Biogeography and Ecology of the Island of Newfoundland PDF Download
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Author: R. South
Publisher: Springer Science & Business Media
ISBN: 9789061931010
Category : Science
Languages : en
Pages : 750
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Book Description
Author: R. South
Publisher: Springer Science & Business Media
ISBN: 9789061931010
Category : Science
Languages : en
Pages : 750
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 64
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Book Description
Author: Elizabeth Lewis Wenner
Publisher:
ISBN:
Category : Crustacea
Languages : en
Pages : 478
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Book Description
Author: Gerhard W. Pohle
Publisher:
ISBN:
Category : Crabs
Languages : en
Pages : 40
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Book Description
Author: Hubert Jacob Squires
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 554
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Book Description
Eighty-nine species of decapod crustaceans from the Atlantic coast of Canada are described and original drawings provided for each. Distribution records for each species are provided. The Introduction has a brief history of collections of decapod Crustacea in the area, and the Appendix includes a list of mythological references to some taxonomic names used. Tables summarize details of features of appendages according to family. Brief notes on the biology of and fishery for each species where applicable are included.
Author:
Publisher:
ISBN:
Category : Fisheries
Languages : en
Pages : 530
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Book Description
Author: J. A. F. Garrick
Publisher:
ISBN:
Category : Carcharhinus
Languages : en
Pages : 428
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Book Description
Features of the valid nominal species of Aprionodon Gill (isodon Valenciennes) and Hypoprion Müller and Henle (hemiodon Valenciennes, macloti Müller and Henle, and signatus Poey), plus those of a previously unrecognized species here described as Carcharhinus leiodon n.sp., are examined and compared with those of Carcharhinus Blainville. Features studied include morphometrics, vertebral numbers and other vertebral characteristics, tooth numbers, color pattern, and some other aspects of external morphology. It is concluded that on these features C. Leiodon n.sp. is entirely encompassed within the parameters of Carcharhinus, and that, although A. isodon, H. hemiodon, H. macloti, and H. signatus each extend the range of diversity of Carcharhinus in one or more features, A. isodon is not uniquely different from Carcharhinus, and there is no common pattern of difference between the three species of Hypoprion and Carcharhinus. Accordingly, and because the nature of the teeth of Aprionodon and Hypoprion has been found insufficient to warrant generic distinction from Carcharhinus, the genera Aprionodon and Hypoprion are synonymised with Carcharhinus. A diagnosis and description are given for each of the above species. The descriptions include measurements, counts, and line illustrations that show the whole shark in lateral view, underside of head, nostril, and teeth. The geographic distribution is summarized, as are also the meager biological data available on number of embryos, size at birth, size at sexual maturity, and maximum size.
Author: Michel E. Hendrickx
Publisher: Springer Nature
ISBN: 3030584100
Category : Science
Languages : en
Pages : 709
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Book Description
Among the deep-sea marine invertebrates, pycnogonids and crustaceans represent ecologically important and most diverse groups of species. Yet both are still poorly understood. Sampling and exploring operations off the west and east coast of the Americas has significantly increased in the last two decades. However such operations are very costly and limited in number and frequency. In countries like Brazil, Canada, Chile, Colombia, Costa Rica, Mexico, Peru, the United States of America, and El Salvador a large effort has been made to explore the deep-sea resources and the rich diversity of the communities, resulting in a better understanding of the natural ecosystems on both coasts of America. Pycnogonids and many groups of deep-sea crustaceans have been intensively studied, from the smallest animals, like the mostly unknown benthic copepods to the largest decapods. This book presents new and updated information on various groups of deep-sea pycnogonids and crustaceans occurring off the American continent. Offering a valuable reference resource for scientists interested in this fascinating fauna, it includes review papers and new data on the deep-sea communities occurring off the USA, Mexico, El Salvador, Costa Rica, Colombia, Chile, Peru, Brazil and Argentina, as well as in larger areas in both the East Pacific and the West Atlantic. As such it covers most of the current deep-water research in Latin America.
Author: National Research Council Canada
Publisher: NRC Research Press
ISBN: 9780660172217
Category : Science
Languages : en
Pages : 484
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Book Description
Proceedings of a symposium that focused on new, innovative evaluation of the implications and needs for changing management approaches and demands in invertebrate fishery science. Species covered in the presentations include crustaceans, gastropods, echinoderms, and bivalves. Presentations are organized in the following subject areas: assessment of abundance and related parameters; growth, mortality, and yield per recruit; spatial pattern and its implications; the fishing process; population dynamics; the fishery as a selective force; invertebrate fisheries management; and regional perspectives from the north Pacific. The proceedings conclude with a symposium overview.
Author: Lennart Sandberg
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 124
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Book Description
