several provincial parks provide camping, bird watching, and hiking. The development of aquaculture has supplemented the fisheries with hatcheries that produce salmon, trout, mussels, and oysters. Such programs support the provision of economic infrastructure, such as in transportation and research, and have contributed substantially to the development of up-to-date amenities and services comparable to those found elsewhere in Canada. Deciduous stands, especially along the river valleys, consist of sugar and red maple, trembling aspen, and yellow and white birch. After early problems of adjustment the loyalist communities of New Brunswick began to prosper. New Brunswick has a roughly rectangular shape, about 210 miles (340 km) from north to south and 185 miles (300 km) from east to west.