Frilled Anemone Essay

The nine specimens were placed into a watch-glass container and checked to ensure that they were of relatively equal sizes to one another. The pipette was then utilized to collect one Daphnia magna and placed onto a depression slide to create a wet mount. It is noted that a coverslip was not to be placed on the top of the slide.

Habitat: Commonly found in terrestrial. Forest light gaps, slips, margins, disturbed sites, open habitats, riverbeds, cliffs, inshore and offshore islands, fernland, herbfield,

Table 2: Presence and occurrence of marine organisms in the surf zone of Pallarenda beach.

Daphnia usually eat algae and other small bacteria. They are filter feeders which allow them to eat because they are eating the bacteria that is found in the water as they filter it.

Temperature had a direct effect on oxygen consumption of crayfish, Orconectes propinquus. Crayfish acclimated to warm temperature (20 to 25 C) had a mean mass of 8.25g +/- 1.05. Crayfish acclimated to cold temperature (3 to 5 C) had a mean mass of 10.61g +/- 0.77. Oxygen consumption rates of 30-60 minute treatments were used and there was no significant difference between the two different treatments (t=0.48, df=58, P=0.70). The data from 0-30 minutes were not used because the crayfish were disrupted by transportation and the data were not normally distributed. The Q10 value was 1.05, representing that there was full compensation for oxygen consumption for the crayfish at two different acclimated temperatures. The oxygen consumption of crayfish was not affected significantly by two different temperatures (Figure 1).

There are twelve species within the same genus and have subtle variations in physical appearances, all living in freshwater, but due

Only one method of planktonic sampling was used so comparison with another method of sampling cannot be done. It is safe to assume that the most appropriate method of sampling in these areas was previously determined by the lab instructor. Isolation of organisms in the samples was met with some difficulty as there was very little life to be observed. Once isolated however, a general identification was simple with the use of the “quick picks” section of the Marine Invertebrate Zoology Lab Manual. One particular organism isolated from the “T-docks” samples, a foraminiferida, was chosen for scientific drawing (Figure 1).

Adaptive radiation of different organisms have occurred throughout geological time through the filling of ecological niches. Organisms different from one another are capable of radiating greatly, as they evolve traits that allow them to thrive better in their environment. The Anolis lizards of the Caribbean islands are a great example of a single genus to have radiated not once, but multiple times through very similar mechanisms. Different populations of the Anolis phenotypically vary in their morphological traits to facilitate adaptation to particular niches. These phenotypic variations have evolved in convergence in more than one occasion, as recently discovered fossil specimens show similar patterns in morphology to modern Anolis.

Sea Lampreys (Petromyzon marinus) are an invasive species of lamprey that, while native to marine environments, have moved into the freshwater great lakes. Sea lampreys first entered the great lakes through canals, which were revolutionary means of transportation at the times. There were multiple canals, connecting the Atlantic Ocean to the great lakes. The lampreys were previously impeded by Niagara falls. Now with the canals connecting both bodies of water, there was no longer an obstacle.

Diet: small marine animals such as copepods, crab larvae and tiny fish fry. Its tentacles kill prey with their sting and then move the food to its mouth, which is on the underside of its disc.

The Pacific Lamprey (Entosphenus tridentatus) is an anadromous species that is found along the west coast of North America, primarily along the coast of Washington, Oregon, and northern California. E. tridentatus is a semelparous species that can live up to five years and can spend up to three and a half years in saltwater. They begin metamorphosis in July and the known period of entry into salt water is from December until June. In the ocean E. tridentatus have been documented to primarily feed on Pacific Salmon species such as Chinook (Oncorhynchus tshawytscha), Coho (Oncorhynchus kisutch), Sockeye (Oncorhynchus nerka), and Pink (Oncorhynchus gorbuscha). O. tshawytscha have endured most lamprey attacks because researchers believe that E. tridentatus attack this salmon when it is making the transition to swim back up stream to spawn. E. tridentatus who do not represent an anadromous life style also prey heavily on resident salmonid species. Salmonid species have an important role in the diet and life history of E. tridentatus as they are an important prey item.

For millennia, terrestrial plant matter, seeds, and driftwood have travelled across the open oceans with the help of surface currents. Even floating islands, also known as tussocks, floatons, or sudds are common in many Florida lakes and across the world (Mallison, C.T., 2001). These islands have been known to carry exotic plants and vertebrate animals. Floating islands promote trans-ocean dispersal of marine and terrestrial organisms. This increases biodiversity and helps new barren islands thrive. However, in the last five decades, with the growing number of plastics in the marine environment, the dispersal and occurrence of these organisms has increased exceedingly (Gregory, R.M., 2009). This paves the way for invasions by alien and even aggressive invasive species to establish themselves in new ecosystems beyond their native range. A survey done in 2009 reported that over 150 marine species have established themselves due to marine debris stranded on the shores of northern New Zealand. Most of these organisms were identified as crustaceans. Four of those organisms discovered are featured in figure 3. Specimen A shows various crustaceans on unknown plastic, specimen B depicts warm water Indo-Pacific oysters growing on nylon rope, specimen C depicts crustaceans growing on a plastic pellet, and specimen D depicts a bryozoan colony attached

Didemnum vexillum colonies alter marine habitats and threaten to interfere with fishing, aquaculture, and other coastal and offshore activities. The colonies can grow on hard substrates that include dock structures and floats, wood and metal pilings, moorings and ropes, steel chain, automobile tires, polythene plastic, rocky outcrops, gravel seabed (pebbles, cobbles, boulders), and ship hulls. They overgrow organisms such as tunicates, sponges, macroalgae, hydroids, anemones, bryozoans, scallops, mussels, and oysters. Where these colonies occur on the seabed, they likely cover the siphons of infaunal bivalves and serve as a barrier between demersal fish and benthic prey. Colonies have been found at water depths ranging from intertidal to continental

One of the organisms I have chosen, the Red Waratah anemone (Actinia tenebrosa) was found in the mid tide zone and the low tide zone. This anemone is the main prey of the predator Grey side-gilled sea slug, which is the other organism I have chosen,

Denley, you made several valid points. However, I would not place the burden of indifference solely upon employees of government entities alone, as many organizations struggle with this sentiment. I have found myself feeling indifferent even at times when I haven’t had a truly valid justification. People in positions of power are ultimately responsible for facilitating positive rapport amongst those working within the organization, if that isn’t occurring, feelings of apathy are inevitable.