Endangered Eel Essay

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Endangered eel: Anguilla Japonica Anguilla Japonica, most commonly known as the Japanese eel is classified as an endangered species whose habitat surrounds the coasts of Japan. Based on various credited sources, an analysis was performed in order to determine the likelihood of this eel to go extinct. Biological components and statistical data were taken into account and based on the observed results, it is logical to hypothesize that within a span of years this eel can go extinct. Nonetheless, various conservation strategies can be put into practice with the goal of saving this endangered species.
In order to understand the reasons as to why this specie is endangered, it is necessary to first know about its physical appearance
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It prefers subtropical weathers with a water temperature of 4°C - 27°C. (Jacoby D) This species is catadromous and it was recorded spending its lifetime in freshwater, but it migrates to other places to spawn. (A. Tsukamoto) Freshwater eels exhibit inter-habit migration and it has a clear spawning ecology along the region of the Mariana Ridge. (Kimura and Tsukamoto) This eel has a complex maturing cycle. The eel develops from a preleptocephalus (hatched larva) to a leptocephalus (leaf like eel). (Tanaka H.) A japonica can adapt to its environment in terms of the food it consumes. Eels found on fresh water consume smaller fish and bugs whereas eels on open spots of the ocean consume crustacean organisms. (Tanaka H). Despite having a well-suited environment and the adapted phenotypes, A. japonica faces threats that limit its population size and genetic diversity. Global …show more content…
In the case of A. japonica, the major effect involves the temperature of the water where it habits. The changes in water temperature cause this eel to migrate on a different route and be more exposed to fishery pressures. (P Tatzukawa) Based on this observation, there are many possible outcomes that can cause extinction. For instance, some eels may not return to their original spot because of changes in the water temperature and current hence, gradually they can become a different species. Also, scientists have found that most of these eels’ specie is composed of females. (Han Tzeng) Female eels demonstrated a higher lipid content required for swimming that a vast majority of males lacked. (Limburg A) Based on this information, we can make the connections as to another biological explanation that hinders the eel population. Since the population is mostly composed of females, then the same phenotypic variants would be passed on to other generations. That is, the lipid composition that allows females to survive at a higher rate is absence on the males, hereafter they can’t reproduce. (Limburg. A) If a population is mostly females, then the changes of

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