#Chiloscyllium plagiosum

[fishenjoyer1]

Fish of the Day

Today's fish of the day is the whitespotted bamboo shark!

The whitespotted bamboo shark, known by scientific name Chiloscyllium plagiosum is an average carpet shark. With a range across the Indo-Pacific ocean, from Japan to India living in and around coral reefs, close to the shore. They can stretch as far as the coast of madagascar, but most populations are focused around Southeastern Asia at depths from 0-50 meters deep. The coloration of the whitespotted bamboo shark is unique among carpet sharks, and other sharks in the area making it easy to identify when found. Like other carpet sharks, this shark contains 5 gills, and 2 distinct dorsal fins, allowing a wider range of movement.

The diet of the whitespotted bamboo shark consists of small fish and nearby invertebrates, they have only about 30 teeth of the upper and lower sections of their jaw, but the teeth are small and skilled at grasping and crushing. Softer prey is grabbed by the teeth, biting in to prevent escape, however harder prey, such as crabs or other crustaceans, are grabbed with a different method. To prevent damage to teeth tips, the shark can pivot their teeth backwards, and grab hard shelled prey with this flattened surface, crushing down on them. This diet can support them getting as a large as a meter, with the largest recorded getting up to 37 inches.

Like many other carpet sharks, the whitespotted bamboo shark is egg laying. A single laying will contain anywhere between 2-6 eggs, which will then spend between 14-15 weeks hidden on the sea bed before hatching. However in an aquarium in Detroit in 2002 had a female whitespotted bamboo shark that had eggs despite not being anywhere near a male within 6 years. These eggs went on to hatch and produce healthy offspring. Although, we are currently unsure, the more popular theories being that: this species of shark contains both female and male genitalia, this shark can store sperm for longer than initially thought, or that this species may be able to complete a process called parthenogenesis, which is a kind of asexual reproduction.

Have a wonderful Wednesday, everyone!

[puppetboysx3]

Bamboo sharks

The whitespotted bamboo shark (Chiloscyllium plagiosum) is a species of carpet shark

The whitespotted bambooshark is used for human consumption and in traditional Chinese medicine along with being common at aquariums since they are generally easy to care for and safe to touch (being harmless to humans)

The whitespotted bamboo shark is found in the Indo-west Pacific region including waters off Madagascar, India, Sri Lanka, Singapore, Thailand, Indonesia, Viet Nam, China, Taiwan, Japan, and the Philippines.

These sharks feed at night , they are nocturnal :3

bamboo sharks are important for maintaining the health of aquatic ecosystems

The shark prefers inshore waters. It is usually seen on the bottom, or on the reefs in the tropics.

When the shark hatches, it is about 3.54 to 4.72 inches [9 to12 cm] in length. Females mature when they are 1.6 to 2 ft [50 to 60 cm], and the shark can reach a length of 3.1 ft [95 cm].

[shark-of-tha-day]

Bamboo shark plss

shark of the day: whitespotted bamboo shark, chiloscyllium plagiosum

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the whitespotted bamboo shark, also called the whitespotted catshark, is a small species of carpet shark noted for the white spots on its body. they grow to be around 1 metre(~ 3 ft) in length. bamboo sharks are typically found in shallow coastal waters in and around reefs in the west-indo pacific. they feed on small fish, crustaceans and invertibrates.

[sharkest-sharks]

Whale shark (Rhincodon typus) | Whitespotted bamboo shark (Chiloscyllium plagiosum)

Sharkest shark polls

[champ-wiggle]

Sharks in an Italian aquarium keep having 'virgin birth' after years without males

By Reham Atya, published August 6, 2024

Two endangered female sharks found to be reproducing asexually in the absence of males in what appears to be a vital survival mechanism amid declining male populations.

The pups born at the Cala Gonone Aquarium in Italy represent the first documented case of facultative parthenogenesis in the common smooth hound shark (Mustelus mustelus). (Image credit: Esposito et al/Scientific Reports 2024)

Captive female sharks at an aquarium in Italy keep reproducing on their own with no males involved, indicating that it could be a vital survival mechanism, according to a new study.

In the study published July 26 in the journal Scientific Reports, the scientists documented repeated asexual reproduction in two common smooth hound sharks (Mustelus mustelus), which are classified as an endangered species by the International Union for Conservation of Nature. The sharks are usually found in the Mediterranean Sea and other warm waters but are threatened by illegal fishing.

The two female sharks are in captivity at Cala Gonone Aquarium in Italy and have spent the last 14 years away from males. Since 2020, both females have reproduced asexually, which indicates facultative parthenogenesis.

Parthenogenesis means "virgin birth," in Greek and describes when an egg develops into an offspring without fertilization. While uncommon in vertebrates, this phenomenon has been observed in reptiles such as crocodiles and water snakes, amphibians and some fish.

Two smoothhound sharks (Mustelus mustelus) in an Italian aquarium have had 'virgin births' since 2020. (Image credit: Shutterstock)

However, this is the first documented case of facultative parthenogenesis — the ability to reproduce both sexually and asexually — in this shark species. The researchers found that the two females could reproduce parthenogenetically roughly once a year. That rules out the possibility of sexual reproduction because of stored sperm, according to the researchers.

"Remarkably, this finding reveals that parthenogenesis can occur annually in these sharks, alternating between two females, and conclusively excludes long-term sperm storage as a cause," the authors wrote in the study.

In total, the pair has produced four offspring. The first pup was born in 2016, but it died and the remains were not studied. Three more pups have been born since — one in 2020, another in 2021 and a third in 2023. Only one (born in 2021) is still alive. All displayed bite marks on their bodies, which was likely the cause of death for the pups born in 2020 and 2023, according to the researchers.

To confirm the genetic origins of the offspring, the researchers took DNA samples from each of the three pups and compared them to the adult sharks. Their findings showed that in the set of markers tested, the offspring had identical genes to their mothers.

A smooth-hound shark in an aquarium in France. (Image credit: AFP / Stringer/iStock)

This discovery highlights the importance of parthenogenesis as a survival mechanism in wild populations with declining male numbers, the researchers said.

"These findings greatly enhance our understanding of reproductive strategies in sharks and could inform conservation efforts for endangered species," the authors said in the study.

While the study focused on common smooth-hound sharks, parthenogenesis has been reported in other species, including whitespotted bamboo sharks (Chiloscyllium plagiosum), zebra sharks (Stegostoma tigrinum), and swell sharks (C. ventriosum).

[unofficial-sean]

Chiloscyllium plagiosum, the whitespotted bamboo shark.

[amaze-animalia]

Bamboo Sharks

Whitespotted Bamboo Shark - Chiloscyllium plagiosum

The Whitespotted Bamboo Shark is a small shark with a brown body with dark-brown bands and both white and dark spots. It’s anal fin is set very far back on a long, thick tail. They can reach about 3 feet in length. This shark is found in inshore waters on the bottom or tropical reefs in the Indo-west Pacific from Madagascar to Indonesia, the Philippines, and Japan. These sharks are nocturnal, preying at night on bony fish and crustaceans.

Brownbanded Bamboo Shark - Chiloscyllium punctatum

When young, these sharks are medium brown with dark brown bands. As they age, they fade to a more solid medium brown. They’re an elongated, slender carpet shark with a long tail like the whitespotted shark. They live between the shore and the reef on muddy sea floors in the inshore waters of India, Thailand, Singapore, Malaysia, the Philippines, and Australia. Also nocturnal, they prey at night on crabs, worms, and other small prey.

All information found [here] and [here]. Images are not mine.

[zoology-time]

Whitespotted Bamboo Shark, Chiloscyllium plagiosum

[boudhabar]

Dave Fleetham - Philippines, Whitespotted Bamboo Shark (Chiloscyllium Plagiosum), Inside Egg Casing

[oceanforsharks]

Featured Species: Whitespotted Bamboo Shark (Chiloscyllium plagiosum)

Featured Species: Whitespotted Bamboo Shark (Chiloscyllium plagiosum)

This week’s featured species is one of my husband’s favorite shark species, and therefore one that is very special to me, too! (It’s not often my husband admits he likes sharks; he thinks the ocean is boring- GASP! So when he said this was one of his favorite species I almost cried!) The Whitespotted Bamboo Shark (Chiloscyllium plagiosum) is a small member of the Hemiscylliidae family (Ebert,…

[jojobegood1]

Un requin blanc mange une baleine

19.07.2017, 07:14   Règne animal: les requins se servent de leurs épaules pour manger

SCIENCES - Selon une étude, les squales, qui sont dépourvus de langue, donnent des coups d'épaules pour pousser la nourriture jusqu'à leurs dents.

Comment guider les aliments vers ses dents quand on n'a pas de langue? Le requin a trouvé une solution selon une étude publiée mercredi dans Proceedings of the Royal Society B: donner des coups d'épaule.

Pour arriver à cette conclusion, des chercheurs ont observé trois requin-chabots à taches blanches (Chiloscyllium plagiosum) à l'aide d'une technologie aux rayons X permettant de voir les mouvements des os et des muscles à l'intérieur des corps.

Alors que les poissons dévoraient des morceaux de calmars et de harengs, les chercheurs ont constaté "que la 'ceinture d'épaule' des requin-chabots à taches blanches se balançait en arrière pour déplacer les aliments vers la gorge".

Invisible de l'extérieur, la ceinture d'épaule des requins est un morceau de cartilage en forme de "U", point d'attache de plusieurs muscles, situé sous la tête du poisson. On savait déjà que cette épaule contrôlait certaines nageoires de l'animal et était utile à la locomotion.

Mais comme elle n'est pas directement reliée aux mâchoires ni même à la tête du poisson, les chercheurs ne pensaient pas qu'elle puisse également jouer un rôle dans l'alimentation.

Or, "en tirant leur 'ceinture d'épaule' en arrière, les requins créent l'aspiration nécessaire pour pousser la nourriture vers le fond de leur gueule et dans le tube digestif", explique Ariel Camp, chercheur de l'Université Brown et auteur de l'étude.

[rztour-blog]

🦈 TUBARÃO-BAMBU #AquaRioMarinho Tubarões-bambu (Chiloscyllium punctatum / Chiloscyllium plagiosum) são comuns das águas costeiras da parte ocidental do Oceano Pacífico. São chamados dessa forma por causa do padrão de cores que exibem quando jovens, lembrando bambus. Quando se tornam adultos, esse padrão muda, assumindo uma única cor. Possuem a habilidade de “caminhar” sobre bancos e fendas dos recifes de coral e costões rochosos, uma vez que possuem corpos adaptados para este deslocamento terrestre e para ficar fora d'agua por algum tempo. — view on Instagram http://bit.ly/2wKtesq

[sharkest-sharks]

Sand tiger shark (Carcharias taurus) | Whitespotted bamboo shark (Chiloscyllium plagiosum)

[marinebioblog]

A white spotted bamboo shark (Chiloscyllium plagiosum) exhibiting walking behavior.

[todropscience]

UN TIBURÓN HEMBRA NACIDA POR PARTENOGÉNESIS TUVO SU PROPIA DESCENDENCIA A TRAVÉS DE PARTENOGÉNESIS

Investigadores alemanes reportaron dos eventos partenogénicos dentro de una familia de pintarroja colilarga de manchas blancas (Chiloscyllium plagiosum).

La partenogénesis es una forma de reproducción asexual basada en el desarrollo de células sexuales femeninas no fecundadas. Produciendo descendencia sin la necesidad de un macho.

 Una hembra en cautiverio produjo múltiples crías por partenogénesis. Aún más notable fue que una de las hembras nacidas se reprodujo asexualmente nuevamente produciendo descendencia viable. Por lo que se sabe, esta es la primera evidencia confirmada para la segunda generación de la partenogénesis facultativa en vertebrados. Esto quedó demostrado a través de estudios genéticos, indicando la ausencia de material genético de algún macho.  Los resultados fueron publicados en la primera semana de enero en la revista Journal of Fish Biology.

La partenogénesis se produce naturalmente en muchas plantas, en algunas especies de animales invertebrados como en pocos vertebrados. El hallazgo demuestra que un animal concebido por partenogénesis puede ser fértil. Esto implica que la partenogénesis puede ser una alternativa a la reproducción sexual.

image de Johann Kirchhauser del Staatlichen Museum für Naturkunde in Karlsruhe

Referencia: Straube et al. 2016 First record of second-generation facultative parthenogenesis in a vertebrate species, the whitespotted bambooshark Chiloscyllium plagiosum. Journal of Fish Biology

english version

[todropscience]

A BAMBOO SHARK, BORN BY PARTHENOGENESIS AKA VIRGIN BIRTH, HAD ITS OWN OFFSPRING THROUGH PARTHENOGENESISS

German researchers reported two parthenogenetic events within a family of the whitespotted bamboo shark (Chiloscyllium plagiosum). A captive female  produced multiple parthenogens. Even more remarkable was that one of the female parthenogens reproduced asexually again producing viable offspring. As far as is known, this is the first genetically confirmed evidence for second-generation facultative parthenogenesis in vertebrates. This was proven through genetic studies, the results were published in the first week of january in the Journal of Fish Biology.

Parthenogenesis occurs naturally in many plants, some invertebrate animal species and a few vertebrates. The finding shows that an animal conceived by parthenogenesis can be fertile. It implies that parthenogenesis may be an alternative to sexual reproduction. 

image by Johann Kirchhauser vom Staatlichen Museum für Naturkunde in Karlsruhe

Straube et al. 2016 First record of second-generation facultative parthenogenesis in a vertebrate species, the whitespotted bambooshark Chiloscyllium plagiosum. Journal of Fish Biology, in press