I describe several models of population dynamics, both unstructured and gender structured, that include groups of individuals who do not reproduce. I analyze the effect that the nonreproductive group may have on the dynamics of the whole population in terms of the vital rates and the proportion of nonreproductive individuals, and we provide specific examples for real populations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3934/mbe.2005.2.579 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Germinative dynamic, seasonality, and polyandry: A dive in neotropical point-belly frog reproduction.
Anat Rec (Hoboken)
December 2024
Department of Structural and Functional Biology, Universidade Estadual Paulista "Júlio de Mesquita Filho", São Paulo, Brazil.
Complexity and reproductive plasticity are very well-known characteristics of anurans. The group is being continuously explored taxonomically and phylogenetically, which leads to a great potential diversity not yet uncovered. This is particularly evident due to the lack of investigation regarding species-specific traits, even the ones well distributed in the lineages as polyandry.
View Article and Find Full Text PDFAttenuated sex-related DNA methylation differences in cancer highlight the magnitude bias mediating existing disparities.
Biol Sex Differ
December 2024
State Key Laboratory of Genetic Engineering, School of Life Sciences, Human Phenome Institute, Fudan University, Shanghai, China.
Background: DNA methylation (DNAm) influences both sex differences and cancer development, yet the mechanisms connecting these factors remain unclear.
Methods: Utilizing data from The Cancer Genome Atlas, we conducted a comprehensive analysis of sex-related DNAm effects in nine non-reproductive cancers, compared to paired normal adjacent tissues (NATs), and validated the results using independent datasets. First, we assessed the extent of sex differential DNAm between cancers and NATs to explore how sex-related DNAm differences change in cancerous tissues.
Adult brain neurogenesis does not account for behavioral differences between solitary and social bees.
J Insect Physiol
December 2024
Centre de Recherches sur la Cognition Animale (UMR5169), Centre de Biologie Intégrative, Université de Toulouse, CNRS, UPS, France. Electronic address:
Article Synopsis
- The study examines how group living in social insects affects brain plasticity and behavior, focusing specifically on differences between solitary and eusocial bees.
- It highlights the concept of adult neurogenesis, where new neurons are created and integrated into the brain, as a possible factor influencing behavioral flexibility.
- Contrary to predictions, the research found that the solitary bee Osmia bicornis does not generate new brain cells in adulthood, challenging the assumption that solitary species maintain higher levels of neurogenesis compared to social species like Apis mellifera.
Evaluation of Biochemical Parameters in Sea Turtles.
Vet Sci
November 2024
Centro di Referenza Nazionale sul Benessere, Monitoraggio, Diagnostica delle Malattie delle Tartarughe Marine (C.Re.Ta.M.), Istituto Zooprofilattico Sperimentale della Sicilia "A. Mirri", 90129 Palermo, Italy.
The is the only known sea turtle that nests along the coasts of the Mediterranean Sea. It is considered a vulnerable species by the International Union for Conservation of Nature (IUCN) because it is threatened by human activities. The aim of this work was to analyze biochemical parameters in different age groups of subjects recovered at the Centro di Referenza Nazionale sul Benessere, Monitoraggio e Diagnostica delle Malattie delle Tartarughe Marine (C.
View Article and Find Full Text PDFThe Effects of Adding Hempseed Cake on Sperm Traits, Body Weight, Haematological and Biochemical Parameters in Rabbit Males.
Vet Sci
October 2024
Institute of Farm Animal Genetics and Reproduction, NPPC, Research Institute for Animal Production in Nitra, Hlohovecká 2, 951 41 Lužianky, Slovakia.
Incorporating of agro-industrial co-products into animal nutrition could represent an opportunity to lessen the environmental impact of the food production chain. One such co-product is a hempseed cake originating from cold pressing hemp seeds to extract oil for human consumption. The aim of the present study was to evaluate the action of hempseed cake in the diet on male rabbit reproductive and some non-reproductive indexes.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!