Английская Википедия:Island gigantism

Материал из Онлайн справочника
Перейти к навигацииПерейти к поиску

Шаблон:Short description

Файл:Deinogalerix Gargano fauna.jpg
Size comparison of the giant gymnure (moonrat) Deinogalerix from the Late Miocene of Gargano, Italy, with a European hedgehog.

Island gigantism, or insular gigantism, is a biological phenomenon in which the size of an animal species isolated on an island increases dramatically in comparison to its mainland relatives. Island gigantism is one aspect of the more general "island effect" or "Foster's rule", which posits that when mainland animals colonize islands, small species tend to evolve larger bodies, and large species tend to evolve smaller bodies (insular dwarfism). This is itself one aspect of the more general phenomenon of island syndrome which describes the differences in morphology, ecology, physiology and behaviour of insular species compared to their continental counterparts. Following the arrival of humans and associated introduced predators (dogs, cats, rats, pigs), many giant as well as other island endemics have become extinct (e.g. the dodo and Rodrigues solitaire, giant flightless pigeons related to the Nicobar pigeon). A similar size increase, as well as increased woodiness, has been observed in some insular plants such as the Mapou tree (Cyphostemma mappia) in Mauritius which is also known as the "Mauritian baobab" although it is member of the grape family (Vitaceae).

Possible causes

Файл:Island Gigantism- A Growing Projection.png
Diagram displaying the change in size of weta species in two ecosystems. The size and population of weta are affected by predation. Rats introduced on the mainland began to prey on weta, reducing their population; weta shrank in response. On an island isolated from predation, such as Little Barrier Island, weta have a dense population and have grown to a massive size. Insular species of giant weta are the only ones not facing extinction. As weta grow over time, bird predation declines.Шаблон:Citation needed

Large mammalian carnivores are often absent on islands because of insufficient range or difficulties in over-water dispersal. In their absence, the ecological niches for large predators may be occupied by birds, reptiles or smaller carnivorans, which can then grow to larger-than-normal size. For example, on prehistoric Gargano Island in the Miocene-Pliocene Mediterranean, on islands in the Caribbean like Cuba, and on Madagascar and New Zealand, some or all apex predators were birds like eagles, falcons and owls, including some of the largest known examples of these groups. However, birds and reptiles generally make less efficient large predators than advanced carnivorans.

Since small size usually makes it easier for herbivores to escape or hide from predators, the decreased predation pressure on islands can allow them to grow larger.[1]Шаблон:Efn Small herbivores may also benefit from the absence of competition from missing types of large herbivores.

Benefits of large size that have been suggested for island tortoises include decreased vulnerability to scarcity of food and/or water, through ability to survive for longer intervals without them, or ability to travel longer distances to obtain them. Periods of such scarcity may be a greater threat on oceanic islands than on the mainland.[2]

Thus, island gigantism is usually an evolutionary trend resulting from the removal of constraints on the size of small animals related to predation and/or competition.[3] Such constraints can operate differently depending on the size of the animal, however; for example, while small herbivores may escape predation by hiding, large herbivores may deter predators by intimidation. As a result, the complementary phenomenon of island dwarfism can also result from the removal of constraints related to predation and/or competition on the size of large herbivores.[4] In contrast, insular dwarfism among predators more commonly results from the imposition of constraints associated with the limited prey resources available on islands.[4] As opposed to island dwarfism, island gigantism is found in most major vertebrate groups and in invertebrates.

Territorialism may favor the evolution of island gigantism. A study on Anaho Island in Nevada determined that reptile species that were territorial tended to be larger on the island compared to the mainland, particularly in the smaller species. In territorial species, larger size makes individuals better able to compete to defend their territory. This gives additional impetus to evolution toward larger size in an insular population.[5]

A further means of establishing island gigantism may be a founder effect operative when larger members of a mainland population are superior in their ability to colonize islands.[6]

Island size plays a role in determining the extent of gigantism. Smaller islands generally accelerate the rate of evolution of changes in organism size, and organisms there evolve greater extremes in size.[7]

Examples

Examples of island gigantism include:

Mammals

Many rodents grow larger on islands, whereas carnivorans, proboscideans and artiodactyls usually become smaller.

Eulipotyphlans

Example Binomial name Native range Current status Continental relative
Balearic giant shrew Nesiotites hidalgo Majorca and Menorca Extinct (3000-2000 BC) Файл:Neomys anomalus.jpg
Red-toothed shrews
Sardinian giant shrew Asoriculus similis Sardinia and Corsica Extinct (Holocene)
Sicilian giant shrew Asoriculus burgioi Sicily Extinct (Early Pleistocene)
Файл:Deinogalerix Gargano fauna.jpg
Deinogalerix
Deinogalerix spp. Gargano Island Extinct (Late Miocene) Файл:Hylomys suillus - Naturmuseum Senckenberg - DSC02077a.JPG
Moon rats

Rodents

Example Binomial name Native range Current status Continental relative Insular / mainland
length or mass ratio
Blunt-toothed giant hutia Amblyrhiza inundata Anguilla and Saint Martin Extinct (Pleistocene) Файл:Hoplomys gymnurus2.jpg
Neotropical spiny rats
Larger Jamaican giant hutia Clidomys osborni Jamaica Extinct (Late Pleistocene)
Plate-toothed giant hutia Elasmodontomys obliquus Puerto Rico Extinct (c. 1 AD)
Twisted-toothed mouse Quemisia gravis Hispaniola Extinct
Arboreal giant hutia[8] Tainotherium valei Puerto Rico Extinct
Lesser Jamaica giant hutia Xaymaca fulvopulvis Jamaica Extinct
Majorcan giant hamsters Apocricetus darderi

Tragomys macpheei
Majorca Extinct Apocricetus alberti[9]

Cricetus kormosi[10]
Файл:Hattomys gargantua Naturalis.JPG
Gargano giant hamster
Hattomys gargantua Gargano Island Extinct
Файл:St Kilda field mouse (Apodemus sylvaticus hirtensis).png
St Kilda field mouse
Apodemus sylvaticus hirtensis St Kilda Least Concern Файл:ApodemusSylvaticus.jpg
Wood mouse
MR ≈ 2 [11]
Файл:Rhagamys orthodon lower hemimandibles, Pleistocene of Corsica.jpg
Hensel's field mouse
Rhagamys orthodon Corsica and Sardinia Extinct (After 1300 BC)
Файл:Canariomys bravoi.jpg
Tenerife giant rat
Canariomys bravoi Tenerife Extinct (Late Pleistocene) African rufous-nosed rats
Файл:Canariomys tamarani fossils.JPG
Gran Canaria giant rat
Canariomys tamarani Gran Canaria Extinct (before AD 1500)
Formentera black-tailed garden dormouse Eliomys quercinus ophiusae Formentera Rare (Introduced by humans)[12] Файл:Eliomys quercinus01.jpg
Garden dormouse and
other Leithiinae dormice
Файл:Hypnomys.png
Balearic giant dormice
Hypnomys spp. Mallorca & Menorca Extinct (Holocene)
Leithia melitensis
Leithia melitensis
Sicilian-Maltese giant dormice
Leithia cartei Sicily and Malta Extinct
Leithia melitensis
Файл:Topillo de las Orcadas.jpg
Orkney vole
Microtus arvalis orcadensis Orkney Islands Vulnerable Файл:Feldmaus Microtus arvalis.jpg
Common vole and
other meadow voles
Файл:Mikrotia magna Naturalis 2.JPG
Gargano giant voles
Mikrotia magna

M. maiuscula

M. parva
Gargano Island Extinct (Early Pliocene)
Файл:MusMuralisSmit.jpg
St Kilda house mouse
Mus musculus muralis St Kilda Extinct (c. AD 1930) Файл:Mouse white background.jpg
House mouse

Flores giant rat
Papagomys armandvillei Flores Near Threatened Файл:Rattus rattus03.jpg
North African black rat
and other true rats
Sulawesi giant rat Paruromys dominator Sulawesi Least Concern
Admiralty giant rat Rattus detentus Manus Island Unknown / Likely threatened[13]
Congreso black rat population[14] Rattus rattus Isla del Congreso Least Concern
Channel Islands deer mice Peromyscus anyapahensis

P. nesodytes
Northern Channel Islands of California Extinct (c. 6000 BC) Файл:DiGangi-Deermouse.jpg
North American deer mouse
Файл:Stertomys laticrestatus.jpg
Gargano giant dormouse
Stertomys laticrestatus[15] Gargano Island Extinct Файл:7schlaefer.jpg
Glirinae dormice

Lagomorphs

Example Binomial name Native range Current status Continental relative
Файл:Nuralagus NTy.jpg
Minorcan giant lagomorph
Nuralagus rex Minorca Extinct (Middle Pliocene) Alilepus (?)

Trischizolagus (?)
Prolagus imperialis Gargano Island Extinct Файл:Ochotona pallasi.jpg
Pikas
Файл:Prolagus3.jpg
Sardinian pika
Prolagus sardus Corsica, Sardinia and Tavolara Extinct (c. AD 1800)

Primates

Example Binomial name Native range Current status Continental relative
Hispaniola monkey Antillothrix bernensis Hispaniola Extinct (before AD 1600) Файл:Callicebus lugens.jpg
Cheracebus
Haitian monkey Insulacebus toussaintiana Southwestern Haiti Extinct
Файл:Paralouatta marianae skull.jpg
Cuban monkeys
Paralouatta marianae[16]

P. varonai[16]
Cuba Extinct (Pleistocene)
Jamaican monkey Xenothrix mcgregori Jamaica Extinct
Файл:Archaeoindris fontoynonti.jpg
Gorilla lemur
Archaeoindris fontoynontii Central Madagascar Extinct (c. 350 BC) Файл:Galago senegalensis.jpg
Lorisoids
Файл:Archaeolemur edwardsi.jpg
Baboon lemurs
Archaeolemur spp.

Hadropithecus spp.
Madagascar Extinct (before AD 1280)
Файл:Babakotia radofilai.jpg
Sloth lemurs
Babakotia spp.

Palaeopropithecus spp.
Western and Central Madagascar Extinct (c. AD 1500)
Файл:Megaladapis.jpg
Koala lemurs
Megaladapis edwardsi

M. grandidieri

M. madagascariensis
Madagascar Extinct (AD 1280–1420)

Carnivorans

Example Binomial name Native range Current status Continental relative
Файл:D2627 Megalenhydris.jpg
Sardinian giant otter
Megalenhydris barbaricina Sardinia Extinct (Late Pleistocene) Файл:Otters at feeding time 2004 SMC.jpg
Otters
Файл:Cryptoprocta Ferox.JPG
Fossa
Cryptoprocta ferox Madagascar Vulnerable Файл:Herpestes ichneumon Египетский мангуст, или фараонова крыса, или ихневмо́н.jpg
Mongooses
Файл:Fossa de les cavernes.png
Giant fossa
Cryptoprocta spelaea Madagascar Extinct (before AD 1400)

Birds

Stem birds

Example Binomial name Native range Current status Continental relative
Файл:Balaur bondoc as avialan.jpg
Balaur
B. bondoc Hateg Island Extinct (Late Cretaceous) Файл:Jeholornis mmartyniuk wiki.jpg
Jeholornis[17]
Файл:Gargantuavis philoinos femur.JPG
Gargantuavis
G. philohinos Ibero-Armorican Island Extinct (Late Cretaceous) Файл:Patagopteryx deferrariisi.jpg
Patagopteryx (?)

Ratites

Example Binomial name Native range Current status Continental relative
Файл:Apteryx australis - Swedish Museum of Natural History - Stockholm, Sweden - DSC00615.JPG
Kiwis
Apterygidae New Zealand Variable ProapteryxШаблон:Efn
Файл:Aepyornis maximus (pajaroelfantgigante).png
Greater elephant birds
Aepyornithidae
Madagascar Extinct (c. AD 1700)
Файл:Mullerornis agilis.jpg
Lesser elephant birds
Mullerornithidae Madagascar Extinct (c. AD 1260)
Файл:Dinornis novaezealandiae.png
Giant moas
Dinornithidae
New Zealand Extinct (c. AD 1450) Файл:Tinamus majorPCSL00504B.jpg
Tinamous
Файл:Euryapteryx.jpg
Lesser moas
Emeidae New Zealand Extinct (c. AD 1460)
Файл:Megalapteryx.png
Upland moas
Megalapterygidae New Zealand Extinct (c. AD 1300)

Waterfowl

Example Binomial name Native range Current status Continental relative
New Zealand musk duck Biziura delautouri New Zealand Extinct (after AD 1500) Файл:Biziura lobata - Sandford.jpg
Australian musk duck
Файл:Cnemiornis.jpg
New Zealand geese
Cnemiornis calcitrans

C. gracilis
New Zealand Extinct Файл:Cereopsis novaehollandiae 2.jpg
Cape Barren goose
Файл:Garganornis ballmanni (reconstruction by Stefano Maugeri).jpg
Garganornis
G. ballmanni Gargano and Scontrone islands Extinct (Late Miocene) Файл:Greylag Goose - St James's Park, London - Nov 2006.jpg
Geese[18]
Файл:ChelychelynechenBunt.jpg
Turtle-jawed moa-nalo
Chelychelynechen quassus Kauai Extinct (c. AD 1000) Файл:Pacific Black Duck (Anas superciliosa) RWD2.jpg
Dabbling ducks
Файл:Moa Nalo Maui Nui.JPG
Small-billed moa-nalo
Ptaiochen pau Maui Extinct (c. AD 1000)
Файл:Moa Nalo Maui Nui.JPG
Large-billed moa-nalo
Thambetochen chauliodous Maui Nui Extinct (c. AD 1000)
Файл:Thambetochen xanion.jpg
O'ahu moa-nalo
Thambetochen xanion O'ahu Extinct (c. AD 1000)
Файл:Cygnus falconeri giant swan .jpg
Giant swan
Cygnus falconeri Sicily and Malta Extinct (Middle Pleistocene) Файл:Mute swan Vrhnika.jpg
Mute swan
Scarlett's duck Malacorhynchus scarletti New Zealand Extinct (after AD 1500) Файл:Malacorhynchus membranaceus -Central Park Zoo, New York, USA-8a.jpg
Pink-eared duck

Pangalliformes

Example Binomial name Native range Current status Continental relative
Pile-builder megapode Megapodius molistructor New Caledonia and Tonga Extinct (c. 1500 BC) Файл:Megapodius reinwardt Cairns.jpg
Scrubfowl
Megavitiornis Megavitiornis altirostris Fiji Extinct Файл:Flickr - Rainbirder - Ceylon Junglefowl (Gallus lafayetii) Male.jpg
Galliformes
Файл:Sylviornis.PNG
Sylviornis
Sylviornis neocaledoniae New Caledonia and Isle of Pines Extinct

Gruiformes

Example Binomial name Native range Current status Continental relative
Файл:AphanapteryxBonasia.JPG
Red rail
Aphanapteryx bonasia Mauritius Extinct (c. AD 1700) Файл:Rallus caerulescens00.jpg
Rails
Файл:Hawkins's rail.jpg
Hawkins' rail
Diaphanapteryx hawkinsi Chatham Islands Extinct (c. AD 1900)
Файл:Nesotrochis debooyi.jpg
Antillean cave rail
Nesotrochis debooyi Puerto Rico and Virgin Islands Extinct
Cuban cave rail Nesotrochis picapicensis Cuba Extinct
Haitian cave rail Nesotrochis steganinos Hispaniola Extinct
Файл:Porphyrio hochstetteri -Tiritiri Matangi Island-8b-3c.jpg
South Island takahē
Porphyrio hochstetteri South Island, New Zealand Endangered
Файл:North Island Takahē.jpg
North Island takahē
Porphyrio mantelli North Island, New Zealand Extinct (before AD 1900)
Файл:Aptornis BW.jpg
Adzebills
Aptornis defossor

A. otidiformis
New Zealand Extinct Файл:CorethruraInsularisKeulemans.jpg
Madagascar flufftail[19]
Файл:Fulica chathamensis 1 1896.jpg
Chatham coot
Fulica chathamensis Chatham Islands Extinct (after AD 1500) Файл:Red-knobbed coot (Fulica cristata) non-breeding.jpg
Red-knobbed coot
and other coots
Файл:Fulica newtoni.jpg
Mascarene coot
Fulica newtonii Mauritius and Réunion Extinct (c. AD 1700)
New Zealand coot Fulica prisca New Zealand Extinct (after AD 1280)
Файл:Porphyrio coerulescens.png
Réunion swamphen
Porphyrio coerulescens Plaine des Cafres, Réunion Extinct (c. AD 1730) Файл:African Purple Swamphen.jpg
Purple swamphens

Pigeons

Example Binomial name Native range Current status Continental relative
Файл:Natunaornis gigoura e.jpg
Viti Levu giant pigeon
Natunaornis gigoura Viti Levu, Fiji Extinct Файл:Western Crowned Pigeon (Goura cristata) in TMII Birdpark.jpg
Crowned pigeons
Kanaka pigeon Caloenas canacorum New Caledonia Extinct (c. 500 BC) Файл:Nicobar Pigeon 820.jpg
Nicobar pigeon
Файл:Pezophaps solitaria recreation.jpg
Rodrigues solitaire
Pezophaps solitaria Rodrigues Extinct (before AD 1778)
Файл:DodoMansur cutted.png
Dodo
Raphus cucullatus Mauritius Extinct (c. AD 1662)

Birds of prey

Example Binomial name Native range Current status Continental relative
Liko Cave golden eagle Aquila chrysaetos simurgh Crete Extinct (Late Pleistocene) Файл:GoldenEagle-Nova.jpg
Golden eagle
Giant crab-hawk[20] Buteogallus borrasi Cuba Extinct Файл:Buteogallus urubitinga NBII.jpg
Great black hawk
and other hawks
Giant hawk Gigantohierax sp. Cuba Extinct
Titan-hawk Titanohierax gloveralleni Cuba, Hispaniola and the Bahamas Extinct
Jamaican caracara Caracara tellustris Jamaica Extinct Файл:Crested Caracara JCB.jpg
Caracaras
Eyles' harrier Circus eylesi New Zealand Extinct (c. AD 1000) Файл:Circus approximans - Peter Murrel.jpg
Swamp harrier
Файл:Garganoaetus freudenthali.jpg
Gargano Island eagles
Garganoaetus freudenthali

G. murivorus
Gargano Island Extinct (Late Miocene) Aquila delphinensis
Файл:Haast1.jpg
Haast's eagle
Hieraaetus moorei New Zealand Extinct (c. AD 1400) Файл:Little Eagle flight gore jun06.jpg
Little eagle
Файл:Philippine eagle 2.jpg
Philippine eagle
Pithecophaga jefferyi Philippines Critically endangered Файл:Gaukler-01.jpg
Bateleur[21]

Parrots

Example Binomial name Native range Current status Continental relative
Файл:Heracles inexpectatus.jpg
Hercules parrot
Heracles inexpectatus New Zealand Extinct (Miocene) Файл:Horned Parakeet 3487 Copyright TP ONG.JPG
Other parrots
Файл:Strigops habroptilus 1.jpg
Kakapo
Strigops habroptilus New Zealand Critically Endangered
Файл:Lophopsittacus.jpg
Broad-billed parrot
Lophopsittacus mauritianus Mauritius Extinct (c. AD 1680) Файл:Rose-ringed Parakeet (Psittacula krameri)- Female on a Neem (Azadirachta indica) tree at Hodal Iws IMG 1279.jpg
Psittaculine parrots

Owls

Example Binomial name Native range Current status Continental relative
Файл:Candiacervus ropalophorus.jpg
Cretan owl
Athene cretensis Crete Extinct (Pleistocene) Файл:Athene noctua (portrait).jpg
Little owl
Файл:Ornimegalonyx oteroi.jpg
Cuban giant owls
Ornimegalonyx spp. Cuba Extinct (Pleistocene) Файл:Strix-varia-005.jpg
Wood owls
Файл:Tyto gigantea.JPG
Greater Gargano giant owl
Tyto gigantea Gargano Island Extinct (Late Miocene) Файл:Barn Owl, Canada.jpg
Barn owls
Файл:Tyto pollens hccm.jpeg
Andros Island barn owl
Tyto pollens Andros Island, Bahamas Extinct (before AD 1600)
Файл:Tyto riveroi.jpg
Rivero's barn owl
Tyto riveroi Cuba Extinct
Файл:Tyto robusta.JPG
Lesser Gargano giant owl
Tyto robusta Gargano Island Extinct (Early Pliocene)

Caprimulgiformes

Example Binomial name Native range Current status Continental relative
New Zealand owlet-nightjar Aegotheles novazelandiae New Zealand Extinct (c. AD 1200) Файл:Aegotheles cristatus -South Australia, Australia-8.jpg
Australian owlet-nightjar
Файл:Aegothelessavesi.jpg
New Caledonian owlet-nightjar
Aegotheles savesi New Caledonia Critically endangered

Passeriforms

Example Binomial name Native range Current status Continental relative
Файл:NovitatesZoologicae18 Pl02 Corvus moriorum.png
Chatham raven
Corvus moriorum Chatham Islands Extinct New Zealand raven
Файл:Emberiza alcoveri.jpg
Long-legged bunting
Emberiza alcoveri Tenerife Extinct (after AD 1) Файл:Emberiza cabanisi cognominata, Menongue, Birding Weto, a.jpg
Cabanis's bunting
Giant nukupu'u Hemignathus vorpalis Hawaii Extinct (after AD 1000) Файл:Red-mantled Rosefinch - Almaty - Kazakistan S4E4053 (23051167291).jpg
Finches
Tasmanian superb fairywren Malurus cyaneus cyaneus Tasmania Least Concern Файл:Male and female superb fairy wren.jpg
Superb fairywren
Kangaroo Island superb fairywren Malurus cyaneus ashbyi Kangaroo Island Least Concern
Stout-legged wren Pachyplichas yaldwyni South Island of New Zealand Extinct Файл:Cobb's Wren.png
Other passeriforms
Файл:Ibis (1885) (14565465039).jpg
St Kilda wren
Troglodytes troglodytes hirtensis St Kilda, Scotland Unknown Файл:Ein neugieriger Zaunkönig.jpg
Eurasian wren
Файл:Silvereye, Capricorn.JPG
Capricorn silvereye
Zosterops lateralis chlorocephalus Capricorn and Bunker Group of the Australian Great Barrier Reef Unknown Файл:Silvereye Jan 2010.jpg
Silvereye

Reptiles

Pterosaurs

Example Binomial name Native range Current status Continental relative
Файл:Hatzegopteryx.png
Hatzegopteryx
H. thambema Hateg Island Extinct (Late Cretaceous) Файл:Life restoration of a group of giant azhdarchids, Quetzalcoatlus northropi, foraging on a Cretaceous fern prairie.png
Quetzalcoatlus

Iguanids

Example Binomial name Native range Current status Continental relative Insular / mainland
length or mass ratio
Файл:Brachylophus gibbonsi.JPG
Tongan giant iguana[22]
Brachylophus gibbonsi Tonga Extinct (c. 800 BC) Файл:Iguana iguana Portoviejo 01.jpg
South American
iguanas
Файл:Lapitiguana impensa.JPG
Fijian giant iguana [23]
Lapitiguana impensa Fiji Extinct (c. 1000 BC)
Файл:Sauromalus hispidus - Reptilium Landau.jpg
Angel Island chuckwalla
Sauromalus hispidus Isla Ángel de la Guarda, Baja California Near Threatened Peninsular chuckwalla MR ≈ 5 [24]
Файл:San Esteban Island Chuckwalla.jpg
San Esteban chuckwalla
Sauromalus varius San Esteban Island, Baja California Endangered MR ≈ 5 [24]

Geckos

Example Binomial name Native range Current status Continental relative Insular / mainland
length or mass ratio
Файл:Gecko de Delcourt Hoplodactylus delcourti GLAM MHNL 2016 3742.jpg
Delcourt's giant gekko
Gigarcanum delcourti New Caledonia Extinct (c. AD 1870) Файл:Oedura lesueurii 2.jpg
Diplodactylid geckos
LR ≈ 6.75 Шаблон:Efn
Файл:Rhacodactylus leachianus.jpg
New Caledonian giant gecko
Rhacodactylus leachianus New Caledonia Least Concern LR ≈ 4.4 Шаблон:Efn
MR ≈ 60 Шаблон:Efn

Rodrigues giant day gecko
Phelsuma gigas Rodrigues Extinct (c. AD 1850) Файл:Gold dust day gecko.JPG
Day geckos

Skinks

Example Binomial name Native range Current status Continental relative
Файл:Mabuja3.jpg
Vaillant's mabuya
Chioninia vaillanti Cape Verde Endangered Файл:Notomabuya frenata.jpg
Mainland mabuyine skinks
Файл:Macroscincus coctei003.jpg
Cape Verde giant skink
Macroscincus coctei Cape Verde Extinct (after AD 1900)

Mauritius giant skink
Leiolopisma mauritiana Mauritius Extinct (after AD 1600) Mainland eugongyline skinks
Terror skink Phoboscincus bocourti Île des Pins off New Caledonia Endangered Файл:Skink in Aussie.jpg
Mainland eugongyline skinks
Kishinoue's giant skink Plestiodon kishinouyei Miyako Islands and Yaeyama Islands, Japan Vulnerable Файл:Five-striped Blue-tailed Skink (Plestiodon elegans) 藍尾石龍子.jpg
Asian Plestiodon spp.

Wall lizards

Example Binomial name Native range Current status Continental relative
La Palma giant lizard Gallotia auaritae La Palma Critically endangered Файл:Psammodromus algirus - 01.jpg
Mediterranean sandrunner lizards
Файл:Gallotia bravoana.jpg
La Gomera giant lizard
Gallotia bravoana Gomera Critically endangered
Файл:Tenerife giant lizard restoration.jpg
Tenerife giant lizard[25]
Gallotia goliath Tenerife Extinct (c. AD 1500)
Файл:Gallotia Simonyi at Centro de recuperación del lagarto gigante..jpg
El Hierro giant lizard
Gallotia simonyi El Hierro Critically endangered
Файл:Gallotia stehlini -Gran Canaria, Canary Islands, Spain-8.jpg
Gran Canaria giant lizard
Gallotia stehlini Gran Canaria Least Concern

Snakes

Example Binomial name Native range Current status Continental relative
Angel de la Guarda Island speckled rattlesnake Crotalus mitchellii angelensis Isla Ángel de la Guarda off Baja California Least Concern Файл:Speckled Rattlesnake (Crotalus mitchellii) (21705787199).jpg
Speckled rattlesnake
Tadanae-jima striped snake population[26] Elaphe quadrivirgata Tadanae-jima island off Tokyo Unknown Файл:Elaphe quadrivirgata.JPG
Japanese striped snake
Файл:20060306 King Island Tiger Snake.jpg
Island tiger snake populations
Notechis scutatus Islands Mount Chappell (Tasmania); Williams, Hopkins, and the Nuyts Archipelago (all South Australia)[27] Least Concern[28] Файл:Tiger snake 2.jpg
Tiger snake
Isla Cerralvo long-nosed snake Rhinocheilus lecontei etheridgei Jacques Cousteau Island off Baja California Sur Unknown Файл:Rhinocheilus lecontei tessellatus.jpg
Long-nosed snake

Dubious examples

Файл:Komodo dragon Varanus komodoensis Ragunan Zoo 2b.jpg
Komodo dragon (Lesser Sundas)
Файл:Galapagos giant tortoise Geochelone elephantopus.jpg
Galápagos giant tortoise
  • The Komodo dragon of Flores and nearby islands, the largest extant lizard, and a similar (extinct) giant monitor lizard from Timor have been regarded as examples of giant insular carnivores. Since islands tend to offer limited food and territory, their mammalian carnivores (if present) are usually smaller than continental ones. These cases involve ectothermic carnivores on islands too small to support much mammalian competition. However, these lizards are not as large as their extinct Australian relative megalania, and it has been proposed based on fossil evidence that the ancestors of these varanids first evolved their large size in Australia and then dispersed to Indonesia.[29] If this is true, rather than being insular giants they would be viewed as examples of phyletic gigantism. Supporting this interpretation is evidence for a lizard in Pliocene India, Varanus sivalensis, comparable in size to V. komodoensis.[29] Nevertheless, given that Australia is often described as the world's largest island and that the related megalania, the largest terrestrial lizard known in the fossil record, was restricted to Australia, the perception of the largest Australasian/Indonesian lizards as insular giants may still have some validity.
  • Giant tortoises in the Galápagos Islands and the Seychelles, the largest extant tortoises, as well as extinct tortoises of the Mascarenes and Canary Islands, are often considered examples of island gigantism. However, during the Pleistocene, comparably sized or larger tortoises were present in Australia (Meiolania), southern Asia (Megalochelys), Europe[30] (Titanochelon), Madagascar (Aldabrachelys), North America[31] (Hesperotestudo) and South America[32] (Chelonoidis, the same genus now found in the Galápagos[33]), and on a number of other, more accessible islands of Oceania and the Caribbean.[31] In the late Pliocene they were also present in Africa ("Geochelone" laetoliensis[34]). The present situation of large tortoises being found only on remote islands appears to reflect that these islands were discovered by humans recently and have not been heavily populated, making their tortoises less subject to overexploitation.

Amphibians

Example Binomial name Native range Current status Continental relative Insular / mainland
length or mass ratio
São Tomé giant tree frog Hyperolius thomensis[35] São Tomé Island Endangered Файл:Hyperolius argus Al-ReedFrogs 01.jpg
African reed frogs
Palm forest tree frog Leptopelis palmatus[35] Príncipe Island Vulnerable Файл:Leptopelis rufus02.jpg
Red tree frog
LR ≈ 1.2 Шаблон:Efn
Giant Fiji ground frog Platymantis megabotoniviti[36] Viti Levu, Fiji Extinct Файл:Platymantis cagayanensis (KU 330716) from mid-elevation of Mt. Cagua - ZooKeys-266-001-g019.jpg
Asian platymantines
São Tomé giant grass frog Ptychadena newtoni[35] São Tomé Island Endangered Файл:Madagascar Grass Frog (Ptychadena madagascariensis), Andasibe, Madagascar (14156831413).jpg
Mascarene grass frog

Arthropods

Example Binomial name Native range Current status Continental relative
Файл:Birgus latro (Bora-Bora).jpg
Coconut crab
Birgus latro Indian Ocean islands
and Polynesia[37]
Vulnerable Файл:Purple hermit crab in can.jpg
Coenobita hermit crabs
Файл:Wetapunga.jpg
Giant weta
Deinacrida spp. New Zealand Variable Файл:ParktownPrawn.jpg
South African king crickets
Giant pseudoscorpion[38] Garypus titanius Boatswain Bird Island Critically Endangered Файл:Serianus bolivianus.jpg
Garypoids
Файл:Roachies.JPG
Hissing cockroaches
Gromphadorhini spp. Madagascar Unknown Файл:CockroachSwartbos.jpg
Blaberids
Файл:Labidura herculeana.jpg
Saint Helena earwig
Labidura herculeana Saint Helena Extinct (c. AD 1967) Файл:Labidura riparia.jpg
Shore earwig
Файл:Stavenn Megachile pluto.jpg
Wallace's giant bee
Megachile pluto North Moluccas Vulnerable Файл:Megachilidae. Chalicodoma sensu lato male. Likely subgenus Callomegachile. - Flickr - gailhampshire.jpg
Callomegachile
Файл:Megalara garuda male.png
Megalara
Megalara garuda Mekongga Mountains,
Sulawesi
Unknown Файл:Wasp August 2012-2.jpg
Crabronine wasps
Файл:Sphaeromimus andohahela.jpg
Madagascan
giant pill-millipedes
Microsphaerotherium spp.

Sphaeromimus spp.

Zoosphaerium spp.
Madagascar Unknown Файл:Giant pill millipede-2-bsi-yercaud-salem-India.JPG
Indian giant pill-millipedes
(Arthrosphaera)
Файл:Orsonwelles malus (Simon, 1900).jpg
Orsonwelles
Orsonwelles spp. Hawaii Unknown Файл:Labulla thoracica 02.JPG
Money spiders
Файл:Conants Giant.jpg
Conant's giant Nihoa tree cricket
Thaumatogryllus conanti Nihoa Unknown Файл:Neoxabea bipunctata - Two-spotted Tree Cricket (30874429898).jpg
Tree crickets
Файл:Taveuni longhorn beetle.jpg
Giant Fijian long-horned beetle[39]
Xixuthrus heros Viti Levu, Fiji Endangered Файл:Longhorn Beetle (Xixuthrus microcerus) (8756596643).jpg
Australasian Xixuthrus
Taveuni beetle Xixuthrus terribilis Taveuni, Fiji Unknown

Gastropods

Example Binomial name Native range Current status Continental relative
Файл:Powelliphanta annectens DOC 2007.jpg
Kauri land snails
Paryphanta spp.

Powelliphanta spp.
New Zealand Near Threatened Файл:Flat shelled snail Chatswood West.JPG
Other rhytidids

Flora

In addition to size increase, island plants may also exhibit "insular woodiness".[40] The most notable examples are the megaherbs of New Zealand's subantarctic islands.Шаблон:Citation needed Increased leaf and seed size was also reported in some island species regardless of growth form (herbaceous, bush, or tree).[41]

Example Binomial name Native range Current status Continental relative
Файл:Anisotome latifolia.jpg
Campbell Island carrot
Anisotome latifolia Campbell and Auckland Islands Unknown Файл:Angelica archangelica (1118596627).jpg
Apiaceae
Файл:Bulbinella rossi and Australasian pipit.jpg
Ross lily
Bulbinella rossii Campbell and Auckland Islands Naturally Uncommon Файл:Bulbinella hookeri kz01.jpg
New Zealand Maori lily
Файл:Corokia macrocarpa kz04.jpg
Chatham Islands korokio[41][42]
Corokia macrocarpa Chatham Islands Unknown Файл:Corokia cotoneaster growing beside the track into Te Toto Gorge, Raglan, New Zealand.jpg
New Zealand korokio[43]
Файл:Flora Antarctica Plate XXVI.XXVII.jpg
Black-eyed daisy
Damnamenia vernicosa Auckland and Campbell Islands Naturally Uncommon Файл:Erigeron Glaucus.jpg
Astereae
Файл:Cucumber tree (6407165121).jpg
Cucumber tree[44]
Dendrosicyos socotranus Socotra Vulnerable Файл:Cucumis sativus 0001.JPG
Gourds
Файл:Lodoicea Maldivica B.jpg
Coco de mer[45][44]
Lodoicea maldivica Seychelles Endangered Файл:Atakora-Borassus aethiopum (4).jpg
Borassoid palms
Файл:Flora Antarctica Plate XXIV.XXV.jpg Pleurophyllum criniferum Antipodes, Auckland and Campbell Islands Unknown Файл:Cineraria geifolia 28092003 Afrique du sud.jpg
Cineraria
Файл:Pleurophyllum hookeri.jpg
Silver-leaf daisy
Pleurophyllum hookeri Macquarie Island, Auckland and Campbell Islands Unknown
Файл:Pleurophyllum speciosum (1).jpg
Campbell Island daisy
Pleurophyllum speciosum Campbell and Auckland Islands Naturally Uncommon
Файл:Stilbocarpa polaris.jpg
Macquarie Island cabbage
Stilbocarpa polaris Macquarie Island and New Zealand subantarctic islands Vulnerable Файл:Aralia spinosa, Georgia, USA.jpg
Araliaceae

See also

Notes

Шаблон:Notelist

References

Шаблон:Reflist

External links

Шаблон:Biological rules

  1. Шаблон:Cite journal
  2. Шаблон:Cite journal
  3. Шаблон:Cite journal
  4. 4,0 4,1 Шаблон:Cite journal
  5. Шаблон:Cite journal
  6. Шаблон:Cite journal
  7. Шаблон:Cite journal
  8. Шаблон:Cite journal
  9. Шаблон:Cite journal
  10. Freudenthal, M. (1985). Cricetidae (Rodentia) from the Neogene of Gargano (Prov. of Foggia, Italy). Rijksmuseum van Geologie en Mineralogie.
  11. Шаблон:Cite web
  12. Шаблон:Cite web
  13. Шаблон:Cite journal
  14. http://www.raco.cat/index.php/Orsis/article/viewFile/24434/24268 Шаблон:Bare URL PDF
  15. Шаблон:Cite journal
  16. 16,0 16,1 Шаблон:Cite journal
  17. Шаблон:Cite web
  18. Шаблон:Cite journal
  19. Шаблон:Cite web
  20. Шаблон:Cite web
  21. Шаблон:Cite journal
  22. Шаблон:Cite journal
  23. Шаблон:Cite journal
  24. 24,0 24,1 Шаблон:Cite journal
  25. Шаблон:Cite journal
  26. https://www.jstage.jst.go.jp/article/hsj2000/21/1/21_1_43/_pdf Шаблон:Bare URL PDF
  27. Шаблон:Cite journal
  28. Шаблон:Cite iucn
  29. 29,0 29,1 Шаблон:Cite journal
  30. Pérez-García, A., Vlachos, E., & Arribas, A. (2017). The last giant continental tortoise of Europe: A survivor in the Spanish Pleistocene site of Fonelas P-1. Palaeogeography, Palaeoclimatology, Palaeoecology, 470, 30–39.
  31. 31,0 31,1 Шаблон:Cite journal
  32. Шаблон:Cite journal
  33. Fariña, R.A., Vizcaíno, S.F. & De Iuliis, G. (2013) Megafauna: Giant Beasts of South America. Indiana University Press, 448 pages.
  34. Шаблон:Cite book
  35. 35,0 35,1 35,2 Шаблон:Cite journal
  36. Шаблон:Cite journal
  37. Neither coconut crabs nor their relatives can swim beyond the larva stage, making the adults land animals in practice. Coconut crabs can weigh over 4 kg (9 pounds); the largest hermit crabs of the related genus Coenobita, C. brevimanus of coastal Africa and Asia, only reaches 230 grams (0.5 pounds).
  38. Шаблон:Cite web
  39. Шаблон:Cite journal
  40. Шаблон:Cite journal
  41. 41,0 41,1 Шаблон:Cite web
  42. Шаблон:Cite web
  43. Шаблон:Cite web
  44. 44,0 44,1 Шаблон:Cite book
  45. Шаблон:Cite book