Animals
Is Rhinoceros Extinct? – What is the Value of Rhino Horn?
Is Rhinoceros Extinct?
If you’re curious about the status of rhinos in the wild, you’ve come to the right place.
The Northern white rhino is no longer in existence, but the Southern black rhino population is thriving. Sadly, the Western black rhino isn’t so lucky.
You might be wondering what’s causing this drastic decline in the population. Well, the answer to this question isn’t so simple. It all comes down to how humans have been destroying their habitat.
This article explores some of the threats rhinoceros face, and how to protect them.
Northern white rhinos are extinct
The population of the northern white rhino was around 2,360 in the 1960s. But widespread poaching and civil wars wiped out nearly 90% of the population.
By the 1990s, only 15 Northern white rhinos were left in the Garamba National Park in the DRC.
Only after joint international rescue action and strict protection did the rhino population begin to increase again. The population then stabilized at about 30 in 1994. In July 2003, the population was estimated to be only about 200.
Scientists at the Scripps Research Institute in La Jolla, California, have discovered that the northern white rhinos contain stem cells that can turn into other animal cell types.
By triggering these stem cells to produce gametes, researchers hope to be able to revive the species.
The scientists also hope to use this technique to revive other species of endangered animals. However, this method is not a fool-proof solution.
Southern white rhino population is thriving
A consortium of research institutes has made it possible to successfully conceive a calf of the southern white rhino using northern white rhino embryos.
The consortium, called BioRescue, consists of the Leibniz Institute for Zoo and Wildlife Research in Germany, Safari Park Dvur Kralove in the Czech Republic, and the Ol Pejeta Conservancy in Kenya.
In July, the group announced that it had created 12 embryos from the northern white rhino’s eggs. This is a huge step forward for this endangered species, which is facing a dwindling population in its natural habitat.
While some scientists argue that these efforts have failed, others believe they are working. The conservation efforts have helped create a number of embryos from the skin cells of dead rhinos.
The research, known as “reproductive cell curing,” will allow scientists to help the long-term survival of the rhino population.
This research will also allow scientists to use genetic material from long-dead rhinos in their breeding programs. While this is expensive, it will help protect the southern white rhino from extinction and ensure that its population continues to grow.
Eastern-black rhinos are endangered
Despite recent progress in conservation efforts, eastern-black rhinos remain endangered. Illegal poaching remains the number one threat to rhinos in East Africa.
Fortunately, a concerted conservation effort in Kenya, which is home to 80% of eastern black rhinos, has stabilized or increased their numbers.
The Ol Pejeta Conservancy in Kenya is one such conservation effort. The organization is a partner with the Tanzania Wildlife Management Authority, and works to increase rhino populations in the park.
While adult male black rhinos are semi-social at waterholes, they are not particularly social. In general, they maintain a 3.9-4.7 km-wide territory.
Males tend to be dominant and younger individuals are subordinate, while females usually stay in the company of their latest calf.
Their poor eyesight prevents them from displaying their social skills in public, but they communicate with one another through scent-marking.
Western black rhinos are not so fortunate
The western black rhino is one of the last of the five subspecies of black rhinos. It was hunted to near extinction for its horns.
Despite its poor eyesight, this species had a remarkably good sense of smell and hearing.
Unfortunately, it’s not so fortunate in Cameroon. This African nation has faced many problems including corruption, unrest, and currency devaluation.
There are many ways to protect these animals, but sadly, the biggest problem is poaching. The western black rhino is more valuable when dead than alive.
A kilogram of horn can fetch $100,000. It is also valued as a symbol of wealth, and has been used in traditional Chinese medicine for over 2,000 years.
It has been used to treat rheumatism and fever, and Vietnamese and Yemeni people have even used it as a material to make ceremonial knife handles.
Value of rhino horn on the black market
The value of rhino horn on the black market is astronomical. One kilogram of rhino horn can sell for more than US$400,000.
The horns, which are mainly found in Asia, can weigh from one to three kilograms each. Its use is primarily for traditional medicine, with the horn said to relieve hangovers, cleanse the body, and alleviate high fever.
It is also often supplied to the art and antiques trade in China, which can fetch several hundred dollars per kilogram.
While it is illegal to trade rhino horn, its value on the black market is astronomical.
Many journalists, particularly in the quality press, often quote this figure in their articles.
As a result, many journalists fail to mention that the value of rhino horn is only worth $100,000 USD per kilogram. This is far more expensive than the price of platinum.
Nevertheless, this value is often quoted in articles about rhino poaching.
Threats to rhinoceros
Despite their charisma and dazzling beauty, the rhinoceros faces numerous threats. The dwindling budgets of range-state governments have a negative impact on conservation efforts.
Furthermore, rhinoceros are increasingly vulnerable to poaching by well-armed gangs.
Insufficient funding for conservation law enforcement agencies has increased rhino poaching threats.
One of the major threats to rhinoceros is habitat loss and extensive poaching, which began in the early 1800s.
Seismic activity on Java threatens the Rhinoceros sondaicus population. However, the Asian Rhino Specialist Group has established a plan to increase its population, including relocation of individuals.
Natural reproduction has not been studied in the Viet Nam population, so the remaining individuals may be the same sex or too old to reproduce.
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Unveiling the Mysteries of Sexual Dimorphism in Crested Geckos
Crested geckos, also known as Correlophusciliatus, have rapidly gained popularity among reptile enthusiasts. These adorable, hardy creatures, native to New Caledonia, are known for their distinct crest of spikes running from their eyes to their tails. Understanding the sexual dimorphism in crested geckos is crucial for breeders, hobbyists, and anyone interested in these fascinating reptiles.
In this comprehensive guide, we’ll dive deep into the differences between male and female crested geckos, how to determine their sex, and why this knowledge is important.
What is Sexual Dimorphism?
Sexual dimorphism refers to the differences in appearance between males and females of the same species. In many animals, these differences are quite pronounced, while in others, like crested geckos, they can be subtler. Identifying these differences is essential for proper care, breeding, and understanding the behavior of these geckos.
Why Knowing the Sex of Your Crested Gecko is Important
Determining the sex of your crested gecko can influence several aspects of their care:
- Breeding: If you plan to breed crested geckos, knowing their sex is obviously crucial.
- Behavior: Males and females can exhibit different behaviors, particularly when it comes to territory and mating.
- Health: Certain health issues are sex-specific, such as egg-binding in females.
How to Determine the Sex of a Crested Gecko
Sexing crested geckos can be challenging, especially when they are young. Here are some methods to identify the sex of your crested gecko:
1. Pre-Anal Pores and Spurs
One of the most reliable ways to differentiate males from females is by looking at the pre-anal pores and spurs.
- Pre-Anal Pores: Males have a series of pre-anal pores located just in front of the vent, which secrete pheromones. These pores are absent in females.
- Spurs: Males usually have spurs (small bumps) near the base of their tails, which are part of their reproductive anatomy.
2. Hemipenal Bulges
Male crested geckos have noticeable hemipenal bulges at the base of their tails, which house their reproductive organs. Females lack these bulges, making their tail base smoother.
3. Behavior Observationy56
While not as definitive as physical characteristics, observing behavior can provide clues:
- Males are often more territorial and may exhibit more dominant behavior.
- Females tend to be more passive, although this can vary widely among individuals.
4. Size and Growth Rate
Generally, males tend to grow larger and bulkier than females, but this is not a foolproof method as growth can be influenced by many factors, including diet and environment.
At What Age Can You Determine the Sex?
It’s typically easier to determine the sex of a crested gecko once they reach a weight of around 20 grams, which usually occurs at about six to eight months of age. Prior to this, the physical differences are less pronounced and can be more challenging to identify.
Physical Differences Between Male and Female Crested Geckos
Let’s delve deeper into the physical characteristics that set male and female crested geckos apart.
Male Crested Geckos
- Hemipenal Bulges: These bulges are located at the base of the tail and become more pronounced as the gecko matures.
- Pre-Anal Pores: Visible as a line of small, dark dots just in front of the vent.
- Spurs: Small, noticeable bumps near the tail base.
- Size and Build: Males often have a more robust build, particularly around the head and neck.
Female Crested Geckos
- Lack of Hemipenal Bulges: The tail base is smooth without noticeable bulges.
- Absence of Pre-Anal Pores: Females do not have pre-anal pores.
- Build: Females can be slightly smaller and less bulky compared to males, though this is not always a reliable indicator.
Behavioral Differences Between Male and Female Crested Geckos
Behavioral observations can provide additional insights into the sex of your crested gecko.
Male Behavior
- Territorial: Males are more likely to display territorial behavior, especially when housed with other males.
- Active and Bold: They tend to be more active and bold, particularly during the breeding season.
- Vocalizations: Males might vocalize more, using clicks and chirps to communicate, particularly during mating rituals.
Female Behavior
- Less Territorial: Females are generally less territorial and can often be housed together, although this depends on individual temperaments.
- Nesting Behavior: Females might exhibit nesting behavior when gravid (carrying eggs), such as digging in substrate.
- Calm and Passive: Females tend to be calmer and less aggressive than males.
Health Considerations Based on Sex
Understanding the sex of your crested gecko can help you anticipate and manage health issues.
Health Issues in Males
- Hemipenal Prolapse: A condition where the hemipenes do not retract properly, which can require veterinary intervention.
- Impaction: Due to their robust build, males can be prone to impaction if they ingest substrate or large prey items.
Health Issues in Females
- Egg-Binding: A serious condition where a female is unable to lay her eggs, which can be life-threatening if not addressed promptly.
- Calcium Deficiency: Gravid females require extra calcium to support egg development, making supplementation crucial.
Tools and Techniques for Sexing Crested Geckos
Using the right tools and techniques can make the process of sexing your crested gecko more accurate.
Magnifying Glass or Loupe
A magnifying glass or jeweler’s loupe can help you see the pre-anal pores and hemipenal bulges more clearly, especially in younger or smaller geckos.
Digital Scale
Monitoring your gecko’s weight can help determine the right time to attempt sexing. As mentioned, waiting until they are around 20 grams increases accuracy.
Calm Handling
Handling your gecko calmly and gently is crucial when examining them for sexing. Stress can cause them to be more difficult to handle and may obscure physical features.
When to Consult a Veterinarian
If you are unsure about the sex of your crested gecko or if they exhibit any health issues, consulting a veterinarian with experience in reptiles is always a good idea.
Signs to Watch For
- Prolapse: Any signs of hemipenal or cloacal prolapse require immediate veterinary attention.
- Egg-Binding: Females that appear lethargic, refuse food, or exhibit signs of distress may be egg-bound and need professional help.
- Unusual Behavior: Any sudden changes in behavior or physical appearance should be evaluated by a vet.
Conclusion
Understanding the sexual dimorphism in crested geckos is essential for proper care, breeding, and ensuring the health and well-being of these charming reptiles.
By knowing the physical and behavioral differences between males and females, you can provide better care and make informed decisions about breeding and housing. Always remember to handle your geckos with care and consult a veterinarian if you have any concerns.
FAQs
. How can I tell if my crested gecko is male or female?
To determine the sex of your crested gecko, look for hemipenal bulges at the base of the tail, pre-anal pores, and spurs in males. Females will lack these features and have a smoother tail base.
. At what age can you accurately sex a crested gecko?
It is generally easier to sex a crested gecko once they reach a weight of around 20 grams, which usually occurs at six to eight months of age.
. Can two male crested geckos be housed together?
It is not recommended to house two male crested geckos together as they can be territorial and aggressive towards each other.
. What are the signs of egg-binding in female crested geckos?
Signs of egg-binding include lethargy, refusal to eat, and visible distress. If you suspect your gecko is egg-bound, seek veterinary assistance immediately.
. Do male crested geckos require different care than females?
While the basic care requirements are the same, males and females may have different needs based on their reproductive health. Females may require extra calcium when gravid, and males may need monitoring for hemipenal prolapse.
References
Ever watched a cow graze peacefully in a meadow and wondered, “Do cows have upper teeth?” The answer might surprise you! Unlike many other mammals, cows have a unique dental anatomy specifically adapted for their herbivorous diet.
Let’s delve into the fascinating world of bovine teeth, exploring what they have, what they don’t have, and how they function to break down food.
Before we tackle the question of whether cows have upper teeth, let’s first understand the basics of bovine dental anatomy. Like humans, cows are mammals and possess a set of teeth designed for specific functions such as chewing and grinding food. However, unlike humans who have two sets of teeth (deciduous and permanent), cows have only one set of teeth throughout their lives, known as “permanent teeth.”
Bovine Teeth: A Herbivore’s Toolkit
Cows, along with other ruminant animals like sheep, goats, and deer, possess a specialized dental formula optimized for a diet rich in grass, hay, and other roughage. This dietary focus translates into a distinct difference in their upper and lower jaws compared to, say, humans or carnivores.
Upper Jaw: The Dental Pad, Not Teeth
What’s Missing? Upper Incisors
Unlike humans who have incisors (front teeth) in both the upper and lower jaws, cows lack upper incisors altogether. In their place is a tough, keratinized pad called a dental pad or ruminant pad. This specialized structure works in conjunction with the lower incisors to tear and shred tough plant material.
Lower Jaw: Incisors for Grasping and Biting
The lower jaw of a cow houses a set of eight incisors – four on each side – arranged in a row at the front of the mouth. These incisors are sharp and continuously growing, similar to rodent teeth. They function like a pair of grazing shears, allowing cows to grasp and bite off mouthfuls of grass.
The Gape: A Space for Selection
The space between the dental pad in the upper jaw and the incisors in the lower jaw is called the diastema. This gap serves a crucial purpose. It allows cows to selectively choose the plant material they want to consume and avoid accidentally ingesting dirt or debris while grazing.
Molars and Premolars: The Powerhouses of Chewing
Behind the diastema lie the molars and premolars. Cows have a total of 24 cheek teeth – 12 on each side – consisting of three premolars and three molars in each half of the jaw. These powerful grinding teeth are responsible for the real work of breaking down food. Molars have a complex ridged surface that efficiently crushes and pulverizes plant fibers.
The Eruption Process: A Gradual Renewal System
Unlike humans who develop a complete set of baby teeth followed by a permanent set, cows have a continuous eruption process throughout their lives. Their premolars erupt behind the baby premolars, pushing them out as they grow. Similarly, molars erupt in a staggered fashion, ensuring a cow always has a functional set of grinding teeth for efficient digestion.
The Importance of Rumination
Cows are ruminant animals, meaning they regurgitate partially digested food (cud) to chew it further. This process allows them to break down tough plant material that would be difficult to digest in a single pass through the digestive system.
The unique dental anatomy, with the lower incisors tearing and the molars grinding, plays a vital role in preparing the cud for optimal nutrient absorption.
Dental Care for Bovines: A Preventative Approach
While cows don’t require the same level of dental care as humans, maintaining their oral health is crucial for their overall well-being. Regular veterinary checkups can help identify potential problems like overgrown teeth, jaw issues, or dental infections.
Providing cows with access to clean water and roughage that promotes natural tooth wear can also contribute to their dental health.
Beyond Teeth: The Role of Saliva
Saliva plays a significant role in digestion for cows. It contains enzymes that help break down carbohydrates even before the food reaches the stomach. Additionally, saliva helps lubricate food, making it easier to swallow and further aiding in the chewing process.
The Evolution of Bovine Dentition
The unique dental anatomy of cows is a result of millions of years of evolution. Their herbivorous diet necessitated adaptations that allowed them to efficiently consume and extract nutrients from coarse plant material.
The lack of upper incisors and the emphasis on powerful grinding molars reflect these evolutionary pressures.
Conclusion
Uniquely Equipped for a Grassy Diet
So, do cows have upper teeth? The answer is no, but they don’t need them! Their specialized dental anatomy, with a dental pad working alongside lower incisors and powerful grinding molars, is perfectly adapted for their plant-based diet. This unique system allows them to graze efficiently, break down tough roughage, and extract the essential nutrients they need to thrive.
Frequently Asked Questions (FAQs)
Do cows have upper teeth?
Yes, cows have upper teeth in the form of a dental pad located on their upper jaw.
What is the function of the dental pad in cows?
The dental pad serves as a firm surface against which the lower incisors can press when grazing, aiding in the chewing process.
How do cows chew without upper teeth?
Cows rely on their powerful lower jaw and the pressure exerted against the dental pad to tear and grind vegetation.
Are there any similarities between cow teeth and human teeth?
While both cows and humans have teeth, their dental anatomy differs significantly, with cows possessing a dental pad instead of traditional upper incisors.
Can cows experience dental problems?
Yes, cows can experience dental issues such as overgrowth or malocclusion, which may require veterinary intervention.
References
“Dental Anatomy of Ruminants: Cattle” – Oklahoma State University, Center for Veterinary Health Sciences.
“Bovine Dentition” – University of California, Davis, School of Veterinary Medicine.
“Dental Care for Cattle” – American Association of Bovine Practitioners.
Baby Donkey: Seven Facts and Adorable Pictures of Little Donkeys
When it comes to the animal kingdom, few creatures capture the heart as effortlessly as baby donkeys, also known as foals. These adorable, long-eared charmers have a way of stealing the show with their playful antics and endearing expressions.
Whether you’re a seasoned animal lover or new to the world of donkeys, there’s a lot to appreciate about these delightful creatures. In this comprehensive guide, we’ll explore seven fascinating facts about baby donkeys, illustrated with some of the cutest pictures you’ll ever see.
What is a Baby Donkey Called?
Baby donkeys are commonly referred to as foals. Just like horses, the term “foal” is used for young donkeys until they reach one year of age. Within this period, you might hear more specific terms based on their gender: a young male donkey is called a colt, while a young female donkey is called a filly.
The Birth and Early Life of a Baby Donkey
A baby donkey’s journey begins after a gestation period that lasts approximately 11 to 14 months, which is longer than the pregnancy period for humans. At birth, these foals are incredibly developed, able to stand and walk within just a few hours. This quick mobility is essential for their survival in the wild.
Early Development Milestones
- First Week: Within the first week, baby donkeys start to exhibit their playful nature, running and kicking up their heels in the safety of their herd.
- First Month: By the end of the first month, foals begin to explore solid foods, although they will continue to nurse for several months.
- Six Months: At around six months, foals are typically weaned from their mothers.
Unique Physical Characteristics of Baby Donkeys
Baby donkeys are born with several distinctive features that make them incredibly adorable and well-suited to their environment.
Large Ears and Big Eyes
One of the most striking characteristics of a baby donkey is its large ears, which are not just for show. These ears are highly functional, providing excellent hearing and helping to regulate body temperature. Additionally, their large, expressive eyes convey a sense of curiosity and innocence that endears them to people.
Soft, Fluffy Coat
A baby donkey’s coat is typically much softer and fluffier than that of an adult. This fluffy coat provides essential insulation to keep the foal warm and protected, especially in the cooler months.
Proportional Differences
Baby donkeys have shorter legs and a more compact body compared to their adult counterparts. This gives them a somewhat stocky and cuddly appearance, further enhancing their cuteness factor.
Behavior and Social Life
Donkeys are highly social animals, and baby donkeys are no exception. They rely heavily on their mothers and the rest of the herd for protection, learning, and companionship.
Playful Nature
Play is a critical part of a baby donkey’s development. Through play, foals learn essential skills such as running, jumping, and social interactions. These playful activities help them develop the physical and social skills needed for adulthood.
Bonding with the Herd
From an early age, baby donkeys form strong bonds with their herd members. This social structure provides a sense of security and helps them learn the hierarchy and behaviors necessary for survival.
The close-knit nature of donkey herds means that foals are rarely left alone, always under the watchful eyes of adults.
Diet and Nutrition
The diet of a baby donkey evolves significantly from birth through its first year of life. Initially, foals rely entirely on their mother’s milk for nutrition.
Milk and Nursing
For the first few months, a baby donkey’s diet consists exclusively of mother’s milk, which provides all the necessary nutrients for growth and development. Nursing also helps strengthen the bond between the mother and foal.
Introduction to Solid Foods
As foals grow, they gradually start to nibble on grass, hay, and other plant materials. By around six months, they are typically weaned off milk and fully transition to a solid diet that includes:
- Grass: Fresh grass is a primary component of a donkey’s diet, providing essential nutrients and fiber.
- Hay: In the absence of fresh grass, especially in winter, hay becomes a vital part of their diet.
- Grains and Supplements: Occasionally, grains and nutritional supplements are provided to ensure they receive a balanced diet, particularly in managed care settings.
Health and Care
Ensuring the health and well-being of a baby donkey requires attention to several key areas, including regular veterinary care, proper nutrition, and safe living conditions.
Vaccinations and Veterinary Care
Regular check-ups with a veterinarian are crucial to monitor the health of baby donkeys. Vaccinations protect them from common diseases, and deworming treatments help prevent parasitic infections.
Shelter and Living Conditions
Providing a safe and comfortable living environment is essential for the health of a baby donkey. Adequate shelter protects them from extreme weather conditions, while a clean and spacious area allows them to roam and play safely.
Social Interaction and Mental Stimulation
Just like humans, baby donkeys need mental stimulation and social interaction to thrive. Engaging with their herd and having access to toys or objects they can explore and interact with helps in their cognitive development.
Training and Human Interaction
Baby donkeys are intelligent and can be trained from a young age. Early training helps them become well-adjusted adults, comfortable around humans and responsive to commands.
Basic Training Techniques
- Positive Reinforcement: Using treats and praise to reward desired behaviors.
- Consistent Commands: Keeping commands simple and consistent to avoid confusion.
- Gentle Handling: Building trust through gentle and patient handling.
Building a Bond with Humans
Developing a bond with a baby donkey requires time and patience. Regular interaction, grooming, and gentle handling help build trust and create a positive relationship between the foal and its human caretakers.
Conclusion
Baby donkeys are not only incredibly cute but also fascinating creatures with unique characteristics and behaviors. From their playful nature to their strong social bonds, these little foals offer a lot to love and learn about.
Whether you’re considering adding a baby donkey to your family or simply enjoy admiring them from afar, understanding their needs and quirks can enhance your appreciation for these delightful animals.
FAQs About Baby Donkey
1. How long does a baby donkey stay with its mother?
A baby donkey typically stays with its mother for about six months before being weaned.
2. What do baby donkeys eat?
Initially, baby donkeys rely on their mother’s milk, gradually transitioning to grass, hay, and other plant materials.
3. Are baby donkeys friendly?
Yes, baby donkeys are generally friendly and can form strong bonds with humans and other animals.
4. How much does a baby donkey weigh at birth?
A baby donkey typically weighs between 19 to 30 pounds (9 to 14 kg) at birth.
5. Can baby donkeys be trained?
Yes, baby donkeys are intelligent and can be trained using positive reinforcement techniques.
6. What sounds do baby donkeys make?
Baby donkeys make a range of sounds, including brays, grunts, and snorts, to communicate with their herd and caregivers.
7. How can you tell if a baby donkey is healthy?
A healthy baby donkey is active, has a shiny coat, clear eyes, and exhibits normal eating and social behaviors.
References and Links
For further reading and verified sources about baby donkeys, please refer to the following resources:
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