Fishery Bulletin articles from January 2004

Fishery Bulletin archives from January 2004

The effects of size-selective fisheries on the stock dynamics of and sperm limitation in sex-changing fish.
January 1, 2004... Abstract--Fisheries models have traditionally focused on patterns of growth, fecundity, and survival of fish. However, reproductive rates are the outcome of a variety of interconnected factors such as life-history strategies, mating patterns,...

An environmentally based growth model that uses finite difference calculus with maximum likelihood method: its application to the brackish water bivalve Corbicula japonica in Lake Abashiri, Japan.
January 1, 2004... Abstract--We present a growth analysis model that combines large amounts of environmental data with limited amounts of biological data and apply it to Corbicula japonica. The model uses the maximum-likelihood method with the Akaike information...

Juvenile salmonid distribution, growth, condition, origin, and environmental and species associations in the Northern California Current *.
January 1, 2004... Abstract-Information is summarized on juvenile salmonid distribution, size, condition, growth, stock origin, and species and environmental associations from June and August 2000 GLOBEC cruises with particular emphasis on differences related to...

Spatial and temporal variation in the diet of the California sea lion (Zalophus californianus) in the Gulf of California, Mexico.
January 1, 2004... Abstract--Between June 1995 and May 1996 seven rookeries in the Gulf of California were visited four times in order to collect scat samples for studying spatial and seasonal variability California sea lion prey. The rookeries studied were San...

Recruitment and spawning-stock biomass distribution of bay anchovy (Anchoa mitchilli) in Chesapeake Bay *.
January 1, 2004... Abstract--Recruitment of bay anchovy (Anchoa mitehilli) in Chesapeake is related to variability in hydrological conditions and to abundance and spatial distribution of spawning stock biomass (SSB). Midwater-trawl surveys conducted for six...

Coupling ecology and economy: modeling optimal release scenarios for summer flounder (Paralichthys dentatus) stock enhancement.
January 1, 2004... Abstract--Increasing interest in the use of stock enhancement as a management tool necessitates a better understanding of the relative costs and benefits of alternative release strategies. We present a relatively simple model coupling ecology...

Sex-specific growth and mortality, spawning season, and female maturation of the stripey bass (Lutjanus carponotatus) on the Great Barrier Reef.
January 1, 2004... Abstract--Sex-specific demography and reproductive biology of stripey bass (Lutjanus carponotatus) (also known as Spanish flag snapper, FAO) were examined at the Palm and Lizard island groups, Great Barrier Reef(GBR). Total mortality rates were...

Examination of the foraging habits of Pacific harbor seal (Phoca vitulina richardsi) to describe their use of the Umpqua River, Oregon, and their predation on salmonids.
January 1, 2004... Abstract--The increase in harbor seal (Phoca vitulina richardsi) abundance, concurrent with the decrease in salmonid (Oncorhynchus spp.) and other fish stocks, raises concerns about the potential negative impact of seals on fish populations....

Larval development of the sidestriped shrimp (Pandalopsis dispar Rathbun) (Crustacea, Decapoda, Pandalidae) reared in the laboratory.
January 1, 2004... Abstract--Larval development of the sidestriped shrimp (Pandalopsis dispar) is described from larvae reared in the laboratory. The species has five zoeal stages and one postlarval stage. Complete larval morphological characteristics of the...

Sources of age determination errors for sablefish (Anoplopoma fimbria) *.
January 1, 2004... Abstract--This study was undertaken to resolve problems in age determination of sablefish (Anoplopoma fimbria). Aging of this species has been hampered by poor agreement (averaging less than 45%) among age readers and by differences in assigned...

Growth, mortality, and hatchdate distributions of larval and juvenile spotted seatrout (Cynoscion nebulosus) in Florida Bay, Everglades National Park.
January 1, 2004... Abstract--Life history aspects of larval and, mainly, juvenile spotted seatrout (Cynoscion nebulosus) were studied in Florida Bay, Everglades National Park, Florida. Collections were made in 1994-97, although the majority of juveniles were...

Age determination and growth of the night shark (Carcharhinus signatus) off the northeastern Brazilian coast.
January 1, 2004... Abstract--Age and growth of the night shark (Careharhinus signatus) from areas off northeastern Brazil were determined from 317 unstained vertebral sections of 182 males (113 215 cm total length [TL]), 132 females (111.5-234.9 cm) and three...

Distribution and biology of prowfish (Zaprora silenus) in the northeast Pacific.
January 1, 2004... Abstract--The prowfish (Zaprora silenus) is an infrequent component of bottom trawl catches collected on stock assessment surveys. Based on presence or absence in over 40,000 trawl catches taken throughout Alaskan waters southward to southern...

Fish lost at sea: the effect of soak time on pelagic longline catches.
January 1, 2004... Abstract--Our analyses of observer records reveal that abundance estimates are strongly influenced by the timing of longline operations in relation to dawn and dusk and soak time--the amount of time that baited hooks are available in the water....

Effects of density-dependence and sea surface temperature on interannual variation in length-at-age of chub mackerel (Scomber japonicus) in the Kuroshio-Oyashio area during 1970-1997.
January 1, 2004... Abstract--Annual mean fork length (FL) of the Pacific stock of chub mackerel (Scomber japonicus) was examined for the period of 1970-97. Fork length at age 0 (6 mouths old) was negatively correlated with year-class strength which fluctuated...

Latitudinal and seasonal egg-size variation of the anchoveta (Engraulis ringens) off the Chilean coast.
January 1, 2004... The anchoveta Engraulis ringens is widely distributed along the eastern South Pacific (from 4[degrees] to 42[degrees]S; Serra et al., 1979) and it has also supported one of the largest fisheries of the world over the last four decades. However,...

Molecular methods for the genetic identification of salmonid prey from Pacific harbor seal (Phoca vitulina richardsi) scat.
January 1, 2004... Twenty-six stocks of Pacific salmon and trout (Oncorhynchus spp.), representing evolutionary significant units (ESU), are listed as threatened or endangered under the Endangered Species Act (ESA) and six more stocks are currently being...

Diel vertical migration of the bigeye thresher shark (Alopias superciliosus), a species possessing orbital retia mirabilia.
January 1, 2004... The bigeye thresher shark (Alopias superciliosus, Lowe 1841) is one of three sharks in the family Alopiidae, which occupy pelagic, neritic, and shallow coastal waters throughout the tropics and subtropics (Gruber and Compagno, 1981; Castro,...