Changes in behaviour during the inter-nesting period and post-nesting migration for Ascension Island green turtles

Abstract

Satellite transmitters were attached to green turtles Chelonia mydas while they were nesting on Ascension Island in the South Atlantic (7"57'S, 14"22'W) and individuals were subsequently monitored during the inter-nesting period and the post-nesting migration to Brazil. During the inter-nesting period, data from the transmitters suggested that turtles generally stayed within 5 km of the nesting beach on which they had originally been observed. During both the inter-nesting period and migration, turtles were submerged the vast majority (>95%) of the tune, suggesting that they neither basked at the surface nor drifted passively during migration to any great extent. There was a clear dichotomy in submergence behaviour, with submergences tending to be of short duration during postnesting migration (mean = 7.3 rnin, 3318 h of data from 5 individuals) and of longer duration during the inter-nesting period (mean = 22.1 min, 714 h of data from 5 different in&viduals). As submergence duration is generally linked to activity levels in sea turtles, this pattern suggests that turtles were comparatively inactive during the inter-nesting period and comparatively active dunng migration. During both the inter-nesting period and the post-nesting migration, die1 submergence patterns were detected with dive duration tending to be longer at night. As the turtles migrated WSW from Ascension Island, there was a reduction in their speed of travel. A numerical model of the near-surface currents suggested that this reduction was associated with the weakening of the WSW flow of the prevailing South Atlantic Equatorial Current.

Nesting behaviour of the Green turtle at Kosgoda rookery, Sri Lanka

“…The inter-nesting period of the Tortuguero green turtles was 8 to 33 days (Troeng and Rankin, 2005). During the inter-nesting period, female turtles mainly rest and they may feed only if there are foraging grounds close to the nesting beach (Hays et al, 1999;. When a female turtle arrives at a nesting area she carries a full set of follicles to supply yolk for all the eggs she will lay during the season (Miller, 1997).…”

Movements of Kemp’s ridley sea turtles nesting on the upper Texas coast: implications for management

“…Satellite tracking has been utilized to document extended post-nesting movements, such as those of leatherback turtles Dermochelys coriacea spanning the Atlantic (James et al 2005) and Pacific Oceans (Benson et al 2007), as well as more localized internesting movements (e.g. olive ridleys: Plotkin 1998; loggerheads: Stoneburner 1982, Godley et al 2003; green turtles: Hays et al 1999, Troëng et al 2005b; and hawksbill turtles Eretmochelys imbricata: Troëng et al 2005a, Whiting et al 2006.…”

Influence of physical activity on students physical self-concept and satisfaction with life: Physical and non-physical education students perspective

“…For each of the 11 dimensions a mean score was calculated along a continuous scale varying from 1 (Strongly disagree) to 6 (Strongly agree), with a low value representing negative and a high value representing positive self-perception. The scoring for the negatively worded items 8,11,17,19,22,25,29,30,33,39,46, and 47 was reversed. The scale has acceptable validity, reliability (coefficient alpha at least 0.80).…”