Post-Cephalic White Spot Syndrome in Salmonids

This report documents a phenomenon in salmonids involving one or more white spots generally located in the mid-dorsal nape or occipital region immediately posterior of the fishes ’ head. The syndrome, post-cephalic white spot (PCWS), varies widely among populations. When present it often is found in...

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Main Author: William R. Heard
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.561.4061
http://www.npafc.org/new/publications/Technical Report/TR5/page 100-102(Heard).pdf
id ftciteseerx:oai:CiteSeerX.psu:10.1.1.561.4061
record_format openpolar
spelling ftciteseerx:oai:CiteSeerX.psu:10.1.1.561.4061 2023-05-15T15:32:38+02:00 Post-Cephalic White Spot Syndrome in Salmonids William R. Heard The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.561.4061 http://www.npafc.org/new/publications/Technical Report/TR5/page 100-102(Heard).pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.561.4061 http://www.npafc.org/new/publications/Technical Report/TR5/page 100-102(Heard).pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.npafc.org/new/publications/Technical Report/TR5/page 100-102(Heard).pdf Post-cephalic white spots melanocytes anomaly teratogeneic text ftciteseerx 2016-01-08T12:03:43Z This report documents a phenomenon in salmonids involving one or more white spots generally located in the mid-dorsal nape or occipital region immediately posterior of the fishes ’ head. The syndrome, post-cephalic white spot (PCWS), varies widely among populations. When present it often is found in less than 0.1 % of individuals in a population although in some instances occurrence rates can be considerably higher. This anomaly is easily overlooked and often goes unnoticed, especially when viewing a large number of fish. The white pigment spots, only a few millimeters in diameter in juveniles, grow allometrically and are larger in older fish. I first observed PCWS in juvenile sockeye salmon in 1975 (Fig. 1). These fish were progeny of adults from Nakvassin Creek at the west end of Port Herbert, a 4.8 km fiord on Baranof Island in Southeast Alaska. Adult salmon were collected and taken to the nearby National Marine Fisheries Service Field Station at Little Port Walter where they were spawned as part of a study to evaluate rearing of smolts in estuarine net pens (Wertheimer et al. 1983). Since first observing PCWS the anomaly has been found to occur in all five species of North American salmon, rainbow trout, Dolly Varden char, and Atlantic salmon. Documentation of these findings was accomplished through careful observations by myself and by the solicited assistance of many other individuals. Much of this information documents the presence of PCWS in 37 different populations of salmonids from Alaska, Washington, Oregon Text Atlantic salmon Alaska Unknown Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) Varden ENVELOPE(7.656,7.656,62.534,62.534)
institution Open Polar
collection Unknown
op_collection_id ftciteseerx
language English
topic Post-cephalic
white spots
melanocytes
anomaly
teratogeneic
spellingShingle Post-cephalic
white spots
melanocytes
anomaly
teratogeneic
William R. Heard
Post-Cephalic White Spot Syndrome in Salmonids
topic_facet Post-cephalic
white spots
melanocytes
anomaly
teratogeneic
description This report documents a phenomenon in salmonids involving one or more white spots generally located in the mid-dorsal nape or occipital region immediately posterior of the fishes ’ head. The syndrome, post-cephalic white spot (PCWS), varies widely among populations. When present it often is found in less than 0.1 % of individuals in a population although in some instances occurrence rates can be considerably higher. This anomaly is easily overlooked and often goes unnoticed, especially when viewing a large number of fish. The white pigment spots, only a few millimeters in diameter in juveniles, grow allometrically and are larger in older fish. I first observed PCWS in juvenile sockeye salmon in 1975 (Fig. 1). These fish were progeny of adults from Nakvassin Creek at the west end of Port Herbert, a 4.8 km fiord on Baranof Island in Southeast Alaska. Adult salmon were collected and taken to the nearby National Marine Fisheries Service Field Station at Little Port Walter where they were spawned as part of a study to evaluate rearing of smolts in estuarine net pens (Wertheimer et al. 1983). Since first observing PCWS the anomaly has been found to occur in all five species of North American salmon, rainbow trout, Dolly Varden char, and Atlantic salmon. Documentation of these findings was accomplished through careful observations by myself and by the solicited assistance of many other individuals. Much of this information documents the presence of PCWS in 37 different populations of salmonids from Alaska, Washington, Oregon
author2 The Pennsylvania State University CiteSeerX Archives
format Text
author William R. Heard
author_facet William R. Heard
author_sort William R. Heard
title Post-Cephalic White Spot Syndrome in Salmonids
title_short Post-Cephalic White Spot Syndrome in Salmonids
title_full Post-Cephalic White Spot Syndrome in Salmonids
title_fullStr Post-Cephalic White Spot Syndrome in Salmonids
title_full_unstemmed Post-Cephalic White Spot Syndrome in Salmonids
title_sort post-cephalic white spot syndrome in salmonids
url http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.561.4061
http://www.npafc.org/new/publications/Technical Report/TR5/page 100-102(Heard).pdf
long_lat ENVELOPE(-130.143,-130.143,54.160,54.160)
ENVELOPE(7.656,7.656,62.534,62.534)
geographic Sockeye
Varden
geographic_facet Sockeye
Varden
genre Atlantic salmon
Alaska
genre_facet Atlantic salmon
Alaska
op_source http://www.npafc.org/new/publications/Technical Report/TR5/page 100-102(Heard).pdf
op_relation http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.561.4061
http://www.npafc.org/new/publications/Technical Report/TR5/page 100-102(Heard).pdf
op_rights Metadata may be used without restrictions as long as the oai identifier remains attached to it.
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