Tuesday, March 2, 2010

Threats on sea turtles

Threats:
- continuing loss of nesting habitat & environmental damages from structure building

- tourist use of beaches result in disturbance to nesting turtles
(Egg laying can be aborted or delayed as well)

- Artificial lighting has negative effects on nesting behaviour and success
(turtles can mistakenly move inland after egg laying)

- practice of adding sand onto a beach to rebuild affects turtles by direct burial of nests

- mechanical equipment for beach cleaning that result compacted beaches that are difficult for nesting

- predators
main: Homo sapiens
others: raccoons, sharks, gulls, foxes, snakes.....)

- dirty environment
(rubbish in sea or land, oil and gas)

reference:

Saturday, February 27, 2010

Further Research

Nesting process + Hatching

Digging hole to nest
http://www.youtube.com/watch?v=ZWOd0RRK0HM
http://www.youtube.com/watch?v=25nC4WVU-bQ

Nesting
http://www.youtube.com/watch?v=eJP3RxzuHCo&feature=related

After nesting
http://www.youtube.com/watch?v=VtxpXoDTldk

Hatching
http://www.youtube.com/watch?v=Tl3yYd-4Rws
http://www.youtube.com/watch?v=E2guUpDYRug&feature=related

Turtles





Hawksbill Turtle Research

Description:
-Juveniles are black or very dark brown with light brown or yellow coloration on the edge of the shell, limbs, and raised ridges of the carapace
-adults more commonly average about 2½ feet in length (<1 m)
-shell is thin
-flexible
-highly colored with elaborate patterns
-thick & posteriorly overlapping scutes on the carapace
-narrow pointed beak reminiscent of a bird of prey
-four pairs of costal scutes
-weighing 40-60 kg
-streaked and marbled with amber, yellow or brown

Habitat
-uses different habitats at different stages of their life cycle
-shelter in weedlines around convergence zones
-post hatching hawksbills are pelagic (sea floor)
-sargassum and floating debris such as Styrofoam, tar balls, and plastic bits serve as a habitat for Hawksbill
-when they reach about 20-25 cm carapace length Hawksbills reenter coastal waters
-ledges and caves of reef systems provide these turtles with shelter for resting
-can be found rocky areas, coral reefs, shallow coastal areas, lagoons or oceanic islands, and narrow creeks and passes
-seldom seen in water deeper than 65 feet
-Adult females are able to climb over reefs and rocks to nest in beach vegetation

Reproduction
-6 month nesting season (longer than that of other sea turtles)
-nest on average 4.5 times a season and intervals of about 14 days
-Eggs are about 40 mm in diameter and take about 60 days to hatch
-sex determination is likely temperature-dependent

Diet
-adapted for getting food from crevices in coral reefs
-sponges, tunicates, shrimps, and squids


Reference

Friday, February 12, 2010

Ideation on Improvise

Sketches

Sketch 3
Sketch 2
Sketch 1

Fonts use is Harrington
Layout used is scroll with a little edit on layout



Ideation on Fonts and Layout




Sign In Layout


Suggestion to improvise the layout:
-changing layout but background remain
-remove icons
-rearrange words in hierarchy way
-change font