Lobsters are osmoregulators

The two lobsters in the low salinity tank had the lowest osmolarity 0. The amount of salt in the water affects its density; therefore the hydrometer gave an accurate reading of salinity. Then the lobster was picked up with a firm grim around the dorsal celphao-thorax region and flipped over to expose the ventral side.

The water was also tested for the amounts of ammonium within the three tanks. The serum from the microcentrifuged hemolymph was taken back to the General Physiology Lab in Duffy and placed into osmometer, which measures the osmolarity. This frog is unique since it can survive in diverse saline environments.

Therefore this experiment was to determine that lobsters in various salinities will osmoconform to their environment. Although osmoconformers have an internal environment that is isosmotic Lobsters are osmoregulators their surrounding environment, there is a huge difference in the composition of ions in the two environments so that it allow the critical biological functions to take place.

When the needle was injected into the membrane, it did not have to go any deeper than mm into the hemocyannin blood cavity.

This animal regulates the amount of urea it excretes and retains to create a diffusion gradient for the absorption of water. The other instrument is called hydrometer that measures the specific gravity of salinity in water. The needle size was 20 gauge, because anything smaller would destroy the hemolymph cells.


Sharks adjust their internal osmolarity according to the osmolarity of the sea water surrounding them. The syringe size was 1 ml, and the intention is to collect between 0.

The results substantiated the hypothesis, Lobsters are osmoregulators that, lobsters internal osmoles fluctuate with the salinity of the external environment. The first step of the lab is to prepare the needle and syringe that will be taking the hemolymph.

By Benjamin Elisha Sawe. Osmoregulators rely on excretory organs to maintain water balance in their bodies. The word stenohaline is broken down into steno to mean narrow and haline which translates to salt. Nevertheless, there is minimal use of energy in ion transport to ensure there is the correct type of ions in the right location.

The salinity of the tanks was determined by two different instruments. Sharks concentrate urea in their body, and since urea denatures proteins at high concentrations, they also accumulate trimethylamine N-oxide TMAO to counter the effect.

This is due to the high concentration of urea kept inside their bodies. If the needle went to deep it would strike nerves of the lobster. These organisms are further classified as either stenohaline such as echinoderms or euryhaline such as mussels. This factor enables important biological processes to occur in their bodies.

The hemolymph was spun for three minutes in a microcentrifuge and the serum was then tested on an osmometer, which determined the osmolarity of the hemolymph. The ammonium analysis began with a water sample from each tank. The first step of the lab is to prepare the needle and syringe that will be taking the hemolymph.

Characteristics Of Osmoconformers Osmoconformers are well adapted to seawater environments and cannot tolerate freshwater habitats. The last step was adding 1 ml of Nesslers Reagent, which had to be inverted before being placed in the spectrophotometer, which had a digital screen that produced the ammonium value.Crab and lobster fishing is a commercially important business and caters to the ever increasing demand for crabs and lobsters from the food industry all over the world.

Prices of crabs vary depending on the type and size of crab. Alternatively, the greater physiological tolerance of male lobsters to high temperatures and low salinities (Jury et al.

a Jury et al., b) may result in malebiased lobster dispersal in estuaries and bays (Munro and Therriault ; Howell et. A Laboratory Exercise In Osmoregulation By Bonnie Leksrisawat, Ann S.

Cooper and Robin L. Cooper Humans are osmoregulators as they internally monitor and regulate weight for a blue crab or a lobster is hemolymph (Gleeson and Zubkoff, ; Guirguis.

Lobsters Are Osmoregulators Essay. Methods To determine the principals of osmoregulation, we sampled two lobsters from each tank and there were three different tanks which the water ranged in salinity.

Thus, at salinities below 15 ppt it appears as though male lobsters are more efficient osmoregulators than female lobsters. 4. Discussion Lobsters and other estuarine invertebrates encounter large seasonal drops in salin- ity.

What Is An Osmoconformer? The opposite of osmoconformer is osmoregulator, where most animals fall under as well as human beings. Osmoregulators rely on excretory organs to maintain water balance in their bodies.

jellyfish, scallops, marine crabs, ascidians, and lobsters are examples of osmoconformers.

What is an Osmoconformer?

These organisms are .

Lobsters are osmoregulators
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