30 September 2013
29 September 2013
28 September 2013
Caterpillar
These colourful caterpillars (likely of the spurge hawk-moth Hyles euphorbiae) have just appeared in our garden. There is plenty of Euphorbia plants in the Galaxidi area, and that is what these artworks of nature seem to target.
(Photo by S. Bonizzoni, Galaxidi, Greece)
27 September 2013
Stargazer
This stargazer Uranoscopus scaber may not look handsome to some, but it sure has an inspiring common name :-)
It is actually an elegant and beautiful fish when observed in its natural element. In addition, it has an acoustic apparatus that produces acoustic as well as electric pulses.
The more one knows about just any animal species, the more one finds it interesting and fascinating. Judging based on physical appearance (out of water) cuts off the amazing universes behind.
(Photo by G. Bearzi, on a trammel netter in Itea, Greece)
26 September 2013
Fishermen offers
Thirty-four of 100 fishermen (97 men, 3 women) interviewed in the Gulf of Corinth made some kind of offer to Silvia. For fun, she kept track of them in her database. She was offered:
coffee - 10 times
coffe and dinner - once
a drink - 6 times
cigarette - 8 times
cigarette and fish - once
cigarette and lunch - once
figs - once
fish - 3 times
shells - 3 times
Silvia accepted the shells and a couple of coffees offered by seniors. None of the interviewed fishermen behaved unpleasantly, and most were very kind.
The trammel fisherman in the photo above washes a shell to be offered to the interviewer.
(Photo by G. Bearzi, Aliki, Greece)
25 September 2013
Is that true?
The expression of Silvia as a person met in Agios Spiridon, Greece, tells her that fish in the Gulf of Corinth has declined over the past decades because of... earthquakes.
That is a story we heard a few times. Has such belief been generated by some misinformed TV programme? While the Gulf of Corinth is one of several seismic areas in Greece, earthquakes in this area certainly aren't a recent phenomenon.
Fish was plentiful until a few decades ago, and earthquakes are an unlikely reason behind its decline. The majority of fishermen interviewed in the Gulf of Corinth assert the most likely candidate to explain such negative trend is overfishing by trawlers and seiners.
(Photo by G. Bearzi)
24 September 2013
23 September 2013
Fisherman interview #100
Today Silvia interviewed her 100th fisherman in the Gulf of Corinth, Nikos Moutsakitis of Glifada. Apart from answering all questions, he reported the interesting story of a dolphin who came to die in the port.
Overall, a total of 106 artisanal fishermen were approached (6 declined) across 44 ports and moorings throughout the Gulf. We collected information including damage caused by dolphins, occurrence of dolphin bycatch in fishing gear, sightings and captures of rare species, the perceived impact of polluting industries, fish farming and commercial fishing, and much more (our standard questionnaire contains 25 questions).
Silvia was able to establish friendly relationships, and several fishermen now know about our work and can be contacted again for collaborative studies – or simply to drink an ouzo together.
In future blogs we will post more about this work, as we find the world of artisanal fishing truly fascinating. While we are aware that fishing has caused so much damage – worldwide – small-scale fishing with traditional boats of the kind found in the Gulf of Corinth has little if anything to do with the destruction caused by purse seiners, bottom trawlers and the like.
Fishermen, as a category, are indeed as diverse as "farmers" or "scientists". It may be the 80-year old owner of a 5 m wooden boat, the seasonal immigrant working on a seiner for pennies, or the businessman who counts the money made by his supertrawler wiping out someone elses' food resources and future off the coast of West Africa.
(Photo by G. Bearzi)
Wanna be a marine biologist?
A National Geographic "Ocean Views" article by Maddalena Bearzi, a member of the DBC research team, attempts to answer the question.
READ THE ARTICLE HERE
In the DBC web site there is a page that offers similar advice to students who aim to become cetacean researchers:
http://www.dolphinbiology.org/students.htm
Finally, a blog by another member of the DBC research team, Nathan Furey, offers more specific advice to those who are serious about pursuing a career in this field:
http://survivinggradschoolecology.blogspot.ca/p/posts.html
(Photo of Maddalena by Charles Saylan / Ocean Conservation Society)
22 September 2013
21 September 2013
Yaya from above
The one Risso's dolphin in the Gulf of Corinth, photographed while she is swimming under the bow of our inflatable.
Like her striped and common dolphin associates, Yaya enjoys bowriding when she is in the right mood (also see THIS POST).
On other occasions, however, the three species are busy doing other things, and they may not feel like bowriding at all.
(Photo by G. Bearzi)
20 September 2013
19 September 2013
18 September 2013
17 September 2013
16 September 2013
Fast cargo, no riding
We encounter this cargo ship operated by Hellenic Seaways almost every time we make a survey in the Gulf of Corinth. It is a very fast ship, and so far dolphins were never seen riding her bow as they often do with slower ships. There seems to be a "speed limit" for bowriding.
(Photo by S. Bonizzoni)
15 September 2013
Rion-Antirion bridge
The 1.9 km wide four-pylon bridge crossing the Rion-Antirion strait, the western 'door' to the Gulf of Corinth in Greece.
(Photo by G. Bearzi)
14 September 2013
Counting the boats
To get an idea of the percentage of fishermen and boats covered by our interviews, we eventually decided to assess the whole fishing fleet of the Gulf of Corinth. We classified all the fishing boats operating nets and longlines across about 40 ports and moorings. That gave us a chance of seeing a variety of fishing environments, talking to locals and interviewing more fishermen along the way.
(Photo by G. Bearzi, Loutraki, Greece)
13 September 2013
12 September 2013
11 September 2013
10 September 2013
A deepwater squid: abandoned dolphin prey?
Yesterday we were with striped dolphins when this amazing deepwater squid appeared at the surface. Dead, but very fresh and possibly just killed by the dolphins themselves.
As the dolphins moved away, we took some photos of this curious animal and then decided to take it home and... taste it. The animal, however, turned out to be made of little more than water. Contrary to other cephalopods used for human consumption, it almost completely evaporated, leaving only a spoon of gelatinous substance in the pan. It was like cooking a jellyfish.
Was the squid killed by the dolphins "for fun" (as they sometimes do with Mediterranean jelly, see THIS POST), but disregarded as a potential food item?
We shall investigate, and identify the species (Histioteuthis sp.?). We have never seen such a squid before, and while prey (e.g. European conger Conger conger) is sometimes abandoned at the surface by bottlenose dolphins, we never observed that behaviour with striped dolphins. Maybe the squid wasn't really killed by them... but having found it freshly dead in the middle of a dolphin group makes us wonder.
(Photos by G. Bearzi, Gulf of Corinth, Greece)
09 September 2013
08 September 2013
Risso's and striped dolphins bowriding
Yesterday we encountered again the one Risso's dolphin living in the Gulf of Corinth. It is the second time this year.
We were following a group of striped dolphins when a ship passed by. In front of its bow we recognized the familiar silhouette of Yaya, who was bowriding together with several other striped dolphins.
Like the smaller dolphins, Yaya could leap and swim at a speed of 17 km/h. The group went on bowriding for several minutes before they separated from the ship.
We managed to photograph Yaya's dorsal fin and confirm her identification, before a strong wind forced us back to the port.
(Both photos by S. Bonizzoni)
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