Fishery Bulletin articles from October 1 2008

Fishery Bulletin archives from October 1 2008

An assessment of discard mortality for two Alaskan crab species, Tanner crab (Chionoecetes bairdi)and snow crab (C. opilio), based on reflex impairment.(Report)
October 1, 2008... Abstract--Delayed mortality associated with discarded crabs and fishes has ordinarily been observed through tag and recovery studies or during prolonged holding in deck tanks, and there is need for a more efficient assessment method....

Fishes associated with pelagic Sargassum and open water lacking Sargassum in the Gulf Stream off North Carolina.(Report)
October 1, 2008... Abstract--The community structure of fishes associated with pelagic Sargassum spp. and open water lacking Sargassum was examined during summer and fall cruises, 1999-2003, in the Gulf Stream off North Carolina. Significantly more individual...

Evidence of hook competition in longline surveys.(Report)
October 1, 2008... Abstract--Catch rates from surveys are used as indices of abundance for many fish species. Relative abundance estimates from surveys with longline gear do not usually account for possible effects of gear saturation, which potentially creates...

Age validation of Dover sole (Microstomus pacificus) by means of bomb radiocarbon.(Report)
October 1, 2008... Abstract--We used bomb radiocarbon ([sup.14]C) in this age validation study of Dover sole (Microstomus pacificus). The otoliths of Dover sole, a commercially important fish in the North Pacific, are difficult to age and ages derived from the...

A 4500-year time series of Pacific cod (Gadus macrocephalus) size and abundance: archaeology, oceanic regime shifts, and sustainable fisheries.(Report)
October 1, 2008... Abstract--A 4500-year archaeological record of Pacific cod (Gadus macrocephalus) bones from Sanak Island, Alaska, was used to assess the sustainability of the modern fishery and the effects of this fishery on the size of fish caught. Allometric...

Prevalence of the commensal barnacle Xenobalanus globicipitis on cetacean species in the eastern tropical Pacific Ocean, and a review of global occurrence.(Report)
October 1, 2008... Abstract--Distribution and prevalence of the phoretic barnacle Xenobalanus on cetacean species are reported for 22 cetaceans in the eastern tropical Pacific Ocean (21 million [km.sup.2]). Four cetacean species are newly reported hosts for...

Onshore-offshore distribution and abundance of tuna larvae (Pisces: Scombridae: Thunnini) in near-reef waters of the Coral Sea.(Report)
October 1, 2008... Abstract--The on-offshore distributions of tuna larvae in near-reef waters of the Coral Sea, near Lizard Island (14[degrees]30'S, 145[degrees]27'E), Australia, were investigated during four cruises from November 1984 to February 1985 to test...

Habitat and bycatch effects on population parameters of inshore lizardfish (Synodus foetens) in the north central Gulf of Mexico.(Report)
October 1, 2008... Abstract--We examined the effect of habitat and shrimp trawl bycatch on the density, size, growth, and mortality of inshore lizardfish (Synodus foetens), a nonexploited species that is among the most widespread and abundant benthic fishes in...

Effects of rapid decompression and exposure to bright light on visual function in black rockfish (Sebastes melanops) and Pacific halibut (Hippoglossus stenolepis).(Report)
October 1, 2008... Abstract--Demersal fishes hauled up from depth experience rapid decompression. In physoclists, this can cause overexpansion of the swim bladder and resultant injuries to multiple organs (barotrauma), including severe exophthalmia ("pop-eye")....

Changes in a benthic megafaunal community due to disturbance from bottom fishing and the establishment of a fishery closure.(Report)
October 1, 2008... Abstract--Trawling and dredging on Georges Bank (northwest Atlantic Ocean) have altered the cover of colonial epifauna, as surveyed through in situ photography. A total of 454 photographs were analyzed from areas with gravel substrate between...

Pelagic behavior of adult Greenland halibut (Reinhardtius hippoglossoides).(Report)
October 1, 2008... Abstract--It is evident from several field experiments with vertical longlines and archival tags, as well as concurrent studies of predator-prey relationships, that adult specimens of the deep-water flatfish Greenland halibut (Reinhardtius...

All their eggs in one basket: a rocky reef nursery for the longnose skate (Raja rhina Jordan & Gilbert, 1880) in the southern California Bight.(Report)
October 1, 2008... Skates (family Rajidae) are oviparous and lay tough, thick-walled eggs. At least some skate species lay their eggs in spatially restricted nursery grounds where embryos develop and hatch (Hitz, 1964; Hoff, 2007). After hatching, neonates may...

Microsatellite primers for red drum (Sciaenops ocellatus).(Report)
October 1, 2008... In this note, we document polymerase-chain-reaction (PCR) primer pairs for 101 nuclear-encoded microsatellites designed and developed from a genomic library for red drum (Sciaenops ocellatus). Details of the genomic library construction, the...