Early development of the longsnout seahorse Hippocampus reidi (Syngnathidae) within the male brood pouch

Fertilized and unfertilized eggs and embryos of the longsnout seahorse Hippocampus reidi were collected at different stages of development and provided the basis for a description of morphological development from fertilization until release from the paternal pouch. Images of fertilized eggs, as well as their rupture after a few minutes in seawater are reported for the first time. The yolk sac transitioned from ovoid to spherical shape and was reabsorbed progressively until release. The tail began rising from the surface of the deuteroplasm while embryos were in the egg envelope. Embryos lacked a primordial fin fold and developed some species characteristics, such as rays in the dorsal fin, before resorption of the yolk sac. At release, juvenile seahorses were in an advanced stage of development even if they lacked important adult characteristics, such as ring plates and coronet. The tail was not prehensile in juveniles at release; a small caudal fin was present, although this fin is lost in adults.

Development of short-snouted seahorse (Hippocampus hippocampus, L. 1758): osteological and morphological aspects

Information about early development after male release lags behind studies of juveniles and adult seahorses, and newborn seahorses, similar in shape to adults, are considered juveniles or fry. During early life, Hippocampus hippocampus present behavioural (shift in habitat, from planktonic to benthic) and morphological changes; for this reasons, the aims of this study are to define the stage of development of H. hippocampus after they are expelled from the male brood pouch and to establish direct or indirect development through an osteological analysis. The ossification process was studied in 120 individuals, from their release to 30 days after birth. To analyse the osteological development, Alcian Blue-Alizarin Red double staining technique for bone and cartilage was adapted to this species. At birth, H. hippocampus presents a mainly cartilaginous structure that ossifies in approximately 1 month. The bony armour composed of bony rings and plates develops in 10 days. The caudal fin, a structure absent in juveniles and adult seahorses, is present at birth and progressively disappears with age. The absence of adult osteological structure in newborns, like coronet, bony rings and plates, head spines and components allowing tail prehensile abilities, suggests a metamorphosis before the juvenile stage. During the indirect development, the metamorphic stage started inside brood pouch and followed outside and leads up to reconsider the status of H. hippocampus newborns.

Development of seahorse (Hippocampus reidi, Ginsburg 1933): histological and histochemical study

Biological aspects and global demand for aquarium promote seahorses as new species with high potential for commercial purposes; however, the low newborn survival rate represents the main bottleneck of seahorses farming. In this study, the organogenesis of the Hippocampus reidi was analysed from release until the 30th day after birth, using histological and histochemical approaches. To study the stages of their early life, 360 individuals were killed, sectioned, and stained with haematoxylin and eosin, periodic acid-Schiff, and Sudan Black B techniques. At birth, mouth and anus were open, the swim bladder inflated, and the visual system highly developed. Among the results, it was emphasized the presence of the yolk sac until the 2nd day after birth, the loops of the intestine to accommodate its elongation, and the ability of the larvae to absorb lipids in the anterior and posterior tract of the intestine. A short time (7/8 days) between reabsorption of yolk sac and formation of gonads was registered, with primordial follicles visible from the 10th day after birth. For the first time, organogenesis in H. reidi was described in detail; seahorses underwent a marked metamorphosis, and the indirect development observed in this species lead up to reconsider the term "juvenile" used for H. reidi during this period.

Quality of life impact as outcome in burns patients

PURPOSE

Severe burns have not only physical but also psychological consequences both during and after hospitalisation. By identifying the mainly impaired areas of a patient's quality of life (QoL), specific psychological support programmes can be provided. The assessment of subjectively perceived QoL impairment can also provide an indicator of the outcome of the medical and psychological treatment.

METHOD

This study used the Sickness Impact Profile (SIP) to investigate QoL in 30 burned patients after discharge and again three months' later.

RESULTS

At the first assessment, both the physical and psychological dimensions were significantly impaired, although there was an improvement at the 3-month follow-up, particularly in the physical dimension. Data suggest that there are QoL areas that appear to be compromised in burn patients. Even after hospital discharge, the burn injury causes major limitations that extend well beyond the physical area and involve emotional, social and relational aspects. Nevertheless, most of the categories in the physical dimension tend to improve during follow-up and, three months after the first administration, the predominant limitations are in emotional behaviour and sleep and rest in the psychosocial dimension. The SIP score matched for depth and extent of burns show that females were in poorer health than males. At the first administration, gender-related differences were particularly marked in Ambulation (p = .005), Body Care and Movement (p = .004), Home Management (p = .013), Mobility (p = .011), Physical Dimension (p = .004) and the QoL general score (p = .031). Although all of these areas had improved by the time of the retest, the gender-related differences remained. The categories assessed with the Psychosocial Dimension of SIP did not correlate with the clinical parameters of the burn, whereas those pertaining to the Physical Dimension did.

CONCLUSION

Multidisciplinary support for burn patients appears to be necessary even many months after hospital discharge.