Development and growth of Planigale tenuirostris (Marsupialia: Dasyuridae) in the laboratory.

Abstract

Development and growth of Planigale tenuirostris are described with data for three litters bred in the laboratory. Growth curves were constructed for the length of head plus body, tail, head and foot; the width of head and scrotum and the body weight for the period from birth to 200 days old. A regression equation is given that predicts age during the first 30 days of life. The young of P. tenuirostris first detached from the teats at 36 days, had their eyes open at 51 days and were weaned at 95 days. Field data on development are in agreement with those for the laboratory individuals. Features of development, growth and maternal nesting behaviour are compared with those known for other small dasyurids.