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The Forgotten Fish of the World

The Forgotten Fish of the World

THE WORLD'S FORGOTTEN FISH

The 23 February 2021, WWF released a report "The Forgotten Fish of the World". This report shows that nearly one-third of the world's #8217 freshwater fish species are threatened with #8217 extinction. Madagascar, two endemic freshwater fish have disappeared.

Why these disappearances ?

It #8217 is often because of dam construction on rivers to drain wetlands. There is also the removal of #8217 too much water #8217 for irrigation #8217. Then the release of #8217 too much untreated waste, unsustainable fisheries. The introduction #8217 invasive and non-native species #8217 are also the causes. And finally and not the least : #8217 worsening the effects of climate change.

The Forgotten Fish of the World – Madagascar

According to The report “The Forgotten Fish of the World”, 80 freshwater fish species are #8217 already extinct in the world, two of them in Madagascar : the Ptychochromis onilahy (Kotro) and the Pantanodon madagascariensis, enrolled in the IUCN Red List en 2016.

2 freshwater fish endemic to Madagascar

  • The Ptychochromis onilahy

It #8217 was an endemic fish in southwestern Madagascar. He lived in the Onilahy River, influential area of the #8217;Amoron-#8217;i Onilahy. Despite several recent visits to the region, this species #8217 has not been recorded since 1962. In fact, it was on this date that the only five known specimens were collected.

They represent the only known material collected in the Onilahy River. It is classified as extinct by the IUCN #8217. It should be noted that his initial classification was made before his official description. It has therefore been listed as the temporary name of Ptychochromis sp.

The causes of its disappearance are the destruction of their habitats due to deforestation, competition with other introduced fish species including Tilapias and overfishing. Indeed, more resilient and resilient fish such as Tilapia invade the living areas of the Ptychorochromis o., which has a negative impact on their development and has undoubtedly contributed to their extinction.
The different lakes, Marsh, Onilahy River, forests along the river, the wetlands in the Amoron'i Onilahy Protected Area form the Ramsar site in Onilahy. It is home to 27 mammal species ; 56 species of reptiles, 79 bird species including waterbirds ; and the fish species Allenbatrachus meridionalis, also listed on the IUCN Red List. These wetlands have always been threatened by deforestation (for #8217 agriculture and coal production).

  • The Pantanodon madagascariensis

As to the Pantanodon madagascariensis, it was an endemic fish from eastern Madagascar, rivers on the eastern slopes between Mahavelona and Fenoarivo and in the Eastern Fenerve district.

The reasons for its extinction are the destruction of wetlands, converted to rice paddies as well as competition with other species in the same habitat, including Gambusia, which is an introduced species.

As freshwater and species in them disappear, there is dysfunction of freshwater ecosystems around the world. We know that fresh water is a source of drinking water, and irrigate our agricultural fields. Healthy freshwater ecosystems are also essential to combating climate change through carbon storage functions. In terms of production, Africa accounted for 25 % production of freshwater #8217 fish worldwide, either 3 million tons (FAO 2020).

What are the possible solutions ?

The solution recommended in the "Forgotten Fish of the World" report is to implementing an emergency #8217 recovery plan for freshwater biodiversity #8217, developed by freshwater scientists and experts around the world.

This approach will need to include the following pillars :

  • allow rivers to flow more naturally,
  • improving the quality of fresh water,
  • protecting and restoring critical habitats,
  • end overfishing and unsustainable practices,
  • prevent and control invasions of non-native species and protect free-flowing rivers,
  • and remove obsolete dams.

(Source : WWF Madagascar – 23/02/2021)

Concerned about #8217 environment and sustainable development, Coco Lodge Majunga urges us to preserve Madagascar's unique biodiversity.

By #CocoLodgeMajunga

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  • One organizer of events and conferences with 3 meeting rooms that can accommodate up to 90 people. We can receive themed lunch/dinner, engagement, wedding, anniversary, boy-girl stag, marriage proposal, …
  • A travel and tourism services company (License C),
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