Results 261 to 270 of about 127,493 (309)

Invertebrate Aquatic Animals

2016
Sponges are classified as the simplest metazoan phylum of the animal kingdom. They have a hollow circular body that filters out the water of the environment, retaining the food. Spongin is a protein that is the main part of the body and a “skeleton” of spikes consisting of calcium carbonate and silica hardens it.
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Aquatic Invertebrate Dormancy and Medicine

2019
Aquatic organism dormancy has interesting medical applications, which include dormancy in parasite species, dormancy in intermediate hosts of parasites, and several diseases that seem to present a kind of dormancy. Among these, the most remarkable is the state of dormancy in some types of cancer, one of the most serious human diseases.
Mei-Hiu Tseng, Jiang-Shiou Hwang, Victor R. Alekseev   +2 more
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Infertility in male aquatic invertebrates: A review

Aquatic Toxicology, 2012
As a result of endocrine disruptor studies, there are numerous examples of male related reproductive abnormalities observed in vertebrates. Contrastingly, within the invertebrates there have been considerably less examples both from laboratory and field investigations.
Lewis, C., Ford, Alex
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Assessment of Aquatic Invertebrates

2009
The assessment of freshwater habitats using benthic macroinvertebrates as a proxy indicator of the general ‘health’ of the freshwater environment has a long and illustrious history. This chapter introduces the means of undertaking such assessments. It outlines how and when to sample, the differing strategies used, depending on the questions to be asked
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Respiratory faculties of aquatic invertebrates

2019
Abstract This chapter introduces the ‘who has what’ in terms of respiratory organs for major water-breathing invertebrate groups. It begins with sponges and cnidarians—groups that have no recognizable respiratory faculty—and continues through the bilaterian lineage, pointing out how bits and pieces of a respiratory faculty accumulate ...
Steven F. Perry, Markus Lambertz, Anke Schmitz   +2 more
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Sampling invertebrates: aquatic environments

1998
Abstract This chapter outlines the principles and conditions for use of some of the techniques used to sample invertebrates from aquatic habitats, both fresh¬ water and marine. Many of the principles and apparatus are similar for the two habitats, but there are numerous differences due to scale and ease of access.
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Pesticide Residues in Aquatic Invertebrates

1973
The basic processes governing formation of pesticide residues are common to all organisms. Separate consideration of residues in aquatic invertebrates is therefore a rather arbitrary choice, but a practical one for purposes of literature review.
S. R. Kerr, W. P. Vass
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The tolerance of oxygen by aquatic invertebrates

Proceedings of the Royal Society of London. Series B - Biological Sciences, 1955
Aquatic invertebrates were found to be affected to very different extents by water saturated with oxygen; some species were quickly killed, others were slowly injured, while yet others showed no ill effects in the course of weeks. Many of the animals studied lived equally well in fully aerated and in one-fifth aerated water, only a few species ...
H M, FOX, A E, TAYLOR
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Habitat Selection by Aquatic Invertebrates

1972
Publisher Summary This chapter focuses on habitat selection by aquatic invertebrates. It explains why animals are found in certain habitats and not in others, and it is restricted to a consideration of habitat selection by marine and freshwater invertebrates as revealed by experimental analysis.
P.S. Meadows, J.I. Campbell
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Aquatic invertebrates in riverine landscapes

Freshwater Biology, 2002
1. Riverine systems consist of a mosaic of patches and habitats linked by diverse processes and supporting highly complex communities. Invertebrates show a high taxonomic and functional diversity in riverine systems and are in several ways important components of these systems.
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