Nigerian port container throughput has increased in the first quarter by 5.7 per cent to 210,057 TEU laden due to investments by the Nigerian Ports Authority (NPA) and terminal operators, said the NPA general manager Michael Ajayi. Vessel traffic surged by 42 per cent to 63,992 units compared to previous year's 45,077 while empty container throughput rose by 18.9 per cent to 161,107 TEU year on year. The concession programme starting in 2006 led to a massive marine improvement in port infrastructure which involved the laying of channel marker buoys, maintenance dredging and the removal of 24 wrecks along the Lagos Channels. Investment…