Crayfish are decapods pertaining to the phylum arthropoda, which are invertebrates and contain an open-circulatory system.1 The system works by the hemolymph getting re-oxygenated in the gills before being transporting to the heart by brachio-cardiac veins and then pumped to sinuses that bathe tissues with oxygenated hemolymph.2 The crayfish contain a neurogenic heart that depends on neuronal input from cardiac ganglion.3 The neurogenic heart requires nerve impulses to produce contractions in contrast to a myogenic heart that can contract independently from the nervous system.3 The crayfish heart will beat due to the reaction of the ganglion to stimuli in the environment.4 Stimuli will affect the autonomic nervous system in the crayfish that control involuntary actions such as the heart rhythm.4 Neurotransmitters are the chemical signals in which the nervous system regulates both heart rate and contraction.3The autonomic nervous system breaks into two categories as parasympathetic system that is involved in relaxation of organs and the sympathetic system that will stimulate increased activity. Neurotransmitters can either increase or decrease heart rate by altering the patterns in neural activity of the heart.4 Crayfish are poikilotherms, which means they cannot metabolically thermoregulate thus conform to the ambient temperature in the water.
“A righteous man regardeth the life of his beast: but the tender mercies of the wicked are cruel” (King James Version, Prov. 12.10). In order to fully regard the life of God’s beasts, we must preserve/facilitate their population so others can look and marvel at God’s creation. Information shows that seahorse populations are commonly vulnerable to heavy exploitation due to traditional Chinese medicine (TCM), aquarium trade, and destruction of natural habitats (Allee). The IUCN red list of threatened species tracks animal populations and classifies them based on conservation status. Many species of seahorse such as the Hippocampus Reidi are classified as data deficient; showing there is a lack of research and concern over these disappearing
The Keepers from the Plankton Factory are being charged with child abuse. Esperanza Mendoza the leader of the Convent in San Lois caught the Keepers beating up children and duct taped one other children. Some kids testified against the Keepers. Most of the kids say that Jorge Martinez had beaten some of the kids that work there. Fidelito Lopez states, “I was there, Jorge had grab a cane out of a closet and he was going to beat me with it, but Matt had came out and took the cane from Jorge.
Jellyfish may seem like cool creatures, but in reality they hurt people and eat fish, but if we would like less pain in the world we can kill the jellyfish and we can even cook them and make interesting foods out jellyfish. Body Paragraphs: Jellyfish are violent creatures. They hurt humans and fish. Article “Jellyfish Ecology” by Rosalind Fonem says, “For an animal that has does not have a brain, a heart, or blood, jellyfish have a negative impact in many places in the world.” Jellyfish are literally
Hannah Ton Mrs. Braun Honors American Literature 1 November 2015 SeaWorld Orca Breeding Should Not Be Continued When Dr. Heather Rally, a veterinarian who specializes with marine mammals, visited SeaWorld, she witnessed an orca with a severely collapsed fin and asked an “educational” guide why its fin was bent. The guide replied that it was a genetic trait just like curly or straight hair. However, Rally knows the truth, scientific evidence suggests that the high rate of dorsal fin collapse in captive orcas is due to conditions of captivity. These include spending an abnormally long time at the surface in direct sunlight and continuously swimming in tight circles.
The algae washes up on shores and destroy the beautiful of the beaches. This also has a side effect on the economy. A nuclear power plant had to be shut down from the algae problem which has cost them hundreds of thousands of dollars per day.
Kuhl’s stingray The Blue spotted stingray is also known as the Kuhl’s stingray. DESCRIPTION The Blue spotted stingray is a flat round shape averaging 42 centimetres in diameter and 70 centimetres in length.
I think that SeaWorld is an amazing facility. I love the fact that they rescue sea creatures from their inevitable death. I love the fact that children love to come here. I love the fact that this place causes children to subconsciously learn something. I love to bring my kids here on the weekend to watch the shows that the trainers put on with the orcas.
Señor Fish is a casual Mexican eatery with a Cantina-style outpost atmosphere. Unlike many Mexican restaurants, all three meals are available providing the ability to enjoy this cuisine any time of the day. Breakfast options include red or green chilaquiles, huevos rancheros, breakfast sopes, breakfast burrito, veggie or seafood omelette, French toast and more. The lunch taco special makes Señor Fish perfect for a quick, affordable meal. It includes two tacos with rice and beans or a salad.
How to free dive, not with oxygen tanks, and not off of a diving board. Free diving is purely breath hold, without oxygen tanks or air pockets. Diving for lobster is very important to me because it is a hobby that I share with my dad and also my uncles. Diving is a hobby that forces many people out of their comfort zone, and puts me back into mine. I love diving because, you are able to think so many things while being completely silent.
Habitat Istiophorus are saltwater fish. They like to live in the warmer south Atlantic and Pacific where the water is dramatically warmer. There are two main species of sailfish. The first more well known sailfish is the Atlantic sailfish. The other is the Indo-Pacific sailfish.
Octopuses In the ocean they 're is a multitude of different species of marine life. These differnet species range from simple plankton all the way up to sharks. Although the common perseption that sharks are at the top of the food chain there is a fierce competitor with the sharks and that would be the octopus.
Therefore, they reside in the upper 200 to 300 feet (60-90meters) of ocean water. Algal blooms can occur due to a number of natural
Angela, Your post was very informative. I would have never thought that just by wearing sunscreen and going to the beach it would lead to the destruction of coral reefs! I will keep that in mind the next time I go to the beach. In addition, would you have any suggestions for substitutes that may not have such a harmful effect on the environment? Also, for those who have sensitive skin but love the beach, would you think that their tradeoff for personal pleasure is greater than the preservation of coral reefs?
Marine organisms are animals, plants, and other living things that live in the ocean. A Marine biologist is a scientist who studies marine organisms and studies the bodies, behavior, and the history of marine organisms. They also study how marine organisms interact with each other and their environment. I have chosen to research about Marine biology because I would like to learn about sea life, the ocean, and its surrounding environment. To start off, a Marine biologist might study coral, crabs, fish, microscopic marine organisms, sea stars, seaweed, squid, or whales.
