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... Florida 32407 ROBERT S. JONES z Harbor Branch Foundation Fort Pierce, Florida 33450 AND KENNETH W. ABLE Rutgers University New Brunswick, New ... can-yons where other erosional processes such as slumping and turbidity currents also... more
... Florida 32407 ROBERT S. JONES z Harbor Branch Foundation Fort Pierce, Florida 33450 AND KENNETH W. ABLE Rutgers University New Brunswick, New ... can-yons where other erosional processes such as slumping and turbidity currents also occur, it has been ditt~cult to ...
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Research Interests: Environmental Science, Fisheries, Mass Spectrometry, Ecology, Sample Preparation, and 15 moreOtoliths, Isotopes, Otolith, Fish Migration, Aquaculture and fisheries, Laser Ablation, Fisheries Sciences, Sample Size, Inductively Coupled Plasma Mass Spectrometry, Isotope, Natural Variation, Chinook Salmon, High Spatial Resolution, Metapopulation Dynamics, and Oncorhynchus
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Abstract In August 1979 the submersible Nekton Gamma was used in coordination with the commercial fishing vessel Lori-L near Hudson Submarine Canyon to evaluate the performance of longline fishing gear. Tilefish Lopholatilus... more
Abstract In August 1979 the submersible Nekton Gamma was used in coordination with the commercial fishing vessel Lori-L near Hudson Submarine Canyon to evaluate the performance of longline fishing gear. Tilefish Lopholatilus chamaeleonticeps were observed in or entering burrows or hooked on longlines both near burrows and distant from them. Most hooked fish were in good condition; however, some fish were dead from gut hooking and dusky sharks Carcharinus obscurus occasionally took hooked fish on the bottom. Seventeen percent of the catch was lost, apparently when longlines were retrieved and hooks pulled free of fish in burrows. Although the longline moved very little on the bottom, tilefish were attracted from a wider area than that transected by the longline. Bait predation by starfish Astropectin sp. and crabs Cancer sp. and Acanthocarpus alexanderi resulted in 50% bait loss in 4 hours. Bait predation proceeded rapidly; all exposed baited hooks were preyed upon after 3 hours. Minimum soak time may be a...
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Research Interests: Zoology, Oceanography, Chemistry, Fisheries Science, Biology, and 6 moreEcology, Rockfish, Otolith, Fishery, Upwelling, and pelagic zone
... J. Nat. Hist. 12: 6899697. Cooper, RA & JR Uzmann. 1977. ... Mar. Geology 33: M67-M95. Paulson, AC 1978. On the commensal habits of Ptereleotris, Acanthuris, and Zebrasoma with fossorial Valenciennea and Page 7. Amblygobius.... more
... J. Nat. Hist. 12: 6899697. Cooper, RA & JR Uzmann. 1977. ... Mar. Geology 33: M67-M95. Paulson, AC 1978. On the commensal habits of Ptereleotris, Acanthuris, and Zebrasoma with fossorial Valenciennea and Page 7. Amblygobius. Copeia 1978: 168-169. ...
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Page 1. Environmental Biology of Fishes 39: 259-270,1994. OO 1994 Kluwer Academic Publishers. Printed in the Netherlands. Variations in the age and growth of yellowfin tuna larvae, Thunnus albacares, collected about the Mississippi River... more
Page 1. Environmental Biology of Fishes 39: 259-270,1994. OO 1994 Kluwer Academic Publishers. Printed in the Netherlands. Variations in the age and growth of yellowfin tuna larvae, Thunnus albacares, collected about the Mississippi River plume ...
Research Interests: Environmental Science, Ecology, Otolith, Mississippi River, Fisheries Sciences, and 15 moreFishery, Gulf of Mexico, Tuna, Albacore, Yellowfin Tuna, Larva, Age and growth, Microstructures, Growth rate, Plume, Linear Regression, Growth Curve, Mortality rate, Environmental biology of fishes, and temporal variation
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Gulf menhaden Brevoortia patronus and king mackerel Scomberomorus cavalla represent two widely different larval life history strategies: feeding on large and small prey, respectively. We back-calculated lengths at age for wild and... more
Gulf menhaden Brevoortia patronus and king mackerel Scomberomorus cavalla represent two widely different larval life history strategies: feeding on large and small prey, respectively. We back-calculated lengths at age for wild and laboratory-reared larvae of gulf menhaden and wild king mackerel using direct proportion procedures then constructed matrices of observed age (rows) by increment number (columns) for mean back-calculated lengths at age. The coefficient of variation (100±SD/mean) in length at age was greater for observed than for back-calculated length at age for both wild and laboratory-reared gulf menhaden and for king mackerel. Columns in the length-at-age matrix of wild gulf menhaden showed significant trends of increasing back-calculated length at age for older larvae, but the matrix for laboratory-reared fish did not. We suggest that size-selective mortality—the culling of slower-growing larvae—was the cause of the different error structures of observed and back-calculated lengths at age as well as of the increasing back-calculated lengths at age for older larvae in the matrix of wild gulf menhaden. Predation may have been the cause of size-selective mortality because wild larvae were exposed to predation and laboratory-reared larvae were not. Slopes of regressions of back-calculated length on observed age for columns of the matrices indicate the time trend and intensity of size-selective mortality; in wild gulf menhaden larvae, size-selective mortality began after hatching, reached a plateau at 5–8 d, then declined markedly after 14 d, which suggests that the influence of predation was mainly expressed during this period. Size-selective mortality caused average growth (mean back-calculated or observed length at age) to appear higher for both species, but especially for gulf menhaden, because the smallest larvae of a given age were removed. We adjusted back-calculated growth by removing the effect of size-selective mortality with analysis of covariance and estimated that the observed growth rate was 25% higher than the adjusted rate for wild gulf menhaden and 7% higher for wild king mackerel.
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This chapter evaluates the degree to which basic reef fish ecology can help reef fish managers by reviewing key aspects of the life history of groupers. Ranging in size from 25 cm to over 3 m, groupers occur mostly in shallow water, with... more
This chapter evaluates the degree to which basic reef fish ecology can help reef fish managers by reviewing key aspects of the life history of groupers. Ranging in size from 25 cm to over 3 m, groupers occur mostly in shallow water, with a few species occurring in depths as great as 300 m. They are important components of most reef fish fisheries, and are highly esteemed as food fishes that are very susceptible to nearly every type of fishing gear, a combination that is typically catastrophic for fish populations. In many cases, protection for grouper stocks is inadequate or nonexistent, and given their high value, rapid overfishing of groupers is common. As with most reef fishes, attempts at stock assessments and management of groupers are relatively recent, and data shortages hamper the ability to make informed management decisions. Numerous groupers travel to specific locations to form spawning aggregations and tend to spawn in early spring and summer, with a general trend toward later spawning with increasing latitude. Spawning activity in groupers is often correlated with lunar or semilunar rhythms and the groupers are usually considered to be protogynous hermaphrodites. Although primary males may occur in some species, juvenile groupers typically mature and function as females. Males are produced when adult females change sex. Thus, sex ratios tend to be female biased, although there is a great variation both among and within species. Simulated effects of protogyny on yield-per-recruit, stock biomass-per-recruit (SSBR), and other measures of reproductive capability suggest that protogynous species lose reproductive capacity more rapidly with increasing fishing and sustain reproductive failure at lower levels of fishing, as compared to gonochoristic species. Compensation through conservation of the numerical sex ratio, and through conservation of the cohort male biomass:fecundity ratio, result in reduced and eliminated effects of protogyny, respectively.
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To investigate entrapment of fishes, traveling intake water screens were sampled monthly in 1969 and 1970 at a steam electric power station near Crystal River, Florida. Samples contained 73 species representing 41 families; the majority... more
To investigate entrapment of fishes, traveling intake water screens were sampled monthly in 1969 and 1970 at a steam electric power station near Crystal River, Florida. Samples contained 73 species representing 41 families; the majority of individuals were juveniles or weak-swimming species. There was an inverse relationship between intake water temperature and catch. Highest mortalities occurred with the first cold temperatures of winter and later with lowest water temperatures. Comparison of catch-per-unit-effort during daylight and darkness in 1970 showed monthly catch-per-hour for dark sampling approximately equal to or greater than for light. Greatest disparities between day and night sampling occurred simultaneously with coldest water temperatures.
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... suggesting that the level of settlement and recruitment to the fishery is prin-cipally determined during the plank-tonic phase. ... Michael Rimmer (Queensland Department of Primary Industry), Larry McEachran (Texas Parks and... more
... suggesting that the level of settlement and recruitment to the fishery is prin-cipally determined during the plank-tonic phase. ... Michael Rimmer (Queensland Department of Primary Industry), Larry McEachran (Texas Parks and Wildlife), Terje Svaasand (Norway Institute of Marine ...
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Research Interests: Business, Zoology, Fisheries, Environmental Management, Biology, and 14 moreEcology, Fisheries Management, Protein Structure and Function, Environmental Resource Management, Fishing, United States, Fishery Management, Fisheries Sciences, Social Values, Ecosystem, Public Interest, Large Scale, Marine ecosystem, and Course of Action
We explored a range of potential low and high‐frequency environmental drivers of fishery production (landings) and catch‐per‐unit‐effort (CPUE) for northern and southern stocks of golden tilefish (Lopholatilus chamaeleonticeps), a... more
We explored a range of potential low and high‐frequency environmental drivers of fishery production (landings) and catch‐per‐unit‐effort (CPUE) for northern and southern stocks of golden tilefish (Lopholatilus chamaeleonticeps), a stenothermic species that prefers a narrow band of habitat along the continental shelf and upper slope of the eastern US. Random forest regression, a machine learning technique, was used to examine the impact of numerous and sometimes correlated environmental covariates. We used important random forest covariates to inform construction of a more parsimonious generalized additive mixed model for each data type and stock. We identified several potential environmental drivers of golden tilefish fishery and stock dynamics, including low‐frequency climate indices, oceanographic currents, and high‐frequency oceanographic conditions. Both Atlantic Multidecadal Oscillation (AMO) and North Atlantic Oscillation indices were associated with historical golden tilefish landings for the northern stock spanning 1915–2000 at lags of 7 and 3–4 years, respectively. CPUE for both stocks (north: 1995–2017, south: 1994–2018) was associated with the AMO and oceanographic currents. In addition, northern stock CPUE was negatively related to Labrador Current flow and positively related to northerly position of the Gulf Stream. Southern stock CPUE was associated with seasonal Florida Current transport, monthly sea surface temperatures, and latitude. Oceanographic currents and water temperature primarily influenced within‐year CPUE, indicating a potential effect on adult fish or fisher behavior. In contrast, low‐frequency climate indices were associated with CPUE and landings at lags of 3–7 years, indicating their primary impact was on recruitment strength.
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Research Interests: Genetics, Geography, Ecology, Endangered Species, Information Flow, and 15 morePopulation, Habitat, Land Use, Nature Conservation, Fisheries Sciences, Fishery, Risk factors, Sturgeon, Habitat Degradation, Risk Factors, North American, Acipenser, Endangered Species Act, Environmental biology of fishes, and Habitat Destruction
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Sidescan sonar can be an effective tool for the determination of the habitat distribution of commer cially important species. This technique has the advantage of rapidly mapping large areas of the seafloor. Sidescan images (sonographs)... more
Sidescan sonar can be an effective tool for the determination of the habitat distribution of commer cially important species. This technique has the advantage of rapidly mapping large areas of the seafloor. Sidescan images (sonographs) may also help to identify appropriate fishing gears for differ ent types of seafloor or areas to be avoided with certain types of gears. During
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... Vermilion snapper are epibenthic or pelagic macro-planktivores (Grimes 1978) that feed at a lower trophic level than the benthic predators, red ... DW Ahrenholz, D. R. Colby, GR Huntsman, CS Manooch, (NMFS), and WE Fahy, University of... more
... Vermilion snapper are epibenthic or pelagic macro-planktivores (Grimes 1978) that feed at a lower trophic level than the benthic predators, red ... DW Ahrenholz, D. R. Colby, GR Huntsman, CS Manooch, (NMFS), and WE Fahy, University of North Carolina, Institute of Marine Sci ...
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Research Interests: Biology and Lutjanidae
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... This demersal branchiostegid is known to occur over the outer continental shelf, shelfbreak and upper slope (Struhsaker, 1969; Grimes et aI., 1982; Chester et aI., 1984) in depths of 75-236 m (Ross and Huntsman, 1982), off the ...... more
... This demersal branchiostegid is known to occur over the outer continental shelf, shelfbreak and upper slope (Struhsaker, 1969; Grimes et aI., 1982; Chester et aI., 1984) in depths of 75-236 m (Ross and Huntsman, 1982), off the ... 1-255 Sebastian 25 Jun 1975 113-177 131-149 ...
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... Coastal species, like king mackerel, complete their life cycles in Gulf of Mexico shelf waters that are influenced by river ... August 2001 I www.fisheries.org I Fisheries ... Research findings are not totally in accord with the first... more
... Coastal species, like king mackerel, complete their life cycles in Gulf of Mexico shelf waters that are influenced by river ... August 2001 I www.fisheries.org I Fisheries ... Research findings are not totally in accord with the first element of the short food chain hypothe-sis, ie, it cannot be ...
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Abstract Aberrant otoliths, although uncommon, have been reported in many fish species. We examined sagittae, lapilli, and asterisci from 1,140 wild and 1,723 hatchery-reared juvenile red drums (Sciaenops ocellatus). Aberrant sagittae... more
Abstract Aberrant otoliths, although uncommon, have been reported in many fish species. We examined sagittae, lapilli, and asterisci from 1,140 wild and 1,723 hatchery-reared juvenile red drums (Sciaenops ocellatus). Aberrant sagittae were found in 20 hatchery-reared fish. These otoliths, which appeared to be formed from a conglomeration of small spheres, were composed of the vaterite polymorph of calcium carbonate instead of the aragonite polymorph normally found in sagittae. No internal ring structure was present; however, gross external morphological features were similar to normal sagittae. Affected red drums had one normal sagitta, and all lapilli and asterisci were normal. No abnormal sagittae were found in wild fish.
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1 A panel of scientists was convened by the Pacific States Marine Fisheries Commission for an intensive two day meeting to examine practical ways that the Pacific and North Pacific Fishery Management Councils (FMCs) could address two of... more
1 A panel of scientists was convened by the Pacific States Marine Fisheries Commission for an intensive two day meeting to examine practical ways that the Pacific and North Pacific Fishery Management Councils (FMCs) could address two of the recommendations recently made by the U.S. Commission on Ocean Policy. One theme addressed ways to move towards an ecosystem-based approach to fisheries management. The other theme addressed the role of science in fishery management Council decisions, how to strengthen that role, and whether to separate conservation issues (how many fish are appropriate to catch) from allocation issues (who gets to catch them). Recognizing that the process of incorporating ecosystem considerations into fishery management council decisions is an evolutionary one, the panel crafted a definition of ecosystem-based fishery management (EBFM), identified characteristics that were specific to an EBFM approach, and identified a process that would help the FMCs move forwar...
A panel of scientists was convened by the Pacific States Marine Fisheries Commission for an intensive two day meeting to examine practical ways that the Pacific and North Pacific Fishery Management Councils (FMCs) could address two of the... more
A panel of scientists was convened by the Pacific States Marine Fisheries Commission for an intensive two day meeting to examine practical ways that the Pacific and North Pacific Fishery Management Councils (FMCs) could address two of the recommendations recently made by the U.S. Commission on Ocean Policy. One theme addressed ways to move towards an ecosystembased approach to fisheries management. The other theme addressed the role of science in fishery management Council decisions, how to strengthen that role, and whether to separate conservation issues (how many fish are appropriate to catch) from allocation issues (who gets to catch them). Recognizing that the process of incorporating ecosystem considerations into fishery management council decisions is an evolutionary one, the panel crafted a definition of ecosystem-based fishery management (EBFM), identified characteristics that were specific to an EBFM approach, and identified a process that would help the FMCs move forward i...
The mission of the National Oceanic and Atmospheric Administration (NOAA) is to understand and predict changes in the Earth=s environment and to conserve and manage coastal and oceanic marine resources and habitats to help meet our... more
The mission of the National Oceanic and Atmospheric Administration (NOAA) is to understand and predict changes in the Earth=s environment and to conserve and manage coastal and oceanic marine resources and habitats to help meet our Nation=s economic, social, and environmental needs. As a branch of NOAA, the National Marine Fisheries Service (NMFS) conducts or sponsors research and monitoring programs to improve the scientific basis for conservation and management decisions. NMFS strives to make information about the purpose, methods, and results of its scientific studies widely available. NMFS = Pacific Islands Fisheries Science Center (PIFSC) uses the NOAA Technical Memorandum NMFS series to achieve timely dissemination of scientific and technical information that is of high quality but inappropriate for publication in the formal peerreviewed literature. The contents are of broad scope, including technical workshop proceedings, large data compilations, status reports and reviews, l...
To investigate entrapment of fishes, traveling intake water screens were sampled monthly in 1969 and 1970 at a steam electric power station near Crystal River, Florida. Samples contained 73 species representing 41 families; the majority... more
To investigate entrapment of fishes, traveling intake water screens were sampled monthly in 1969 and 1970 at a steam electric power station near Crystal River, Florida. Samples contained 73 species representing 41 families; the majority of individuals were juveniles or weak-swimming species. There was an inverse relationship between intake water temperature and catch. Highest mortalities occurred with the first cold temperatures of winter and later with lowest water temperatures. Comparison of catch-per-unit-effort during daylight and darkness in 1970 showed monthly catch-per-hour for dark sampling approximately equal to or greater than for light. Greatest disparities between day and night sampling occurred simultaneously with coldest water temperatures.