Walleye (Sander vitreus) Details

Sander vitreus, commonly known as the walleye, is a freshwater fish native to North America. It has a slender body with a golden-green back and silvery sides. Its distinguishing features include a large mouth with a protruding lower jaw and two large canine teeth. It is typically found in clear, cool lakes and rivers, and can live up to 10 years. The current population of Sander vitreus is stable.

Name Origin: The scientific name of the organism, Sander vitreus, is derived from the Latin words sander, meaning "pike" and vitreus, meaning "glassy". This is likely in reference to the species' long, slender body and its glassy, reflective scales.

Related Species: Coregonus artedi, Coregonus clupeaformis, Coregonus lavaretus, Coregonus zenithicus

Sander vitreus scientific classification

Kingdom: Animal

Phylum: Actinopterygii

Class: Fish

Order: Fish

Family: Percidae

Genus: Salmo

Species: Fish

Understanding the Walleye habitat

Sander vitreus, commonly known as the walleye, is a freshwater fish that prefers to live in clear, cool, and deep lakes. They are usually found near rocky shorelines and in areas with plenty of vegetation. They are also known to inhabit areas with submerged logs and other structures. The walleye is an opportunistic feeder, meaning they will eat whatever is available. They are often found in the company of other fish such as bass, perch, and pike. The walleye is an important part of the food chain and is a popular game fish. They thrive in an environment with plenty of oxygen, a temperature range of 45-75 degrees Fahrenheit, and a pH level of 6.5-8.5.

Native country: N. America, Europe, Asia.

Native continent: They are native to North America, mainly found in the Great Lakes region.

Other organisms found in habitat: Trout, Perch, Zooplankton, Aquatic Insects, Algae, Seaweed

Physical characteristics of the Sander vitreus

Appearance Summary: Sander vitreus is a freshwater fish with a long, slender body and a large, slightly oblique mouth. It has a silvery-green coloration with a dark lateral stripe running from the gill cover to the tail. Its fins are yellowish-green and its scales are large and easily visible. It has a long, pointed snout and a large eye. Its caudal fin is deeply forked and its anal fin is long and pointed. It has a large, rounded pectoral fin and a small, pointed pelvic fin. Its dorsal fin is long and pointed and its adipose fin is short and rounded.

What are the distinct features of Walleye? Large, elongated body, olive-green to brown in color, yellowish spots, large eyes, upturned mouth, long dorsal fin, long anal fin, large pectoral fins, large scales, no vocalizations, solitary behavior, migratory, feeds on small fish and invertebrates

What makes them unique?

Walleye body color description: The most common colors of Sander vitreus are olive green, brown, and yellow.

skin type: The exterior of Sander vitreus is smooth and slimy, with a glossy sheen. Its scales are small and tightly packed, giving it a slightly bumpy texture.

Strengths: Adaptability, Camouflage, Fast Swimming, High Reproductive Rate, Omnivorous Diet

Weaknesses: Susceptible to parasites, Poor vision, Slow swimming speed, Limited diet, Limited habitat range

Common Walleye behavior

Sander vitreus behavior summary: Sander vitreus, commonly known as the walleye, is a freshwater fish that is found in North America. It is an active predator, using its sharp vision to locate prey. It is an ambush predator, hiding in the shadows of rocks and vegetation to surprise its prey. It is also an aggressive fighter, using its sharp teeth to defend itself against predators. It is a bottom-dweller, using its fins to move along the bottom of the lake or river. It is also a social creature, often found in schools of other walleyes.

How do they defend themselves? Sander vitreus, commonly known as the walleye, is a freshwater fish that defends itself from attacks by using its camouflage coloring to blend in with its environment. It also has a sharp spiny dorsal fin that can be used to deter predators. Additionally, the walleye has a large mouth with sharp teeth that can be used to bite predators.

How do Walleye respond to stimuli in their environment? Vocalization, Visual Signals, Chemical Signals

How do Walleye gather food? Sander vitreus, commonly known as the walleye, is a predatory fish that hunts by sight. It needs clear, oxygen-rich water to survive and can be found in lakes, rivers, and streams. To hunt, the walleye uses its sharp vision to detect prey in the water and then quickly darts forward to catch it. Challenges faced by the walleye include competition for food, changes in water temperature, and the presence of predators.

How do Walleye communicate in their environment? They use a variety of methods to communicate with other organisms, such as sound, body language, and chemical signals. They also use visual cues, like color changes, to communicate with other fish in their environment. They can also use electrical signals to communicate with other fish in their vicinity.

Examples: They use visual cues, such as body coloration, to communicate;They use chemical cues, such as pheromones, to communicate;They use sound cues, such as drumming, to communicate

How does the Walleye get territorial? Defend territory, Mark territory, Chase intruders,

Diet and Predators

Diet Summary: Sander vitreus primarily feeds on small fish, crustaceans, and mollusks. Commonly consumed foods include herring, smelt, shad, and alewives. Toxic and unhealthy foods for this organism include plastic debris, chemical pollutants, and other contaminants.

Predators: Sander vitreus, commonly known as the walleye, is a popular game fish found in many freshwater lakes and rivers. Unfortunately, this species is threatened by a variety of predators, including northern pike, muskellunge, and large-mouth bass. Additionally, environmental changes such as water pollution, habitat destruction, and climate change can have a negative impact on the population growth of this species.

Threats: Fishing, Pollution, Habitat Loss, Disease, Predation by Other Fish Species

Life cycle & population of the Sander vitreus & Fish

Life cycle: Sander vitreus, commonly known as walleye, is a freshwater fish native to North America. It has a typical lifespan of 6-9 years and reproduces through spawning. Spawning typically occurs in the spring when water temperatures reach around 10°C. During spawning, the female will lay her eggs in a nest that the male has previously constructed. The eggs will hatch in about a week and the fry will remain in the nest for a few days before dispersing. The fry will then feed on plankton and small invertebrates until they reach maturity.

Average offspring size: 20-50 cm

Most common health issues: Skin irritation, Respiratory irritation, Eye irritation, Allergic reactions

Threats: Fishing, Pollution, Habitat Loss, Disease, Predation by Other Fish Species

Common diseases that threaten the Walleye population: Fin Rot, Swim Bladder Disease, Columnaris Disease, Ichthyophthirius multifiliis, Bacterial Gill Disease, Vibrio Infection, Amyloodinium Ocellatum, Saprolegniasis, Trichodina Infection, Hexamita Infection

Population: Sander vitreus population has been steadily decreasing since 2010, with the lowest population recorded in 2018. The population peaked in 2008 at over 1.5 million individuals. From 2008 to 2010, the population decreased by about 500,000 individuals. From 2010 to 2018, the population decreased by about 1 million individuals.

Walleye Environment

How do Walleye adapt to their environment Sander vitreus, commonly known as the walleye, is a freshwater fish that has adapted to its environment by developing a large eye and a light-sensitive layer of cells on its skin. This allows the walleye to see in low light conditions and to detect movement in the water, helping it to find food and avoid predators. For example, walleye can be found in the Great Lakes, where they use their adaptations to survive in the deep, dark waters.

What's their social structure? Sander vitreus, commonly known as walleye, is a species of fish that is found in freshwater lakes and rivers. They are a top predator in their environment, meaning they are at the top of the food chain. They feed on smaller fish, crustaceans, and insects. Walleye are known to be social creatures, and they interact with their family and species in a variety of ways. They form schools of fish, and they also communicate with each other through sound. Walleye are also known to be territorial, and they will defend their territory from other fish. They are also known to be monogamous, meaning they will form a pair bond with one mate for life.

How would you describe their survival instincts? They have a variety of survival instincts that allow them to respond to their environment. They have the ability to detect changes in water temperature, salinity, and oxygen levels, and can use this information to adjust their behavior accordingly. They also have the ability to detect light and dark, and can use this to hide from predators or to find food. Additionally, they can detect vibrations in the water, which helps them to detect the presence of predators or prey.