Cute but endangered: The dwarf raccoons of Cozumel

If you abrogation connected Cozumel, you mightiness beryllium fortunate capable to spot 1 of the island’s astir charming inhabitants, Procyon pygmaeus, oregon the Cozumel raccoon. It is not chartless for them to bent astir picnic sites looking for nutrient handouts, but tourists throwing these bold small animals scraps of nutrient — and tortilla chips look to beryllium a favourite — astir apt don’t recognize they are feeding 1 of the astir endangered mammals successful the world.

Procyon pygmaeus is classified arsenic 1 of lone 3 taxon of raccoon connected the planet. Here, we should instrumentality a infinitesimal to explicate the quality betwixt a taxon and a subspecies. A subspecies of immoderate carnal is an isolated colonisation that has been separated agelong capable to show immoderate unsocial differences. A subspecies might, for example, person grown longer fur for a colder situation oregon adapted its fare to exploit section availability.

Cozumel raccoons person learned to emotion tortilla chips, but feeding them to a critically endangered carnal is simply a precise atrocious idea. (Possiblynessie/Wikimedia Commons)

However, should this colonisation beryllium reunited with the “mother” population, they volition beryllium susceptible of breeding and presumably, fixed a fewer generations, immoderate differences volition person merged backmost into a azygous population. A taxon is simply a colonisation of animals that has grown truthful antithetic successful quality and behaviour that they tin nary longer successfully interbreed with different branches of the family.

A taxon isolated owed to insular dwarfism

The favoritism is not ever wide and mightiness beryllium taxable to technological debate. However, successful the lawsuit of the raccoon, scientists mostly hold determination are 22 subspecies of the communal raccoon successful the world, but lone 3 chiseled species. These are the communal raccoon (Procyon lotor), which is recovered each crossed North and Central America; the crab-eating raccoon (Procyon cancrivorus), which is autochthonal to Central and South America; and the Cozumel raccoon (Procyon pygmaeus), which is recovered lone connected Cozumel.

As is often the lawsuit with a colonisation of animals restricted to a comparatively tiny island, insular dwarfism has taken place, and the raccoons connected Cozumel are astir 18% shorter and 45% lighter than the communal raccoons recovered connected the mainland. As a result, they are often referred to arsenic the pygmy raccoon oregon the dwarf raccoon. It was the American zoologist C. Hart Merriam, backmost successful 1901, who archetypal identified Procyon pygmaeus arsenic a abstracted species, and this presumption has mostly been accepted ever since. In summation to its reduced size, the Cozumel colonisation has a wide achromatic pharynx band, a aureate yellowish process and reduced teeth. The species/subspecies statement present rests connected firmer grounds than elemental observation, and a survey of raccoon molecular information (mtDNA) by Katherine W. McFadden successful 2008 has secured the acceptance of the Cozumel colonisation arsenic a chiseled species.

The past of the species

How agelong does it instrumentality for a caller taxon to emerge? Cozumel separated from the mainland during the precocious Pleistocene, truthful Procyon pygmaeus is improbable to person been isolated for much than 122,000 years. The latest research, utilizing information from molecular timepiece studies, suggests that the divergence from the communal raccoon colonisation is much recent, dating determination betwixt 26,000 and 69,000 years ago.

In summation to their carnal appearance, beingness connected an land has changed the animals’ lifestyle, and they person adapted to a coastal and mangrove situation wherever crabs marque up betwixt 44% and 50% of their diet. This is seasonal, and portion crabs are abundant during the bedewed season, astatine different times the raccoons’ fare mightiness see much insects and seasonal fruits. They are mostly nocturnal, becoming progressive conscionable aft sunset, and females springiness commencement chiefly betwixt November and January, perchance with a 2nd litter during the summertime months.

Habitat nonaccomplishment and ecosystem damage

Sadly, the mangrove forests and coastal areas connected the westbound broadside of the island, wherever the raccoons erstwhile thrived, person been a favourite determination for caller hotels and resorts, causing a sizeable nonaccomplishment of wilderness. As their situation has shrunk, the Cozumel raccoon has go 1 of the astir endangered animals connected the planet. The champion estimation — and it has to beryllium an estimation due to the fact that the past major, authoritative and world number was conducted successful 2008 — is that the colonisation is astir apt down to less than 200 big animals.

The declining colonisation of Cozumel raccoons faces respective challenges, including predators, situation loss, storms, and the dangers of crossing well-traveled roads. (Scott Camazine/Wikimedia Commons)

The colonisation is not lone low, but arsenic the land develops, it has go progressively fragmented. Generally, the raccoons are astir galore successful the south, past successful tiny numbers successful the northbound (which is wherever tourists are astir apt to spot them) and person disappeared from overmuch of the halfway of the island. After the 2008 survey, the IUCN Red List classified Procyon pygmaeus arsenic “critically endangered,” a presumption that remains its authoritative designation today.

While the nonaccomplishment of situation is astatine the bosom of the raccoon’s decline, determination are different concerns. Roadkills instrumentality respective animals each year, and this is apt to summation arsenic the island’s roadworthy strategy is some extended and widened. Cozumel is besides regularly struck by hurricanes, which are apt to go much convulsive and much predominant arsenic the clime changes. Raccoons, peculiarly young and inexperienced animals, are known to beryllium killed during storms, portion those that past mightiness look to find their coastal situation devastated. It is documented that aft Hurricane Gilbert successful 1988, overmuch of the tiny colonisation of raccoons connected Passion Island disappeared.

Predators and existential threats 

The biggest menace connected the contiguous skyline mightiness beryllium to beryllium the summation successful the fig of feral and home cats and dogs. Such animals mightiness some hunt the raccoon and transmit diseases to them. While dogs person been connected the land for a while, home and semi-wild cats are a comparatively caller danger, and their interaction is uncertain. Boa constrictors, believed to person been released by a movie unit successful 1971, besides thrived connected the island, and the raccoons are a cleanable size for them to prey on.

One origin successful the animals’ favour is that, similar their mainland cousins, they are clever and adaptable. While the raccoons person adapted to a beingness of hunting crabs successful the mangroves, they person besides been seen successful the semi-evergreen forests and cultivation lands surrounding these preferred habitats. There is nary captive breeding programme astatine the moment, but specified a measurement mightiness beryllium taken successful the future. While taking animals retired of a tiny chaotic colonisation carries risks, Mexico does person a grounds of occurrence with captive breeding of wolves and the tiny volcano rabbits. For now, acquisition plays a captious relation successful the raccoon’s conservation, ensuring that some residents and tourists are alert of the raccoons’ peculiar presumption and however to attraction for them. That mightiness commencement by resisting the temptation to provender them those tasty but unhealthy tortilla chips.

Bob Pateman lived successful Mexico for six years. He is simply a librarian and teacher with a Master’s Degree successful History.