Evolución de la maduración gonadal de ejemplares de Seriola dumerilli mantenidos en cautividad

[EN]The present work describes the evolution of Seriolla dumerilli stock in the Instituto Canario de Ciencias Marinas from year 2006 to 2009. Nine sub adults of kingfish were captured by local fisherman in the south coast of Gran Canaria in may 2006, fish were transported in a truck and transferred to on land facilities. Adaptation to tanks and inert food was successfully carried out one month after the capture. After 3 year kept in captivity 100% survival was obtained. Initial fish weight (1,66kg), was increased over to 8,0 kg nowadays. Every year fish were sampled to determine individual growth in weight and size. In addition, the evolution of its sexual maturity state was established by ovarian biopsy. Oocites over 500 microns were observed in year 2008 in one of the females with an average weight of 3,8kg. In year 2009, mature fish were observed, but natural spawn was unsuccessful, however the use of hormonal injection (LHRH) results in two successful spawn with around 0,5 millions eggs (99% unfertilized eggs).

Maduración y obtención de puestas de Seriola rivoliana en Canarias

The almaco jack Seriola rivoliana belongs to the Carangidae family of fishes. These species are an important resource for recreational and commercial fisheries worldwide. Among other attributes, almaco jack has being identified as potentially aquaculture species due to their fast growth, excellent flesh quality and significant market opportunities internationally. The present work describes the establishment of broodstock of Seriola rivoliana in the Instituto Canario de Ciencias Marinas from year 2006 to 2009 and subsequent maturation and spawning. Twenty sub adults were captured by local fisherman in the South coast of Gran Canaria in may 2006. Adaptation to culture conditions in tanks and inert food was successfully carried out just after one moth of capture. Initial fish weight (1,76± 0,25kg), was increased to 6,0±1,1kg in july 2009. Every year fish were sampled to determine individual growth in weight and size. In addition, the evolution of its sexual maturity state was established by gonadal biopsy. In July 2009, the use of hormonal injection (LHRH) results in two successful spawns with 42% of viable eggs.

Metachronic malignant transformation of small bowel and rectal endometriosis in the same patient

[ES] Background: Malignant transformation of intestinal endometriosis is a rare event with an unknown rate of incidence. Metachronous progression of endometriosis to adenocarcinoma from two distant intestinal foci happening in the same patient has not been previously reported. Case presentation: We describe a case of metachronic transformation of ileal and rectal endometriosis into an adenocarcinoma occurring in a 45-year-old female without macroscopic pelvic involvement of her endometriosis. First, a right colectomy was performed due to intestinal obstruction by an ileal mass. Pathological examination revealed an ileal endometrioid adenocarcinoma and contiguous microscopic endometriotic foci. Twenty months later, a rectal mass was discovered. An endoscopic biopsy revealed an adenocarcinoma. En bloc anterior rectum resection, hysterectomy and bilateral salpingectomy were performed. A second endometrioid adenocarcinoma arising from a focus of endometriosis within the wall of the rectum was diagnosed. Conclusion: Intestinal endometriosis should be considered a premalignant condition in premenopausal women.