Egg-laying behavior is one of the most important aspects of female behavior, and has a profound impact on the fitness of a species. As such, it is controlled by several layers of regulation. Here, we review recent advances in our understanding of insect neural circuits that control when, where and how to lay an egg. We also outline outstanding open questions about the control of egg-laying decisions, and speculate on the possible neural underpinnings that can drive the diversification of oviposition behaviors through evolution.
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http://dx.doi.org/10.1080/01677063.2019.1586898 | DOI Listing |
J Evol Biol
January 2025
School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.
In ovipositing animals, egg placement decisions can be key determinants of offspring survival. One oviposition strategy reported across taxa is laying eggs in clusters. In some species, mothers provision eggs with diffusible defence compounds, such as antimicrobials, raising the possibility of public good benefits arising from egg clustering.
View Article and Find Full Text PDFPoult Sci
December 2024
Department of Animal Bioscience, University of Guelph, Guelph, Ontario N1G 2W1, Canada. Electronic address:
The objective of this study was to evaluate the impact of feeding broiler breeders hydroxychloride and organic sources of zinc (Zn), copper (Cu), and manganese (Mn) on hatching eggs, embryo, and hatchlings attributes. A total of 408 female (♀) and 48 male (♂) Ross 708 broiler breeder were placed (17 ♀ and 2 ♂/pen). The pens were housed in two rooms (12 pens/room).
View Article and Find Full Text PDFPoult Sci
December 2024
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, Canada T6G 2P5.
This study aimed to determine the effects of dietary ME and BW restriction on layer pullet sexual maturation, carcass composition and reproductive organs. Two trials were conducted: a precision feeding (PF) (Experiment 1) and a conventional (CON) experiment (Experiment 2). Experiment 1 was a 2 × 4 factorial arrangement with two feed allocation (FA) levels: meal every visit (MEV) or restricted to the lower limit of Lohmann Brown-Lite recommended BW; and three dietary ME levels: Low, Standard (Std), and High (2,600, 2,800, and 3,000 kcal/kg, respectively); the fourth treatment enabled birds to choose from the three diets (Choice).
View Article and Find Full Text PDFSyst Biol
December 2024
Programa de Pós-Graduação em Ecologia e Evolução, Universidade Federal de São Paulo, Rua Sena Madureira, 1500 - Vila Clementino, Diadema - SP, 04021-001, Brazil.
Comparative research on the evolution of parental care has followed a general trend in recent years, with researchers gathering data on clutch size or egg size and correlating these traits with ecological variables across a phylogeny. The goal of these studies is to shed light on how and why certain strategies evolve. However, results vary across studies, and we rarely have results explaining why the observed pattern occurred, leaving us with further hypotheses to test.
View Article and Find Full Text PDFFood Funct
January 2025
Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, USA.
Objective biomarkers of food intake are a sought-after goal in nutrition research. Most biomarker development to date has focused on metabolites detected in blood, urine, skin, or hair, but detection of consumed foods in stool has also been shown to be possible DNA sequencing. An additional food macromolecule in stool that harbors sequence information is protein.
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