Topic
Fishing
About: Fishing is a research topic. Over the lifetime, 26543 publications have been published within this topic receiving 455552 citations. The topic is also known as: angling.
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TL;DR: The temporal coincidence of the shifts in lobster distribution with events such as the onset of reduced somatic growth and increased lobster walkouts suggests environmental forcing factors, as do congruent changes in other components of South Africa's Western Cape marine ecosystems.
Abstract: A major shift in resource availability in the West Coast rock lobster Jasus lalandii from the traditional fishing grounds on the West Coast to the more southern fishing grounds was observed between the late 1980s/early 1990s and the turn of the century. The contribution of the West Coast region to total lobster landings declined from about 60% to <10%, whereas in the southern region it increased from around 18% to 60% during that period. The early 1990s was also the start of a major influx of lobsters into the area east of Cape Hangklip, an area not previously associated with high lobster abundance. Whereas the 1990s was a period of change, the period 2000 to present has been one of relative stability in lobster catches. The ecological, fisheries and resource management implications of these shifts have been severe and are likely to cause challenges in the future management of both the rock lobster and abalone Haliotes midae resources. The temporal coincidence of the shifts in lobster distribution with ev...
96 citations
TL;DR: An estimable model of recreation behavior in which the recreation decision is cast as a dynamic programming problem is developed, illustrated with an application to salmon and trout fishing on Lake Michigan.
96 citations
01 Jan 1999
TL;DR: Trent et al. as discussed by the authors measured total mercury levels in four species of sharks from the Atlantic coast of Florida and found that methylmercury is the most toxic form of mercury for humans to consume.
Abstract: Florida’s commercial and recreational shark landings represent a significant portion of the total U.S. Atlantic shark landings (NMFS, 1993). Shark landings have increased significantly during the past decade because human consumption of shark meat has become increasingly acceptable and because, in Asian markets, the demand for shark fins is very high— as are the prices paid for them (NMFS, 1993; Brown, in press). The east-central coast of Florida is an important area for commercial and recreational shark fishing, and a wide array of shark species, including those examined in this study, are landed in this region (Trent et al., 1997; FDEP1). Mercury, a toxic metallic element, has been shown to bioaccumulate in fish tissue, and therefore, fish can represent a major dietary source of mercury to humans (Phillips and Buhler, 1978; Turner et al., 1980; Lyle, 1986). Methylmercury is the most toxic form of mercury for humans to consume (Meaburn, 1978; NMFS, 1993) and essentially all mercury found in fish muscle tissue (>95%) is in the monomethyl form (CH3Hg)(Grieb et al., 1990; Bloom, 1992). Therefore, the measurement of total mercury provides an approximation of Mercury levels in four species of sharks from the Atlantic coast of Florida
95 citations
Journal Article•
TL;DR: In this article, the authors evaluated the post-release survival of blue marlin from pelagic longline fishing gear in the western North Atlantic using satellite archival tags (PSATs) for both five days and thirty days.
Abstract: Blue marlin (Makaira nigricans) sup(MSY) and that current harvests are port commercial and recreational more than twice the replacement yield, fisheries throughout the tropical and further contributing to the decline of subtropical waters of the Atlantic the stock (ICCAT, 2001). A reduction in Ocean. The species is taken in directed fishing mortality of approximately 60% recreational and artisanal fisheries is needed simply to halt the decline in in several areas and constitutes an stock abundance (Goodyear, 2000). incidental catch of the widespread One means of reducing fishing mor commercial pelagic longline fishery. tality on blue marlin, without severely Although blue marlin comprise only a impacting catches of target species of small fraction of the catch of the pelathe pelagic longline fishery, is to release gic longline fishery that targets tunas those blue marlin that are alive at the and swordfish, this fishery accounts time longline gear is retrieved (hauled for the majority of fishing mortality back). Jackson and Farber (1998) reon Atlantic blue marlin (ICCAT, 1997; ported that 48% of blue marlin caught 2001). in the Venezuelan longline fishery are Atlantic blue marlin were last asalive at the time of haulback. Data from sessed in 2000 by the Standing Committhe U.S. observer program between tee for Research and Statistics (SCRS) 1992 and 1996 indicate that 66% of of the International Commission for the blue marlin were released alive from Conservation of Atlantic Tunas (ICthe domestic longline fishery (Lee and CAT). The assessment indicated that Brown, 1998) and U.S. National Marine the total biomass of Atlantic blue marFisheries Service (NMFS) data and lin is only about 40% of that necessary mandatory pelagic longline logbook to produce maximum sustainable yield submissions between 1987 and 1991 indicate that 59.8% of blue marlin are released alive from commercial pelagic longline gear (Cramer, 1998). ICCAT has been encouraging the release of live blue marlin for several years, and in 2000 the Commission mandated that all live blue marlin and white marlin be released from com mercial longline and purse seine ves sels. However, for such a management measure to significantly reduce fishing mortality, released animals must have a reasonably high postrelease survival rate. Little information exists about postrelease survival of blue marlin, espe cially of animals taken on pelagic longline gear. In general, recovery rates of billfish tagged with conventional (streamer) tags have been quite low (<2%; Jones and Prince, 1998; Ortiz et al., 1998). This observation is consis tent with high postrelease mortality, although low recovery rates could also result from tag shedding and a lack of reporting recovered tags (Bayley and Prince, 1994; Jones and Prince, 1998). Results of acoustic tracking studies of blue marlin captured on recreational gear suggest that postrelease survival over periods of a few hours to a few days is relatively high, although mortalities have been noted (reviewed in Pepperell and Davis, 1999). More recently, popup satellite archival tags (PSATs) have been used to study postrelease survival of blue marlin taken in a recreational fishery. Graves et al. (2002) attached nine PSATs to blue marlin caught on recreational gear off Bermuda. Eight of the tags detached from the animals and reported as expected after five days; net displacement and direction, tag incli nation, and temperature data for all eight individuals were consistent with postrelease survival for five days. In this note, we present the results of a study evaluating the postrelease survival of blue marlin from pelagic longline fishing gear in the western North Atlantic. We include analyses of the movement and behavior of these animals for tagging periods of both five days and thirty days.
95 citations