Following the acquisition of EFE & GB Nets earlier this year, NHBS now manufactures a wide range of plankton nets at our workshop in Devon. Nets are available with an opening diameter of 250mm, 300mm or 500mm and with mesh sizes ranging from 10µm to 500µm.
250mm and 300mm diameter nets
250mm and 300mm diameter nets have a stainless steel frame to which a 500mm long bag is attached. They are supplied with a harness and seven metre long towing line which can be used to tow the net behind a boat or from a suitable bank or jetty.
The standard cod end is fitted with a filter in the same mesh size as the main part of the bag. However, various alternatives can be selected at the time of ordering. Options include a clear extension tube, collecting bottle, tap valve or large filter fitted in place of the standard filter. It is also possible to have weight loops added to the end of the net (weights not included) or a stainless steel swivel to be used on the harness in place of the standard nylon ring.
The heavy duty upgrade uses heavy duty nylon for the net collar and cod end collar and also includes fully taped seams.
500mm diameter nets
500mm diameter nets have a stainless steel frame and 1900mm long bag and a three point harness with swivel connector. All seams are reinforced and the collar is made from industrial nylon for added strength and durability. The cod end of the bag is fitted with a heavy duty screw-on filter in the same mesh size as the bag. This net is not supplied with a towing rope and so users will need to supply their own rope or chain which can be fitted to the harness.
As with the smaller plankton nets, various adaptations are available in order to create a net which is suited to your sampling needs. A flexible cod end extension allows a greater sample volume to be collected and also lets you connect a different filter type. A replacement cod end cap provides a closed ended option and results in a sample size of 700ml and a quick release bag is ideal for collecting fry or elver or for when a rapid changeover of bags is required.
Net bags and the educational plankton net
As well as standard plankton nets, we also stock a range of plankton net bags designed to fit onto the professional hand net frame. These fit onto the frame in the same way as the standard hand net bags, and have a detachable screw-on filter in the centre. An educational plankton net with 150µm mesh is also available for school use or for those who require an economical net for trial sampling.
We also learned about the importance of citizen awareness in the Global Fishing Watch project. This amazing new scheme uses satellite data to make global issues of overfishing much more transparent, as well as making huge quantities of fisheries science data available to researchers.
A full-colour identification guide to members of the genus Carcharhinus, notably difficult to distinguish by species.
We are always really impressed by the books published by Verlag Friedrich Pfeil, and this is no exception. The excellent drawings by master technical artist Weber, carefully indicate the relevant anatomical distinctions between the 33 species covered, and the research is immaculate, providing all the facts required for identification. In addition there is plenty of information on the biology and natural history of the genus, plus a glossary of technical terms and many maps, tables and plates.
As well as appealing to marine biologists and shark enthusiasts, this volume has further application in the fields of fisheries, diving and other aquatic sports – in other words for anyone to whom positive species identification would be relevant.
It is hoped that this book will go some way to providing clearer records about threatened shark populations.
Dr Matthias Voigt studied marine biology at the University of Rostock (2000-2004), received his PhD from the University of Karlsruhe and now works at the University of Konstanz in the Department of Biology, Human Environmental Toxicology Group. He has had many experiences with sharks while diving, and as a member of the German Elasmobranch Society (D.E.G.), he tries to impart his experience, knowledge and fascination with sharks to the general public for increased understanding and protection.
Dietmar Weber is likewise a member of the D.E.G., and has a passion for the lifelike portrayal of animals, an art form which he has perfected over the last forty years. He is currently focused on sharks, skates and rays and his work has been featured in many publications. A graduate professional Technician for Biology i.e. Ecology, he has worked at the Research Institute for Forest Ecology and Forestry of Rhineland-Palatinate in Trippstadt since 1989.
A few weeks ago, I attended the 14th Biennial EURASLIC Meeting. EURASLIC is the European Association of Aquatic Sciences Libraries and Information Centres. This year’s meeting on the topic Caught in the “fishing net” of information was hosted by Cemagref, in Lyon, France. The weather was lovely, the food excellent, and it was a joy to spend a few days in the company of extremely knowledgeable librarians from many countries.
Among other things, I talked on the topic of hard-to-find books in Marine Biology (here is the Powerpoint Presentation of my talk). At NHBS, we have great experience in identifying and cataloguing specialist titles published by small publishers, and we know how much effort is involved in the process. In passing the information on to libraries through our Monthly Catalogue, our online catalogue, and topical newsletters, we hope to make these publications known to a much wider audience. Every week, we see new books that are not available to buy from mainstream booksellers.
Some examples of titles that should be on the shelves of every marine biology library in Europe, but are not always known to librarians, include:
We are always struck by just how varied and inspiring is the range of books we come across at NHBS, and challenged to give stand-out books their due. To this end, we’ll be highlighting a book every week here on the Hoopoe, as our Book of the Week. All books are chosen by us – no publisher’s endorsements! Simply our “what? why? who?” guide to the superb scientific texts, monographs, field guides or natural history books that we think you need to hear about…
This is an introduction to the most important and most common taxa present in the plankton. It is intended as a guide for students, marine researchers and even the interested lay person, and contains 930 micrographs (nearly three-hundred more than the first edition) allowing the identification of numerous common species, now including some from Mediterranean waters.
With its huge number of colour photographs it complements, and is recommended as a photographic supplement to, the illustrations of more comprehensive taxonomic keys – helping students and others without extensive taxonomic experience to gain a better grounding in plankton identification.
Prof. Dr. Otto Larink is a zoologist. During annual courses at the Biological Station on the isle of Helgoland in the German Bight since 1963 and during various visits at European coasts he has observed the diversity of plankton organisms and documented them with many micrographs presented here.
Prof. Dr. Wilfried Westheide is also a zoologist specialising in systematics and morphology of invertebrates, especially annelids.
This book provides a comprehensive introduction to the biology and ecology of plankton and describes its use as a tool for monitoring water quality. All the major freshwater and coastal phytoplankton and zooplankton groups are covered and their associated environmental issues are discussed. A chapter on best practice in sampling and monitoring explains how to design, implement and conduct meaningful phytoplankton and zooplankton monitoring programs in marine and freshwater habitats, as well as how to analyse and interpret the results for effective management decision-making.
The second edition of the classic textbook The Diversity of Fishes has just been published and is now in stock at NHBS.
This new edition represents a major revision of the world’s most widely adopted ichthyology textbook. Expanded and updated, the second edition of The Diversity of Fishes is illustrated throughout with striking color photographs depicting the spectacular evolutionary adaptations of the most ecologically and taxonomically diverse vertebrate group. The text incorporates the latest advances in the biology of fishes, covering taxonomy, anatomy, physiology, biogeography, ecology, and behavior.