Tuesday, May 15, 2012

The party is over - the fat lad was singing !

It seems that most of the humpbacks have left the sheltered waters around Baia de Sal Rei which has been our main hunting ground the last few weeks.  After a day off ashore on Sunday we had no sightings yesterday (Monday) or today (Tuesday), and no sightings from the whalewatching boats either.  Today we went back to Santa Monica Bay to the south and although there were no sightings we did record a singer ! He (presumably a male) stopped singing after 3-4 minutes but did not surface near us and was never seen, or heard, again.

Darren and Pedrin
So many thanks to José, Juan and Natura but especially Pedro López-Suárez, our host who has looked after us so well. Another successful campaign, especially by Conor and Darren who put the time and effort in and justly got there deserves.  As the humpback whales head north to Iceland, Norway (and maybe Ireland !!) we wonder what will wait them in Cape Verde on there return.  Tourism development is still developing fast, with the hotel at Lacacao (below) now open since I was here last year and a huge 5 star hotel starting to be built at Santa Monica with 2,000 beds !!


We hope the people of Boavista and Cape Verde can make room for the humpback whales and other magnificent and often unique wildlife in the Cape Verde Islands and provide a 5 star wildlife watching experience to visitors to Cape Verde so many can experience the amazing spectacles we have witnessed during our research.
Humpback waving goodbye !!!

Simon Berrow

Friday, May 11, 2012

Breaching Manta Ray - whatever next !

The weather was pretty good and we battered up north of Ponto do Sol for a "furthest north". At one point I thought I saw the mountains of Sao Nicolau in the distance but it must have been the swell.  We made good progress to a breaching whale which was also pec slapping and when we arrived found two adult whales.  They gave us the run around but eventually we obtained good dorsal fin images and one fluke shot. The fluking whale was well known but had a reputation of being evasive and the second whale was a new one but both were candidates for biopsy sampling. Unfortunately as we tried to get close enough we never managed to get samples despite some hopeful long distance shots.  Good news is the crossbow worked after our home-made fix yesterday.  
The fixed crossbow with foot strap cut and fashioned into two braces
In the afternoon we located the same two whales again but they had two whalewatching vessels with them and we still very evasive having been harrassed for hours at this stage.  One more distant blow in the afternoon but no sightings, images or biopsies.
Breaching Manta Ray (upside down) (Darren Craig)
In the morning we did have a lovely encounter with around 12-15 rough-toothed dolphin swhich seemed to follow the whales and Darren got an image of a breaching Manta Ray on its second breach - great shot Darren ! Maybe tommorrow we will have better luck with the whales - we need it !!

Simon Berrow

Thursday, May 10, 2012

The good, the bad and the broken.

There was another choppy day on the water had by all yesterday. It seems the whales show up when conditions are less than ideal. We got onto a single animal yesterday morning with regular down times but with quick surfacing. As we concurred that we had not sampled this animal before, we tried  following it closely. But unfortunately the whale got the better of us and sneaked away south.
Then, there was a breacher in the distance that we attempted to track. However, it also eluded us after the weather deteriorated to an even worse state. We were soaked head to toe by the time we started to head for port. It wasn’t all bad. On the way home, we were joined by approx. five rough tooted dolphins. A nice addition to the cetacean species list.
A better weather day today did not translate to better sightings/ biopsies. Only one whale was spotted and we had already biopsied ‘Pat the singer’ this year and last year. So we decided to leave the poor fella alone this time. A bit of a hic cup with the cross-bow this morning meant we had to come in early. After myself and Simon worked on it for the afternoon, we have mended it (hopefully!) and ready for action again. We took a trip out to give it a trial run, but of course there were no whales to test it on.

Tuesday, May 8, 2012

Happy Birthday Sally

Having missed a biopsy shot at a humpback whale yesterday, and suffering a sleepless night thinking about the miss, how, why and what can I do to improve my shooting, it was nice to get a second chance today !! Despite strong winds and a big swell (3-4m) we finally caught up with two adults and a calf off Ponto do Sol to the north of Sal Rei. We would never had found them if it wasn't for the calf breaching continuously over and over agan. It does seem the high seas brings out the aerial behaviour of humpback whales.

After mighty driving from Darren we finally got close enough for a biopsy attempt and got a skin sample from the escort which surfaced closer to the calf than the mother (as determined from a previous encounter with this mother-calf pair on 1 May).

Calf brreaching in the high seas off Ponto do Sol. Image by Pedrin
After this high sea chase we lost the whales but found two more adults at the southern end of Bais de sal Rei courtesy of a whalewatching boat. The whales also provided us with some huge breaches with belly slaps as well as the more usual back flips ! One of these whales was already sampled and was first photographed 20 years ago in 1992 off Norway during Project YONAH.  It was also recorded off Cape Verde last year (2011) but hads not been seen in the preceding 19 years - I guess it had been hiding away in Cape Verde all those years. we did not manage to get a sample of th esecond whale, which we think was the one I missed yesterday.  Ah well, there is always tommorrow !!
Adult whale demonstrating the art of a belly slap, ouch ! Image by Pedrin
This makes the total number of biopsies from Cape Verde this year to 21 from 19 new individuals. It takes my total from Cape Verde to 1; on my sisters birthday too (Happy Birthday Sally).

Simon Berrow


Sunday, May 6, 2012

Return to CVI

Despite wandering around Glasgow Airport for an hour last night looking for my hotel (wrote down reference number for booking but not the NAME of the hotel) I arrived sucessfully, and on time, to Boavista today.  Landed at 12:30 local time, cleared customs etc. at 13:30 and headed out to look for whales with Darren and Pedrin at 14:30.  Sea was as calm as I have seen it in Boavista - seastate 3-4 and very little swell but no whales seen, though the lads did see one blow this morning. So great to be back for my 4th time to Cape Verde searching for whales.  Humpbacks in CapeVerde do not give there secrets up easily so looking forward to long days at sea searching for whales to photograph and biopsy sample. Darren and Conor have already broken the back of this years fieldwork so I'm not under the same pressure they were but still have to show these young un's I still have something to contribute !!!

Simon Berrow

Saturday, May 5, 2012

Lucky Shot

Apologies for the lack of blog content over the past few days. I have been computerless since last week and therefore have temporarily lost touch with the outside world. Not much to report over Thursday and Friday as I was having some down time.
We were back at it today though. The weather has taken a turn for the better so we decided to seize the opportunity. We set out on a mission to get another biopsy sample, and we successfully obtained biopsy number 20 for this season.  It looked like it wasn’t going to work out with the two adults we were pursuing .But on the last attempt before we broke for lunch, Pedrin managed to hit the whale under the water, true skill.
A brand new species for our species list today.  A five meter manta ray was spotted at the surface about 10m away from our boat.
Humpback lounging with pec fins in the air.

Wednesday, May 2, 2012

Chasing video footage.

Escort with calf rolling and mother rolling in the foreground.(Darren Craig)
There was a bit of a stormy patch on Monday so it was relaxing day off. Even though the forecast didn’t look great for Tuesday, we took a chance and it paid off. In the morning we set out to get some film footage for Ken O’Sullivans Sea Fever Productions. We stumbled onto a single animal who breached about 10 metres away from our boat. It was a bit of a surprise considering we were only speculating a faint blow in the area. Another two breaches and the animal was gone, very crafty.

 After getting a little tip from the whale watching boat, we got onto a mother and calf just west of the harbour entrance. We tried to get close to them but, alas, they were being evasive and soon darted off west (at least that where we think they went).

Following a spot of lunch, we set out from the harbour. Within about one and a half minutes we spotted a blow. This is great; the whales are starting to come to us now. We followed this mother, calf and escort south into Sal Rei Bay. The whales didn’t seem to bothered by our boat so we sneaked up on them and Ken slipped into the water to attempt some underwater footage. The pod stuck around the same area sub-surface for quite a while so there may have been a possibility of mating occurring. Or maybe they were just hugging, who knows?
Calf fluke. (Darren Craig

Lobtailing male. (Darren Craig)


This morning was another rough day on the water. We were lucky enough to see a couple of adults lob-tailing a number of times over approx. 30 minutes. It was difficult trying to get pictures and video footage as the weather was worsening and there was water splashing everywhere. We called it a day at lunch-time as the swell had picked up to 3 metres and the sea state was hitting a 5.

Upon our return to natura today, we were greeted by an adult red-billed tropic bird, in a cardboard box! Someone had saved the bird from being eaten and had dropped it into the office. We are off to the beach now to release it.

Sunday, April 29, 2012

Quiet Weekend


We got back on the water yesterday, aboard one of the Islands whale watching tour boats (Tartaruaga del mer). We came across a single whale breaching and tail slapping about 500m from our vessel. A closer encounter was attempted but to no avail. A few mediocre photos were taken, enough to recognise that this was a new animal for this year at least. 

Today was even less eventfull.  Heading out on our old faithful RIB, we were greeted with a 3m swell breaking just inside the port. Fearing a rough start to the day, we went to the southern end of the bay to ‘calmer’ waters. Again there was a brief encounter with a very quiet whale, which seemed to only blow once per surface. We possibly recognised this animal as ‘Pat’ the singer from a couple of weeks ago. Unfortunately we didn’t obtain any useful photo-I.D.’s to make the match.  He headed off west into the roughest waters I’ve seen since arriving on Cape Verdes. We called it a day since there was little chance of locating whales close to shore in these conditions. 



Darren Craig.

Friday, April 27, 2012

Sal Rei Island








After saying farewell to Conor ( while holding back the tears :-)), we welcomed a days rest away from the water. At the moment our boat is getting some rest too and a quick service as it has being clocking up the mileage over the last couple of weeks. 


Today we hit the water again, but without our boat we were in it rather than on it. Myself and Ken O’Sullivan snorkelled through a kilometre of shallow water to reach Sal Rei Island. We spotted plenty of healthy coral and colourful reef fish on our crossing, far too many to try and identify. Sal Rei Island is a small island in Sal Rei bay, measuring roughly 1.5x0.5 km. It is currently uninhabited and there are plans underway to establish a whale research centre along with accommodation on the island. On the island there are remains of a small Portuguese fort and a basic lighthouse. Both of which are great vantage points offering views over the main study area of our research. Valiant efforts are taking place to clear the island of rubbish which as accumulated over the years. Progress is being made swiftly and hopefully the centre will be open sometime next year ready for more extensive research to take place.

                                    Ken manning the fort with view of Sal Rei Bay in backround


Species List: Osprey(3), Cattle egret(2), Brown-necked Raven, Gecko (4), Cardinal fish, Powdered Tang, Damsel fish, Parrot fish, Rainbow Wrasse.

Darren Craig.

Thursday, April 26, 2012

Notch's Girlfriend

Yesterday we encountered a whale that had been escorted last year by Notch - an infamous breacher/pec-slapper who put on some amazing aerial displays last year including a 15 minute display of over 20 full breaches. Song recordings and genetics confirmed that Notch is a male and he is back in Cape Verde again. We biopsied the female that he had been escorting, and her new calf. We will be able to see if he sired this calf, and how many others for that matter.



Notch's Girlfriend



Dodgy picture of a male magnificent frigatebird


We took two more samples in the morning - what may have been a young male. This whale was small with a lot of scars, and did some breaching including one full breach (tail and all out of the water!) quite unexpectedly about 50m from our stern. This whale was travelling with a female without a calf. The five samples collected yesterday brings to 19 the number of tissue samples collected this year. Altogether we now have DNA samples from 43 individual whales which is close to ideal sample size of 50 which is required for most decent population genetic analyses. We are delighted to get so many in such a short period, considering there are so few whales around here (we encounter the same individuals on an almost daily basis, but only biopsy 'new' animals).

I am flying back to Dublin via Manchester this afternoon after 2 memorable weeks of productive fieldwork in great company. Thanks to Darren Craig for the trojan work and enthusiasm - twas great craic. We owe so much to Pedro Lopez Suarez ('Pedrin') too, for helping us with sampling permits, chartering boats, pick up our fuel every day and for sharing so much of his knowledge about the whales and the local area. This research is simply not possible without his help. José was our skipper for most of the past fortnight and has been superb - he always keeps a cool head and has great control over the boat, managing to keep the splashes to a minimum... so important considering our camera and biopsy gear hate sea water.
Pedrin at work on the Tartaruga do Mar  whale-watching boat

From Left: Pedrin, Conor and José (by Darren Craig)

Darren will take a breather for a week or so before Simon Berrow arrives on May 6 to carry out another 2 weeks of fieldwork. Darren will keep you all posted on this blog.

Until next year...

Ciao

Conor Ryan

Tuesday, April 24, 2012

Well-Earned Rest

Part of me was praying for windy conditions so we could take a break (it is very hard to justify taking a break during settled conditions here considering they come along so rarely). My partial prayers were answered today when the wind was blowing 20 knots, so we took a well earned break. Funnily enough, we still woke up at 7 on the button. The day was spent catching up on boring office stuff/paper work. This paid off as we received our CITES export permit from the Cape Verdean authorities this afternoon... but are still waiting for NPWS to respond to our import licence application a month ago...

Darren was mixing some whale songs, which sounded pretty cool... I can see them being a hit, perhaps it might help fund our next expedition. We just need a record deal. 

Tomorrow will be my last full survey day as I head back to Ireland on Thursday. Conditions are forecast to be marginal so hopefully we will find whales in the shelter of the bay. The last couple of days there has been a very curious young whale approaching boats, spy-hopping and tail-waving only metres from whale-watchers. Hopefully we can catch some of that action. The long-term forecast is not nice, but we will probably take a week-long break between me leaving and Simon arriving (first week in May) so that Darren can re-charge the batteries. The surf forecast looks good at least. 



I plotted out our survey effort for the past 2 weeks. We have good coverage down the west and south coasts, but have yet to round Ponta do Sol to survey the north coast. Hopefully this can be done in May if conditions allow as we had some good encounters in that area last year. 


Monday, April 23, 2012

Bird Safari

This morning we had a tip-off from the whale-watching boats that there were two whales close to the harbour entrance at Sal Rei. We picked them up quite easily just 300m or so from the harbour in shallow water. We cut the engine and they gave us quite a surprise as the calf surfaced only a boat-length away and the mother swam right beneath us - white pectoral fins visible under the surface. We sampled both animals and called it a day early as the wind and swell were on the increase (not to mention we were worn out after many days on a bumpy sea in a small boat). News came in later of 5 more whales in the bay to the south.

Back ashore, Laura (bean an tí) had a fantastic lunch of fish and roast vegetables ready for us... she is a great cook and has her work cut out feeding us hounds.

Pedrin is involved in osprey research and invited myself and Darren along to collect some feather samples for a stable isotope study. Pedrin has found 89 osprey nests on Boa Vista and regularly visits some of them in order to ensure that the chicks/eggs have not been stolen or predated (usually by people or brown-necked ravens). We waded out to an islet and climbed up the cliffs to find a prominent nest, about the size of a large armchair, made  with sticks, coral and sponge with the odd flip-flop and brush-head thrown in. The two chicks 'played dead' for a few minutes while we collected a feather from each. The parents were hovering overhead but never dive-bombed us (as Pedrin had promised).
Adult Osprey

Pedrin next to Osprey nest, collecting feather samples
Cream-coloured courser - a desert wader

Two osprey chicks on the nest


The journey out to the islet brought us through desert, sand dune and some grassland. We had some great views of: cattle egret, whimbrel, Kentish plover, cream-coloured courser, hoopoe lark, desert lark, black-crowned sparrow lark, Iago sparrow, brown-necked raven, osprey and quail.

Whales few and far between...


Black-crowned sparrow lark seen at 7am on my way to the bakery (Conor Ryan) 
This morning we covered most of the inshore waters of the northwestern side of Boa Vista but only encountered two very evasive whales. One was singing so we recorded 28 minutes on the hydrophone. The second whale was a smaller animal and was only blowing twice before diving. It looked similar to a whale that we biopsied yesterday judging by the shape of the dorsal fin. The wind was freshening so we called it a day. On the plus side, I managed to photograph a flying fish for the first time ever!
Flying fish (Conor Ryan)

Sunday, April 22, 2012

Productive Day!

Yesterday we had some exciting encounters with breachers and lob-tailing whales. 
Taking flight (Darren Craig)


Splash after a full breach (Darren Craig)


Half-breach (Darren Craig)


One male whale which we know from last year was lob-tailing only about 20m from the boat as we drifted passed in the wind.
Humpback bull lob-tailing in front of 'humpback hill' (Darren Craig)

We managed to collect 3 biopsies with two 'lob' shots at distances of between 20 and 30m as the weather conditions were quite good. 
Biopsy dart re-bounding with a sample (Darren Craig)


We got fluke images for photo ID from each whale too. All 4 whales that we encountered were heading south which means we might need to search down south in the coming days in order to find them. We went for a quick dip over an offshore reef where there was plenty of life (including a small shark, parrot fish and tangs/surgeonfish) and the visibility was easily >20m. 

Back at Natura it was our Bean on tí, Laura's,  birthday so we had a bit of a shindig. 

Friday, April 20, 2012

Cachupa

A nice shot showing the long white pectoral fin (the longest pentadactyl limb / 'hand' in the animal  kingdom) which can reach 5m in length... the same length as our RIB! (Darren Craig)


The sea conditions were quite good today, but many of the whales that we encountered have already been sampled (either this year or last year). Deciding which ones to biopsy when given the opportunity is getting tricky. We know most whales by the scars and shapes of their dorsal fins and have a mental library of 35 or so whales that we have already sampled.... We take a hard copy of our dorsal fin catalogue out on the water with us, but there is not always time to consult this when the whales are alongside us. I didn't manage to collect any biopsies today - but I did try an ambitious 40m lob-shot which narrowly missed. Hopefully tomorrow will present more opportunities with new animals. Darren got plenty of dorsal and a few fluke ID shots.

We encountered 10 individual whales today and were treated to an array of behaviours including breaching, lob-tailing, pec-slapping, trumpet-blows, bubble-blowing and tail swipes. Trumpet blows are loud forceful blows which are a sign of aggression along with bubble-blowing and tail-swiping (side-swipes of the flukes at the surface). These behaviours were seen in escorting males as they were competing for a female (who seemed more interested in our boat than the males!).
A female whale off Praia do Chaves in only 11m of water (Darren Craig)                                   

Lips are well and truly chapped now and the farmers tans are coming along nicely. We have been on the water all day every day since arriving here 8 days ago and are looking forward to a rest day when/if the weather dis-improves.

Bird List: magnificent frigatebird (1), brown boobie, osprey,Cape Verde shearwater, red-billed tropicbird. We had an Olympic flying fish which stayed air-borne for about 15-20 seconds covering at least 200m! We also spotted a large (2-3m) shark offshore but could not identify the species.

The day was topped off with a big feed of Cachupa - a beautiful traditional Cape Verdean stew of fish, beans, corn and cabbage.

Thursday, April 19, 2012

Cooperative Humpies

Today we left our mooring at the southern tip of the island and headed further east, past a seabird colony. We saw a magnificent frigatebird circling over the islet of Curral Velho, where the last pair in the entire Palearctic breeds. These frigatebirds are unusual in that they nest on the ground as opposed to on trees which makes them particularly vulnerable to predation by introduced mammals and humans.

The winds today were light by Cape Verde standards - about 14 knots and forecast to drop to 9or 10 knots in the coming days hopefully making for excellent fieldwork conditions.We took a peak around the corner from Curral Velho at the eastern side of Boa Vista where the wind is normally howling as it faces into the prevailing northeasterly trade winds. We spotted a mother-calf pair both breaching and lob-tailing about 3km offshore. We tracked them slowly inshore until they were in water just 13m deep and we could see them beneath the surface the entire time. We managed to biopsy the mother.
Mother and Calf Pair about 40m from the shore (Darren Craig)

We came across a singing male ("Pat") on our 40km transit along the west coast back to the north of the island. He could be heard singing without and hydrophone through the hull of the boat. We recorded about 25 mins of song as he belted it out right beneath us. He showed us his fluke and even breached as we left him behind us. It was interesting to see this whale surface to breath while singing continuously... normally they stop singing before surfacing to blow.

As we rounded the corner into Baia Sal Rei we encountered a competitive group - the first for us this year. Competitive groups comprise a female (sometimes with a calf) and several males competing for dominance / access to the female. Encounters with competitive groups are very exciting as the males battle it out. Today one of the escorting males had a bleeding gash across his fluke. We saw some streams of bubbles too which can be a sign of aggression. All four whales were approachable so we successfully biopsied each one and Darren photographed two flukes while Pedrin had photographed the other two earlier in the day from the whale-watching boat.
A male escort with fresh grazes on his fluke (Darren Craig)


This is the first time we managed to sample 5 whales in one trip - a fantastic day!

Birds List: Magnificent frigatebird (1), white-faced stormie (>10), Cape Verde shearwater, brown boobie, osprey (1)

Wednesday, April 18, 2012

Santa Monica

We got a lift to the southern end of the island to Lacacao in one of Natura's 4x4s. The divers at the local hotel gave us a lift out to the rib which was still on it's mooring (thankfully... if it had gone adrift: next stop Brazil). We headed northwest towards Santa Monica where we want to spend a few days, following reports of many whales there. Santa Monica is usually out of reach for us as it is a long transit from Sal Rei past some dodgy reefs and shallow water which are exposed to the northeasterly wind and swell. We only encountered one whale there having put in about 7 hours of driving and about 60km of mileage. We could not find the animal again after seeing just two blows. We made over one hour of whale song recordings, with two whales singing a duet at one stage.

After a long day with no photo IDs or biopsies, we were about to pick up our mooring when we spotted a mother and calf about 200m from it!... apparently these whales had been there 'all day' .... sometimes nature is just cruel. We tried to track these whales but they disappeared into the glare and we had only 20 minutes or so before our lift back to the beach (on the diving boat which is landed at about 20knots onto the sand) was no longer on offer. We will return to Lacacao and will spend more time near our mooring this time. If conditions allow we plan to make the 40km journey back to Sal Rei tomorrow afternoon. We plan to close the circle by going to Lacacao the other way over the weekend (i.e. around the north and east coast of Boa Vista) as the forecast looks good. These are areas where very little (if any) search effort for humpbacks has been made in the past.

Bird List: Magnificent Frigatebird, red-billed tropicbird, white-faced storm petrel, Madeiran storm petrel, Cape Verde shearwater, brown boobie, black-winged stilt, bar-tailed godwit, Kentish plover, turnstone, cattle egret, hoopoe lark, Iago sparrow, brown-necked raven.





Needle fish and flying fish were abundant all day.

Tuesday, April 17, 2012

Southern Survey and Singing Whales


Our new skipper Jose joined us today to make our first trip down south to Lacacao. With the weather conditions up to the same old tricks(2-3 metre swells and 20 knot winds) we set off due south-west straight into Sal Rei Bay. We immediately got onto a pod of three animals, a mother, calf and one very large escort. On our first approach we gained a biopsy of the escort who was always in between us and the mother calf pair. With a quick reload we attempted to biopsy the mother but they had set off towards the north into a choppy swell. We gave up chase as surfacings were erratic and the animals were moving at a fair speed.  After getting dorsal images of the all three animals  we headed south to calmer waters.
Biopsy dart striking escort 

 There were no sighting from our search down south although after dipping the hydrophone in flat water we picked up 40 minutes of whale song. Our mooring was then located by Pedrins free diving skills, so we tied our boat and headed ashore on what was the most exiting beaching of a boat Ive ever experienced. The local dive club gave us a lift onto the shore at about 35kph with a ‘handbrake turn’ into the sand for good measure. The weathers looking good for the next few days so hopefully we’ll get some good surveying to the south the island.
                                                 Conor listing to a singing male Humpback
Species List: Flying fish, Needle fish (8), Brown boobie, White-faced Storm Petrel,  Cape Verde Shearwater (6), Hoopoe Lark, Tropic Bird, Osprey.

Monday, April 16, 2012

Birding

We hit the water this morning and were forced south in strong winds and a building swell. After 2 and a half hours of searching in poor visibility, we decided to call off our survey as conditions were not suitable. The rest of the day was spent organising our trip south to Lacacao tomorrow. We met with the RIU hotel diving manager who gave us permission to use a mooring near the hotel. This will allow us to moor the boat down south and travel by road each day back north to Sal Rei where we are living. But first we have to find the mooring and tie a buoy to it which will involve a bit of searching and some free-diving.

We also met with our new skipper - José who sailed from Sao Nicolau via Sal on his yacht. José and Pedrin have been working on establishing a whale research station on an uninhabited island off the coast of Sal Rei - a great location for humpbacks. All going to plan, we are hoping that this station and interpretive centre will be up and running by next year in time for the 2013 humpback breeding season.

Iago sparrow (Endemic) 
Sanderling(?) and a single turnstone

Whimbrel

Not an animal... help with spp ID please! 
Kentish Plover 

Greenshank

Neglected kestrel

Osprey

New wind-turbines
During the late afternoon myself and Darren did a bit of birding at the local beach - Praia Cabral.

Sunday, April 15, 2012

Black Flukes

This morning started off thundery and very calm by Boa Vista standards (sea state 3, 1-2m swell). During a heavy shower we collected one biopsy with a nice single approach. This is our third biopsy sample. The mother and calf pair were both sporting lovely all-black flukes. During our afternoon trip we tracked 2 adult whales in challenging conditions but lost them after about 15 minutes with no biopsy attempts or fluke images obtained. These were likely to be roving males which often form alliances. We called it a day when our fuel was running low and Darren spotted a massive humpback breaching on the horizon, pec-slapping and fluking... we had to leave it be.
Whale-watchers on board Tartaruga do Mar (lost beneath the swell)

Pedrin went on an angling boat about 60 miles southwest of Sal Rei towards a large bank that sits on the continuous shelf between the islands of Boa Vista and Maio (to the south). This is thought to be an important offshore area for breeding humpbacks. Unfortunately, there were no cetacean sightings but lots of white-faced storm petrels.

We are planning to spend some days on the south coast of the island in the coming days. We rarely get to spend time down there as it is a long spin from our base in Sal Rei, but we have extra fuel tanks and will moor the boat down there for a few days and travel by road. This will allow us to search less plied waters for whales. According to locals, there are lots of whales down south this year.
This is how we get the RIB from it's mooring!


Species list: loggerhead turtle, green turtle, osprey (2), Cape Verde shearwater (c.10), flying fish (>10), common kestrel (1), brown-necked raven (1).