Maintenance and breeding of Thrichomys (Trouessart, 1880) (Rodentia: Echimyidae) in captivity

South American histricognath rodents Thrichomys apereoides laurentius and Thrichomys pachyurus are natural hosts of Trypanosoma cruzi, agent of Chagas disease. We established breeding colonies of these species to serve as experimental models in various parasitological studies. Both species of Thrichomys have all the requirements necessary to become excellent laboratory models: they can be easily maintained in the standard laboratory conditions and breed throughout the year and they do not have any special dietary demands and can be fed by standard food pellets designed for laboratory mice. Both species produce precocious offspring that have their eyes and ears open, teeth erupted, fur well developed, and can eat solid food in the first week of life. T. a. laurentius has larger litter sizes and lower body masses at birth and weaning than T. pachyurus. Moreover, females of T. a. laurentius reach puberty earlier and with lower body mass than T. pachyurus.

Effect of food on immature development, consumption rate, and relative growth rate of Toxorhynchites splendens (Diptera: Culicidae), a predator of container breeding mosquitoes

Food utilization by the larvae of Toxorhynchites splendens (Wiedemann) was studied in the laboratory by offering larvae of Aedes aegypti Linnaeus, Anopheles stephensi (Liston), and Culex quinquefasciatus (Say). Quantitative analyses of data indicated that immature development was significantly faster with increase in food availability. The regression analysis showed that the degrees of the relationship between immature duration (Id) and food availability were higher when offered early instars of prey (first and second instars) than late instars. Consumption rate (Cr) of the predator increased with increase in food availability and this relationship was highly significant when larvae of An. stephensi were offered as food. Consumption rate to food level decreased with increase in the age class of the prey. There was a significant negative correlation between Id and Cr. This aspect helps to increase population turnover of T. splendens in a shorter period when the prey is abundant. Conversely, the predator compensated the loss in daily food intake at low food level by extending Id thereby attains the minimum threshold pupal weight for adult emergence. There was an increase in the relative growth rate (RGR) of the predator when An. stephensi was offered as prey and this was related to the high protein content of the prey per body weight. There was a positive correlation between Cr and RGR. This adaptive life characteristic strategy of this predator is useful for mass-rearing for large scale field release programmes in the control of container breeding mosquitoes is discussed.

'Good-genes' and 'compatible-genes' effects in an Alpine whitefish and the information content of breeding tubercles over the course of the spawning season.

Some models of sexual selection predict that individuals vary in their genetic quality and reveal some of this variation in their secondary sexual characteristics. Alpine whitefish (Coregonus sp.) develop breeding tubercles shortly before their spawning season. These tubercles are epidermal structures that are distributed regularly along the body sides of both males and females. There is still much unexplained variation in the size of breeding tubercles within both sexes and with much overlap between the sexes. It has been suggested that breeding tubercles function to maintain body contact between the mating partners during spawning, act as weapons for defence of spawning territories, or are sexual signals that reveal aspects of genetic quality. We took two samples of whitefish from their spawning place, one at the beginning and one around the peak of spawning season. We found that females have on average smaller breeding tubercles than males, and that tubercle size partly reveals the stage of gonad maturation. Two independent full-factorial breeding experiments revealed that embryo mortality was significantly influenced by male and female effects. This finding demonstrates that the males differed in their genetic quality (because offspring get nothing but genes from their fathers). Tubercle size was negatively linked to some aspects of embryo mortality in the first breeding experiment but not significantly so in the second. This lack of consistency adds to inconsistent results that were reported before and suggests that (i) some aspects of genetic quality are not revealed in breeding tubercles while others are, or (ii) individuals vary in their signaling strategies and the information content of breeding tubercles is not always reliable. Moreover, the fact that female whitefish have breeding tubercles of significant size while males seem to have few reasons to be choosy suggests that the tubercles might also serve some functions that are not linked to sexual signaling.

Information for parents on the work of NICORE

This leaflet describes the work of NICORE (Neonatal Intensive Care Outcomes Research and Evaluations), highlighting the importance of the data collected on each baby admitted to neonatal intensive care and how NICORE contributes to improved standards of care.

Rotavirus factsheet for parents (Immunisation)

This factsheet provides information for parents on the rotavirus vaccine given to babies at two and three months old from July 2013. This is more detailed than the information contained in the leaflet Immunisation for babies up to a year old.

Healthy child, healthy future - Speech and language therapy: Factsheet for parents 3. Talk to your child in your own language

This factsheet encourages non-English speaking parents to talk to their children in their own language.

Healthy child, health future - Speech and language therapy: Factsheet for parents 2. Helping your young non-fluent child

This factsheet outlines how parents can help their child speak more fluently, without stammering.

Healthy child, healthy future - Speech and language therapy: Factsheet for parents 6. Tips for talking: children aged 4 to 5 years

This factsheet highlights simple ideas to encourage speech in children around 4 to 5 years old.

Healthy child, healthy future - Speech and language therapy: Factsheet for parents 1. Does my child speak clearly?

This factsheet describes how parents can help their child speak more clearly.

Healthy child, healthy future - Speech and language therapy: Factsheet for parents 5. Does my child have a voice problem?

This factsheet describes voice disorders such as 'hoarseness' in children and what parents can do to help their child with a voice problem.

Healthy child, healthy future - Speech and language therapy: Factsheet for parents 4. Dummies and talking

This factsheet gives advice to parents on the use of dummies and their effect on a child's speech.

Beating cervical cancer. The HPV vaccine - questions and answers for parents of girls in Year 9 (English and eight translations)

This leaflet provides more detailed information in a question and answer format about the HPV vaccine offered to girls in Year 9 which can help protect against cervical cancer.

Teeth matter! Caring for your children's teeth: advice for parents and carers of children with special needs

This booklet explains how to care for the teeth of children with special needs.

Drugs and solvents: a guide for parents

This booklet provides information on why young people try drugs, the risks of taking illegal drugs, the signs of drug taking and information about individual drugs.�

Healthy choices. Choose wisely: Advice for parents

This booklet shows how parents and carers of primary school children can choose food from the different food groups to make sure their family is getting all the nutrients they need to stay healthy.