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Sea Squirts and Sea Sponges of Britain and Ireland
Sea squirts and sponges are found in most seafloor habitats around the coasts of Britain and Ireland. Despite being the dominant life forms in many areas, these two groups of under-recorded marine animals are often confused with one another, and most divers and snorkellers can recognise and name very few species. In fact, around 500 species of Ascidiacea (sea squirts) and Porifera (sponges) have been described so far in British and Irish seas, corresponding to over 4% of the world’s total. This book is recommended reading for anyone who wants to identify and discover more about these fascinating and diverse animals. Rather than relying on the characteristics of preserved specimens, this gu...
Beyond the Sea Squirt
At the most fundamental level the only reason we have a brain is because we move. To develop the ability to feel and think actually requires movement as a first step. Sea squirts illustrate this well. Sea squirt larvae have a very rudimentary brain and nervous system. However, they have no mouth or way to feed. The larvae are able to move to the sea floor where they cement themselves head first and this is where they will stay. As the sea squirt will never move from that spot it no longer needs its brain and nervous system so it starts absorbing it. This absorption gives the larvae enough nutrients to be able to build the circulatory, digestive and reproductive systems necessary to sustain i...
Science for All
None
Aquatic Life of the World
Examines every major aquatic organism as well as lesser-known and rare life-forms including water-dwelling plants and animals and the algae and bacteria that constitute the first links in the food chain.
The Ancestor's Tale
A renowned biologist provides a sweeping chronicle of more than four billion years of life on Earth, shedding new light on evolutionary theory and history, sexual selection, speciation, extinction, and genetics.
A Secret World
Underwater exploration is a fascinating activity because of the richness of sea life, the beautiful colors, and the contrast with terrestrial life. It can be done by diving or snorkeling -today there is fine equipment for diving and taking underwater pictures and, apart from being a source of pleasure, it forms the basis of modern ecological and behavioral marine studies. Diving is an emotional activity. The silence of the submarine world, only interrupted by breathing, has more than once evoked the monsters of the fabulous tales of my youth. Maybe because, although much time has elapsed since then, I still have a youth's ability to evaluate everything for the fascination it conveys. However, no more than that can be gained from underwater watehing. I am not saying that this is destined to be a futile exercise. Picasso watched sea urchins much in the same way while revealing their quintessence in his paintings at the Castle of Antibes. What I mean is that today marine life can also be viewed from the perspective of the natural products involved. This knowledge, subsequent to Picasso's time, adds much to the overall picture.
Science for All
None
The Diver's Guide to Marine Life of Britain and Ireland
"Completely revised and expanded this Second Edition covers almost 300 individual species and groups of species seen underwater, from tiny fragile sea spiders to the massive planktonƯfeeding Basking Shark"--Publisher's website
Genesis Revealed
The lines have been drawn. On one side are young earth creationists, who assert that God created the universe in six days and-based on calculations derived from the Bible-that the earth is six thousand years old. On the other side are secular scientists, who claim the universe has existed for over thirteen billion years, the earth for 4.5 billion. Scientists claim that no miracles were necessary to form the universe, and that everything is explained by natural causes. However, young earth creationists point to verses at the beginning of the Bible and the beginning of the book of John that clearly claim that God created the universe. In the beginning God created the heavens and the earth. The...
