Indian Ocean

The Spatial Ecology of Juvenile Loggerhead Turtles (Caretta caretta) in the Indian Ocean Sheds Light on the “lost years” Mystery

While our understanding of the early oceanic developmental stage of sea turtles has improved markedly over recent decades, the spatial context for this life history stage remains unknown for Indian Ocean loggerhead turtle populations. To address this gap in our knowledge, 18 juvenile loggerheads were satellite tracked from Reunion Island (21.2°S, 55.3°E) between 2007 and 2011. Nine turtles swam north toward Oman (20.5°N, 58.8°E), where one of the world’s largest rookeries of loggerheads is located.

14 September 2018

Sea turtles of the Cocos (Keeling) Islands, Indian Ocean.

The Cocos (Keeling) Islands support high density resident green and hawksbill turtles and low to moderate density nesting green turtles. Dedicated studies were conducted on resident foraging turtles of the southern atoll between 1999 and 2012 and opportunistic observations were conducted on nesting turtles on both atolls between 1999 and 2009. In-water capture surveys resulted in a species composition of 51% green and 49% hawksbill turtles while counts during boat-based strip transect surveys resulted in a composition of 93% and 7% respectively.

14 September 2018

Implications of Juvenile Green Turtle (Chelonia mydas) Sightings Along the East Coast of India

Information on sea turtles is generally limited to breeding individuals and hatchlings monitored on nesting beaches. The life stages between hatchling and adult are difficult to observe and are referred to as the “lost years” (Carr et al. 1978). However, research regarding diet, population density and population viability has been conducted to better understand juvenile life stages (Maffucci et al. 2013; Witherington et al. 2012) and so, no more are those years as “lost” to knowledge as they were before.

14 September 2018

A Summary of Sea Turtle Genetic Studies in the Indian Ocean and Southeast

Our summary has compiled available information about genetics of nesting and in-water sea turtle populations in the Indian Ocean and Southeast Asia so that others interested in this field of research might easily identify areas requiring further investigation. We have also identified studies with contradictory results that would benefit from additional investigation.

14 September 2018

Global Distribution of Two Fungal Pathogens Threatening Endangered Sea Turtles

Nascent fungal infections are currently considered as one of the main threats for biodiversity and ecosystem health, and have driven several animal species into critical risk of extinction. Sea turtles are one of the most endangered groups of animals and only seven species have survived to date. Here, we described two pathogenic species, i.e., Fusarium falciforme and Fusarium keratoplasticum, that are globally distributed in major turtle nesting areas for six sea turtle species and that are implicated in low hatch success.

13 September 2018

Genetic diversity and phylogeography of hawksbill turtle in the Persian Gulf

Genetic diversity and phylogeography of Hawksbill sea turtle was studied by using sequencing of the mitochondrial DNA (D-loop and tRNA pro region). 45 dead embryos were collected from the Qeshm (25 samples) and Kish Islands (20 samples) in the Persian Gulf. Analysis of sequence diversity showed over 890 bp of the mtDNA D-loop and tRNA pro region revealed 5 polymorphism sites and 7 haplotypes. Two new haplotypes were submitted on NCBI gene bank as Iran3 with GU997696 accession number and Iran7 with JN627023 accession number.

13 September 2018

Study: Conservation Priorities for Shark and Ray Species included and proposed for inclusion in Annex 1 to the CMS Sharks MOU

The Sharks MOU has defined general objectives for the conservation and management of species and populations listed in Annex 1 of the MOU, which are further detailed in a global Conservation Plan for migratory Sharks (Annex 3 to the MOU).
18 Octubre 2015

Illegal Take and Trade of Marine Turtles in the IOSEA Region

Illegal take of marine turtles can assume various forms, from poaching of animals and eggs on nesting beaches to illegal take of animals at sea.   Typically, green and leatherback turtles are hunted for their meat; the hawksbill turtle is hunted for its carapace as the raw material for craftwork; while the eggs of loggerhead and olive ridley turtles are considered a delicacy.  Turtle meat consumption reportedly occurs in 75% of IOSEA Signatory States, while trade in shell products seems to be predominant in East Asian countries.  Whereas numerous investigations in this regard have been unde

18 January 2018

Ecological Risk Assessment and Productivity - Susceptibility Analysis of sea turtles overlapping with fisheries in the IOTC region

Interactions between sea turtles and fishing activities have been listed as a significant threat to sea turtles. This study aimed to assess which sea turtle species/populations in the Indian Ocean (IO) are at risk from interactions with tuna-related fisheries. The approach used was a desktop study to compile (1) all available data on sea turtle population demographics, rookery sizes and at-sea distributions; and (2) collate all information of longline, purse seine and gillnet effort and sea turtle interactions in the Indian Ocean.

30 April 2015