plankton trawl

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• Plankton — For other uses, see Plankton (disambiguation). Photomontage of planktonic organisms Plankton (singular plankter) are any drifting organisms (plants …   Wikipedia

• Continuous Plankton Recorder — The Continuous Plankton Recorder (CPR) survey is one of the longest running marine biological monitoring programmes in the world. Started in 1931 by Sir Alister Hardy, the CPR has provided marine scientists with their only measure of plankton… …   Wikipedia

• Manta trawl — A Manta Trawl is a net system for sampling the surface of the ocean. It resembles a manta ray, with metal wings and a broad mouth. The net it pulls is made of thin mesh, and the whole trawl is towed behind a scientific research vessel.[1] The… …   Wikipedia

• ring trawl — a coarse mesh plankton net used to collect fish larvae …   Dictionary of ichthyology

• agassiz trawl — ˈagə(ˌ)sē noun Usage: usually capitalized A Etymology: after Alexander Agassiz died 1910 American zoologist : a dredge that consists of a heavy rectangular iron frame to which is fitted the mouth of a bag of stout netting and that is used in… …   Useful english dictionary

• commercial fishing — Introduction  the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them.       Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… …   Universalium

• undersea exploration — Introduction       the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments       Included in the scope of undersea exploration are the physical and chemical… …   Universalium

• Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …   Wikipedia

• Valdivia-Expedition — Die Valdivia 1898 Die Valdivia Expedition war die erste groß angelegte deutsche Expedition zur Erforschung der Tiefsee. Ihr Initiator und wissenschaftlicher Leiter war der Zoologe Carl Chun. Das Forschungsschiff Valdivia, ein für die Expedition… …   Deutsch Wikipedia

• environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …   Universalium

• Bottom trawling — The Celtic Explorer, a research vessel engaged in bottom trawling …   Wikipedia