A5090705438- Marine and fisheries research
- Fish Ecology and Management Studies
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Marine animal studies overview
- Coral and Marine Ecosystems Studies
- Oceanographic and Atmospheric Processes
- Coastal and Marine Management
- Ichthyology and Marine Biology
- Ocean Acidification Effects and Responses
- Underwater Acoustics Research
- Fish Biology and Ecology Studies
- International Maritime Law Issues
- Geology and Paleoclimatology Research
- Plant Pathogens and Resistance
- Plant Virus Research Studies
- Geological Studies and Exploration
- Fatty Acid Research and Health
- Evolutionary Game Theory and Cooperation
- Indigenous Studies and Ecology
- Migration and Labor Dynamics
- Reproductive biology and impacts on aquatic species
- Ecosystem dynamics and resilience
Scripps Institution of Oceanography
2012-2021
University of California, San Diego
2011-2020
CSIRO Oceans and Atmosphere
1995-2014
Virginia Tech
2010
Commonwealth Scientific and Industrial Research Organisation
1994-2002
NOAA Pacific Marine Environmental Laboratory
2002
GTx (United States)
2000
Dalhousie University
1984-1986
Exploited deepwater (>500 m) species generally exhibit clear "K-selected" life-history characteristics markedly different from most shelf species: extreme longevity, late age of maturity, slow growth, and low fecundity. Many also aggregate on restricted topographic features such as seamounts, a consequence are notably unproductive, highly vulnerable to overfishing, have potentially little resilience overexploitation. Since 1964, fisheries contributed 800 000–1 000 t annually global marine...
The precautionary approach and collaborative governance must balance deep-ocean use protection.
Despite rapidly growing interest in deep-sea mineral exploitation, environmental research and management have focused on impacts to seafloor environments, paying little attention pelagic ecosystems. Nonetheless, indicates that mining will generate sediment plumes noise at the seabed water column may extensive ecological effects deep midwaters (1), which can extend from an approximate depth of 200 meters 5 kilometers. Deep midwater ecosystems represent more than 90% biosphere (2), contain...
Morphometric variation was used to examine the stock structure, in southern Australian waters, of deepwater marine teleost Hoplostethus atlanticus , orange roughy. Seven samples were collected from non‐spawning aggregations 1989–1990. Three also winter 1992, two main spawning site off eastern coast Tasmania (St Helens), and third other fishing ground south Tasmania. The 38 morphometric measurements taken each over 1300 fish size‐standardized by an allometric formula analysed univariate...
Abstract Acoustic survey methods are useful to estimate the distribution, abundance, and biomass of mesopelagic fish, a key component open ocean ecosystems. However, fish pose several challenges for acoustic estimation based on their small size, wide depth range, mixed aggregations, length-dependent reflectance, which differentiate them from larger epipelagic neritic these were developed. Foremost, there is strong effect swimbladder resonance, so surveys must incorporate...
Multifrequency 12, 38, and 120 kHz acoustics were used to identify the dominant fish groups around a deepwater (>600 m) seamount (a known spawning site for orange roughy, Hoplostethus atlanticus) by amplitude mixing of frequencies. This method showed three distinct acoustic groupings that corresponded fishes based on size swimbladder type: myctophids total length less than 10 cm, morids macrourids with lengths >30 roughy mean standard 36 cm. These caught in demersal pelagic trawls...
The oceanographic consequences of climate change are increasingly well documented, but the biological impacts this on marine species much less so, in large part because few long-term data sets. Using otolith analysis, we reconstructed historical changes annual growth rates for juveniles eight long-lived fish southwest Pacific, from as early 1861. Six show significant during last century, with pattern differing systematically depth. Increasing temperatures near ocean surface correlate...
Year-class success of both Atlantic cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) stocks in the northwest exhibits large-scale coherence low-frequency variability with apparent periodicities 10–20 yr. Several physical biological variables region exhibit similar periodicity. Multiple regression analysis indicates that year-class tends to be associated meteorological patterns offshore winds. Recruitment most from Scotian Shelf Georges Bank is negatively abundance 0-group mackerel,...
Unlike most eastern boundary currents, the Leeuwin Current off west coast of Australia flows poleward and is therefore warm, nutrient‐poor suppresses upwelling. As a result, waters Western are relatively oligotrophic. Primary productivity concentrations chlorophyll particularly low in summer, when water column stratified concentrated layer above nutricline at approximately 100 m depth. The phytoplankton blooms late autumn winter, coinciding with period strongest flow. bloom winter maintained...
A review of energy use and the life histories deep‐water demersal fishes suggests that there are two primary groups or guilds; those live dispersed over sea floor aggregate in association with topographic features like seamounts. Dispersed deep‐sea typically have a body plan designed for slow cruising ‘sit wait’ predation, characterized by very low stores metabolic rates. Scaled size, metabolism these was comparable to bathypelagic fishes. On other hand, aggregatory species robust morphology...
The stability of fishery population models often depends upon the form underlying stock–recruitment (SR) relationship, yet this relationship generally cannot be defined from actual data. I use a simple SR model to show that ability characterize both natural mortality (M) during prerecruit period, which is associated with species' fecundity[Formula: see text], and variability M. may readily determined in species low fecundities (e.g. higher vertebrates:[Formula: text]), even if M relatively...
By analysing recruitment time series for 14 stocks of northwest Atlantic fish, I have found consistent positive correlations in among within such species as cod (Gadus morhua), haddock (Melanogrammus aeglefinus), and herring (Clupea harengus). Significant are also often demersal, offshore-spawning (cod, haddock, redfish (Sebastes spp.)), these groups tends to be negatively correlated with that pelagic species, which spawn inshore (herring) or restricted waters (mackerel (Scomber scombrus))....
Abstract Koslow, J. A. 2009. The role of acoustics in ecosystem-based fishery management. – ICES Journal Marine Science, 66: 966–973. For more than half a century, has been leading tool stock assessment. Today, the need for management poses new challenges scientists: to assess ecological relationships exploited species with predators and prey predict potential effects climate variability change on recruitment. No research is likely prove as effective meeting these needs, if it properly...
Abstract Larval fish assemblages were sampled using replicated oblique bongo net tows along a five‐station transect extending from inshore (18 m depth) to offshore waters (1000 off temperate south‐western Australia. A total of 148 taxa 93 teleost families identified. Larvae Gobiidae and Blenniidae abundant inshore, while larvae pelagic reef‐dwelling families, such as Clupeidae, Engraulidae, Carangidae Labridae common in continental shelf waters. oceanic particularly Myctophidae,...
Abstract We examined the dominant patterns of variability in fish fauna southern C alifornia urrent based on a principal component ( PC ) analysis ooperative O ceanic F isheries I nvestigations ichthyoplankton data set, 1951–2008. Eighty‐six taxa were analyzed, including all ecologically species, both exploited and unexploited. The first three s accounted for 20.5, 12.4 6.8% variance data, respectively (total: 39.7%). Each was dominated by from particular adult or larval habitats. 1...
Fecundity of orange roughy in 1987–1989 adjusted for standard length (S.L.) varied significantly between New South Wales (42 787 eggs female −1 ) Australia (35 339 and east Tasmania (31 085 ). Only 10‐17% the variability fecundity eastern was explained by s.l . any year from 1987–1992. However, liver condition age fish, combination with ., 27% variation fecundity. declined fish over 60 years old. It also correlated lipid levels ovary, particular, triacylglycerol as a proportion total...