Photos
Aucune photo sur cette plongée
-
Temp: Surf 25°C Fond 27°C
-
Type de plongée : Loisir, Entrainement, Épave
-
Visibilité : Moyenne
Type d'eau Salée
Equipement particulier utilisé
Récemment sur Brambles Reef
Données fournies par EOL.org
Espèces identifiées
Triaenodon obesus (Rüppell, 1837) (Whitetip reef shark)
Despite its docile nature during the day this nocturnal shark can become aggressive when hunting at night, thrashing through coral reefs looking for potential prey. The whitetip reef shark usually hunts alone, but is n...
Lire la suite
Despite its docile nature during the day this nocturnal shark can become aggressive when hunting at night, thrashing through coral reefs looking for potential prey. The whitetip reef shark usually hunts alone, but is non-territorial and will occasionally work in cooperation with others in the pursuit of prey . Feeding primarily on bottom-dwelling octopus, lobsters, crabs and bony fish, it often chases its prey into a crevice before jamming its body in after it, sealing the exit . The extremely posterior location of the first dorsal fin compared to those of other sharks is an adaptation to this feeding habit, which allows them to get their heads and mouths much further into the gaps and holes in the coral . The whitetip reef shark's mating season varies with location . Reproduction is viviparous and after a gestation period of around a year the female will give birth to one to five live pups, which are completely independent at birth . Both sexes reach sexual maturity at approximately 5 years old, and it is estimated that this species can live to an age of 25 years .
Chelonia mydas Linnaeus 1758 (Green Turtle)
Green turtles are long-lived and may take up to 59 years to reach sexual maturity Undertaking tremendous feats of navigation, adults return to the same beach to breed each season, part of the population in Brazil asto...
Lire la suite
Green turtles are long-lived and may take up to 59 years to reach sexual maturity Undertaking tremendous feats of navigation, adults return to the same beach to breed each season, part of the population in Brazil astonishingly migrates around 2,250 kilometres across the open ocean to breed on the Ascension Islands . Mating tends to occur just offshore of the nesting beaches; using a curved claw on each front flipper and a flat nail at the end of the tail, males are able to grip their mates . Females haul out onto the beach at night and dig large nests with their back flippers beyond the high tide mark, they typically lay between 100 and 150 eggs in one nest and then proceed to cover the eggs with sand; the whole process takes around two hours . A single female returns to breed only once every two to five years but will lay up to nine nests in that one season . Incubation takes between 45 and 70 days, and temperature has been shown to determine of the sex of hatchlings; with females being produced at warmer temperatures . Breaking open their eggs with a special hooked 'egg tooth' that will subsequently be lost; hatchlings use their powerful front flippers to reach the surface, and then proceed to the sea . The soft-bodied juveniles are particularly vulnerable at this time from a variety of predators, such as ghost crabs and gulls on the beach to sharks and dolphins in the water . Unlike other marine turtles, adult green turtles are almost exclusively herbivorous, grazing on seagrasses and algae ; it is assumed that juveniles are more omnivorous although the exact composition of their diet is unknown
Partager sur les Réseaux Sociaux
Lien direct vers cette plongée
Toutes les informations de cette plongée seront définitivement supprimées (profil de plongée, notes, espèces, photos,...) Êtes-vous certain ?
Vous devez sélectionner au moins une plongée à importer sur Diveboard
Cette plongée va être copiée dans votre carnet de plongée.
Veuillez indiquer quels infos vous souhaitez conserver.
Cette plongée a été copiée dans votre carnet de plongée.
Diveboard participe aujourd'hui au concours de startups Techcrunch Disrupt. Montrez que vous aimez Diveboard en votant pour nous !
Un seul clic est nécessaire !
Cette fenêtre ne s'affichera qu'une seule fois. N'oubliez pas de voter avant de la fermer ! Merci !
Matthias
Australie
Date : 2012-04-29 - 09:56
Profondeur Max: 18.8m Durée : 58mins
