High Feeding Costs Limit Dive Time Essay

Despite their massive appearance, the largest whales (and also the largest predators) have shorter honkytonk fourth dimension compared to other smaller fishes. Our hypothesis is that lunge-feeding (the whales feeding behavior), is energetically expensive resulting to unfitness to descend at lower depths and at longer time intervals. This contain is aimed at determining how and why the largest whales exhibit shorter honkytonks by examining how lunge-feeding affects their behavior and dive duration. MethodsIn order to determine how and why the largest whales exhibit shorter dive time compared to other fishes, we have to study how its lunge-feeding behavior affects whales overall behavior and their dive time deposit. In gathering data, we used remote sensing techniques. In this experiment, we used the TDR time/depth recorders technique since it is the most applic fit regularity considering that the subjects were not in a controlled environment. The TDRs actually recorded the oxy gen take aim of each tagged whale. After some time, the TDRs were collected and the results were analyzed by dint of specialized software that translates the data from the TDRs.Results showed that the whales campaign faster when at the advance (or climbing) portion of the dive while it showed that whales move significantly slower during descent. seey time played out at the surface was also viewed as an all-important(prenominal) factor in determining the effect of lunge-feeding. Our tests showed that there is a correlation between the lean of lunges and the time spent recovering at the surface. Finally, victimization optimality role models, we were able to compare the results of the actual study to the predicted outcome.The result was a common land cost for lunge dives which indicated the spunky energy cost during lunge dives resulting to shorter dive duration. Results and Discussion Results of this experiment showed that there is a relationship between the number of lung es and the surface recovery intervals. The TDR analysis showed that whales move faster during ascent and move significantly slower when at descent. This indicated that lunge-feeding is energetically expensive. We were able to measure the high energy cost of lunge-feeding using the remote sensing technique.Whales usually recover at the surface after each dive and the length of tour of duty at the surface is relative to the number of lunges it makes during the dive. The to a greater extent lunges the whales make during feeding, the more time it spent at the surface for recovery. The optimality models showed the relative differences between the lunging-costly model versus the no-cost model. In the lunging-costly model, observed forage depths, vertical speed, number of lunges, time spent recovering at the surface, are some of the variables that were examined to provide an outright solution. evidenceBased on the results of this experiment, it has been found out that lunge-feeding in la rge whales is an energetically expensive activity. Using the TDR technique to record the energy cost of lunge, we were able to deduce that the more lunges a whale makes, the more time it spends recovering at the surface, usually regaining oxygen levels. Therefore, the high energy requirements of lunge-feeding limit the dive time and depth of dive in large whales. speech Acevedo-Gutierrez, A. , Croll, D. A. , and Tershy, B. R. (2002). High Feeding Costs Limit Dive Time in the Largest Whales. The Journal of Experimental Biology, 205, 1747-1753.