Marine and Coastal news round-up in the Western Indian Ocean Region (26 September 2017)

Date posted: 
Wednesday, September 27, 2017

Global Sea Turtle Conservation Successes 

The researchers document a tendency for published estimates of population size in sea turtles to be increasing rather than decreasing across the globe. To examine the population status of the seven species of sea turtle globally, researchers obtained 299 time series of annual nesting abundance with a total of 4417 annual estimates. The time series ranged in length from 6 to 47 years (mean, 16.2 years). When levels of abundance were summed within regional management units for each species, there were upward trends in 12 regional management units versus downward trends in 5 regional management units. This prevalence of more upward than downward trends was also evident in the individual time series, where we found 95 significant increases in abundance and 35 significant decreases. Adding to this encouraging news for sea turtle conservation, researchers show that even small sea turtle populations have the capacity to recover, that is, Allee effects appear unimportant. Positive trends in abundance are likely linked to the effective protection of eggs and nesting females, as well as reduced bycatch. However, conservation concerns remain, such as the decline in leatherback turtles in the Eastern and Western Pacific.The findings highlight the importance of continued conservation and monitoring efforts that underpin this global conservation success story.

Click here to read the full length Paper

Read an earlier related Publication: Placing Madagascar's marine turtle populations in a regional context using community-based monitoring

Climate Change Challenges the Survival of Fish Across the World

University of Washington researchers are tackling this question in the first analysis of how vulnerable the world’s freshwater and marine fishes are to climate change. Their paper, appearing in the Journal Nature Climate Change, used physiological data to predict how nearly 3,000 fish species living in oceans and rivers will respond to warming water temperatures in different regions. The researchers found that overall, sensitivity to temperature changes varied greatly between ocean-dwelling and freshwater fish. In general, marine fish in the tropics and freshwater fish in higher latitudes of the Northern Hemisphere were the most at risk when water temperatures warmed, the analysis showed.

Click here to read the full length article or here to read the full length paper

Nairobi Convention Back to Back Meetings

The Nairobi Convention is organizing a series of meetings which will be held back to back from 13-17 November 2017 in Mahe Seychelles, pursuant to the decisions of the Eighth Conference of parties to the Nairobi Convention. The planned meetings contribute to building on previous successes and strengthening and increasing linkages between partners, programmes and implementation of projects, as part of the Nairobi Convention work programme for 2013-2017.

Click here to get more information