{"id":22306,"date":"2022-06-16T14:14:19","date_gmt":"2022-06-16T18:14:19","guid":{"rendered":"https:\/\/world.dan.org\/?post_type=dan_alert_diver&p=22306"},"modified":"2023-02-03T14:45:44","modified_gmt":"2023-02-03T19:45:44","slug":"deep-diving-for-fish","status":"publish","type":"dan_alert_diver","link":"https:\/\/world.dan.org\/id\/alert-diver\/article\/deep-diving-for-fish\/","title":{"rendered":"Menyelam dalam untuk mencari ikan"},"content":{"rendered":"
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LUIZ ROCHA, PH.D., TELAH MENJADI SEORANG PRIA DALAM MISI IKAN<\/span><\/strong> since he was a young boy exploring the waters in his small coastal hometown in Brazil. He investigated tidepools, had fish tanks when he was 5 years old, and was declared a future scientist by his third-grade teacher. It was always about the fish \u2014 and exploring the unknown. \u201cThe deeper the water, the more unknowns,\u201d Rocha said.<\/p>\n\n\n\n

When a dive instructor arrived in Rocha\u2019s hometown in 1989, he joined the first open-water class available. He became a divemaster so he could keep diving while not being able to afford his own gear. It was an unpaid job, but he could use the gear at no cost. While Rocha said he did some deep diving in those days that he wouldn\u2019t do now with formal training, those early deep dives were the start of the career he has today.  <\/p>\n\n\n\n

On some of those early dives in Brazil, he started noticing some fish that \u201clooked a little different.\u201d He sought answers for identification and eventually came to the U.S. in 1999 to get his doctorate at the University of Florida. The lab in which he worked had the tools he needed to look at DNA variation to determine if the fish were indeed different species.<\/p>\n\n\n\n

Rocha\u2019s objective was to study deep reefs (150 to 500 feet), but studying deep waters comes with challenges. Rocha went to several institutions where he found it difficult to be authorized or get the necessary support to do the type of diving required for his work. The dive support he needed was at the California Academy of Sciences (CAS).<\/p>\n\n\n\n

Rocha currently is the curator of ichthyology at CAS, where he maintains a collection of 2.5 million fish. He said to think of the specimen collection much like a library, but \u201cinstead of books, my library has fish jars.\u201d Each species is preserved in a jar of alcohol and has information associated with it, such as who collected it, where and when, and what kind of habitat it came from. All this information goes into an open-access database that is free to the public. The collection started in 1853 and is one of the world\u2019s largest.<\/p>\n\n\n\n

As part of his role at CAS, Rocha travels to various parts of the world to research deep reefs. On every expedition he tries to discover species never seen before to add to his collection. He has named 32 fish species to date, with 15 in his lab waiting to be formally named. \u201cWe know a lot about coral reefs,\u201d Rocha explained. \u201cA lot of people like to study them. But 99 percent of what we know about coral reefs comes from the top 100 feet because that is accessible using normal recreational gear. The bottom two-thirds of coral reefs are almost completely unknown \u2014 that is one of the main reasons I study them.\u201d  <\/p>\n\n\n\n

Rocha is the science leader of the CAS Twilight Dive Team. The team\u2019s divers train to dive to depths the average diver has never explored. While chasing a fish took Rocha to 503 feet, his deepest dive on record, the team prefers to max out at 500 feet. This limit is primarily because the decompression time becomes too long; they try to keep their total dive times between six and seven hours. CAS has one of the largest, most active dive teams of its kind.<\/p>\n\n\n\n

Training for the Twilight Dive Team is extensive, but they never take diving to these depths lightly. There is always a dive safety officer in the field who, in addition to overseeing the dive\u2019s safety aspects, is also usually a rebreather instructor and has the technical training to fix rebreathers in the field. <\/p>\n\n\n\n

The first dive of every expedition is 30 to 40 feet, where the team executes basic exercises and simulates various scenarios to build local memory. Rocha\u2019s experience and training allow him to do these dives without fear, but he admitted, \u201cThe 30 minutes before hopping in the water always has an air of anxiety, with everyone checking that everything is set up properly, and lots of thinking, concentration, and preparation.\u201d Being comfortable diving to these depths is critical because Rocha is not only exploring but also working.<\/p>\n\n\n\n

Rocha explained that his primary objective for his work is \u201cto make a difference in the world in terms of conservation.\u201d He is concerned about the fact that, for the most part, deep reefs are not protected. \u201cShallow reefs are more and more protected or, when not protected, are overfished. Both scenarios drive fisheries to deeper reefs. When people can\u2019t fish on shallow reefs, they go to unprotected deep reefs.\u201d  <\/p>\n\n\n\n

Rocha recognizes the role the public plays in conservation. \u201cTo protect these reefs, we need to show people the fantastic species they host,\u201d he said. \u201cIf I don\u2019t talk about these fish to the public, I won\u2019t have an impact.\u201d <\/p>\n\n\n\n

Selain publikasi ilmiahnya, Rocha telah menulis berbagai artikel opini untuk New York Times<\/em>dan ia sangat senang dengan perhatian media yang diberikan kepada spesies terbaru yang ia dan timnya temukan: ikan peri terselubung mawar (Cirrhilabrus finifenmaa)<\/em>. <\/p>\n\n\n\n

When asked to name his favorite fish, he responded that it was too hard to answer but then changed his mind and said that his current favorite is this newly found wrasse. Nongovernmental organizations in the Maldives, where Rocha\u2019s team found the wrasse, are already using the fish to make a case to protect deeper reefs.  <\/p>\n\n\n\n

Untungnya, bagi kita semua yang tidak memiliki pelatihan untuk menjelajahi terumbu karang yang dalam, Rocha adalah seorang fotografer yang berbakat. Ikuti akun Instagram dan Twitter @Coralreeffish untuk melihat sekilas beberapa ikan yang ia temui saat menyelam di perairan dalam.<\/p>\n<\/div>\n\n\n\n

\n
\"Luiz
Foto: Justin Grubb<\/figcaption><\/figure>\n\n\n\n

Luiz Rocha<\/strong><\/p>\n\n\n\n

Kampung halaman:
Jo\u00e3o Pessoa, Brazil<\/p>\n\n\n\n

Bertahun-tahun Menyelam: 33<\/p>\n\n\n\n

Tujuan Menyelam Favorit:
I have too many favorites! It depends on the category \u2014 I have different favorite places for coral reefs, wrecks, diversity, etc.<\/p>\n\n\n\n

Mengapa saya menjadi Anggota DAN:
Saya telah menjadi anggota DAN sejak pertengahan tahun 1990-an karena saya sering menyelam dan membutuhkan asuransi. Penting untuk mengetahui bahwa Anda terlindungi, terutama saat bepergian.<\/p>\n\n\n\n

\"Cirrhilabrus
Ini Cirrhilabrus wakanda<\/em> menunjukkan warna-warnanya yang cerah di kedalaman 260 kaki di lepas pantai Zanzibar.
Foto: Luiz Rocha<\/figcaption><\/figure>\n\n\n\n
\"Sepasang
Rocha melihat sepasang Pseudanthias fasciatus<\/em> pada ketinggian 312 kaki di Filipina.
Foto: Luiz Rocha<\/figcaption><\/figure>\n\n\n\n
\"Seekor
A Cirrhilabrus finifenmaa<\/em> berenang di ketinggian 230 kaki di Maladewa. 
Foto: Luiz Rocha<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

Rocha explained that his primary objective for his work is \u201cto make a difference in the world in terms of conservation.\u201d<\/span><\/em><\/p>\n\n\n\n

<\/p>\n<\/div>\n<\/div>\n\n\n\n

\u00a9 Alert Diver<\/em> \u2014 Q2 202<\/p>","protected":false},"excerpt":{"rendered":"

LUIZ ROCHA, PH.D., HAS BEEN A MAN ON A FISH MISSION since he was a young boy exploring the waters in his small coastal hometown in Brazil. 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