The Effects of the Wood-boring Isopod Sphaeroma terebrans on the Mangrove Communities of Florida

Investigations conducted along the west coast of Florida from Tampa to Cape Sable have shown that mangroves are confined to the upper portion of the intertidal zone by the wood-boring isopod, Sphaeroma terebrans Bate. As a result of this activity, mangroves are unable to become established throughout the intertidal zone and to extend shorelines in their usual manner.The attack on mangroves is most severe from Marco to Cape Sable, and is probably the single most important factor responsible for the erosion that is currently occurring along this section of coastline. Throughout its length, tides, temperature, and salinity, appear to influence the severity of the attack on mangroves by S. terebrans.Mangrove-dominated estuaries from Tampa to Cape Sable serve as nursery areas and feeding grounds for several commercially important marine fishes and Crustacea. The continual loss of mangroves as a result of S. terebrans activity, erosion, and human interference, may well decrease the extent to which these vital estuaries can be used as nurseries by commercially important species.

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Climate and Exceptional Fish Production off the West Coast of North America

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f93-252 ◽

1993 ◽

Vol 50 (10) ◽

pp. 2270-2291 ◽

Cited By ~ 77

Author(s):

Richard J. Beamish

Keyword(s):

North America ◽

West Coast ◽

The United States ◽

Fish Production ◽

Aleutian Low ◽

The West ◽

Average Growth ◽

Important Species ◽

Wide Range ◽

Commercially Important

From 1976 to 1978 there was a change in the climate over the North Pacific Ocean. The Aleutian Low intensified and there was a warming of the sea surface adjacent to North America and a cooling offshore. Associated with this change was a period of exceptional fish production. Strong year classes and above-average survival occurred for many commercially important species all along the west coast of Canada and the United States. Trends in total salmon catches increased primarily from increased salmon production in Alaska. Some stocks of maturing pink (Oncorhynchus gorbuscha), coho (O. kisutch), and chinook salmon (O. tshawytscha) also had above-average growth in 1977. A majority of commercially important nonsalmon species that spawned from California to the Bering Sea and have a wide range of life history types also had exceptionally strong year classes from 1976 to 1978. The exceptional survival appears to be related to improved ocean productivity caused by changes in the intensity of the Aleutian Low.

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The Ecology of the Tamar Estuary I. Introduction

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400012406 ◽

1938 ◽

Vol 22 (2) ◽

pp. 501-508 ◽

Cited By ~ 26

Author(s):

P. H. T. Hartley ◽

G. M. Spooner

Keyword(s):

Intertidal Zone ◽

Comparable Data ◽

Light Penetration ◽

The West ◽

Tamar Estuary ◽

Quantitative Estimates

During 1936 and 1937 extensive physical and faunistic studies of the Tamar Estuary were made by several workers at the Plymouth laboratory. These investigations, though conducted independently and with different immediate aims, proved to have considerable bearing on one another, and each worker benefited by occasions for co-operation. As the work proceeded it became clear that one of the most important aspects of each investigation was the bearing it had on the balance of life in the estuary as a whole. It was decided to publish the results of these studies in a series of papers in which each contributor should lay due emphasis on data having possible bearings on the problems studied by the others, so as to present as complete a picture as possible.Studies have been made of salinity, temperature, penetration of daylight, macro- and micro-fauna of the intertidal zone, the sessile flora and fauna of the buoys, the fishes and their food, and the birds which frequent the flats and channels. Other studies are contemplated. In the work on light penetration and on quantitative estimates of the fauna of the mud-flats, no comparable data have hitherto been procured in this country.The Tamar is the largest of the rivers which flow into the west end of Plymouth Sound. It is tidal for nearly 19 miles (30 km.) of its course. Rather over 3 miles (5.5 km.) from the sea it is joined by the River Lynher to form the Hamoaze, an estuary common to the two rivers.

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Induced sterility in fish and its potential and challenges for aquaculture and germ cell transplantation technology: a review

Biologia ◽

10.1515/biolog-2016-0118 ◽

2016 ◽

Vol 71 (8) ◽

Cited By ~ 9

Author(s):

Amin Golpour ◽

Mohammad Abdul Momin Siddique ◽

Diógenes Henrique Siqueira-Silva ◽

Martin Pšenička

Keyword(s):

Germ Cell ◽

Cell Transplantation ◽

Large Scale ◽

Hormonal Treatment ◽

Important Species ◽

Genetic Ablation ◽

Germ Cell Transplantation ◽

Commercially Important ◽

Alternative Approaches ◽

Hormone Signalling

AbstractInterest in reproductively sterile fish in aquaculture has prompted research into their production. Several methods are available for inducing sterility and optimizing its application in the global fishery industry. Sterilization can potentially be accomplished through irradiation, surgery, or chemical and hormonal treatment. Alternative approaches include triploidization, hybridization, and generation of new lines via advanced biotechnological techniques. Triploids of many commercially important species have been studied extensively and have been produced on a large scale for many years. Novel approaches, including disruption of gonadotropin releasing hormone signalling and genetic ablation of germ cells, have been developed that are effective in producing infertile fish but have the disadvantage of not being 100% reliable or are impractical for large-scale aquaculture. We review currently used technologies and recent advances in induction of sterility in fish, especially those intended for use in germ cell transplantation. Knowledge of the implications of these approaches remains incomplete, imposing considerable limitations.

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Do changes in reef habitats influence relative predation risk on the juvenile Australasian spiny lobster, Jasus edwardsii (Hutton, 1875)?

Crustaceana ◽

10.1163/15685403-00003447 ◽

2015 ◽

Vol 88 (7-8) ◽

pp. 839-856 ◽

Cited By ~ 4

Author(s):

J. Hesse ◽

J. A. Stanley ◽

A. G. Jeffs

Keyword(s):

Predation Risk ◽

Spatial Scales ◽

Spiny Lobster ◽

Habitat Type ◽

Small Spatial Scale ◽

Important Species ◽

Early Juvenile ◽

Risk Of Predation ◽

Jasus Edwardsii ◽

Commercially Important

Kelp habitats are in decline in many temperate coastal regions of the world due to climate change and expansion of populations of grazing urchins. The loss of kelp habitat may influence the vulnerability to predators of the juveniles of commercially important species. In this study relative predation rates for kelp versus barren reef habitat were measured for early juvenile Australasian spiny lobster, Jasus edwardsii (Hutton, 1875), on the northeastern coast of New Zealand using tethering methods. Variation in assemblages of predators over small spatial scales appeared to be more important for determining the relative predation of lobsters, regardless of habitat type. Therefore, the assessment of relative predation risk to early juvenile lobsters between kelp and barren habitats will require more extensive sampling at a small spatial scale, as well as a specific focus on sampling during crepuscular and nocturnal periods when these lobsters are most at risk of predation.

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Feeding of the Brycon cephalus, Triportheus elongatus and Semaprochilodus insignis (osteichthyes, characiformes) larvae in Solimões/Amazonas River and floodplain areas.

Acta Amazonica ◽

10.1590/1809-43922002323515 ◽

2002 ◽

Vol 32 (3) ◽

pp. 499-499 ◽

Cited By ~ 13

Author(s):

Rosseval Galdino LEITE ◽

Carlos A.R.M. ARAUJO-LIMA

Keyword(s):

Food Item ◽

Prey Size ◽

Larval Fish ◽

Fish Larvae ◽

Trophic Relations ◽

Fish Feeding ◽

Important Species ◽

Flooded Forests ◽

Commercially Important

Information on larval fish feeding is essential for understanding their trophic relations, including the management in conditions totally or partially controlled by humans. An experiment was designed to evaluate the larval diets of three commercially important species. Four varzea-lakes and the adjacent river were sampled with bongo and hand nets from January 1993 to November 1995. Larval diets were evaluated by length-classes and capture sites, and were tested by two factor ANOVA. The larvae were feeding in all habitats, except in the flooded forests. The three species had different diets, which varied with their length and lake. The rotifers were the main initial food item of the three species, replaced by fish larvae in Brycon cephalus, cladocerans in Triportheus elongatus and detritus in Semaprochilodus insignis. The increase of the ingestion limit, as the larvae grew, was higher than the increase in the consumed prey size for the three species.

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LWR models of 2 commercially important species from the Bulgarian marine area

Sustainable Development and Innovations in Marine Technologies ◽

10.1201/9780367810085-83 ◽

2019 ◽

pp. 622-631

Author(s):

I. Zlateva ◽

N. Nikolov ◽

V. Raykov ◽

M. Yankova

Keyword(s):

Important Species ◽

Marine Area ◽

Commercially Important

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Possible impacts of zoosporic parasites in diseases of commercially important marine mollusc species: part I. Perkinsozoa

Botanica Marina ◽

10.1515/bot-2016-0132 ◽

2017 ◽

Vol 60 (4) ◽

Cited By ~ 1

Author(s):

Frank H. Gleason ◽

Osu Lilje ◽

Cecile Dang ◽

Sabrina Geraci-Yee ◽

Jackie L. Collier

Keyword(s):

Important Species ◽

Marine Mollusc ◽

Mollusc Species ◽

Commercially Important

AbstractThe phylum Perkinsozoa includes well-known parasites of commercially important species of molluscs in aquaculture, such as

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Artificial maturation, fertilization, and early development of the American eel (Anguilla rostrata)

Canadian Journal of Zoology ◽

10.1139/z10-081 ◽

2010 ◽

Vol 88 (11) ◽

pp. 1121-1128 ◽

Cited By ~ 43

Author(s):

K. Oliveira ◽

W. E. Hable

Keyword(s):

Early Development ◽

Anguilla Rostrata ◽

Sargasso Sea ◽

American Eel ◽

Important Species ◽

Vitro Fertilization ◽

Commercially Important ◽

Elusive Species ◽

American Eels

Spawning for the American eel ( Anguilla rostrata (Le Sueur, 1817)) takes place in secretive locations within the Sargasso Sea, which has thus far prevented investigations of gametogenesis and early development in this ecologically and commercially important species. Attempts to induce maturation and reproduction in this species have been few and have produced limited results, with a single report of the production of gastrula-stage embryos. Here we report the successful maturation of female American eels. Maturation occurred within 13 weeks and ovulation was induced with a single injection of 17α,20β-dihydroxy-4-pregnen-3-one (DHP). Following in vitro fertilization, embryogenesis through hatching was observed and larvae were maintained for up to 6 days. We show that a crucial factor for successful fertilization is the stage of the oocyte at the time of induced ovulation. Oocytes that had not reached the migratory nucleus stage, or had passed this stage, were not successfully fertilized. These findings demonstrate that American eel can reproduce in the laboratory and previously untestable hypotheses pertaining to the developmental biology of this elusive species can now be explored.

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