Showing posts with label Amazon River. Show all posts
Showing posts with label Amazon River. Show all posts

Catfish



Amazon Rainforest, Ecuador: Jakub Vagner shows off the massive head and mouth of his 8'8" Piraiba Catfish. (Photo credit: © Jakub Vagner)


Whiskered Warriors of the Amazon

Amazon catfish. Whiskered warriors. They fry drags. They bust rods. They snap 80-pound-test line like sewing thread. Some can crush a leg, sink a boat, and then maybe even eat you. They're 100, 200, 300, 400, 500, even 600 pounds of freshwater fury. And in the far reaches of Amazonia, these giant fish remain amazingly abundant. Nowhere on earth does the hardcore catfish angler have such excellent odds for catching the trophy of a lifetime.

When In-Fisherman Magazine published a list of the world's ten toughest fish in 1993, Amazon catfish ranked number one. On a scale of 1 to 10, they scored a 10 for toughness ("Pound for pound the gamest fish on the list"), a 10 for top-end size ("Maybe the biggest pure predators in freshwater'), a 10 for realistic size ("Two-hundred-pounders are probable with the right tackle"), and a 10 for accessibility ("Ranges from difficult to almost impossible").
The piraiba--known as filhote ("youngster") when less than 150 pounds. One of the world's largest freshwater fish, reaching weights approaching 700 pounds. One of the three largest species of catfish, along with the wels of Eurasia and the Mekong catfish of Southeast Asia. The IGFA world record stands at 256 pounds.
The gigantic jaú, one of the largest and least known catfishes, which sometimes exceeds six feet and 220 pounds. A 56-pounder, small fry in the Amazon, could establish a new world record.
The dorado, a favored food fish in South America, which migrates the length of the Amazon every year to spawn, and which often exceeds 100 pounds. The current world record is an 85-pounder.
The redtail catfish--known as pirarara (macaw fish) in Brazil. IGFA world record: 97 pounds, but much larger specimens have been documented. One of the most strikingly colored members of the catfish family, with orange-red fins and tail. A prized catch for all Amazon anglers.
The tiger surubim, an amazing catfish with beautiful markings. Brazilian anglers call it cachara. The 36-pound world record could be broken by an angler aboard theAmazon Voyager. Hundred-pounders have been reported.
The spotted surubim, or pintado, another heavyweight cat with striking coloration. The world record stands at 44 pounds, but there are reports of specimens topping 200

Giant cats are the primary targets, but many smaller species can be taken by catfishing enthusiasts.
The palmito ("heart of palm"), a small whiskerless catfish so named because of its firm, sweet white meat, a favorite on Brazilian dinner tables.
The bico-de-pato, a surubim catfish with an unusual duck-billed snout.
The armau, a weird fruit-eating cat (sometimes over 40 pounds) with rows of armored plates along its sides.
The barba chata ("crazy whiskers"), which has exceedingly long featherlike barbels, and reaches at least 10 pounds.

This list justs scratches the surface. One-third of the 2000 fish species in the Amazon River basin are members of the catfish family . Some cats you catch may be species unknown to science!

Fish at night, when giant cats are most likely to be caught, from the comfort of custom-built boats. Brazilian fishermen familiar with the best catfishing waters will guide you to the honeyholes where the big ones lurk. And if you like, there will be opportunities for other amazing fish species--the giant pirarucu, the world's largest freshwater fish; piranhas, the signature species on everyone's must-catch list; the traíra, a common walleye-sized fighter with a mouth full of wicked teeth; and, of course, the tucanaré, or peacock bass, which hits topwater lures with a ferocity that has to beseen to be believed.

Your adventure in Amazonia will be made all the more memorable by the magnificent sights of the world's largest rainforest. Wildlife abounds along the rivers, including hundreds of birds species such as brightly colored toucans, parrots, and macaws, and the spectacular harpy eagle, one of the world's largest birds of prey. Two species of freshwater dolphins, the tucuxi and boto, often swim alongside the fishing boats. The calls of howler monkeys boom from the jungles each day, and animals such as caimans, river turtles, iguanas, sloths and squirrel monkeys are commonly seen. With luck you might glimpse a jaguar or the endangered giant river otter. No trip you've ever made will be more memorable.

Travel The Amazon For Giant Catfish - Wild Bill's Latest Discovery
Wild Bill and an Amazon Catfish

The Amazon: The Amazon basin is one of the earth's "natural wonders." It contains the world's largest tropical rainforest and encompasses the most diverse ecosystem on the planet! The Amazon River holds 20% of the world's fresh water and 10 of its 1,100 tributaries are more than 1,000 miles long. Over 270 species of birds flock the skies and 1,850 species of fish fill the waters. Amazingly, one third of all species are in the catfish family! Yet the population of the Amazon Basin is less than one person per sq. km. To witness the Amazon is to witness nature as it was originally created!

Colossal Catfish

Tiger Catfish
The tiger catfish (Pseudoplatystoma tigrinum) is among the most beautiful catfishes, and one of the most valuable commercially. It's often caught wild but recent research has begun investigate its potential for commercial aquaculture. Leading the effort is Instituto de Investigaciones de la Amazonía Peruana (IIAP) near Iquitos, Peru, where this photo was taken.


From Wikipedia, the free encyclopedia
Catfishes (order Siluriformes) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat'swhiskers, catfish range in size and behavior from the heaviest and longest, the Mekong giant catfish from Southeast Asia and the second longest, the wels catfish of Eurasia, to detritivores (species that eat dead material on the bottom), and even to a tinyparasitic species commonly called the candiru, Vandellia cirrhosa. There are armour-plated types and also naked types, neither having scales. Despite their name, not all catfish have prominent barbels; members of the Siluriformes order are defined by features of the skull and swimbladder. Catfish are of considerable commercial importance; many of the larger species are farmedor fished for food. Many of the smaller species, particularly the genus Corydoras, are important in the aquarium hobby.

Catfish have one of the greatest ranges in size within a single order of bony fish. Many catfish have a maximum length of under 12 cm. Some of the smallest species of Aspredinidae and Trichomycteridae reach sexual maturity at only 1 centimetre (0.39 in).

The wels catfish, Silurus glanis, is the only native catfish species of Europe, besides the much smaller related Aristotle's catfishfound in Greece. Mythology and literature record wels catfish of astounding proportions, yet to be proven scientifically. The average size of the species is about 1.2–1.6 m (3.9–5.2 ft), and fish more than 2 metres (6.6 ft) are very rare. The largest specimens on record measure more than 2.5 metres (8.2 ft) in length and sometimes exceeded 100 kilograms (220 lb).

The largest Ictalurus furcatus, caught in the Missouri River on July 20, 2010, weighed 130 pounds (59 kg). The largest flathead catfish, Pylodictis olivaris, ever caught was in Independence, Kansas, weighing 123 lb 9 oz (56.0 kg). In July 2009, a catfish weighing 193 pounds was caught in the River Ebro, Spain, by an 11-year old British schoolgirl. However, these records pale in comparison to a giant Mekong catfish caught in northern Thailand on May 1, 2005 and reported to the press almost 2 months later that weighed 293 kilograms (650 lb). This is the largest giant Mekong catfish caught since Thai officials started keeping records in 1981. The giant Mekong catfish are not well studied since they live in developing countries and it is quite possible that they can grow even larger.

External anatomy of catfish
A flattened head allows for digging through the substrate as well as perhaps serving as a hydrofoil. Most have a mouth that can expand to a large size and contains noincisiform teeth; catfish generally feed through suction or gulping rather than biting and cutting prey.However, some families, notably Loricariidae and Astroblepidae, have asuckermouth that allows them to fasten themselves to objects in fast-moving water. Catfish also have a maxilla reduced to a support for barbels; this means that they are unable to protrude their mouths as other fish such as carp.

Most catfish are bottom feeders. In general, they are negatively buoyant, which means that they will usually sink rather than float due to a reduced gas bladder and a heavy, bony head.[3] Catfish have a variety of body shapes, though most have a cylindrical body with a flattened ventrum to allow for benthic feeding.[3]

Catfish may have up to four pairs of barbels: nasal, maxillary (on each side of mouth), and two pairs of chin barbels, although pairs of barbels may be absent, depending on the species. Because their barbels are more important in detecting food, the eyes on catfish are generally small. Like other ostariophysans, they are characterized by the presence of a Weberian apparatus.Their well-developed Weberian apparatus and reduced gas bladder allow for improved hearing as well as sound production.

Catfish have no scales; their bodies are often naked. In some species, the mucus-covered skin is used in cutaneous respiration, where the fish breathes through its skin. In some catfish, the skin is covered in bony plates called scutes; some form of body armor appears in various ways within the order. In loricarioids and in the Asian genus Sisor, the armor is primarily made up of one or more rows of free dermal plates. Similar plates are found in large specimens of Lithodoras. These plates may be supported byvertebral processes, as in scoloplacids and in Sisor, but the processes never fuse to the plates or form any external armor. By contrast, in the subfamily Doumeinae (family Amphiliidae) and in hoplomyzontines (Aspredinidae), the armor is formed solely by expanded vertebral processes that form plates. Finally, the lateral armor of doradids, Sisor, and hoplomyzontines consists of hypertrophied lateral line ossicles with dorsal and ventral lamina.[9]
Juvenile catfish, like most fish, have relatively large heads, eyes and posterior median fins in comparison to larger, more mature individuals. These juveniles can be readily placed in their families, particularly those with highly derived fin or body shapes; in some cases identification of the genus is possible. As far as known for most catfish, features that are often characteristic of species such as mouth and fin positions, fin shapes, and barbel lengths show little difference between juveniles and adults. For many species, pigmentation pattern is also similar in juveniles and adults. Thus, juvenile catfishes generally resemble and develop smoothly into their adult form without distinct juvenile specializations. Exceptions to this are the ariid catfishes, where the young retain yolk sacs late into juvenile stages, and many pimelodids, which may have elongated barbels and fin filaments or coloration patterns.

All catfish, except members of Malapteruridae (electric catfish), possess a strong, hollow, bonified leading spine-like ray on their dorsal and pectoral fins. As a defense, these spines may be locked into place so that they stick outwards, which can inflict severe wounds. In several species catfish can use these fin rays to deliver a stingingprotein if the fish is irritated. This venom is produced by glandular cells in theepidermal tissue covering the spines. In members of the family Plotosidae, and of the genus Heteropneustes, this protein is so strong it may hospitalize humans, those unfortunate enough to receive a sting; in Plotosus lineatus, the stings may result in death.

Sexual dimorphism is reported in about half of all families of catfish. The modification of the anal fin into an intromittent organ (in internal fertilizers) as well as accessory structures of the reproductive apparatus (in both internal and external fertilizers) have been(source )

Anaconda




Also known as a water boa, the anaconda, Eunectes murinus, lives near water, in swamps, and in the Amazon and Orinoco river basis, as well as in the Guianas. Boas are the largest snakes, and the anaconda is the largest boa. There are two kinds: yellow and green anacondas, with the yellow being the smaller.

Anacondas are nocturnal, but they'll sunbathe during the day on a branch over hanging the water. With their protective coloration of green and black patches on its back, they are easily missed by its prey who come to water to drink. Anaconda's jaw formation allows it to open wide enough to consume larger animals, such as birds, small mammals, such as deer, piccaries, and large rodents such as agoutis, in addition to the usual diet of fish. They have been know to swallow even a cayman.

After it eats, an anaconda rests while it digests its meal, sometimes for several weeks, depending on the size of dinner.

Anacondas are viviparous, and anywhere from 20-100 little snakes are born at a time, though not much is known about the snake's breeding cycle.

Among the most notorious and dangerous Amazon rainforest animals, anaconda is something to be reckoned with, certainly not a player to be taken lightly by any means.

It can average 6 meters (18 feet) and 250 kilograms (40 stone) in weigth and considered to be the heaviest and largest in terms of girth of all snakes.
The Amazon rainforest is a gigantic reservoir of life in the Planet, as we all know it.
Millions of species are to be found there, whether fauna or flora, theAmazon rainforest is provably the biggest exhibition of life we have ever came across to date.


There is some controversy around which is the biggest snake in the world.
While the Asiatic Python (Python Reticulatus) holds the record in terms of length (33 feet), the diameter of the green anaconda is far bigger.
In the jungles of South America it can grow as big around as a grown man.
There are many recorded sightings of giant snakes, some dating back to the early discovery of South America, as well as in modern times.
Some have reported to have seen, or killed, snakes of 10.5 meters (34 feet) or even 18 meters (59 feet) but none of this it's been supported by evidence.

The standard size doesn't seem to go beyond 7 meters (21 feet) long.
Its name applies generally to any large snake that crushes its prey by constricting and often used to refer to the (Eunectes Murinus) that inhabits the Amazon and Orinoco river basins, and the Guianas.

However, there are two other species to be found in the region...

    Eunectes Notaeus
    Eunectes Deschauenseei


Member of the boa constrictor family, they rely on their powerful bodies to squeeze their prey until it dies by suffocation or it's crushed to death by internal bleeding.
Having accomplished that, it unghinges its jaw and swallows the victim whole.
It could take several weeks to digest a meal, according to size of prey.
They do have teeth but they are not a venomous snake, so their bite itself it's not fatal, their teeth are only used to hold on to the prey and to prevent it from escaping.

Let's see them in action, having a capybara lunch...


They hunt alone at waters edge, waiting for its prey to drink.
They feed on birds, fish, deer, caiman, capybara, jaguar and humans alike.

Piranha


Amazon River Fish: Piranha


The name piranha comes from Tapi-Guarani language: "pira", fish and "sanha", tooth.
Red-bellied piranhas are the most feared and best known of around 40 species of them.
They have powerful jaws and razor-like triangular teeth that can shred flesh from bone in a matter of seconds.
Amazon indigenous tribes use piranha's teeth for tools and knives, and to sharpen their curare-tipped darts for blowgun hunting.
They feed in large schools and can converge on animals like anacondas, manatees, caymans, birds, etc., but attacks on humans are very rare.
However, it would be unwise to swim having a wound or otherwise bleeding, as they're attracted to the scent of blood, just like sharks.
In dry season, when food becomes scarce, they can be dangerous.
For the most species, piranhas are herbivorous, feeding on fruit and seeds. Their average size goes up to 6-10 inches (15-25 cm.)


The Amazon is home to the piranha, one of the world's most terrifying fish. Up to 60 centimetres long, piranhas hunt in shoals, or packs, and can kill cattle or humans and strip the flesh from their bones in afew minutes.

A piranha at the Memphis Zoo

Kingdom: Animalia
Phylum: Chordata
Subclass: Neopterygii
Infraclass: Teleostei
Family: Characidae
Subfamily: Serrasalminae

You wouldn't want one of these in your fish tank!
Piranhas belong to the subfamily Serrasalminae, which also includes closely related omnivorous fish such as pacus.Traditionally, only the four genera Pristobrycon, Pygocentrus, Pygopristis and Serrasalmus are considered to be true piranhas, due to their specialized teeth. However, a recent analysis showed that, if the piranha group is to be monophyletic, it should be restricted to Serrasalmus, Pygocentrus and part of Pristobrycon, or expanded to include these taxa plus Pygopristis, Catoprion, and Pristobrycon striolatus. Pygopristis was found to be more closely related to Catoprion than the other three piranha genera.

The total number of piranha species is unknown and contested, and new species continue to be described. Estimates range from fewer than 30 to more than 60.
Piranhas are found in the Amazon basin, in the Orinoco, in rivers of the Guyanas, in the Paraguay-Paraná, and the São Francisco River systems. Some species of piranha have broad geographic ranges, occurring in more than one of the major basins mentioned above, whereas others appear to have more limited distributions.

Aquarium piranhas have been introduced into parts of the United States, with specimens occasionally found in the Potomac River, Lake of the Ozarks in Missouri and even as far north as Lake Winnebago inWisconsin, although they typically do not survive cold winters. Piranhas have also been discovered in the Kaptai Lake in southeastBangladesh. Research is being carried out to establish how piranhas have moved to such distant corners of the world from their original habitat. Some rogue exotic fish traders are thought to have released them in the lake to avoid being caught by antipoaching forces.[original research?]

This is the skull of the red-bellied piranha, front view (left) and side view (right). This photo clearly shows the dentition of this infamous fish.



White Piranha
The White Piranha (Serrasalmus rhombeus) grows much larger than the Red-bellied Piranha. Although bigger in size and possessing similar dentition, this species specializes on hunting other fish and does not "swarm" in large schools, so it is less dangerous than the Red-bellied Piranha. Hence, it is necessary to use fish as a bait as they tend to refuse meat bait.


Red Billied Piranha
The guide is holding open the jaws of a Red-bellied Piranha (Pygocentrus nattereri)—the Amazon's most notorious animal. Its powerful bite and sharp teeth can sever a finger or toe, but there are, contrary to popular belief, no confirmed fatalities resulting from a mass attack. Most tours include a fishing expedition during which tourists fish for these piranhas with nothing more than a stick, a hook and a piece of meat.


Some people imagine the Amazon River as teeming with flesh-eating fishes—the deadly piranha. However, the biology of piranhas is not common knowledge. There are in fact at least a dozen different species, belonging to the characin group of fishes. Most eat fallen fruit—not as thrilling as stripping a carcass to the bone, but much more interesting.

Gold Fish Varieties


The goldfish (Carassius auratus auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It was one of the earliest fishto be domesticated, and is one of the most commonly kept aquarium fish.
A relatively small member of the carp family (which also includes the koi carp and the crucian carp), the goldfish is a domesticated version of a less-colorful carp (Carassius auratus) native to east Asia. It was first domesticated in China more than a thousand years ago, and several distinct breeds have since been developed. Goldfish breeds vary greatly in size, body shape, fin configuration and coloration (various combinations of white, yellow, orange, red, brown, and black are known).


Varieties of domesticated goldfish

Selective breeding over centuries has produced several color variations, some of them far removed from the "golden" color of the originally domesticated fish. There are also different body shapes, fin and eye configurations. Some extreme versions of the goldfish live only inaquariums—they are much less hardy than varieties closer to the "wild" original. However, some variations are hardier, such as the Shubunkin. The main varieties are:

Common goldfish differ only in color from their closest relative, the Prussian carp. Common goldfish
come in a variety of colors including red, orange/gold, white, black and yellow or 'lemon' goldfish.
Common goldfish.JPG
The Black moor is a telescope-eyed variety of fancy goldfish that has a characteristic pair of protruding eyes. It is also referred to as popeye, telescope, kuro demekin in Japan and dragon-eye inChina.Black Moor Goldfish.jpg
The small, fancy Bubble Eye has upward pointing eyes accompanied by two large fluid-filled sacs.Bubble Eye goldfish.jpg
Fancy Celestial eye goldfish or Choten gan has a double tail and a breed-defining pair of upturned, telescope eyes with pupils gazing skyward.
チョウテンガン.jpg
The comet or comet-tailed goldfish is the most common fancy variety in the United States. It is similar to the common goldfish, except slightly smaller and slimmer, and is mainly distinguished by its long, deeply forked tail.Domesticcometgoldfish.jpg
The Fantail goldfish is the western form of theRyukin and possesses an egg-shaped body, a high dorsal fin, a longquadruple caudal fin, and no shoulder hump.Fan tailed goldfish.jpg
The fancy lionhead has a hood. This fish is theprecursor to the ranchu.LionheadGoldfishSideviewRodsan18b.jpg
The fancy oranda is characterized by a prominent raspberry-like hood or (also known as wen or headgrowth) that encases the whole head except for the eyes and mouth.OrangeOranda.jpg
The fancy pearlscale orchinshurin in Japanese, is spherical-bodied with finnage similar to thefantail.Goldfish Pearl Scale.jpg
The fancy Pompoms or pompon or hana fusahave bundles of loose fleshy outgrowths between the nostrils, on each side of the head.
The fancy ryukin has a short, deep body with a characteristic shoulder hump.Goldfish Ryukin.jpg
Fancy and hardyJapanese Shubunkins(朱文金?) (translated literally as "red brocade") have single tail withnacreous scales, and a pattern known ascalico.Clear shubunkin.jpg
The fancy telescope eye or demekin is characterized by its protruding eyes. It is also known as globe eye or dragon eye goldfish.GoldfishDroganeys.jpg
The fancy Japanese ranchu is hooded. Japaneserefer to it as the "king of goldfish".Goldfish Ranchu 2.jpg
The fancy panda moorhas a characteristic black-and-white color pattern and protruding eyes.Pandamoor.jpg


The fancy veiltail is known for its extra-long, flowing double tail. Modern veiltail standards require little or no indentation of the trailing edges of the caudal fins, as in a wedding veil for a bride.Welon (ryba).JPG

The Butterfly Tail Moor or Butterfly Telescopeis of the telescope-eye lineage, with twin tails best viewed from above. The spread of the caudal fins mimics butterflies underwater.Calico-butterfly-tail-demekin.png



Related species

A pale silvery and brownish fish, facing left
A wild Prussian carp (Carassius auratus gibelio)
A golden colored fish with silvery highlights, facing right
A Crucian carp (Carassius carassius)
Goldfish were bred from Prussian carp (Carassius auratus gibelio) in China, and they remain the closest wild relative of the goldfish.Previously, some sources claimed the Crucian carp (Carassius carassius) as the wild version of the goldfish. However, they are differentiated by several characteristics. C. auratus have a more pointed snout while the snout of a C. carassius is well rounded. C. gibeliooften has a grey/greenish color, while crucian carps are always golden bronze. Juvenile crucian carp have a black spot on the base of the tail which disappears with age. In C. auratus this tail spot is never present. C. auratus have fewer than 31 scales along the lateral line while crucian carp have 33 scales or more.
When found in nature, goldfish are olive green. Introduction of goldfish into the wild can cause problems for native species. Goldfish can hybridize with certain other species of carp. Within three breeding generations, the vast majority of the goldfish spawn revert to their natural olive color. The mutation that gave rise to the domestic goldfish is also known from other cyprinid species, such as common carpand tench. Koi may also interbreed with the goldfish to produce a sterile hybrid fish.
There are many different varieties of domesticated goldfish. Fancy goldfish are unlikely to survive in the wild because of their bright fin colors; however the hardier varieties such as the Shubunkin may survive long enough to breed with wild cousins. Common and comet goldfish can survive, and even thrive, in any climate that can support a pond.