Ram ventilation, Biology

Assignment Help:

Ram Ventilation

Some fish do not use pumping action for gill ventilation. It has been known for long that large tunas cannot be kept alive in captivity unless they are put in circular tanks where they can swim continuously. The fish swim with their mouths partly open and there are no visible breathing movements. Water flows continuously over their gills. This is known as ram ventilation.

It is now known that many fish breathe by pumping at low speed and change to ram ventilation at high speed. In this case the work of breathing is transferred from the muscles of the opercular pump to the muscles of the body and tail. However, ram ventilation is more economical as far as energy consumption is concerned than opercular pumps at high rates required for fast swimming.


Related Discussions:- Ram ventilation

Precautions for detection of number of bacteria in milk, Explain the Precau...

Explain the Precautions for Detection of Number of Bacteria in Milk? 1. Make a thin film of milk on the slide. 2. Do not over stain with methylene blue.  If over staining ha

What do biomass pyramids represent, What do biomass pyramids represent? ...

What do biomass pyramids represent? The Biomass pyramids represent the sum of the masses of the individuals that participate in each trophic level of a food chain.

Sepsis, Dietary management of sepsis without MODS

Dietary management of sepsis without MODS

Cow-pox (vaccinia), C o w - po x (vaccinia) E p ide...

C o w - po x (vaccinia) E p idemiology: This infection, although mostly occurring in cows, sometimes also occurs in buffaloes. Under natural conditions, t

Explain sol -gel transformation, Explain sol -gel transformation During...

Explain sol -gel transformation During sol -gel transformation, a three dimensional network is formed by the interlocking of dispersed particles. The liquid phase is entrapped

Why all specialization occurred during this time period, There is a lot of ...

There is a lot of dataset and hypothese that attempt to explain why there was a Cambrian Explosion. Using all supporting ideas, explain and write a paragraph on why all this specia

Accidents in industry workplace, Accidents in Industry Workplace It is...

Accidents in Industry Workplace It is a hard fact to bear in mind that accidents in industry workplace are to be avoided or discarded and efforts in this direction has been in

Limitations of doppler echocardiograph, Though  it has bees suggested that ...

Though  it has bees suggested that Doppler echocardiography may be useful for non-invasive determinations of  stroke volume and cardiac output, it  should be recognized that th4re

Ruminal tympany (bloat), R uminal tympany (Bloat) It is the over-diste...

R uminal tympany (Bloat) It is the over-distension of the rumen with gases which may be either frothy or free gas. The disease is characterized by change in silhouette of the

What is polyembryony, Q. What is polyembryony? Polyembryony is the phen...

Q. What is polyembryony? Polyembryony is the phenomenon in which a single embryo in its initial embryonic stage divides itself forming many new individuals of genetically ident

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd