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Marine Resource Bulletin Vol. 23, No. 3 & 4, Virginia Sea Grant, Virginia Institute Of Marine Science

Virginia Marine Resource Bulletin

Contents

The Great Migration

Sharks

Rays

A Solution to a Costly Problem: A Ray Fishery

1990 VIMS Trawl Survey

Juvenile Stock Assessment

Anadromy, CatadromyVariations on a Curious Theme

Research in the Name of Caretta caretta

Endangered: Sea Turtles

Thunnus thynnus-In Trouble

Hundreds of Miles, Millions of Dollars

Virginia Offshore Waters, Productive Feeding Grounds

Fish House Kitchen

Lobster Regulations, Not Only for Lobstermen

Soft Shell Clam Mya Arenaria, Patrick K. Baker, Roger L. Mann

VIMS Books and Book Chapters

Large populations of soft shell clams persist only in relatively shallow, sandy, mesohaline portions of the Chesapeake Bay. These areas are mostly in Maryland, but also occur in the Rappahannock River, Virginia. In some other portions of the Bay, especially polyhaline portions, low populations of soft shell clams persist subtidally. Restricted populations persist intertidally.

Soft shell clams grow rapidly in the Chesapeake Bay, reaching commercial size in two years or less. They reproduce twice per year, in spring and fall, but probably only fall spawnings are important in maintaining population levels. Major recruitment events do not occur in most years, …

Selecting And Developing Reliable Bore Sites In The Eastern Wheatbelt, Richard George

Bulletins 4000 -

In the Western Australian wheatbelt, groundwater supplies contribute about 40 per cent of the on-farm livestock requirements and occasionally domestic water supply systems. The first part of this Bulletin comments on sites suitable for both high yielding bores and also those which yield water suitable for livestock. The second part outlines techniques for constructing and developing a bore. Throughout this Bulletin livestock quality water, for adult sheep, is defined as groundwater of less than 12,000 mg/L (or 850 grains per gallon) which has not been subject to localized pollution. For other livestock, the maximum salinities range from 2,600 mg/L for …

Hard Clam Mercenaria Mercenaria, G. Curtis Roegner, Roger L. Mann

VIMS Books and Book Chapters

The hard clam is found along the eastern coast of North America from the Gulf of St. Lawrence to Texas. In Chesapeake Bay, the hard clam is restricted to salinities above approximately 12 ppt. An extensive survey of hard clam resources is overdue.

Statements concerning long term trends in populations are not feasible. Hard clams ·grow to a maximum shell length of about 120 mm. There are few documented cases of diseases in wild hard clam populations. Parasitic infestations are also slight. The life cycle of the hard clam includes a pelagic larval phase and a relatively sedentary benthic juvenile …

Marine Resource Bulletin Vol. 23, No. 1 & 2, Virginia Sea Grant, Virginia Institute Of Marine Science

Virginia Marine Resource Bulletin

Contents

Introduction

Clam Culture? Cultured Fish??

Outrunning Oyster Pathogens

Steamed Bay Scallops

Developing a Disease-Resistant Oyster

Seafood Consumption in the Year 2000

Callinectes sapidus, beautiful swimmer

Growing Fish Anywhere

On the Cutting Edge

Assessing the Hybrid Striped Bass Market

Reducing Off-flavors in Cultured Fish

For Commercial and Recreational Fishermen

Fish House Kitchen

Long Term Culture Of Hepatocytes Of Some Fish Species Of The Chesapeake Bay, M. Faisal, N. Youssef, R. Huggett

VIMS Books and Book Chapters

The liver is an important site of metabolism and effects of toxic chemicals. This makes it an important organ for tumorigenesis studies. This study was aimed at investigating the optimal culture characteristics of liver cells derived from some indigenous Chesapeake Bay fish species. Hepatocytes from Atlantic -menhaden (Brevootia tyraMus), toadfish (Opsanus tau), croaker (Micropogonius undulatus), and hogchocker (Trinectes maculatus) were isolated using an enzymatic dispersion technique. The highest yield was obtained from toadfish livers (14.9±5. lx 1 o5 cells/g oflive weight) and the lowest was from the croaker (5.9±3. lx 1 o5 cells/g of live body weight). The percentage of …