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Greater than 330 fish species, as much as 35 new to science, present in Bolivia’s Madidi Nationwide Park

  • FISH

Sternarchorhynchus hagedornae—one among 330 species recognized in a brand new survey of freshwater fish variety of Madidi Nationwide Park in Bolivia. Credit score: Rob Wallace/WCS

The variety of fish species recorded in Madidi Nationwide Park and Pure Built-in Administration Space (PNANMI), Bolivia has doubled to a staggering 333 species—with as many as 35 species new to science—in response to a research performed as a part of the Madidi expedition led by the Wildlife Conservation Society. The outcomes are described within the newest situation of Neotropical Hydrobiology and Aquatic Conservation.

The research lists the fish species whose presence in Madidi has been confirmed, together with these recorded through the Madidi expeditions, and a compilation of species occurrences listed in earlier research, offering an estimate of the whole ichthyological richness for this protected space. The species record for the Madidi protected space consists of 35 attainable new species for science.

Species vary in measurement from the invasive arapaima (Arapaima gigas), a mouth respiratory big weighing in at greater than 200 kg and greater than 3 m lengthy, to the seasonally ample killifish (Anablepsoides beniensis) from the Rivulidae household present in swimming pools in pure savannas which are simply 1.5 cm lengthy. The record additionally consists of essentially the most engaging gamefish from the Amazon, the golden dorado (Salminus brasiliensis), in addition to migratory catfish from the Amazonian goliath catfish (Brachyplatystoma filamentosum) to the tiny chipi chipi pencil catfish whose large collective migration is a neighborhood phenomenon ( Trichomycterus barbouri). One other killifish (Orestias sp.) is present in a few of the highest Andean lakes at 4,300 m in Madidi, whereas within the stagnant ponds of the great Amazon electrical knife fish (Gymnotus carapo) and the swamp eel (Synbranchus madeirae), and within the fast-flowing streams of the Amazon headwaters, a number of species of bare catfish (Astroblepus spp.), together with possible a number of new species for science.

The 35 attainable new species for science embrace candidates of the genus Knodus, Microgenys, Moenkhausia, Characidium, Apareiodon, Brachyhypopomus, Ernstichthys (genus reported for the primary time in Bolivia), Astroblepus, Trichomycterus (together with one species lately described and named in honor of a pioneer French ichthyologist in Bolivia), and a three-barbled catfish (Cetopsorhamdia), a hanging pike cichlid (Crenicichla) and a captivating bumblebee catfish (Microglanis), amongst others.

The biodiversity surveys and subject analysis have been performed between 2015 to 2018 by specialists from the Wildlife Conservation Society (WCS), the Institut de Recherche pour le Développement de Montpellier (France) and the Nationwide Museum of Pure Historical past and the Ecology Institute of the Universidad Mayor of San Andres. Madidi might be the world’s most biologically various protected space resulting from a novel altitudinal gradient of virtually 6,000 m spanning the Tropical Andes and the Amazon.

For 4 years, the specialists performed in depth ichthyological sampling at 13 websites in Madidi Nationwide Park, utilizing totally different sampling strategies: electrofishing, gill nets, trawls, hook and line, and ichthyoplankton nets. Ichthyoplankton species have been recognized by genetic characterization (metabarcoding). A complete of 333 species distributed in 43 households and 13 orders have been recorded. This quantity doubles the beforehand identified ichthyofauna (161) in Madidi.

The biggest variety of species are discovered within the order Characiformes (139 species; 41.7%), adopted by Siluriformes (137 species; 41.1%), and Cichliformes (19 species; 5.7%), which collectively symbolize 88.6% of species richness. The remaining 11.4% is distributed in 10 different orders. The households with the very best variety of species are the characids (73 species; 21.9%), loricariids (36; 10.8%), heptapterids (21; 6.3%), pimelodids (21; 6.3%) and cichlids (19; 5.7%) .

Lead creator of the research, Guido Miranda, of the Wildlife Conservation Society stated “With an extension of 18,957.5 sq. kilometers (7,319 sq. miles), Madidi covers 1.3% of the Madeira River basin, however conserves 25% of the identified species within the basin Madidi additionally represents just one.8% of the Bolivian territory, however it conserves virtually 40% of the ichthyofauna recorded in Bolivia.This research has greater than doubled our data about fish variety on this unbelievable protected space, however with a number of sub-basins but to pattern within the park, that is solely the start.”

Dr. Rob Wallace, Senior Conservation Scientist on the Wildlife Conservation Society, chief of the Identidad Madidi expeditions, and coauthor, stated “Because of its nice variety of habitats, largely because of the altitudinal gradient from 184 meters (Heath River) to six,044 meters (Chaupi Orko Peak), Madidi is taken into account essentially the most biodiverse protected space on the planet.The Identidad Madidi initiative aimed to firmly set up this record-breaking standing for the park, whereas speaking the significance of Madidi to the Bolivian folks.That is the primary of a number of biodiversity abstract articles that the Bolivian scientists on the expedition are systematizing to share the outcomes of our efforts with Bolivia and the world.”

Extra data:
Guido Miranda-Chumacero, Ichthyofauna of the megadiverse Madidi Nationwide Park within the Bolivian Andean Amazon, Neotropical Hydrobiology and Aquatic Conservation (2022). DOI: 10.55565/nhac.gcja3363

Supplied by Wildlife Conservation Society

quote: Greater than 330 fish species, as much as 35 new to science, present in Bolivia’s Madidi Nationwide Park (2023, January 4) retrieved 4 January 2023 from https://phys.org/information/2023-01-fish-species-science -bolivia-madidi.html

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