back swimmer meaning in Hindi

Examples

1. Peirsol, one of the most laid-back swimmers here and a Southern California native, is a crowd favorite.
2. They are similar to " Notonecta glauca ", the water boatman or back swimmer by appearance, although these lesser waterboatman are herbivores and swim on their fronts.
3. The abundance of invertebrates such as gnat larvae ( chironomids ) and back swimmers ( Trichocorixa ) are fed upon extensively by the huge shorebird and waterfowl populations that utilize the lake.
4. They are not related to " Notonecta glauca ", the water boatman or back swimmer, nor to the European " Micronecta scholtzi ", also known as the " lesser water boatman ".
5. Long lasting air layers also occur in aquatic arthropods which breathe via a physical gill ( plastron ) e . g . the water spider ( " Argyroneta " ) and the saucer bug ( " Aphelocheirus " ) Air layers are presumably also conductive to the reduction of friction in fast moving animals under water, as is the case for the back swimmer " Notonecta ".