GVI Kenya

Category: Kisite Mpunguti MPA, Turtles, mpunguti island | Date: Oct 21 2009 | By: gvikenya

Around 2000 years ago, trade in sea turtle products was observed in the Red Sea and East Africa region and although trade in ambergris and ivory occurred, tortoise and turtle shell was the most commonly mentioned product.  (Jack Frazier, Proceedings of the Western Indian Ocean Marine Turtle Conservation Workshop, Mombasa, 2005). All five species of Indian Ocean sea turtles are considered to be endangered and can be found in Kenya. Green turtles (Chelonia mydas) are reported to nest throughout the coastline but although there are some green turtle nests confirmed in the nearby area of Funzi Island, sea turtles haven’t laid their eggs in the KMMPA (Kisite-Mpunguti Marine Protected Area) for at least seven years.

So it was with great joy that last week GVI Kenya heard the good news about a green turtle visiting the white sandy beach located in the Lower Mpunguti Island. Lily, from Coral Spirit Restaurant, located in Wasini village, shared with us the pictures she took while she was visiting the island.

Green turtle arriving in Lower Mpunguti Island in September 2009 (photo by Lili Angel).
This is an amazing happening in this Marine Protected Area, and will hopefully contribute to the conservation efforts GVI and its major local partner KWS (Kenya Wildlife Service) are putting in place in the area. The islands of Mpunguti are known to support an important population of coconut crabs, nesting sites to African fish eagles, and its surrounding waters are frequently visited by Bottlenose and Humpback dolphins, as well as Hawksbill and Green turtles that feed on sea grass and algae. Both local fishermen and KWS rangers still recall the days when the turtles came to lay eggs on the Lower Mpunguti Island, the only sandy beach available for setting up the nest.  It has been almost seven or eight years since the last turtle arrived on the Lower Mpunguti Island.

 Female Green Turtle preparing the nesting site, throwing sand with her flippers (photo by Lili Angel).

Green turtle leaving the beach, returning to the sea (photo by Lili Angel). 
Green turtles typically live about 45 to 59 years. Given that a female nests in six or seven of those years and lays about 330 eggs each nesting season, she will produce 1900-2300 eggs in her lifetime. Factoring in natural predation, fungus infection of nests, and other embryo failure rates, one can expect each healthy female to produce 1000-1900 hatchlings (Spotila, James R. Sea Turtles, 2004). This information emphasises the importance of a single nest in this region. Although this turtle did not lay its eggs, she might go back to the nesting place or other turtles might look for this place as an option to nest. The next crucial step in this process is to take management actions in order to protect the nesting area and recognize it as a non-disturbance place.

Nesting site attempt (photo by Lili Angel)
The historic decline of green turtles is one of the most cited and best documented conservation issues. Its population has declined 50-70% since the 1900’s and they are recognized internationally as endangered by the World Conservation Union (IUCN) and are protected in the Appendix I of the Conventional on International Trade in Endangered Species (CITES) and in Appendix I and II of the Convention Migratory Species (CMS).

The Kenya Sea Turtle Conservation Committee (KESCOM) was established to complement government commitment to addressing global concerns for marine turtle population decline. GVI works closely with KESCOM in sea turtle conservation efforts, through research, education and capacity building activities such as training in biology and ecology of sea turtles. The data and the pictures collected in our study area (KMMPA) are shared with this organization in order to recognize and protect important foraging, mating and nesting areas for sea turtles. The ultimate goal is to restore green turtles to population levels at which they can fulfil the ecological roles they performed in the past.

 Ines Gomez

Tags: , African Fish Eagle, algae, ambergris, biology, bottlenose dolphin, capacity building, coconut crab, conservation issues, Convention Migratory Species, Conventional on International Trade in Endangered Speci, Coral Spirit Restaurant, East Africa, ecology, education, embryo failure rates, endangered, fishermen, fungus infection, Funzi Island, global conscerns, hawksbill turtle, humpback dolphin, indian ocean, ivory, Kenya, Kenya Sea Turtle Conservation Committee, Kenya Wildlife Service, kisite mpunguti marine protected area, KWS rangers, Lower Mpunguti Island, management actions, natural predation, Red Sea, research, sea grass, sea turtles, tortoise shell, turtle shell, Wasini Village, World Conservation Union

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Category: Cetacean research, Dolphins, Kisite Mpunguti MPA, Turtles | Date: May 01 2009 | By: gvikenya

Keziah gives us the news from yesterday’s marine research:

I woke up 6am in Shimoni, waiting to find out when the boat would come to pick me up at the jetty. With the rainy season, start times of marine surveys become a wee bit unpredictable - with one eye on the rain clouds you just have to wait for the opportunity! However, the sun was shining, there was no sign of rain and a phone call later I was jogging through Shimoni village to the boat.

We headed out towards Funzi Bay, across Nyuli Reef and to Upper Mpunguti Island when we had our first sighting of dolphins, something that has also become less predictable with the season. At first we thought there were eleven Indo-Pacific bottlenose dolphins, but soon realised this was an underestimation. Ten on the port side, ten on the starboard side, we didn’t know quite where to look, excitedly swapping sides with a chorus of gasps and squeals from our team, and splashes and blows from the dolphins.

Several individuals were identified immediately, including one of my favourite pairs; Besty and her calf. I had the pleasure to be on the boat when we spotted Besty and her newborn calf for the first time, adorably small with the foetal folds still showing! Others including Twende and the yet to be named individual ‘063’ were also identified.

The group were at first travelling fast in a southerly direction, then their pace slowed, with a couple of individuals approaching the boat to bow ride. This enabled us to get good shots of the dorsal fins, which will be used for photo-identification in our mark-recapture study. Unfortunately we also noticed an adult and juvenile that appeared skinny compared to the rest, with their ribs visible. We hope this wasn’t a sign of illness in the population or lack of food in the area… After taking enough photos we left them to continue south to the open sea.

The dolphins had done us a service, leading us to the start of the snorkel transect our survey leader had selected for the day, by Kisite Island… and it turned out to be the perfect day to pick this transect! As we climbed out of the water to board the boat post-survey, everyone’s face was an absolute picture: 3 hawksbill turtles, 5 green turtles and 1 moray eel! Ruth and I even had the pleasure of watching one of the green turtles swim slowly to the surface, stop for a few seconds and then continue to raise its head out the water, beak open for a gasp of air. This was closely followed by us both surfacing and giggling hysterically with joy having witnessed a behaviour in full that we had only seen before from above the surface as a turtle’s head appear and disappear in a second!

With the weather being on our side, we decided to return towards Funzi Bay again, but the sea was just a little too rough, so we diverted in to Wasini channel. Within 5 minutes of turning the boat around there was a shout from Katalin at the front, “DOLPHIN”, followed quickly by “HUMPBACK DOLPHIN!”. We had to wait 10 minutes for the individual to reappear, a very large Indo-Pacific humpback dolphin that seemed curiously darker than usual. We put this down to the glare of the sun, and waited for what we thought was a lone individual to resurface.  Then two individuals surfaced riding a wave, both smaller than the first. Several more minutes of waiting and we were shocked to see not only the three individuals from before, but another two adults and calf!

We continued to watch them for 20 minutes as they were feeding, coming up for several breaths before peduncle dives took them under for several minutes.  After surfacing for the third time, in unison, they formed a compact group, changed direction and headed south, crossing the channel towards Wasini Island. We were able to compare the colouration of the first individual and yes, he was distinctly darker, not something we had seen before. The mother of the calf had a deep scar around her neck, possibly from a fishing line. Only 2 weeks ago an individual was spotted with a huge chunk out the back of his dorsal fin, the shape suggestive of a boat propeller injury. Both these wounds emphasize the humpback dolphin’s vulnerability to fishing activities, boat traffic and marine debris around coast lines. But fortunately also an ability to recover from significant injury.

All in all it was quite an epic day for our research team and for me one of complete brilliance!

Tags: bottlenose dolphin, Cetacean research, dolphin research, funzi bay, green turtle, hawksbill turtle, humpback dolphin, Kisite Mpunguti MPA, turtle research, wasini channel

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Category: Cetacean research, Dolphins, Kisite Mpunguti MPA, Turtles | Date: Jan 29 2009 | By: gvikenya

It doesn’t happen as often as I’d like with so much else going on but yesterday I joined the marine research team, 6.30am departure aboard our research vessel ‘Lampard’, on calm waters with the rising sun to warm us…

I take the tiller, captaining the boat east out of the Wasini channel, the rest of the team assume positions for dedicated watch. Passing the coastal forest of Shimoni I spot a colobus in the canopy and an African Fish Eagle… but today is the marine research programme, and it’s dolphins and turtles that we search for.

Rounding the south-east corner of Shimoni peninsula we enter Funzi bay, hoping to spot Indo-Pacific humpback dolphins that favour these near-shore habitats. No sign of them today. We pass a green turtle, but sadly a recently dead one floating at the water’s surface. No obvious cause of death, but this time of the year, during the kaskazi winds (the NE monsoon winds), seems to bring a peak of turtle mortalities each year.  Much of Funzi bay is shallow and doesn’t leave us much room to manouvre so we turn the boat around and head south, towards the continental shelf and open water. A flock of terns dives persistently at the water’s surface but the fish shoal they target has gone unoticed by any dolphin.

A more distant splash and a suspected dolphin sigthing, something dark and rounded surfacing. Half-way there before it becomes evident it’s another dead turtle bobbing at the surface. A huge one this time, a hawksbill, it’s been dead for longer and given the size it reached, somehow a sadder loss as we circle around it and continue our route south.

Sergi, our marine research officer takes over from me at the stern as I join the rotation of observers up front, each with our 45 degree field of view to patrol. Tom calls out a potential dolphin far ahead, an apparent leap and splash, Sergi steers us toward the point on the horizon and we keep scanning the surface. We rotate positions, both Tom and I looking forward, he sees something again, but is disappointed when there’s no following dorsal fins or repeat splashes.

Still we head further south, further from the shore and are rewarded 15 minutes later by 4 dorsal fins breaking the water’s surface ahead. They approach the boat to ride the bow and a further 3 dorsal fins join them. We expect them to be Indian Ocean bottlenose dolphins out here, but the small triangular fins, the smaller torpedo-like bodies and the long narrow beaks all point to something different. Three tone body colouration as they surface confirms we have found a small group of spinner dolphins.

Sergi hands me the camera, I try to get photos of the dorsal fins of each one as they sruface to breathe. It’s not as easy as it seems it should be. Unpredicatable quite where and when they will surface as they dart across the bow just below the surface, the angle has to be right, the sun behind, sharp focus… and you have to be quick. Sergi uses the time to talk the team of observers through the dolphins’ behaviour. Close to the surface, regular slow shallow surfacing, no obvious directional travel; they were probably resting. We leave the small group and within minutes an apparent lone individual further away leaps from the water, an acrobatic spin that gives them their name. Then 10 dorsal fins surface to our right. We barely get through counting them when at least 20 fins appear on the right. Our group of 7 was actually part of a larger group, in the end we estimate 40 to 50 individuals.

Spinner dolphins are thought to be seasonal visitors to this part of the Kenyan coast, possibly crossing the channel from Pemba, following the food with the kaskazi. In previous years we have recorded them between mid-February to mid-March, in large active groups (up to and over 200) off the shelf, south of the MPA. This kaskazi we had one sighting in December, and then last week. We do not think that this season represents any ‘break from the routine’ but more likely that our new research vessel gives us a higher, clearer viewing platform, and survey routes take us further from shore so we simply see more. The real exctitement is that we are now understanding more about these seasonal visitors; their ’season’ is longer than we first thoguht, and they are using habitats east of the MPA for resting suggesting they may be here for more than just quick foraging forays. Ironically, the fact that they are consistenly recorded outside of the marine protected area is not of too great concern. They are free from disturbance by the dolphin-watching tourist boats and in the absence of commercial fishing activities are not threatened here by high levels of accidental deaths from by-catch that plague some of their open-ocean counter-parts through industries such as tuna fisheries which are yet to be quite as ‘dolphin-friendly’ as we might be lead to believe.

I’ll keep you posted throughout our ’spinner season’…

Tags: African Fish Eagle, Colobus, dolphin research, green turtle, hawksbill turtle, Kisite Mpunguti MPA, spinner dolphin

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