Dr Kaya and Dr Oral return to Batman

(c) Münevver Oral

They were hoping to conduct research into the Batman River loach’s range and distribution, but fierce winter weather forced a rethink.

By Michael Edmondstone

In late December 2021, Dr Cüneyt Kaya and Dr Münevver Oral returned to the Batman – Diyarbakir region of Southeast Turkey. They were keen to conduct further research into the range and distribution of the Batman River loach, and wanted to get the work wrapped up before winter took hold. They arrived on December 18th to find snows had arrived unseasonally early. To add to the challenge, the streams were turbid and fast-flowing after heavy and relentless rain. They braved the icy waters for two days before accepting that finding the loach in these conditions was going to be practically impossible.

We caught up with them to learn more about the aims of this expedition, and what they ended up doing instead of the originally-planned field work.

What was the aim of the second expedition to the Han and Sarim streams?

The aim of the second expedition in Batman-Diyarbakir was to draw the range of the loach in both streams, and was mostly triggered by the info we received by local NGOs that there was a hydroelectric power plant (HEPP) due to be built in Sarim. Taking the weather conditions into account, we decided to carry out the expedition asap before the water level got higher due to the heavy rain and snow in the area.

What challenges did you face?

The biggest challenge was the extreme weather conditions: snow started as we were driving from Rize to Diyarbakir on the main motorway, and it kept snowing or raining heavily until the last three days in the area, regardless of what the weather forecast indicated previously.

The worst thing about winter expeditions is that the visibility [of the stream] is very low, due to turbidity, and the water level is high, thus the temperature is cold, which stimulates fish to find safe shelter for tough winter conditions. This is what happened in Diyarbakir and Batman last week.

Once again, we came to the conclusion that we were lucky when we first rediscovered the loach in Oct 2021: the water level was very low because of drought, as well as it being the end of summer. This may explain why previous researchers have failed to find the loach in the area.

We went through a few challenges: the car got stuck on a muddy road on the second day. Luckily, locals were very friendly and helpful and came with two tractors and saved us from the mud, as well as inviting us over to their houses for a hot cup of tea (free of charge, welcome to Turkish hospitality!).

Dr Kaya fishing in the icy Sarim stream (c) Münevver Oral
Dr Kaya fishing in the icy Sarim stream (c) Münevver Oral
A local donkey (c) Münevver Oral
A local donkey (c) Münevver Oral

What activities did you do during the expedition instead of the distribution assessments you were planning to do?

At the beginning of the expedition, we did not consider meeting with the district governors, due to time limitations and the priority of the range assessment. But, due to the extreme weather conditions, we focused on awareness activities throughout the entire trip.

We first started our meetings with the local governors and mayors in Sason (Batman), Kulp (Diyarbakir) and Lice (Diyarbakir) in the mornings. These districts were chosen based on the population density at the upper parts of the Batman Dam (Sason 30k, Lice 25k, Kulp 35k). In each of these meetings, we requested the local director of national education to join us to discuss the benefits of our activities for students and teachers, as well as ensure full collaboration by high school administrators. We carried out several seminars in high schools during the afternoons, and one seminar with a local NGO called SarimDer during the evening. Although being a small community, SarimDER is highly motivated to protect the precious fauna and flora of the entire valley, thus we received high interest by this community.

The seminar took more than 3 hours, with questions and explanations, and by far the most productive discussion of the entire expedition. Particularly, there are two highly motivated people, Emin Turhalli (a true nature lover – he lives almost fully organic) and Ahmet Inan (a lawyer volunteering for an NGO to help prevent the HEPP being established. Both of them are willing to do whatever it takes to protect the Sarim valley.

We met with representatives of TEMA, one of Turkey’s biggest wildlife protection NGOs, during the evenings in both Batman and Diyarbakir. We are still in touch with their representatives on a local scale and will be publishing a leaflet in the area to increase awareness of the loach rediscovery and the threats to the Sarim and Han streams. Once this is out in the surrounding states, TEMA will publish on their social media channels, which should give us a third round of publicity nationally (fingers crossed!).

How were these activities received by the people who came to listen to you speak?

The local director of national education, high school students and teachers were our audience during the seminars, which were between 50-80 people, up to 150 at the maximum.

Students were very curious and keen to learn more about the loach, and seeing their villages via drone received huge attention! We showed them recent photos of plastic pollution in the stream and asked them to guess where it was. Some were from the area and guessed the answer easily. This little game triggered their interest on how these pollutants ended up in stream and some told us they will be more careful of how they treat the water in the future.

Plastic pollution in the upper Han stream. © Münevver Oral
Plastic pollution in the upper Han stream. © Münevver Oral
Plastic pollution in the Han stream (c) Münevver Oral
Plastic pollution in the Han stream (c) Münevver Oral

Teachers asked for further readings and we sent our presentation to every school. At the end of the seminars, we made a deal with the students to spread the word about the loach and what they learned during the seminar . Given their interest, we hope that they will spread the word about the rediscovery and how to protect the ecosystem.

How do you think your awareness raising has changed people’s attitudes to the Batman River loach, and the local streams?

We framed our discussions based on the threats to the ecosystems in a much broader concept during the seminars, so we anticipate that young people will mostly change their attitudes towards illegal fishing, human-made pollution, HEPPs, and drought for the conservation of the ecosystems in long run.

Most of the young people didn’t know about ghost fishing. Through interactive talks with the students and NGOs, we anticipate that the seminars have changed their attitudes to the stream, the loach, and nature in general, in a much more responsible way.

Students listening during a seminar (c) Münevver Oral
Students and teachers of the Diyarbakır Lice high school listening during one of Dr Kaya and Dr Oral’s seminars. © Münevver Oral

What are your hopes on a local, national and international level for the Batman River loach?

Our rediscovery, the paper we will be writing, and the national and international news coverage should encourage local governors in Batman and Diyarbakir to protect the nature and ensure the sustainable use of the natural resources.

Unfortunately, there is no solid waste disposal plant in either of the districts that we carried out the expedition. Hazardous waste is currently hidden in locations decided by the local government, and the first step to protect both the soil and the water will be to built a specialist waste disposal plant in the area. HEPPs and dams constitute the major threats to the freshwater fish species, and we hope the construction of more dam and HEPPs in the area will be reassessed from an environmental point of view.

The biggest responsibility lies on the shoulders of the locals to protect their stream, valley and the nature accordingly. Throughout the expedition, we had a chance to visit Sarim valley and we were fascinated by the scenery of the landscape, where mountains were covered with snow and we could taste the best strawberries in our life, indicating the natural richness of the soil.

On the 14th December 2021, the minister of agriculture and forestry, Dr.Bekir Pakdemirli, announced plans for the protection of endangered species in Turkey. Taking this into consideration, we hope the Sarim and Sason valleys, including the Sarim and Han streams, will not face human-caused habitat degradation. This would ensure the Batman River loach’s continued existence in its very restricted habitat.

Internationally: our limited time in the area has indicated an enormous need for locals to be trained in the sustainable use of natural resources. This includes not only villagers and stakeholders but also local governors and officers. This is a perfect fit for an EU project. Cüneyt and I are keen to use the best available science and resources to protect the loach in its very limited habitat.

Last but not the least, we would like to thank everyone who made us feel home with their hospitality, namely:

Muhammed EVLICE (district governor of Lice, Diyarbakir)

Mustafa GÖZLET (district governor of Kulp, Diyarbakir)

Murat METE (district governor of Sason, Batman)

Naif KELES (local director of national education in Lice, Diyarbakir)

Fatih KAYA (local director of national education in Kulp, Diyarbakir)

Veysi BOZKURT (local director of national education in Sason, Batman)

Prof. Dr. Necmettin PİRİNÇÇİOĞLU (TEMA representative of Diyarbakir)

Mehmet Tahir ALTUĞ (TEMA representative of Batman)

Emin TURHALLI (The president of SarimDer association of cultural and natural heritage, NGO)

Ahmet İNAN (Diyarbakir Bar Association Lawyer)

Local people who saved us from the mud and local/national press

We caught up with Dr Kaya and Dr Oral after they returned from their December expedition to Batman – Diyarbakir.

FOUND! The Batman River loach

The Batman River loach (c) Rewild

FOUND! The Batman River loach has been rediscovered after nearly 50 years

It is the first of Shoal’s Lost Fishes to be rediscovered.

A Turkish research team have rediscovered populations of the critically endangered Batman River loach in two streams in southeast Turkey, the first time the tiny fish has been seen since 1974, and the first species rediscovery from Shoal’s Search for the Lost Fishes programme.

“When I first heard about the Search for the Lost Fishes project, I was very happy,” said Cüynet Kaya, associate professor with Recep Tayyip Erdogan University. “Moreover, two of the 10 most wanted fish species were distributed in my country. It is a very different feeling when you see naturalists from foreign countries caring about an endemic species in your country and making efforts to save it. As a freshwater fish taxonomist, I thought that I should do my best for this project, and fortunately our efforts resulted in finding the first lost endemic and critically endangered Batman River loach.”

After learning about the Search for Lost Fishes, Kaya and Münevver Oral, a research fellow with Recep Tayyip Erdogan University, set out to search for the small yellow-and-brown striped fish, which is the smallest loach species in the Middle East, and smaller than any loach species found in Europe. The tiny critter, growing up to 1.4 inches (or 36 millimetres) long, was once distributed around streams and tributaries of the Batman River, which is thought to take its name not from the caped crusader, but from the nearby Bati Raman mountain.

Dr Cüneyt Kaya and Dr Münevver Oral
Dr Cüneyt Kaya and Dr Münevver Oral

Expedition teams have searched the river underneath the historic Malabadi bridge and the lower parts of the Batman River, where the fish was first discovered, many times in the decades since the Batman River loach’s last sighting, without success. After analysing possible locations where the Batman River loach could survive, Kaya and Oral instead focused their search on the Sarim Stream, which is upstream of the Batman Dam. The team visited the stream and other headwaters of the Batman River, which are shallow, rocky and fast-flowing, the preferred habitat of the fish, in October and November.

“After finding the specimens, it seems that our lost fish has managed to survive despite the threats in the environment. It is now essential to conduct a detailed field study in the region in order to determine the species’ population density and distribution area. These data will play a key role in the correct determination of the conservation status of the species. We took the first step by finding this lost species – now is the time to act to protect it,” said Kaya.

Watch the film to learn more about the search. ©  Rewild. 

Kaya and Oral searched the streams using tight-weave nets that prevented the Batman River loach from slipping through. They found 14 fish in the Sarim Stream and another nine in the Han Stream.

Kaya and Oral said the population of the loach seems steady, but they are concerned about the effects of pollution, drought, and invasive species, and stressed that further study is needed to get a clearer understanding of the species’ total distribution.

“When we launched the Search for the Lost Fishes, we hoped that we would have the opportunity to celebrate days like this,” said Mike Baltzer, Shoal’s executive director. “There are so many lost and threatened fish and we are so happy that this little loach has been found, and hopefully we can now secure its future. This is the first species of Lost Fishes that has been rediscovered – hopefully the first of many”.

Populations of the Batman River loach nosedived after the construction of the Batman Dam in Turkey between 1986 and 1999, leading some scientists to fear it may have become extinct. Construction of the Batman Dam may have caused populations of the species to fall and, when Kaya and Oral sampled areas downstream of the dam, where the species was recorded in 1974, they were unable to find any individuals. The species’ habitat is now fragmented due to the dam, and the fish can no longer move downstream.

Kaya said: “It is obvious that the establishment of the dam caused shifts in biodiversity due to degradation of the lower part of the habitat needed by the species. I can say this because the species’ preferred habitat is shallow streams, with medium or fast flowing stones or gravel”.

Dr Kaya and Dr Oral in the field
Dr Cüneyt Kaya and Dr Münevver Oral in the field © Rewild

Kaya believes the other threats facing the species are likely to be pollution, drought, and invasive species. “As far as I know, there is no industrial pollution above the points where we identified the species. We must ensure that it does not happen in the future. However, anthropogenic pollution is intense in the region and local people are not conscious. It would be a good solution to raise awareness in the region with the help of NGOs”.

Jörg Freyhof, Europe’s leading ichthyologist and expert on these fishes, and who is working on the paper with Kaya, said: “We have searched for this fish for many years. It is obviously very rare, as it has not been found in the original locations that it was previously recorded. We even doubted that it existed. Cüneyt made massive efforts to finally confirm its existence. Its finding is a sign of hope, that this species has survived despite everything that has been done to kill the river”.

Shoal would love to see a local education programme to help inform people about how pollution can harm endemic fish species, along with collaboration with local government and businesses to encourage better care for the ecosystem. “It’s important to protect and manage all the remaining individuals and populations,” said Baltzer.

Several specimens before they were returned to the stream © Rewild