Anthony J. Booth

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Sectioned otoliths were used for age and growth determination of Oreochromis macrochir, a common cichlid species from the Okavango Delta, Botswana. The Okavango Delta is a vast inland wetland ecosystem which receives annual floodwaters from the highlands of southern Angola. Floodwaters reach the northern areas of the delta between January and March and the(More)
Sharptooth catfish Clarias gariepinus was introduced into the Eastern Cape Province, South Africa, in 1976 and there are concerns about its possible negative impacts on native biota. This study investigated its trophic impact by examining its feeding habits. Stomach content and stable isotope analyses were compared from three localities—the Great Fish(More)
Otoliths and scales were used for age and growth determination ofOreochromis andersonii from the Okavango Delta, Botswana. Marginal increment analysis showed that an annulus was formed in both the scales and otoliths during the dry summer period. Using scales, the growth ofO. andersonii was described by Lt = 285.27(1-e-0.26(t+2.02)) mm SL and using otoliths(More)
Salmon poisoning disease in dogs has previously been reported in North America only along the western coast of the U.S.A. This paper presents the findings from eight affected dogs recently diagnosed on Vancouver Island, Canada. The clinical signs shown by these dogs were lethargy, anorexia, pyrexia and lymph node enlargement. The causative agent,(More)
Despite increasing awareness of large-scale climate-driven distribution shifts in the marine environment, no study has linked rapid ocean warming to a shift in distribution and consequent hybridization of a marine fish species. This study describes rapid warming (0.8 °C per decade) in the coastal waters of the Angola-Benguela Frontal Zone over the last(More)
Aspects of the life history of Labeo cylindricus in Lake Chicamba, a man made hydroelectric dam in central Mozambique were investigated. L. cylindricus was found to be a potadrometic, synchronous spawner concentrating in river mouths prior to migrating up flowing rivers in January to spawn. Length-at-(50%)-maturity was attained at a fork length (FL) of 96(More)
Three cases of injury to the spleen in children are presented. The value of ultrasound in the diagnosis and monitoring of treatment of such splenic injuries is described, and the importance of free peritoneal fluid is stressed. Since splenectomy disturbs the immune mechanisms of the body, treatment should, if possible, be medical.
Rotavirus is a major cause of acute, community-acquired gastroenteritis in infants and young children but its importance in healthcare-associated paediatric gastroenteritis is much less well understood. A prospective study was undertaken at the Royal Liverpool Children's NHS Trust, Liverpool, UK. We enrolled 243 children with acute gastroenteritis (AGE) who(More)
This study applied ecological niche models to determine the potential invasive range of Nile tilapia, Oreochromis niloticus, with a particular focus on river systems in southern Africa where it is now established and spreading. Computational tools such as niche models are useful in predicting the potential range of invasive species, but there are(More)
In aquatic ecosystems, impacts by invasive introduced fish can be likened to press disturbances that persistently influence communities. This study examined invasion disturbances by determining the relationship between non-native sharptooth catfish Clarias gariepinus and aquatic macroinvertebrates in the Eastern Cape, South Africa. A Multiple Before–After(More)