During mid-adolescence, females exhibit vaginal opening and irregular ovarian cycling, whilst testosterone levels continue to rise in males (Gabriel et al., 1992), and wild rats follow the mother on foraging trips away from the burrow at this age (Calhoun, 1963).
The burrows on the top of the wood were longer than the burrows at the bottom (with mean lengths of 2.6 cm and 1.2 cm, respectively).
In the early '70s, short sections of the Second Avenue tunnel were burrowed at the foot of the Manhattan Bridge, between 99th Street and 105th and between 110th and 120th, before the city's looming bankruptcy in 1975 halted all digging.
Mr Hampshire said the figures were based on counting the number of burrows at the 444 acre (180 hectare) site.
In simulations, Uca pugnax burrows at the ponded marsh were assumed to reach a mean depth of only 15 cm, compared to 20 cm at the creek bank.
Juergens found sand termites or their burrows at the vast majority of fairy circles that he investigated, he reports online today in Science.
(C) Bioirrigation coefficients (s-1) as a function of depth at Sapelo Island calculated for dissolved SO4-2 with correction for solute depletion within burrows at the creek bank (green) or ponded marsh (black) and without correction for solute depletion at the creek bank (blue) and ponded marsh (purple).
Rodent burrows at the campgrounds were dusted with a flea insecticide to kill any remnants of plague.
It zeroes in on an impulse that yearns to be pure, uncompromising and compensatory, finding the nasty worm of entitlement and exploitation that's burrowed at the heart.
Spadefoot toads are "explosive breeders", all emerging from their burrows at the same time and converging on temporary pools, attracted to one of these by the calling of the first male to find a suitable breeding location.
