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Biology of the Sea Lamprey in Its Parasitic Phase

Biology of the Sea Lamprey in Its Parasitic Phase PDF Author: Phillip Sheridan Parker
Publisher:
ISBN:
Category : Lampreys
Languages : en
Pages : 36

Book Description
Most of the experimental lampreys were mature and rip after 14 to 18 months of parasitic life. They exhibited signs of irreversible physical degeneration which precedes death. Three specimens were immature at 14, 18, and 26 months in aquariums, thus indicating that under certain conditions, lampreys may extend their parasitic phase.

Biology of the Sea Lamprey in Its Parasitic Phase

Biology of the Sea Lamprey in Its Parasitic Phase PDF Author: Phillip Sheridan Parker
Publisher:
ISBN:
Category : Lampreys
Languages : en
Pages : 36

Book Description
Most of the experimental lampreys were mature and rip after 14 to 18 months of parasitic life. They exhibited signs of irreversible physical degeneration which precedes death. Three specimens were immature at 14, 18, and 26 months in aquariums, thus indicating that under certain conditions, lampreys may extend their parasitic phase.

The Biology of Lampreys

The Biology of Lampreys PDF Author: M. W. Hardisty
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 492

Book Description


Jawless Fishes of the World

Jawless Fishes of the World PDF Author: Richard Beamish
Publisher: Cambridge Scholars Publishing
ISBN: 1443889644
Category : Science
Languages : en
Pages : 436

Book Description
Hagfishes and lampreys, both examples of jawless fishes, are elongated, eel-like animals lacking paired fins, and are the only living representatives of ancient creatures that gave rise to current species of fish and, eventually, humans. This volume provides an overview of the current status of knowledge on a variety of topics related to jawless fishes, including their taxonomy, zoogeography, phylogeny, molecular biology, evolution, life history, role in the ecosystem, and fisheries and management of hagfishes and lampreys worldwide. This is the first book dealing exclusively with the various aspects of jawless fish species throughout the world. It brings together a number of papers providing new data on jawless fishes, and offers readers a range of useful information within a single reference, reflecting the growing appreciation for hagfishes and lampreys worldwide.

Great Lakes Sea Lamprey

Great Lakes Sea Lamprey PDF Author: Cory Brant
Publisher: University of Michigan Press
ISBN: 0472126032
Category : Nature
Languages : en
Pages : 215

Book Description
The stuff of nightmares in both their looks and the wounds inflicted on their victims, sea lampreys (Petromyzon marinus) are perhaps the deadliest invasive species to ever enter the Great Lakes. At the invasion’s apex in the mid-20th century, harvests of lake trout (Salvelinus namaycush), the lampreys’ preferred host fish in the Great Lakes, plummeted from peak annual catches of 15 million pounds to just a few hundred thousand pounds per year—a drop of 98% in only a few decades. Threatening the complete collapse of the fishery, the sea lamprey invasion triggered an environmental awakening in the region and prompted an international treaty that secured unprecedented cooperation across political boundaries to protect the Great Lakes. Fueled by a pioneering scientific spirit, the war on Great Lakes sea lampreys led to discoveries that are the backbone of the program that eventually brought the creature under control and still protects the largest freshwater ecosystem in the world to this day. Great Lakes Sea Lamprey draws on extensive interviews with individuals who experienced the invasion firsthand as well as a trove of unexplored archival materials to tell the incredible story of sea lamprey in the Great Lakes—what started the invasion, how it was halted, and what this history can teach us about the response to biological invaders in the present and future. Richly illustrated with color and black & white photographs, the book will interest readers concerned with the health of the Great Lakes, the history of the conservation movement, and the ongoing threat of invasive species.

Lampreys: Biology, Conservation and Control

Lampreys: Biology, Conservation and Control PDF Author: Margaret F. Docker
Publisher: Springer
ISBN: 9401793069
Category : Science
Languages : en
Pages : 451

Book Description
The book provides the most comprehensive review of lamprey biology since Hardisty and Potter’s five-volume “The Biology of Lampreys” published more than 30 years ago. Published in two volumes, it includes contributions from international lamprey experts, reviewing and providing new insights into the evolution, general biology, and management of lampreys worldwide. This first volume offers up-to-date chapters on the systematics, general biology, conservation status, and conservation needs of lampreys. It will serve as an important reference for researchers working on any aspect of lamprey biology and fishery managers whose mandate is to control or conserve lamprey populations.

Lampreys: Biology, Conservation and Control

Lampreys: Biology, Conservation and Control PDF Author: Margaret F. Docker
Publisher: Springer
ISBN: 9402416846
Category : Science
Languages : en
Pages : 590

Book Description
This book, published in two volumes, provides the most comprehensive review of lamprey biology since Hardisty and Potter’s “The Biology of Lampreys” published more than 30 years ago. This second volume offers a synthesis of topics related to the lamprey gonad (e.g., lamprey sex ratios, sex determination and sex differentiation, sexual maturation, and sex steroids), the artifical propagation of lampreys, post-metamorphic feeding and the evolution of alternative feeding and migratory types, the history and status of sea lamprey control in the Laurentian Great Lakes and Lake Champlain, and an overview of contributions of lamprey developmental studies for understanding vertebrate evolution.

The Death and Life of the Great Lakes

The Death and Life of the Great Lakes PDF Author: Dan Egan
Publisher: W. W. Norton & Company
ISBN: 0393246442
Category : Science
Languages : en
Pages : 306

Book Description
New York Times Bestseller Winner of the Los Angeles Times Book Prize Winner of the J. Anthony Lukas Award "Nimbly splices together history, science, reporting and personal experiences into a taut and cautiously hopeful narrative.… Egan’s book is bursting with life (and yes, death)." —Robert Moor, New York Times Book Review The Great Lakes—Erie, Huron, Michigan, Ontario, and Superior—hold 20 percent of the world’s supply of surface fresh water and provide sustenance, work, and recreation for tens of millions of Americans. But they are under threat as never before, and their problems are spreading across the continent. The Death and Life of the Great Lakes is prize-winning reporter Dan Egan’s compulsively readable portrait of an ecological catastrophe happening right before our eyes, blending the epic story of the lakes with an examination of the perils they face and the ways we can restore and preserve them for generations to come.

The Progressive Fish Culturist

The Progressive Fish Culturist PDF Author: U.S. Fish and Wildlife Service
Publisher:
ISBN:
Category : Fish culture
Languages : en
Pages : 824

Book Description


The Development of an Aquatic Habitat Classification System for Lakes

The Development of an Aquatic Habitat Classification System for Lakes PDF Author: W.D.N. Busch
Publisher: CRC Press
ISBN: 135108559X
Category : Science
Languages : en
Pages : 238

Book Description
In the context of freshwater fisheries changing their strategies from the regulation of harvest and the enhancement of populations, to the creation and protection of habitats and the management of ecosystems, moves toward establishing an aquatic habitat classification system. Eight papers, from the February 1988 Symposium on the Classification and Inventory of Great Lakes Aquatic Habitats (the last in a series of Great Lakes Symposia), propose various classification approaches, most using a limited number of physical, chemical, and/or biological variables to produce some form of index. They also include overviews and summaries of the classification process.

Lake Champlain, Use of Lampricides with an Assessment of the Effect on Sportfisheries (NY,VT,Quebec)

Lake Champlain, Use of Lampricides with an Assessment of the Effect on Sportfisheries (NY,VT,Quebec) PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 460

Book Description