Fishery Bulletin articles from July 2000

Fishery Bulletin archives from July 2000

Distinction between silver hake (Merluccius bilinearis) stocks in U.S. waters of the northwest Atlantic based on whole otolith morphometrics.(Statistical Data Included)
July 1, 2000... Abstract.--A method for using whole otolith morphometrics to identify silver hake (Merluccius bilinearis) stocks in U.S. waters of the northwest Atlantic is described. Whole sagittal otolith morphometric variables of length, width, area,...

Effects of twine diameter and mesh size in the body of prawn trawls on bycatch in Gulf St. Vincent, Australia.(Statistical Data Included)
July 1, 2000... Abstract.--The influences on catches and bycatches due to 1) an increase in size of mesh and 2) a reduction in twine diameter in the body of prawn trawls were investigated in Gulf St. Vincent, Australia. Compared with a conventional trawl body...

A new approach to validation of periodicity and timing of opaque zone formation in the otoliths of eleven species of Lutjanus from the central Great Barrier Reef(*).(Statistical Data Included)
July 1, 2000... Abstract.--A model was proposed for validation studies of the periodicity and timing of growth checks on fish otolith sections, based on measurements of otolith radii around tetracycline (OTC) marks. Continuous variables were obtained by...

Sexual maturity, sex ratio, and size composition of swordfish, Xiphias gladius, caught by the Hawaii-based pelagic longline fishery.(Statistical Data Included)
July 1, 2000... Abstract.--Swordfish (Xiphias gladius) caught by the Hawaii-based pelagic longline fishery during March 1994-June 1997 were examined at sea by observers of the National Marine Fisheries Service, Southwest Region. Observers provided unbiased...

Larval development of red snapper, Lutjanus campechanus, and comparisons with co-occurring snapper species.(Statistical Data Included)
July 1, 2000... Abstract.--The larval development of red snapper, Lutjanus campechanus, is described from reared larvae and from specimens collected in the Gulf of Mexico (GOM). Snapper larvae are pelagic and are characterized by the following features: a deep...

Consequences of dispersal of subtropically spawned crevalle jacks, Caranx hippos, to temperate estuaries(*).(Statistical Data Included)
July 1, 2000... Abstract.--Caranx hippos spawn at subtropical and tropical latitudes, but some of their propagules are dispersed hundreds of kilometers north of Cape Hatteras into temperate waters of the western North Atlantic. The effect that this northward...

Revision of the genus Lepidopsetta Gill, 1862 (Teleostei: Pleuronectidae) based on larval and adult morphology, with a description of a new species from the North Pacific Ocean and Bering Sea.(Statistical Data Included)
July 1, 2000... Abstract.--The endemic North Pacific pleuronectid genus Lepidopsetta Gill is revised to include three species: L. bilineata (Ayres), L. polyxystra n. sp., and L. mochigarei Snyder. Adults of L. bilineata can be distinguished by a low gill-raker...

An alternative method for estimating bycatch from the U.S. shrimp trawl fishery in the Gulf of Mexico, 1972-1995.(Statistical Data Included)
July 1, 2000... Abstract.--Finfish bycatch taken by the U.S. Gulf of Mexico shrimp fishery is an important issue in the management of fisheries resources given the perceived high mortality of the different fish stocks taken as bycatch in the region. Bycatch...

Validation of annual growth increments in the otoliths of the lethrinid Lethrinus mahsena and the lutjanid Aprion virescens from sites in the tropical Indian Ocean, with notes on the nature of growth increments in Pristipomoides filamentosus.(Statistical Data Included)
July 1, 2000... Abstract.--The lutjanids Pristipomoides filamentosus and Aprion virescens and the lethrinid Lethrinus mahsena are commercially important demersal bank and deep slope reef fish from the central Indian Ocean. To obtain von Bertalanffy growth...

Age, growth, maturation, and protandric sex reversal in common snook, Centropomus undecimalis, from the east and west coasts of South Florida.(Statistical Data Included)
July 1, 2000... Abstract.--During 1986-91, we examined 2088 common snook, Centropomus undecimalis, captured in Jupiter and Lake Worth inlets and adjacent waters on the east coast of Florida and 1784 common snook captured in Tampa Bay on the west coast of...

Habitat associations of deep-water rockfishes in a submarine canyon: an example of a natural refuge.(Statistical Data Included)
July 1, 2000... Abstract.-A multidisciplinary assessment of benthic rockfishes (genus Sebastes) and associated habitats in deep water was conducted in Soquel Submarine Canyon, Monterey Bay, California. Rock habitats at depths to 300 m were identifed by using...

Long-distance movement of a Nassau grouper (Epinephelus striatus) to a spawning aggregation in the central Bahamas.
July 1, 2000... Smith (1972) first reported Epinephelus striatus (Nassau grouper) spawning aggregations. Since then, spawning aggregations from a few dozen individuals to perhaps 100,000 individuals have been reported from the Bahamas, Jamaica, Cayman Islands,...

Concurrent scavenging off a whale carcass by great white sharks, Carcharodon carcharias, and tiger sharks, Galeocerdo cuvier.
July 1, 2000... The great white shark, Carcharodon carcharias (Lamnidae), and the tiger shark, Galeocerdo cuvier (Carcharhinidae), are two of the largest species of macropredatory sharks. Both are known to prey on dolphins (Delphinidae) off KwaZulu-Natal,...

Validation of age estimates from otoliths of larval and juvenile spotted seatrout, Cynoscion nebulosus.(Statistical Data Included)
July 1, 2000... Otolith microstructure analysis has been shown to be valuable for relating biotic and abiotic factors to growth and survival (Crecco and Savoy, 1985; Thorrold and Williams, 1989; Maillet and Checkley, 1991; Jenkins et al., 1993) and determining...

Consumption of Pacific herring (Clupea pallasi) eggs by greenling (Hexagrammidae) in Prince William Sound, Alaska.(Statistical Data Included)
July 1, 2000... Predation is an important process regulating egg survival in marine systems (Bailey and Houde, 1989). Pacific herring (Clupea pallasi) spawn demersal adherent eggs on shallow subtidal and intertidal substrates. Consequently, their eggs are...