Evidence 1 Life Science 4 Semester PDF

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Evidence 1 of the course life science in 4 semester at the universidad tecmilenio...

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Evidence 1: Life science The yeti crab

By: José Eduardo Carbajal Nava 2921161 Tecaher: Isabel Uribe Bujanda

Febraury 25th, 2021

YETI CRAB

This crab (Kiwa tyleri) was first observed in March 2005 by marine biologists using the research submarine. Discovered during the Easter Microplate expedition to the southeast Pacific. Most of the crabs were living at depths of about 2,200 meters on recent lava flows and areas where warm wáter was seeping out of the sea floor.

Types of Metabolism: It is part autotroph and heterotroph specie. They eat seep bacteria. Uses chemical energy from the seafloor. Experts think crabs let

the bacteria grow in their hairs and then eat them. So Yeti Crab farms their own food by growing the bacteria and then harvesting them when theyré ready toe at. Scientist have also seen the animals feeding on mussels from the seafloor. Diet, bacteria, mussels.

Adaptation Stage: It is a crab with no eyes. Are unique because of their relationship with epibiotic bacteria, which cover most of their appendages including chelipeds and walking legs. Most of the crabs were living at depths of about 2,200 meters on recent lava flows and areas where warm water was seeping out of the sea floor, due to its way of living they are virtually blind.

Stage of Growth and Reproduction: Majority of the females possess ripe ovaries suggesting they are receptive to the sexual inquires of the males.

Their size is 15 cm and weight between 2 to 5 pounds. Their lifespan is between 10 to 20 years, their colors are pale White, grey and yellow Type of Irritability and Geographical Space: There are a total of four known species that exist in four different marine locations, The Pacific Antartic Ridge, The East Pacific, The East Scotia Ridge and The Australian-Antartic Ridge. Two similar species are known to exist in the vents on the South West Indian Ridge and the Galapagos.

PREDATORS

YETI CRAB

CRAB DIET

The crabs reproduce by reasing many larvae into the water so that a handful reach other vents and colonise them. They existence is vulnerable, Oxford presents an analysis which indicates that they may be at serious risk. The research indicates that the species have been significantly influenced by past environmental changes, this in turn suggests that the animals may gain be very vulnerable to such outside change. This is the kind of change wrought by a warming climate, and by habitat destruction and resource exploitation by humans. Most yeti crabs inhabit extreme hábitats; this might point to an ability to adapt, but it also signifies a limited range, another point of vulnerability.

Reasearchers found that the crabs probably existed in large regions of midocean ridge in the Eastern Pacific, but they are now extinct in those areas. Factors have made the yeti crab been so much more vulnerable to the effects of human resource exploitation and climate change. Most yeti crabs inhabit extreme hábitats; this might point to an ability to adapt, but it also signifies a limited range-another point of vulnerability. A research also reveals that the yeti crabs alive today are probably descended from a common ancestor. This pioneer lived in the southeast Pacific about 30 to 40 million years ago, and inhabited deep sea hydrothermal vent along midocean ridges.

I can conclude, first, that after the investigation, i think is a ver interesting specie, and i think that if the specie dissapeared from its habitat, it would have consequences of course, as every specie, plays a role in their hábitats, for example animals like octopus and fish feed from it, so if it dessapers, other predators would loose that food source, and the crab having bacteria must mean something for wildlife on the oceans. I think this specie has evolved just as everyone, adapting to climate changes, world changes in general, and on the past they may have different

characteristics and behaviour, and the might played other roles, also other capabilities in resistance of the type of weather they had on the water.

Bibliography: Thurber, A. R., Jones, W. J. & Schnabel, K. PLoS ONE. 6, e26243 (2011)

https://wonderopolis.org/wonder/What-is-a-Yeti-Crab E. Macpherson, Jones, W., and Segonzac, M. A new squat lobster family of Galatheoidea (Crustacea, Decapoda, Anomura) from the hydrothermal vents of the Pacific-Antarctic Ridge. Zoosystema, 27:4 (2005) Petersen, J. M., et al. Environ. Microbiol. 12, 2204–2218 (2010) Macpherson, E., Jones, W. & Segonzac, M. Zoosystema 27, 709–723 (2005) Tsuchida, S., et al. J. Mar. Biol. Assoc. UK 91, 23–32 (2011)

Dr.M (march 3, 2015) Antartica body size food Hoff Crab Hydrothermal Vent Sex Yeti Crab. https://factanimal.com/yeti-crab/...