Complex sentence: These include high mortality due to stress during transport from nursery tanks or inshore cages out to grow-out cages, along with diseases during nursery and growout culture resulting in low survival, and consequently poor harvest.
Split into simpler sentences: These include high mortality due to stress during transport from nursery tanks or inshore cages out to grow-out cages. Also diseases during nursery and growout culture can result in low survival, and consequently poor harvest.