connectivity metric, to account for multiple invasive dispersal pathways in estimates of ...
Alex Arkilanian   +3 more
wiley   +1 more source

Reflexiones sobre la explotación, recuperación y extinción de poblaciones naturales

open access: yes, 2004
The common idea that human exploitation frequently provokes irreversible changes on natural living resources may not be entirely justified; there are evidences based on genetics and population dynamics indicating that there are no apparent reasons as to believe that natural populations can not recover after human influence has been suppressed. It seems
Pablo del Monte Luna, Daniel Lluch Belda
openaire   +2 more sources

Estudio del alelismo de letales en poblaciones naturales de Drosophila subobscura

open access: yes, 1988
En el presente trabajo se ha abordado el estudio del proceso colonizador de Norte y Sudamérica por parte de la especie D. Subobscura mediante el análisis de la variabilidad genética a nivel de genes letales. Se ha comparado la estructura genético poblacional de una población autóctona paleártica (Bordils, Girona) y una colonizadora americana (Gilroy ...
openaire   +2 more sources

Caracterización de las poblaciones de enemigos naturales de Piezodorus guildinii (Westwood) (Hemiptera: Pentatomidae)

open access: yesAgrociencia, 2008
Piezodorus guildinii (Westwood) afecta a soja y leguminosas forrajeras provocando que en la primera se realicen todos los años entre una y dos aplicaciones de insecticidas. Con el objetivo de determinar, en soja y alfalfa, las fluctuaciones de las poblaciones de sus enemigos naturales y su eficacia, se realizaron muestreos en la Estación Experimental ...
A. Ribeiro, E. Castiglioni
openaire   +1 more source

Using incentive payments to promote human–carnivore coexistence

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract For many large carnivores, minimizing the financial burden they impose on local people is critical to their conservation. Incentive‐based programs that provide people with financial benefits for taking pro‐conservation actions or achieving conservation goals are a promising tool for promoting human–carnivore coexistence. Although the number of
Adam Pekor   +9 more
wiley   +1 more source

Estudio de esterasas en poblaciones naturales de Drosophila subobscura. 20 pp.

open access: yes, 1976
Uploaded by Plazi for TaxoDros. We do not have abstracts.
openaire   +1 more source

Evaluación del estado de poblaciones naturales con cuatro indicadores: Aplicación a una especie insular [PDF]

open access: yes, 2019
[EN] The aim of this study is to assess the health status of different populations of P. lilfordi, an endemic lizard of the Balearic Islands. The health status and potential environmental stress to which these populations are subject estimaatendiendo four independent indicators, putting both to test its reliability and searching for the possible ...
openaire   +2 more sources

Análisis de once poblaciones naturales de Taxus globosa en la Sierra Madre Oriental

open access: yesMadera y Bosques, 2016
Se ubicaron y estudiaron once poblaciones de Taxus globosa a lo largo de la Sierra Madre Oriental en los estados de Nuevo León y Tamaulipas, México. A través de muestreo total se contabilizaron todos los individuos en las poblaciones, registrando además altura, cobertura aérea, diámetro y densidad de esta especie.
Mario A. García-Aranda   +3 more
openaire   +3 more sources

Report of the Inter-American Tropical Tuna Commission for the year 1955 [PDF]

open access: yes, 1956
ENGLISH: This is the fifth year of investigations, by the Inter-American Tropical Tuna Commission, of the fisheries for tunas and tuna-bait fishes in the Eastern Pacific Ocean adjacent to the shores of the Americas.

core  

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