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1.
Dealing with the complexity of effective population size in conservation practice
Ancuta Cotovelea Fedorca, Joachim Mergeay, Adejoke O. Akinyele, Tamer Albayrak, Iris Biebach, Alice Brambilla, Pamela Burger, Elena Bužan, Ino Čurik, Roberta Gargiulo, Marjana Westergren, 2024, pregledni znanstveni članek

Opis: Effective population size (Ne) is one of the most important parameters in evolutionary biology, as it is linked to the long-term survival capability of species. Therefore, Ne greatly interests conservation geneticists, but it is also very relevant to policymakers, managers, and conservation practitioners. Molecular methods to estimate Ne rely on various assumptions, including no immigration, panmixia, random sampling, absence of spatial genetic structure, and/or mutation-drift equilibrium. Species are, however, often characterized by fragmented populations under changing environmental conditions and anthropogenic pressure. Therefore, the estimation methods' assumptions are seldom addressed and rarely met, possibly leading to biased and inaccurate Ne estimates. To address the challenges associated with estimating Ne for conservation purposes, the COST Action 18134, Genomic Biodiversity Knowledge for Resilient Ecosystems (G-BiKE), organized an international workshop that met in August 2022 in Brașov, Romania. The overarching goal was to operationalize the current knowledge of Ne estimation methods for conservation practitioners and decision-makers. We set out to identify datasets to evaluate the sensitivity of Ne estimation methods to violations of underlying assumptions and to develop data analysis strategies that addressed pressing issues in biodiversity monitoring and conservation. Referring to a comprehensive body of scientific work on Ne, this meeting report is not intended to be exhaustive but rather to present approaches, workshop findings, and a collection of papers that serve as fruits of those efforts. We aimed to provide insights and opportunities to help bridge the gap between scientific research and conservation practice.
Ključne besede: Ne, effective population size, inbreeding
Objavljeno v RUP: 04.02.2026; Ogledov: 456; Prenosov: 4
.pdf Celotno besedilo (2,70 MB)
Gradivo ima več datotek! Več...

2.
On a conjecture of Erdős on size Ramsey number of star forests
Akbar Davoodi, Ramin Javadi, Azam Kamranian, Ghaffar Raeisi, 2025, izvirni znanstveni članek

Opis: Given two graphs F_1 and F_2, their size Ramsey number, denoted by r̂(F_1, F_2), is the minimum number of edges of a graph G such that for any edge coloring of G by colors red and blue, G contains either a red copy of F1 or a blue copy of F2. In this paper, we deal with the size Ramsey number of star forests (disjoint union of stars) and following a conjecture by Burr, Erdős, Faudree, Rousseau, and Schelp in 1978, we determine the exact value of r̂(⊔_{i = 1}^s K_{1, ni}, ⊔_{i = 1}^t K_{1, mi}) in several cases including when either m_i’s and n_i’s are odd, or s = 1 or s = 2 and n_1 = n_2.
Ključne besede: size Ramsey number, star forest, Ramsey minimal graph
Objavljeno v RUP: 21.10.2025; Ogledov: 1860; Prenosov: 10
.pdf Celotno besedilo (282,24 KB)

3.
On some extremal position problems for graphs
James Tuite, Elias John Thomas, Ullas Chandran S.V., 2025, izvirni znanstveni članek

Opis: The general position number of a graph G is the size of the largest set of vertices S such that no geodesic of G contains more than two elements of S. The monophonic position number of a graph is defined similarly, but with `induced path' in place of `geodesic'. In this paper we investigate some extremal problems for these parameters. Firstly we discuss the problem of the smallest possible order of a graph with given general and monophonic position numbers. We then determine the asymptotic order of the largest size of a graph with given general or monophonic position number, classifying the extremal graphs with monophonic position number two. Finally we establish the possible diameters of graphs with given order and monophonic position number.
Ključne besede: general position, monophonic position, Turán problems, size, diameter, induced path
Objavljeno v RUP: 21.10.2025; Ogledov: 535; Prenosov: 3
.pdf Celotno besedilo (396,13 KB)

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Sizes of eight oviparous elasmobranch species hatched in two Mediterranean areas : a survey and recent data
Christian Capapé, Mohamed Ben Salem, Mohamed Mourad Ben Amor, 2007, izvirni znanstveni članek

Opis: In the present paper, the authors report on the size of eight oviparous elasmobranch species hatched in two Mediterranean areas: off the Tunisian coast (central Mediterranean) and Languedocian coast (southern France, northern Mediterranean). Most of the observations were made in experimental conditions, from egg cases placed in tanks. For each species, no intraspecific variation was observed between specimens from both areas. In contrast, new hatched small spotted catsharks from the Mediterranean appeared to be smaller than those from the Atlantic.
Ključne besede: Elasmobranchs, size at hatching, oviparous species, Tunisian coast, Languedocian coast, Mediterranean
Objavljeno v RUP: 10.07.2015; Ogledov: 4363; Prenosov: 31
URL Povezava na celotno besedilo

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Board structure and corporate performance
Özgür Arslan, Mehmet Baha Karan, Cihan Eksi, 2010, izvirni znanstveni članek

Ključne besede: board size, boad independence, ROA, Tobin's Q
Objavljeno v RUP: 15.10.2013; Ogledov: 5595; Prenosov: 88
URL Povezava na celotno besedilo

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