Carinotetraodon imitator

Last updated

Carinotetraodon imitator
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Tetraodontiformes
Family: Tetraodontidae
Genus: Carinotetraodon
Species:
C. imitator
Binomial name
Carinotetraodon imitator
Britz & Kottelat, 1999 [2]

Carinotetraodon imitator, [3] commonly known as the dwarf Malabar pufferfish, is a freshwater pufferfish found in the Western Ghats of India, with little information available on its complete distribution. It is one of the smallest pufferfish in the world, and closely resembles the related Carinotetraodon travancoricus .

Contents

Description

C. imitator has a maximum recorded standard length (SL) of 2.65 cm (1.04 in), making it one of the smallest pufferfish in the world. [2] The species is sexually dimorphic. Males have bodies and fins which are dirty yellow to orange in colour and are covered in dark blotches. The ventrum is dirty white to dirty yellow, becoming brownish toward the midventral line and forming a stripe from their lower lip to their caudal peduncle, surrounding the anal fin, where the stripe is broader and darker. An erectable skin keel along the ventral and dorsal surfaces is present in males. Females also possess the dark spots and blotches. The body of females is light brown to beige with a white ventrum. They lack the midventral stripe, but the area around their anal fin is darker and sometimes extends as a short stripe to the lower half of the caudal fin base. The patterns and colouration varies between individuals of both sexes, and their dark spots may be conspicuous or faint or broken into several smaller spots. [2]

C. imitator closely resembles C. travancoricus (pictured) Carinotetraodon travancoricus by Parazelsus (cropped).jpg
C. imitator closely resembles C. travancoricus (pictured)

Distinguishing from Carinotetraodon travancoricus

C. imitator can be distinguished from its congener, as the males have brighter yellow colouration and have smaller, faint blotches compared to males of C. travancoricus, and lack the iridescent blue lines behind the eye. Females have smaller and fainter body blotches than C. travancoricus females, in addition to a number of small spots, [4] though females of C. tranvancoricus may also have small spots between their larger, darker blotches. [5] The most notable difference, however, is the body spination, which is greatly reduced in C. imitator compared to C travancoricus. [4]

Distribution and habitat

In 1999, the species was first described based on specimens in an aquarium in Germany. [4] Information gathered through the importer from the exporter indicated that the species originated in India, and was found in small rivers in Kochi, probably from Ernakulam and neighbouring districts. The specimens were being kept with a number of C. tranvancoricus, suggesting either the two species occur together, or were later mixed by collectors or exporters. [4] They have since been found in mid- and lowland reaches of Kumaradhara and Addahole, Netravati River basin in Karnataka, as well as shallow streams. They inhabit bodies of water with sand, gravel, or stones making up the substrate. There is no information on its complete distribution. [1]

Reproduction

Reproduction of C. imitator has been observed only in captivity. During observation, the water was kept slightly brackish, with 10 L (2.6 US gal) of sea water per 60 L (16 US gal) of freshwater, and its temperature fluctuated between 20–24 °C (68–75 °F). During courting, males erect their keels and their bodies become bright yellow to orange and without marks. They court females while chasing away other males. Males attempted to attract females to the spawning site by swimming back and forth between the female and the site, sometimes trying to push the female toward the spawning site. Females ready to spawn would follow the male to the site, and spawning occurred in java moss. The female and male pressed their bodies together, both in a half-circle, and the female would release one or two eggs during the bout. Pairs may have up to ten or more bouts per spawning sequence. No parental care or fanning was observed outside of the male's defense of the spawning territory. When researchers attempted to recover eggs, they were never able to collect more than ten per spawning sequence, suggesting conspecifics may engage in egg cannibalism and were successful, despite the guarding male. [4]

Eggs are approximately 1.6 mm (0.063 in) in diameter. They are round and have a micropyle at the tip of a wart-like protrusion. They possess no obvious adhesiveness. Eggs were seen to hatch after seven days at 22–24 °C (72–75 °F). Hatched larvae are 3.5 mm (0.14 in) long. They are brownish with two translucent vertical bands, one behind the yolk sac and one at the end of the caudal fin. With the use of adhesive cells along the ventral yolk sac, larvae are able to attach themselves to substrate. [4]

Conservation status

The species is listed as data deficient on the IUCN Red List, as it is one of the least known freshwater fish of the Western Ghats and may be "a very rare species". [1] There is little or no information available on its complete distribution, population, biology, or threats. However, this fish is widely available internationally in the aquarium trade, indicating local exporters may have more knowledge. Overharvesting for the aquarium trade is a potential threat to the species. [1]

Related Research Articles

<span class="mw-page-title-main">Tetraodontidae</span> Family of pufferfish

Tetraodontidae is a family of primarily marine and estuarine fish of the order Tetraodontiformes. The family includes many familiar species variously called pufferfish, puffers, balloonfish, blowfish, blowers, blowies, bubblefish, globefish, swellfish, toadfish, toadies, toadle, honey toads, sugar toads, and sea squab. They are morphologically similar to the closely related porcupinefish, which have large external spines. The scientific name refers to the four large teeth, fused into an upper and lower plate, which are used for crushing the hard shells of crustaceans and mollusks, their natural prey.

<span class="mw-page-title-main">Tiger barb</span> Species of fish

The tiger barb or Sumatra barb, is a species of tropical cyprinid fish. The natural geographic range reportedly extends throughout the Malay Peninsula, Sumatra and Borneo in Indonesia, with unsubstantiated sightings reported in Cambodia. Tiger barbs are also found in many other parts of Asia, and with little reliable collection data over long periods of time, definite conclusions about their natural geographic range versus established introductions are difficult. Tiger barbs may sometimes be confused with Puntigrus anchisporus, Puntigrus navjotsodhii, or Puntigrus partipentazona, which are similar in appearance, the only differences being the slightly different stripe pattern and the number of scales these fish have.

<i>Pterophyllum</i> Genus of fish

Pterophyllum is a small genus of freshwater fish from the family Cichlidae known to most aquarists as angelfish. All Pterophyllum species originate from the Amazon Basin, Orinoco Basin and various rivers in the Guiana Shield in tropical South America. The three species of Pterophyllum are unusually shaped for cichlids being greatly laterally compressed, with round bodies and elongated triangular dorsal and anal fins. This body shape allows them to hide among roots and plants, often on a vertical surface. Naturally occurring angelfish are frequently striped transversely, colouration which provides additional camouflage. Angelfish are ambush predators and prey on small fish and macroinvertebrates. All Pterophyllum species form monogamous pairs. Eggs are generally laid on a submerged log or a flattened leaf. As is the case for other cichlids, brood care is highly developed.

<i>Maylandia lombardoi</i> Species of fish

Maylandia lombardoi, is a 13 centimetres (5.1 in) long freshwater fish from the family Cichlidae. This species is popular in the aquarium hobby where it is sold under a variety of common names including: lombardoi mbuna, kenyi mbuna or kennyi mbuna or kenyi cichlid. This species is sometimes seen in the genus Metriaclima owing to a dispute in which a minority of cichlid researchers do not consider Maylandia valid (see Maylandia for discussion. The specific name honours the exotic fish dealer John Lombardo.

<i>Corydoras panda</i> Species of fish

Corydoras panda is a species of catfish belonging to the genus Corydoras, of the family Callichthyidae, and is a native member of the riverine fauna of South America. It is found in Peru and Ecuador, most notably in the Huánuco region, where it inhabits the Río Aquas, the Río Amarillae, a tributary of the Río Pachitea, and the Río Ucayali river system. The species was first collected by Randolph H. Richards in 1968, and was named Corydoras panda by Nijssen and Isbrücker in 1971. The specific name is an allusion to the appearance of the fish, which possesses large black patches surrounding the eyes, reminiscent of those found on the giant panda. Accordingly, the common names for this fish, which is a popular aquarium species, are panda corydoras and panda catfish.

<i>Puntigrus partipentazona</i> Species of fish

Puntigrus partipentazona, the Dwarf Tiger Barb, is a species of cyprinid fish native to Southeast Asia where it is found in the Mekong, Mae Klong, and Chao Phraya basins of Thailand, the Malay Peninsula, and coastal streams of southeast Thailand and Cambodia where it occurs in streams and impoundments with dense weed growth. It can also be found in the aquarium trade. It is frequently misidentified as the similar Puntigrus tetrazona.

<i>Carinotetraodon</i> Genus of fishes

Carinotetraodon is a polyphyletic genus of small freshwater pufferfish found in South and Southeast Asia.Several species have commercial importance as aquarium fish.

<i>Mikrogeophagus altispinosus</i> Species of fish

Mikrogeophagus altispinosus is a species of fish endemic to the southern Amazon River basin in Brazil and Bolivia. The species is part of the family Cichlidae and subfamily Geophaginae. It is a popular aquarium fish, traded under the common names Bolivian butterfly, Bolivian ram, Bolivian ram cichlid, and ruby crown cichlid.

<span class="mw-page-title-main">Dwarf pufferfish</span> Species of fish

The dwarf pufferfish, also known as the Malabar pufferfish, pygmy pufferfish, or pea pufferfish, is a small freshwater pufferfish endemic to Kerala and southern Karnataka in Southwest India. They are popular in aquaria for their bright colours and small size. At a maximum total length of 3.5 cm, dwarf pufferfish are one of the smallest pufferfish in the world. They closely resemble the related Carinotetraodon imitator, and the two can be difficult to distinguish. C. imitator was not recognised as a different species until 1999.

<span class="mw-page-title-main">Map puffer</span> Species of fish

The map puffer, also known as the map pufferfish, scribbled pufferfish, or Kesho-fugu, is a demersal marine fish belonging to the family Tetraodontidae. The map puffer is typically found in tropical and subtropical waters from the Indian Ocean to the western Pacific Ocean. This fish contains tetrodotoxin, a potent and deadly chemical compound used to ward off predators. Despite being highly poisonous, the map puffer can be found both in the aquarium trade and certain food markets.

<i>Carinotetraodon irrubesco</i> Species of fish

Carinotetraodon irrubesco, known commonly as the red-tail dwarf puffer, is a freshwater pufferfish found only in the lower Banyuasin basin in South Sumatra and the Sambas River in West Kalimantan.

<i>Protomelas kirkii</i> Species of fish

Protomelas kirkii is a species of cichlid endemic to Lake Malawi where it is most commonly found in areas vegetated with Vallisneria. This species can reach a length of 18 centimetres (7.1 in) TL. This species can also be found in the aquarium trade.

<i>Nannostomus trifasciatus</i> Species of fish

Nannostomus trifasciatus,, commonly known as the three-lined or three-stripe pencilfish, is a freshwater species of fish belonging to the characin family Lebiasinidae. They are popular in the aquarium trade due to their small size, beautiful color pattern, and relative hardiness.

<span class="mw-page-title-main">Tank goby</span> Species of fish

Glossogobius giuris, the tank goby, is a species of goby native to fresh, marine and brackish waters from the Red Sea and East Africa through South Asia and the Indian Ocean to China, Australia and the islands of the Pacific Ocean. This species can also be found in the aquarium trade. It is also known as the bar-eyed goby, flat-headed goby and the Gangetic tank goby.

<i>Arothron meleagris</i> Species of fish

Arothron meleagris, commonly known as the guineafowl puffer or golden puffer, is a pufferfish from the Indo-Pacific, and Eastern Pacific. It is occasionally harvested for the aquarium trade. It reaches 50 cm in length.

<span class="mw-page-title-main">Odessa barb</span> Species of fish

The Odessa barb is a species of cyprinid fish known from Central Myanmar, where it is known to occur in an artificial pond above the Anisakan Falls and also from the lower Chindwin River. For many years it has been known to the aquarium hobby, where it has frequently been confused with the less colourful ticto barb, but it was only described scientifically in 2008.

<span class="mw-page-title-main">Common dragonet</span> Species of fish

The common dragonet is a species of dragonet which is widely distributed in the eastern North Atlantic where it is common near Europe from Norway and Iceland southwards. It is a demersal species that occurs over sand bottoms. It lives to a maximum age of around seven years. It is caught in bycatch by fisheries and is used in the aquarium trade.

<i>Pelvicachromis sacrimontis</i> Species of fish

Pelvicachromis sacrimontis is a freshwater fish of the cichlid family known only from a small area of southeastern Nigeria. Currently Fishbase considers this binomial to be a junior synonym of P. pulcher and, it was also known as Pelvicachromis camerunensis, P. pulcher "form B" or P. sp. aff. pulcher but some authorities now consider it to be a valid species. It is occasionally available in the tropical fish trade as "giant krib" and there are three colour morphs – red, green and yellow. And are the most colorful of the Pelvicachromis family. Today its popularity increases due to more order demands by aquarium hobbyists.

<span class="mw-page-title-main">Threestripe gourami</span> Species of fish

The threestripe gourami, also known as the Mekong croaking gourami, is a species of freshwater ray-finned fish from the subfamily Macropodusinae which is part of the gourami family Osphronemidae. It is native to south-east Asia.

Oxyeleotris nullipora, the poreless gudgeon, is a gudgeon of the genus Oxyeleotris, a freshwater fish found in Australia and Papua New Guinea.

References

  1. 1 2 3 4 Ali, A.; Raghavan, R.; Britz, R. (2011). "Carinotetraodon imitator". IUCN Red List of Threatened Species . 2011: e.T172467A6898031. doi: 10.2305/IUCN.UK.2011-1.RLTS.T172467A6898031.en . Retrieved 19 November 2021.
  2. 1 2 3 Britz, R.; Kottelat, M. (May 1999). "Carinotetraodon imitator, a new freshwater pufferfish from India (Teleostei: Tetraodontiformes)". Journal of South Asian Natural History. 4 (1). Sri Lanka: Wildlife Heritage Trust of Sri Lanka: 39–47. ISSN   1022-0828 . Retrieved 19 May 2022.
  3. Froese, Rainer; Pauly, Daniel (eds.) (2014). "Carinotetraodon imitator" in FishBase . November 2014 version.
  4. 1 2 3 4 5 6 Britz, Ralf; Ali, Anvar; Philip, Siby; Kumar, Krishna; Raghavan, Rajeev (2012). "First record from the wild of Carinotetraodon imitator in Peninsular India (Teleostei: Tetraodontiformes: Tetraodontidae)". Ichthyological Exploration of Freshwaters. 23 (2): 105–109. Retrieved 20 May 2022.
  5. Hellweg, Mike (March 2007). "The Dwarf Puffer: A Pleasant Little Surprise". www.tfhmagazine.com. TFH Magazine . Retrieved 20 May 2022.