biology

Pugmark

Pugmark is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Pugmark rather than just read about it. In short: A pugmark is an animal track, a footprint, left by a wild animal. The distinctive pugmark of an individual species is useful for identification. "Pug" means foot in Hindi (Sanskrit पद् "pad"; Greek πούς "poús").

Key takeaways

Pugmark belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Pugmark to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Pugmark from memory before moving on to harder problems.

Reference excerpt

A pugmark is an animal track, a footprint, left by a wild animal. The distinctive pugmark of an individual species is useful for identification. "Pug" means foot in Hindi (Sanskrit पद् "pad"; Greek πούς "poús").

Pugmark tracking is a technique used by wildlife conservationists to identify the distribution of species. For some species, such as tigers, pugmark tracking is now considered to be an unreliable method of determining an area's total animal population, leading to the rise in the use of alternative techniques to count populations, such as photographic capture.

Field data collection Indian forester Saroj Raj Choudhury developed the technique of the ‘pugmark census’ in 1966 to track tigers. It involves collecting pugmark tracings and plaster casts from the field and analyzing these to determine the number, track dimensions and spatial distribution of key species.

Technique In order to obtain good pug impressions, PIPs (pug impression pads) are laid along roads, animal tracks and footpaths. Field data for each pugmark are then collected in specially devised census forms. The plaster casts and tracings along with field information are together analysed with map of the area to remove repetitions and overlaps in pug-evidences collected for the same tiger.

The final result claimed to indicate the (a) total numbers of male, female and cub of tiger and leopard, (b) their pugmark dimensions with stride where available, (c) the names of locations where the pugmarks of each tiger have been traced to show the gross movement areas (d) interrelationship among different tigers by linking each male to female and the latter to cubs tracked in the movement area, and finally (e) spatial distribution map. The technique was used for over three decades in India, until the 1990s when it was found to be an inaccurate way to measuring tiger populations.

Benefits as a data collection method

The above approach to pugmark tracking has been developed and was refined over three decades since it was first implemented in the year 1972 at the All India Level. Compared to any other method of data collection on a population of large carnivores, ‘Pugmark tracking’ is considered quick, involving about 10 days of ground preparation, 6 days of rigorous data collection, and about two to four weeks of data analysis. It is very cost-effective or economic, and all money spent in the process goes to local tribal people who act as assistants as they possess the skill to track animals in Indian jungles. It results in data which shows which forest beat possess how many, of what sex/age and which type of large carnivore. This brings a sense of responsibility among the guards, as none of the animals is ‘virtually’ generated through statistical interpretations. Like any study technique, Pugmark tracking also calls for sincerity for true reflection of structure and spatial distribution of the population of large carnivores.

See also Animal track Spoor Singh, L. A. K. (2000): Tracking Tigers: Guidelines for Estimating Wild Tiger Population Using the Pugmark Technique. (Revised Edition). WWF Tiger Conservation Programme, New Delhi.

References

External links

Pugmark-based Population Monitoring Protocol for the Tiger & other Large Felids Strengthening The Monitoring System for Tigers Comments on Monitoring Tiger Status and Habita WWF-India's National Nature Camping Programme - Corbett Report WWF Bhutan story How many tigers are there in Ranthambore National Park? Colour photo of a pugmark Scale of a pugmark Improved approach to tiger counting through pugmarks [1]

Illustrations

Pugmark: An image of a thylacine pugmark — An image of a thylacine pugmark

Worked examples

Example 1 — a first encounter with Pugmark

Start with the simplest possible case. Write down what Pugmark claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Pugmark before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Pugmark ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Pugmark

In research: Pugmark appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Pugmark in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Pugmark is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anatomical terminology, Ethology, Field research, so understanding it makes those chapters shorter.
In everyday life: Look for Pugmark outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Pugmark in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pugmark means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Pugmark out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pugmark in simple terms?

Why does Pugmark matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Pugmark?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Pugmark.