ipl-logo

Galapagos Marine Iguana

1291 Words6 Pages

INTRODUCTION

In nature, there are many process that related to our ecology and genetic behaviour. It is important to learn and get a better understanding about the evolution process and how an organism react towards genetic stress. Biologists constantly assign to extrinsic situation, such as food and climate changes as the only potential cause of variation. Adaptation occur through changes in allele frequencies as a result of the selection pressure exerted by the environment. (R. Bijlsma, 2005). This process is known as genotypic adaptation or evolutionary adaptation. These phenomena are important from an evolutionary perspective.
The possible occurrence of evolutionary adaptation and the rate at which it can proceed depends on the presence …show more content…

Even though marine iguanas are efficient hunters, their short, profound battle of hunting action extra firmly features the activity style of sit-and-wait hunters. The general and environmental selective stress that are rare to this species and its environment has been examined to understand why these endemic lizards have adapted unique foraging strategy and how it differs from the general pattern of foraging in lizards.
Body size is one of the most crucial characteristics of organisms because basically all other characteristics or life history traits scale with body size (Peters, 1983) (Schmidt-Nielsen, 1984) (Reiss, 1989) (Perrin, 1998).That body size is an adaptation to the specific life history of an animal (P.H Harvey, 1999). Selection stress of both natural and sexual selection as well as to conclude according to what possible mediate control the body size in a structure of island reptiles, the marine iguanas of the Galapagos archipelago (Darwin, 1883), (Carpenter, …show more content…

They possess blunt heads with tricuspid teeth that are flattened laterally, enable them to graze on marine algae (Darwin, 1839). Besides, long and sharp claws with a powerful ability to grip onto the lava (Carpenter, 1966).Their tails are flattened compared with others iguanids and they successfully adapted for efficient swimming (Tracy and Christian, 1985).Black coloration and circulatory heat shunts help to maintain preferred body temperature during foraging bouts in the cold sea water.
Genetic stress in marine iguana occurs when there is endocrine-immune interactions across species which make it difficult to discern consistent patterns. Relationship between baseline and stress –induced levels of sex and adrenal steroid hormones and standard Eco immunological metrics in both female and male Galapagos marine iguanas. A significant association between adrenal activity and immunity is found, whereby greater corticosterone responses to stress had lower basal and stress-induced immunity for example bactericidal

Show More
Related

Hastings Point Lab Report

1610 Words | 7 Pages

70 common limpets were identified in the 40m bracket identified as the littoral zone, between 0m to 40m. The common limpet employs a range of adaptations to survive the abiotic and biotic conditions associated with the littoral zone. Firstly, the limpet uses a structural adaptation to overcome the harsh wave action in the tidal zone, by using their radula to grip on to imperfections in the rock. Furthermore, they employ a behavioural adaptation of grinding their shells down into the rock, to further ensure they are not swept away by the tide. Additionally, the limpet utilises a behavioural adaptation regarding its tough shell and powerful radula, to defend against predators.

Read More

Stickleback Fish Lab Report

606 Words | 3 Pages

Natural selection is the process by which evolution occurs where organisms that are better suited to the environment (‘fittest’) survive and pass on favorable traits to the offspring. Organisms must adapt to the environment in order to survive. The stickleback fish adapted to the environment by keeping/removing the pelvic structures. For example, in Frog Lake, the all of the sticklebacks had complete pelvic structures because the lake was connected to a system of streams that allowed predators into the lake. The sticklebacks in Bear Paw Lake had reduced or absent pelvic structures because little/no predators are present in the lake.

Read More

Himantura Leopard Lab

299 Words | 2 Pages

The experiment was done by observing the Himantura leopard and Dasyatis Americana interactions with a school of fishinside a 760,000 gallon tank at the Adventure Aquarium for 90 minutes. There were two Himantura leopard organisms and approximately five to six DasyatisAmericana. A school of fish was observed as three fishes that are approximately three inches away from each other. When either species of stingray came within five inches of the described school of fish, it was marked down if any of the fishes in the school separated from the school by swimming in an opposing direction of the other fishes of the school. If a fish separated from the school, it was marked down as “break apart” for the specie of stingray that caused the separation.

Read More

Northern Snakehead Research Paper

898 Words | 4 Pages

Channa Argus, commonly known as the northern snakehead, is one of the many invasive species around the world. This species is a top level predator and was introduced to several American states in 2002, but its natural habitat is based in southern and eastern Asia. Northern snakeheads were transported to the waters of America by being sold from pet stores and live food fish markets, followed by being released into the wild. The northern snakehead fish threatens and competes for the native species’ resources and habitat.

Read More

Skittlefish Lab Report

598 Words | 3 Pages

Natural Selection is the concept that organisms better adapted to their environment tend to survive and produce more offspring. This leads to the creation of populations and diversity of life within them. In the Skittlefish Lab, many separate occurrences can be observed which detail and explain how Natural Selection works on a population over a period of time. Certain adaptations in a species in its entirety may display how individuals impact the whole population as they pass their traits onto their offspring, which do the same. This lab required students to observe the individual “Skittlefish” and “Sea M&Ms” in different environments as they camouflaged and hid from predators.

Read More

Adaptions Of Gray Wolves

224 Words | 1 Pages

Adaptions are characteristics that living things have in response to its enviornment changing. All plants and animals have their own unique characteristics to defend and protect themselves from their enviornment around them. Organisms need to use their characteristics to find a way to reproduce, have a need for energy, protect themselves from predation, and from their own enviornment. Gray wolves have many special adaptions that help them to protect and live in their own enviornment. Gray wolves have a thick fur coat to protect themselves from their cold enviornment in the snow and their log guard hairs to keep them out of moisture.

Read More

Primate Observation Report

429 Words | 2 Pages

The Earth's climate went through several major changes throughout the Tertiary period that led to the flourishing of primate species and the extinction of other primate species. The plesiadaptiforms, which are not considered real primates because of the lack of key primate features, went extinct at the end of the Paleocene epoch. At the beginning of the Eocene epoch came the euprimates, considered the first real primates, whose features made them well-adapted to arboreal life. Euprimates had convergent eye orbits, opposable digits, nails, and larger brains than plesiadaptiforms. This coincides with a period of global warming which made for a more tropical and forested habitat.

Read More

Loggerhead Sea Turtles

644 Words | 3 Pages

The probability of this is uncertain, as there is a possibility that loggerhead turtles will select different nest sites as warming increases, or rapidly adapt to the changed climate (Deeming and Ferguson 1989). However, a shift in nest site preference is not the most likely option for loggerhead sea turtles, which show strong nest site fidelity. In addition, because nesting females generally return to their natal beaches and there is a low gene flow between nesting assemblages, these populations that are genetically distinct are at risk for extirpation (Ehrhart et al. 2003). Additionally, the potential for loggerheads to choose suitable nest sites is limited by human activity.

Read More

Nonhuman Primate Evolution

310 Words | 2 Pages

As seen by looking at the geologic time scale it is clear that different environments allow for different evolution to occur. The three theories

Read More

Frilled Lizard Lab Report

520 Words | 3 Pages

1. The morphological feature is the body size of a reptile Chlamydosaurus kingii also known as the frilled lizard. This is from the class Reptilia, order Squamata, family Agamidae and subfamily Amphibolurinae. The morphological trait is the body size used during bipedal motion as a secondary prey defense strategy.

Read More

Predator-Prey Lab Report

1347 Words | 6 Pages

Organisms can evolve to enhance their ability to catch prey, or flee predators. Coevolution occurs in a predator-prey relationship when the prey evolves in response to pressures exerted by its predator. The predator then evolves in response to the changes in the prey (or vice versa). Inheritable adaptive traits evolve through natural selection, the process by which organisms that have developed favorable traits are capable of surviving and reproducing at greater rates, thus passing their adaptive traits to their offspring. Birds and caterpillars have a predator-prey

Read More

The Puerto Rican Frog

1008 Words | 5 Pages

The Puerto Rican frog is a fascinating species with an interesting ecology, anatomy, life cycle, behavior, evolution and

Read More

Dottus Predation Lab Report

1059 Words | 5 Pages

The starting population in the experiment contained 100 organisms of Dottus Variengatus. The results of both parts of the experiment rejected the null hypothesis tested. The Dottus variegatus individuals experienced negative selection effects by predators based on their bright and distinctive phenotypes that made them stand out among the rest of the population. Individuals with lighter colors represented the adapted individuals which experienced positive selection pressure. These individuals were benefited by predation because they survived and could continue to pass their alleles and contribute to the gene pool of the future population.

Read More

Were Genetic Changes Random Back Then?

469 Words | 2 Pages

They change their DNA to adapt more to their environment to survive. This is called Natural Selection. First of all, they need to change their DNA in order to adapt to their environment. Second, they need to adapt to survive. Finally, they adapt to produce more offspring.

Read More

Creationism Vs Natural Selection Essay

540 Words | 3 Pages

Evolution is one of the best corroborated theories throughout the history of science. This theory has been supported by evidence ranging from a vast variety of scientific disciplines, including geology, genetics, paleontology and developmental biology to name a few. This theory focuses on the principle that every single life on planet earth is interconnected with each other. it also argues that different forms of life are influenced by modifications and what they call, “ natural selection”. Natural selection causes organisms to change depending on their environment and their exposure.

Read More

More about Galapagos Marine Iguana

Related Topics

Open Document