Biotopes de l’Australasie
Cette playlist YouTube vous emmène dans les biotopes d’eau douce d’Australie, de Mélanésie, de Micronésie, de Nouvelle-Zélande, de Papouasie-Nouvelle-Guinée, de Polynésie et de Papouasie occidentale. Cette sélection d’images de la nature soigneusement choisie capture les rivières, les ruisseaux, les lacs et les marécages de cette vaste région dans leur forme pure. Vous voyez comment la vie se déroule sous la surface de l’eau : les poissons qui se cachent parmi les racines et les rochers, les bancs qui traversent les cours d’eau limpides et les jeux d’ombre et de lumière dans les eaux tropicales.
Les vidéos offrent un aperçu unique d’écosystèmes souvent difficiles d’accès, mais qui abritent une biodiversité d’une richesse sans précédent. Des rivières de la forêt tropicale de Papouasie-Nouvelle-Guinée aux ruisseaux de montagne de Nouvelle-Zélande, chaque clip montre comment le paysage, la qualité de l’eau, la flore et la faune locales sont parfaitement adaptés. Ces images ne sont pas seulement belles à regarder, elles contribuent également à une meilleure compréhension de l’importance de ces habitats fragiles.
Cette playlist est destinée aux amoureux de la nature, aux biologistes, aux aquariophiles et à tous ceux qui souhaitent en savoir plus sur les biotopes d’eau douce en Océanie. En montrant des images réelles de la nature – sans interventions ou environnements artificiels – les vidéos offrent une expérience authentique et éducative. Elles nous rappellent à quel point ces habitats sont précieux et uniques, et pourquoi il est essentiel de les protéger.
Dans la barre de recherche ci-dessous, vous pouvez rechercher uniquement cette liste de lecture :
Brown Tree Frog (Litoria ewingii) tadpoles
Also known as the Southern Brown Tree Frog, this is a widespread and common species found across a wide variety of habitats in south-eastern Australia. It is also commonly found ...in suburban areas.
Although the peak breeding times are in spring and autumn, males can be heard calling at any time of the year.
The tadpoles in this video where filmed in a roadside pool near Scottsdale in north-eastern Tasmania.
© Greg Wallis
http://www.gregwallis.comShow More
Brown Tree Frog (Litoria ewingii) tadpoles
Also known as the Southern Brown Tree Frog, this is a widespread and ...
Also known as the Southern Brown Tree Frog, this is a widespread and common species found across a wide variety of habitats in south-eastern Australia. It is also commonly found ...in suburban areas.
Although the peak breeding times are in spring and autumn, males can be heard calling at any time of the year.
The tadpoles in this video where filmed in a roadside pool near Scottsdale in north-eastern Tasmania.
© Greg Wallis
http://www.gregwallis.comShow More
Native Fish: Barred Galaxias (Galaxias fuscus) in the Goulburn River catchment
The beautiful Barred Galaxias (Galaxias fuscus) is a critically ...
The beautiful Barred Galaxias (Galaxias fuscus) is a critically endangered small native freshwater fish found in the headwaters of the Goulburn River in Victoria. Due largely to it's very ...restricted distribution and the adverse impacts of introduced predatory trout, the few remaining populations of Barred Galaxias are heavily fragmented and isolated from one another. This means that single populations are particularly vulnerable to threats from wildfires, siltation and logging, with no way of that population being re-established should it go locally extinct.
Barred Galaxias are listed as a Threatened species by the Victorian Government and as a Critically Endangered species by the IUCN. As such they are afforded full protection and cannot be taken from the wild or kept in captivity (Flora and Fauna Guarantee Act 1988). Their survival into the future depends upon the protection of the towering forest giants that surround the clear cool streams of the mountains, and on ongoing measures to stop the upstream spread of introduced trout.
Recently I had the chance to explore some of the remaining beautiful tall Mountain Ash (Eucalyptus regnans) forests which hopefully soon will form part of the proposed Great Forest National Park. I came across a small creek and after spotting a fish decided to use my gopros to try and record some footage. Although the cameras were only in the creek for around 45 minutes or so, I was thrilled to download the footage at home and see the remarkable amount of fish activity caught on camera. Using a remote camera is a bit hit and miss as often you only get a fish swim past occasionally and sometimes not at all, but any activity you get tends to be much more natural than the flurry of activity you get when a bait is used. No baits were used in this video but otherwise the technique is similar to a BRUV.
This video represents an edited version of some of the highlights that were caught on camera.
You can see an unedited single 20 minute video clip here, but grab a coffee first!
http://www.youtube.com/edit?o=U&video_id=ZndDmqmwuJI
Best watched in HD in full screen mode.
#valleyofthegiants
For more information on Barred Galaxias see the Fishes of Australia website:
http://www.fishesofaustralia.net.au/home/species/1668
CAAB Taxon Code: 37102023
For information, tips and tricks for using gopros in shallow water see my kneedeepvideo blog below:
http://kneedeepvideo.blogspot.hk/2015/12/welcome-to-knee-deep-shallow-water.html
Please throw your support behind the establishment of the Great Forest National Park and put an end to old growth logging
http://www.greatforestnationalpark.com.auShow More
Native Fish: Western Rainbowfish (Melanotaenia australis), Finniss River, NT.
Western Rainbowfish (Melanotaenia australis) are native to the ...
Western Rainbowfish (Melanotaenia australis) courtship behaviour in the wild
Western Rainbowfish (Melanotaenia australis) are native to the ...
Western Rainbowfish (Melanotaenia australis) are native to the freshwaters in the north of Western Australia and the western part of the Top End. These fish were filmed in the upper ...reaches of the Finniss River near Batchelor in the Top End of the Northern Territory.
As an aside, at 01:10 in near the left top corner you can see a small shrimp swimming to join another shrimp already resting on a partially submerged leaf. The weight of the extra shrimp sinks the leaf, until a few seconds later when the shrimp hops off and the leaf rises again.
For more information on Western Rainbowfish see:
Fishes of Australia website:
http://www.fishesofaustralia.net.au/home/species/3047
Rainbowfish at ANGFA Queensland:
http://rainbowfish.angfaqld.org.au/Australis.htm
CAAB Taxon Code: 37245012
http://www.gregwallis.comShow More
Sydney Crayfish (Euastacus australasiensis)
The Sydney Crayfish (Euastacus australasiensis) is one of two species ...
The Sydney Crayfish (Euastacus australasiensis) is one of two species of freshwater spiny crayfish found in the Sydney region. Although they are often referred to as Yabbies, they are distinctively ...different from the true Yabbie (Cherax destructor). Along the bottom edge of the claws in all Euastacus or spiny crayfish there are spines present, whereas in other types of freshwater crayfish this edge is completely smooth; it's an easy way of distinguishing them yabbies.
There are more than 50 different species of Euastacus crayfish endemic to the east coast of Australia. The Sydney Crayfish has a limited distribution in natural areas close to Sydney including the Blue Mountains.
The Sydney Crayfish is often found in smaller and more open creeks than it's much larger relative the Giant Sydney Crayfish (Euastacus spinifer). Sometimes they do occur together as was the case in the video above; however here, being much smaller, this crayfish was keeping well out of the way by remaining very close to it's crevice/burrow on the edge of the pool that was being patrolled by it's much larger cousins.
CAAB Taxon Code: 28 795010
This video was filmed in Ku-ring-gai Chase National Park, Sydney, NSW, Australia, in April 2016.
© Greg Wallis 2016
http://www.gregwallis.comShow More
Native fish: Pacific Blue Eye (Pseudomugil signifer), Sydney
The Pacific Blue-eye is a beautiful small native fish found in ...
The Pacific Blue-eye is a beautiful small native fish found in freshwater and estuarine areas along the eastern coast of Australia. Although it has been recorded growing to 7cm, it ...is much more commonly seen at around 3-4cm in length. Its colourful form, long delicate fins, courtship displays and active nature make it a popular aquarium fish for native fish enthusiasts.
This video was filmed in the lower reach of a creek just above the tidal influence, in Ku-ring-gai Chase National Park on the northern outskirts of Sydney. As well as the fish, it gives an idea of the habitat and biotope in this part of the creek. Pacific Blue-eye were also observed immediately downstream in the tidal areas along with a range of other species.
For more information on Pacific Blue Eye see:
The Fishes of Australia website
http://fishesofaustralia.net.au/home/...
The Australian Museum website
https://australianmuseum.net.au/pacif...
The ANGFA Queensland website
http://rainbowfish.angfaqld.org.au/Si...
CAAB Taxon Code:37245020
Video and sound © Greg Wallis 2017
For stock footage enquiries contact greg(underscore)wallis(at)iinet(dot)net(dot)auShow More
Rainbow Trout, Brown Trout and Platypus in north-east Tasmania
Salmonids (Salmonidae) were introduced to the waterways of ...
Salmonids (Salmonidae) were introduced to the waterways of south-eastern Australia in the 1800's; none are native to this country despite what many people believe. These large predatory fish have an ...appetite for insects, crustaceans and small fish and have had a devastating impact on some of our small native fishes, particularly the galaxiids. Undoubtedly some species have become extinct; others have had their ranges severely reduced and fragmented and now only occur where trout are not present. Despite the known threats they pose to native fishes, trout continue to be stocked into waterways by government fisheries to provide sport for recreational fishing.
I visited this creek in north-eastern Tasmania in the hope of filming some Giant Tasmanian Freshwater Crayfish (Tasmanian Lobsters) and some native fish but unfortunately none were caught on my cameras in the couple of hours I spent there. Apart from a lone Short-finned Eel, not a single native fish was seen, only Rainbow Trout and Brown Trout. I did however get a pleasant surprise when I got home to download my footage and discovered that an underwater Platypus had passed in front of the camera several times; I wasn't expecting this as I was filming in the middle of the day.
For more information on the impacts of salmonid fishes on native fish see the following paper:
https://www.environment.gov.au/system/files/resources/c7e5e90a-1e4b-4040-abba-38939d32ebbf/files/salmonids.pdf
© Greg Wallis 2016Show More
Native Fish: Pacific Blue Eye (Pseudomugil signifer)
The Pacific Blue-eye is a beautiful small native fish found in ...
The Pacific Blue-eye is a beautiful small native fish found in freshwater and estuarine areas along the eastern coast of Australia. Although it has been recorded growing to 7cm, it ...is much more commonly seen at around 3-4cm in length. Its colourful form, long delicate fins, courtship displays and active nature make it a popular aquarium fish for native fish enthusiasts.
This video was filmed in the lower reach of a creek just above the tidal influence, in Ku-ring-gai Chase National Park on the northern outskirts of Sydney. As well as the fish, it gives an idea of the habitat and biotope in this part of the creek. Pacific Blue-eye were also observed immediately downstream in the tidal areas along with a range of other species.
For more information on Pacific Blue Eye see:
The Fishes of Australia website
http://fishesofaustralia.net.au/home/species/4096
The Australian Museum website
https://australianmuseum.net.au/pacific-blue-eye-pseudomugil-signifer
The ANGFA Queensland website
http://rainbowfish.angfaqld.org.au/Signifer.htm
CAAB Taxon Code:37245020
Video and sound © Greg Wallis 2017
For stock footage enquiries contact greg(underscore)wallis(at)iinet(dot)net(dot)auShow More
Утконос: яйца, яд и молоко // Всё как у зверей #69
Автор и ведущая - Евгения Тимонова, режиссер - Сергей Фененко, ...
Underwater in the Deua River: freshwater fish
I was fortunate enough to be able to stop at the beautiful Deua River ...
I was fortunate enough to be able to stop at the beautiful Deua River for an hour or so on my way through from Braidwood to Moruya down the Araluen ...Road. During that time I observed 4 different fish species, 3 of which can be seen in this video; Australian smelt,(Retropinna semoni), Cox's gudgeon (Gobiomorphus coxii) and Common galaxias (Galaxias maculatus). I also observed a Long-finned Eel. Many other species are known to occur in the catchment including the endangered Australian Grayling (Prototroctes maraena).
The Deua River catchment includes the eastern side of the Great Dividing Range south of Braidwood, and flows through to the coast near Moruya. It supplies a substantial amount of water for the Shire of Eurobodalla. Araluen Creek is a tributary of the river and has been subjected to extensive gold mining in the past resulting in substantial sedimentation much further downstream. A new gold mine proposed for Majors Creek in the Deua headwaters has already attracted considerable controversy over breaches of environmental regulations and a proposal to use cyanide in the gold extraction process.
For more information on gold mining in the catchment of the Deua River see the Majors Creek website:
http://www.majorscreek.org.au/content/dargues-gold-mine-information
For more information on the fish in the video see the Fishes of Australia website for each species:
Cox's Gudgeon (Gobiomorphus coxii) CAAB: 37429021
http://fishesofaustralia.net.au/home/species/4143
Australian Smelt (Retropinna semoni) CAAB: 37101001
http://fishesofaustralia.net.au/home/species/2087
Common Galaxias (Galaxias maculatus) CAAB: 37102006
http://fishesofaustralia.net.au/home/species/2129
© Greg Wallis 2017Show More
Native fish: Common Galaxias and Pygmy Perch; Darlot Creek
Darlot Creek starts above Lake Condah near Mount Eccles in ...
Darlot Creek starts above Lake Condah near Mount Eccles in south-western Victoria. It flows for around 50kms before jong the Fitzroy River near the coast just south-east of Tyrendarra.
Three ...species of fish can be seen in this video: Common Galaxias (Galaxias maculatus), Southern Pygmy Perch (Nannoperca australis) and the introduced pest fish Gambusia holbrooki. Several other species of native and inroduced fish are known to occur in the catchment.
Many of the fins on the Pygmy Perch have been damaged; presumably this is from fin-nipping by the Gambusia. A Gambusia can be seen fin-nipping towards the end of the video at 1:13
Darlot Creek is in Gunditjmara country and is testament to a rich history of prehistoric engineering that involved constructing stone walls and channels to trap, grow and harvest Short-fin Eels and other fish. Countless thousands of eels migrated up these waterways every year
As lava from the Mt Eccles eruption cooled, it formed a landscape of rough stony rises. Some of these partially dammed the flow of Darlot Creek and led to the formation of Lake Condah. Thousands of years ago the Gunditjmara engineered an ingenious system of using stones from the lava field to form a system of weirs that trapped eels and other fish, providing them with a year-round supply of fresh food, even in drought. The eels were smoked in hollow trees.
@ Greg Wallis 2017Show More
Чак Норрис среди крокодилов // ВКУЗ #66
Мы приехали в город имени премии Дарвина, чтобы снять самое опасное ...
Мы приехали в город имени премии Дарвина, чтобы снять самое опасное для человека животное - морского крокодила. Само собой, рискуя собственной жизнью и жизнью своих детей. Но оно того ...стоило.
В этом видео: морские крокодилы Австралии, Стив Ирвин, крокодилы-людоеды, узкорылые крокодилы, премия Дарвина, северная Австралия.
Спасибо великому крокодиловеду Владимиру Динецу за консультации и замечательную книгу "Песни драконов": https://www.corpus.ru/products/vladimir-dinets-pesni-drakonov.htm Прочитайте обязательно, уйма радости и никакого риска.
Ну и видео маленького натуралиста о больших крокодилах тоже смотрите: https://youtu.be/qk7_Rb1lmhY И не жалейте лайков - Эмиль очень старался, чтобы не только выжить, но и рассказать вам об этом.
Автор и ведущая - Евгения Тимонова, съемки в Австралии - Олег Кугаев, Сергей Фененко, комикс - Андрей Кузнецов (Акуаку), монтаж - Сергей Фененко.
#крокодилы #Австралия #самыеопасныеShow More
Depuis que j’ai acheté mon premier aquarium d’occasion à l’âge de douze ans, j’ai toujours eu un ou plusieurs aquariums. J’ai même transformé un garage en salle d’élevage où j’avais 50 aquariums contenant environ 10 000 litres d’eau. Actuellement, j’ai deux aquariums : un aquarium Tanganyika de 1 250 litres et un aquarium communautaire de 250 litres avec des plantes. Depuis 10 ans, je travaille sur ce site web en tant que rédacteur et photographe.
