Clownfish Essay

Crawfish are delicious crustaceans that closely resemble lobsters. Many people consider crawfish to be as delicious as lobsters, which is why these crustaceans are harvested all over the world. In the U.S., crawfish are closely associated with the haute cuisine and culture of Louisiana. In fact, crawfish are the official crustacean of the state. I normally prefer to harvest or purchase crawfish on the day I intend to cook them. However, many people prefer to purchase and eat them later but do not know how to keep crawfish alive in a sack or container for several days before finally preparing and eating them. Fortunately, I will provide you with some tips on how I keep my crawfish fresh and healthy

Blackfish was released on the 19th of July 2013 in New York. Gabriela Cowperthwaite’s award-winning documentary is about a captive killer whale that has taken the lives of several people. This documentary explores the different stories of Tilikum’s attacks and the reasons for why these accidents are occurring in the sea park industry.

To understand how this pattern happens, scientists take a look at embryos. Sometimes they interfere with the development to see what occurs when things go wrong. Scientists use chicken eggs to study this. Just by adding a dab of vitamin A on a chicken embryo, you will get a mirror image of the embryo. The patch of tissue is called ZPA.

The gonads are the male and female reproductive organs, the testes (males) and ovaries (females). The testes and ovaries produce androgens (testosterone) and estrogens, these hormones affect aggressiveness, mood, and sexual interest and behavior. Higher levels of these hormones have been shown to promote aggressiveness in both sexes (Morris and Maisto, 2002).

The addition of frozen and then thawed out homogenized G.semen biomass from all lakes (“H” treatments) considerably influenced daphnids body length measured after 72 h exposure (Fig. 3). At increasing homogenate concentrations (chl-a: 84 – 1530 mg m-3) body length of Daphnia was always significantly higher as compared with filtered water controls (P<0.01, Fig. 4a).

Throughout decades, sexual selection has been acknowledged in the explanation of evolutionary patterns. With research, we have had the opportunity to study species of animals like the Syngnathidae family. Animals that are included in this category include pipefish, seahorses, and sea dragons. This species is known for their sex role reversal, meaning that the male fertilizes and carries the eggs during incubation after the female has laid them. When we look more specifically at the pipefish, it is found that males are left with most of the parenting and care for the offspring. As the male carries its eggs, it supplies them with nutrients and oxygen through the placenta. During pipefish copulation, the female transfers her eggs through a small

The purpose of this experiment is to perform a procedure known as SDS-PAGE (sodium dodecyl sulfate - polyacrylamide gel electrophoresis) in order to determine protein profiles for seven fish species: Yellow Tuna (Thunnus albacares), Thresher Shark (Alopias vulpinus), Paiche (Arapaima gigas), Swordfish (Xiphias gladius), Catfish (Ameiurus catus), Coho Salmon (Oncorhynchus kisutch), and Rainbow Trout (Oncorhynchus mykiss). The gel electrophoresis separates the fish muscle proteins according to their molecular weights, which allows one to determine a profile for each specie.

　　The responses of channel catfish (Ictalurus Punctatus) toward prey extracts among the five groups tested in a Y-maze shown in Figure 1. There was a significant in response to crayfish extract (Z = 3.33, P 0.05, n = 15). Unlike Sculpin extract, response scores of channel catfish with plugged nares (OlfPlug) toward crayfish extract were significantly lower than the control, BarbX, BarbSh and OlfSh (figure 1a). There was also a similer response time among the fish that went through the procedure but didnot receive the cuts of the plugs (BarbSh and OlfSh).

In the laboratory exercise, two species of Gambusia (Gambusia speciosa and Gambusia krumholzi) were used in order to compare the fecundities of both species. It is proposed that, just like other vertebrates, there is a relationship between the sizes of a female their pregnancy status. Smaller fish would most likely be prepubescent and not able to reproduce. Larger females could have most likely gone through menopause and also not able to reproduce. Therefore, it is highly likely there are higher averages of pregnant fish at average sizes.

Between sexes oxytocin and vasopressin has shown a dimorphic representation. In females, oxytocin is involved in social-sexual behaviours, sexual intercourse, childbirth, lactation maternal attachment and pair bonding (Stoop, 2012). In contrast, vasopressin is identified in male reproduction including erections and ejaculation. Vasopressin occurred in typical male behaviours such as territorial possession, aggression, and bonding and identified across species including humans, rabbits and rats.

For instance, female hormones in the pill contribute to feminization as male wild fish and low concentration of anti-anxiety drugs have affected the behaviour of carp(fish) making them less social and eat faster which makes them vulnerable to predators. Similarly the article by AP, “Intersex Fish Are Found at High Rate in a Region” had a similar statement about the intersex fish and the effects of chemicals in the Potomac river. While Vicki Blazer, a fish pathologist in NY Times could not find such similar results when compared with AP and Harvard Medical School, he stated “that researchers were still waiting on data that would help them determine the water quality at the time the fish were caught, but that preliminary data from the Potomac found a variety of chemical pollutants.” He explains to his audience that the fish were affected however from his statements, it seems as they did not examine the water when the researcher caught the fish, therefore he is still not confident to state that the fish were affected because of the

We all have some part of our lives that none of our friends or family can relate to. Pipefish helps make money by helping e-commerce companies do a better job of recommending products.Pipe fish can reach a standard of eight inches. They adjust well to aquarium life if conserved in water conditions with low modern and plenty of branching gorgonians’, algae, or coral decorations. Pipefish are generally very cryptic (means that they’re good at camouflaging themselves). It’s very important that they have sea grass that they can hide in. (Pipefish Natural History) Interesting thing about the sexual selection in pipefish is that in a lot of pipefish the female are the ones that compete for mates. This situation is the reverse of what happens in most species, where males are usually the ones competing. (Pipefish Mating Habits). (Habitat: Reef, Lagoon, Sea grass, Estuary, River.), (Diet: Mysis shrimp, plankton, small crustaceans, insects, worms and fish.), (Size: 1 inch to 26inches.), (Species: 200+ species, part of the Syngnathidae family that seahorses belong.) Pipefishes or pipe-fishes are a subfamily of small fishes, which, together with the

Amazingly, throughout evolutionary history, both neuropeptides and steroid hormones were able to preserve their molecular structure, and their effect on cross-species sexuality. An estimated 450 million years ago, the neurotransmitter oxytocin (OT) and vasopressin (AVT) were present in the earliest phyla, and their varied functions are similar in both animals and humans. Much like OT and AVP, the steroid hormones, testosterone (T) and estradiol (E) play a significant role in

As you know, various types of gender change are found among parrotfish, clownfish, and basslets. Do you think that one of these tactics is more successful than the other? Why or why

Zebrafish is native to the southeastern Himalayan region (Burma, Nepal, India) and has its origin from the river Ganges in India. In most fish, growth (hypertrophy & hyperplasia) continues throughout life making them an important model for understanding the hormonal regulation of growth (Mommsen 2001). Zebrafish are useful in studies on the endocrinologic aspect of fish. The overall control of growth begins in the brain, although local factors in each tissues are also important. Growth hormone-releasing hormone (GNRH) is synthesized in nerve cells in the brain of Zebrafish as in other vertebrates. After secretion, GHRH binds its receptor on the surface of somtotroph cells in the anterior pituitary to release growth hormone(GH), which in