Baby shark born


This is video from the aquarium of Ecomare museum on Texel island in the Netherlands.

It shows eggs of a small-spotted catshark. Sometimes, the shark embryos inside the eggs move.

Baby small-spotted catshark

Last weekend, one baby shark (see the photo) hatched. The aquarium expects that others will follow soon.

Freezing bat flying freely again


This video is about a colony of common pipistrelle bats in the Netherlands, with bat detector sound.

Translated from Ecomare museum on Texel island in the Netherlands:

Common pipistrelle freed – 19-04-13

That bat was a miserable creature when it was brought to Ecomare in February. The pipistrelle had woken up from its hibernation, but it was much too cold and it was yet unable to find any food. Ecomare employee Pierre Bonnet has all along taken care of this bat. That is not easy, because bats have to eat very often, including at night. Fortunately, the bat is in a good condition again, so well, that during the warm weather of recent days it could be released.

Farewell

The sisters Nienke, Lotte and Linde had found the bat with their father in his workshop. Now that the bat would be freed, they were invited. Just before leaving the bat got one last meal, and the girls could still see the bat one final time. Then they along with Pierre and his daughter Jonne, released it, near Den Burg town.

Jonne feeds the bat for the last time, while a finder and a friend watch, photo by Pierre Bonnet

What a beached whale ate, new research


This video is called Northern Bottlenose Whale Species Identification.

In 1956, a female northern bottlenose whale beached near Oudeschild village on Texel island in the Netherlands.

Recently, the contents of its intestines were investigated at Ecomare museum on Texel.

Arthur Oosterbaan of the museum investigated squid bills.

This is called A close-up video of Boreo Atlantic Armhook Squid, Gonatus fabricii in the deep waters of the Canada Basin.

Most were bills of the Boreo Atlantic armhook squid (Gonatus fabricii).

The others were Gonatus steenstrupi, a bit more southern species.

Singing young grey seal Justin, videos


Usually, seals make hardly any sounds. However, young grey seal Justin, in the seal rehab of Ecomare museum on Texel island in the Netherlands, sings, as this video shows.

The seal was found while sick by musician Justin Segerink, and named Justin after the finder.

In this video, Justin musician tries to get Justin seal to sing along to a song on guitar, but does not succeed.

Basically, only young seals make sound. And Justin is growing up; singing less and less. His health is improving so well, that next week, he will be freed into the sea.

Young minke whale killed by plastic


The dead young minke whale in Belgium, photo © MUMM/BMM/UGMM

Translated from Ecomare museum, on Texel island in the Netherlands; about Belgium:

Whale killed by plastic – 03.13.13

A young Minke whale washed ashore last weekend on the beach of Nieuwpoort. It was a male, 3.5 meter long and 400 kilogram, so a small one. The whale was still so fresh that researchers believe that the young animal died on the beach. The researchers also discovered why the whale got into trouble ….. there was 400 grams of plastic bags in its stomach.

Constipated

The minke whale was brought for examination to the University of Liège, where veterinarian Thierry Jauniaux went in search of the cause of death. The plastic bags soon gave him a clue. The plastic caused an almost complete obstruction of the digestive tract, causing the animal to be no longer able to feed; finally, starvation killed it. The stranded minke whale was remarkably thin.

Freshwater fish of Wadden Sea islands


This video is called トゲウオの巣卵ファンニング行動 Freshwater fish Ninespine stickleback fanning his nest.

Translated from ichthyologist Gerbrand Gaaff in the Netherlands:

Schiermonnikoog and Vlieland have a freshwater fish fauna with very few species. Actually only the ninespine stickleback plays a significant role there. In addition, on both islands also Prussian carp (a carp relative) are sometimes caught. The sweet waters of the other three islands are also inhabited by perch, roach, bream, silver bream, common rudd, carp and pike. The zander lives only on Texel and the tench only on Terschelling.

See also the table here.

This site says that the goldfish (domesticated form of the Prussian carp), probably released from aquariums, is the only freshwater fish of Vlieland.

Dutch fish ladder for sticklebacks


This video from Finland says about itself:

Three-spined stickleback and fry (Gasterosteus aculeatus)

July 19, 2010

The male stickleback guards something. I think there was a nest somewhere. Though he may protect his fry. Video was written at the Gulf of Finland in July.

Translated from Dutch wildlife ranger ; his blog post on fish ladders. In the original, there is not just this photo, but a slide show:

Texel stickleback fish ladder

Fish ladders for sticklebacks

Posted on February 12, 2013

For salmon and trout they existed already, fish ladders to pass dams. Threespine sticklebacks need ladders with much smaller steps. Almost 20 years ago, Forestry Texel thought about this. Through these fishways threespine sticklebacks can swim from the Wadden Sea into the Moksloot to lay their eggs in the fresh water of the Dunes of Texel. A marine threespine stickleback is twice as long and five times as heavy as a stickleback which has always lived in fresh water. Large fish lay more eggs, and are also better food for birds like spoonbills.

See also here.

New wasp species discovery on Texel island


The wasp species, recently discovered on Texel

Translated from the blog of Erik van der Spek, game warden on Texel island, the Netherlands:

January 22, 2013 by Erik van der Spek, Forestry Department, Texel

Last August, Theo Peeters found a female of the spider hunting wasp Aporinellus sexmaculatus at the Hors area. For the Wadden Sea islands so far, an unknown species.

Females of this species are 5-9 mm long. In the Netherlands, the Aelurillus v-insignitus jumping spider is known to be a prey of Aporinellus sexmaculatus. Spider hunting wasps catch spiders as food for their larvae. The crippled prey is dragged into a 30 cm long corridor, dug 1.5 cm below the surface. Inside the prey an egg is deposited. Besides jumping spiders, possibly crab spiders and lynx spiders may be larval food as well. Aporinellus sexmaculatus is mainly known from the Dutch mainland dunes, but also from the dunes of Schouwen island in Zeeland. A different habitat for them is the area near Maastricht.

See also here.

Sunfish beaches on Dutch island


Sunfish on Ameland beach, photo © Petra de Jong

Translated from Ecomare museum on Texel island in the Netherlands:

Sunfish on Ameland beach – 01/03/13

A huge ocean sunfish 1.55 meters long and 1.22 meters high! Hikers found the big fish last Tuesday on the beach of Ameland. It is a remarkable find. It does not happen every year that ocean sunfish are seen along our coast, yet this is the fourth individual in a few weeks’ time. In addition, this one was pretty big. Usually people see smaller specimens. The largest one ever in the Netherlands beached also on Ameland. That was in 1889. That animal was 2.73 meters long.

Several finds

On Texel in December two dead sunfish were found on one day, one on the North Sea beach, the other one along the Wadden Sea. They were two relatively small fish of 60 and 80 centimeter. A few days later a third sunfish washed up on the beach of Domburg in Zeeland. This one was 1.13 meters long.

Yesterday, a squid beached on Ameland as well; photo here.