Larval abundances were significantly greater in modified estuaries, and there were trends towards greater diversity in these systems. Larval fish communities were sampled using a benthic sled within the inner and outer zones of three heavily modified and three relatively unmodified estuaries. We investigated links between the large-scale distribution of stressors and larval fish assemblages in estuarine environments. Correlations between habitat modification, contamination and marine larval fish communities have rarely been assessed in situ. [Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales 2052 (Australia)Ĭhanges to larval fish assemblages may have far reaching ecological impacts. McKinley, Andrew C., E-mail: [Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, New South Wales 2052 (Australia) Miskiewicz, Anthony [Environment and Recreation, Wollongong City Council, 41 Burelli Street, Wollongong, New South Wales 2500 (Australia) Taylor, Matthew D. Strong links between metal contamination, habitat modification and estuarine larval fish distributionsĮnergy Technology Data Exchange (ETDEWEB) Similar to laboratory results, field experiments showed that oyster larval settlement in " larval housings" suspended above oyster reefs was significantly higher compared with off-reef sites. Clam larval settlement did not vary according to sound treatments. Oyster larval settlement in the laboratory was significantly higher when exposed to oyster reef sound compared with either off-reef or no-sound treatments. We quantified the effects of habitat-associated sounds on the settlement response of two species of bivalves with contrasting habitat preferences: (1) Crassostrea virginicia (oyster), which prefers to settle on other oysters, and (2) Mercenaria mercenaria (clam), which settles on unstructured habitats. Soundscapes and Larval Settlement: Larval Bivalve Responses to Habitat-Associated Underwater Sounds.Įggleston, David B Lillis, Ashlee Bohnenstiehl, DelWayne R When habitat stability and habitat types were considered, hoof print were the most productive followed by disused goldmines.These findings suggest that implementation of effective larval control programme should be targeted with larval Significantly higher anopheline larval abundance was recorded in habitats in pasture compared to farmland (P = 0.002. Crop weeding significantly influenced with the abundance of An.gambiae s.l (P≤0.001 when preceded with fertilizer application. The number of predator species influenced mosquito larval abundance in different habitat types. Further, larval species abundance was influenced by crop cycle (P≤0.001, grass cover (P≤0.001, while distance to nearest houses significantly influenced the abundance of mosquito species larvae (r = 0.920 P≤0.001. Physico-chemical parameters and habitat size significantly influenced abundance of An. gambiae s.l was the most dominant vector species comprised of An.gambiae s.s (77.60% and An.arabiensis (18.34%, the remaining 4.06% had no amplification by polymerase chain reaction. Polymerase chain reaction revealed that An. Mosquito larval species, physico-chemical parameters, habitat size, grass cover, crop cycle and distance to nearest house were recorded. This study investigated larval habitat succession and ecological parameters which influence larval abundance in malaria epidemic prone areas of western Kenya.A total of 51 aquatic habitats positive for anopheline larvae were surveyed and visited once a week for a period of 85 weeks in succession. Understanding larval habitat succession and its ecology in different land use managements and cropping systems can give an insight for effective larval source management practices. Anopheline larval habitats seasonality and species distribution: a prerequisite for effective targeted larval habitats control programmes.ĭirectory of Open Access Journals (Sweden)įull Text Available Larval control is of paramount importance in the reduction of malaria vector abundance and subsequent disease transmission reduction.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |