An ecosystem approach to global assessment and management of coastal waters

Sherman, Kenneth; Duda, Alfred M.

doi:10.3354/meps190271

Cited by 127 publications

(59 citation statements)

References 15 publications

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“…This rationale could be extended to estimate recruitment at the subpopulation level. Lower likelihoods of occurrence in southern locations, as depicted in the American eel AquaMap (figure not shown), is consistent with the field data indicating that the mean catch of American eel leptocephali per unit effort in the Gulf Stream system increases dramatically northward from the Straits of Florida with the greatest concentrations occurring in the Canadian Maritime provinces and the American north Atlantic region Sherman and Duda (1999) from Maine to Virginia (Kleckner and McCleave 1982). Based on an ecosystems approach, American eel distribution could be represented by seven LME (Fig.…”

Section: Defining Subpopulationssupporting

confidence: 74%

“…4). These LME are regions of ocean space (*200,000 km 2 ) encompassing coastal areas from river basins and estuaries out to the seaward boundaries of continental shelves and the outer margins of coastal current systems characterized by distinct bathymetry, hydrography, productivity, and trophically dependent populations (Sherman and Duda 1999;Duda and Sherman 2002). Due to the role that environmental factors have in the life history and movement patterns of American eel, the factors characterizing each LME will be important determinants of the likelihood of occurrence of American eel subpopulations with distinct demographic characteristics.…”

Section: Defining Subpopulationsmentioning

confidence: 99%

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A synthesis of the ecological processes influencing variation in life history and movement patterns of American eel: towards a global assessment

Vélez‐Espino

Koops

2009

Rev Fish Biol Fisheries

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American eel, Anguilla rostrata, is a catadromous fish that spawns in the Sargasso Sea and migrates to coastal waters and freshwater systems ranging from Greenland down the Atlantic coast to South America and has been regarded as comprising a panmictic population. American eel is in decline across much of its range. Research and management is primarily conducted at local to regional scales, yielding inconsistent research results and management recommendations that may be inhibited by large-scale processes. We review the research on American eel ecology demonstrating that its variable life history and movement patterns can be explained based on: (1) latitudinal productivity gradients; (2) ideal free habitat selection; (3) conditional evolutionarily stable life history strategies; (4) size at arrival to the coast (correlated with distance from the spawning grounds); and, (5) temperature variance and annual degree-day effects on somatic growth. Using these ecological processes, we outline how local and largescale effects on American eel dynamics can be integrated in a panmictic (or quasi-panmictic) modelling framework to enable defensible predictions of population responses to anthropogenic and oceanic phenomena. Due to its widespread distribution and existing knowledge gaps, the conservation and management of American eel will require international cooperation.

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Section: Defining Subpopulationssupporting

confidence: 74%

Section: Defining Subpopulationsmentioning

confidence: 99%

A synthesis of the ecological processes influencing variation in life history and movement patterns of American eel: towards a global assessment

Vélez‐Espino

Koops

2009

Rev Fish Biol Fisheries

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“…Therefore, it is obvious that immediate action is certainly needed by turning to more effective management strategies, particularly in coastal waters (Sherman and Duda, 1999). The creation of marine harvest refuges (cf.…”

Section: Discussionmentioning

confidence: 99%

Exploitation patterns of <i>Octopus vulgaris</i> in two Mediterranean areas

Tsangridis¹,

Sánchez²,

Ioannidou³

2002

Sci. Mar.

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SUMMARY: Exploitation patterns of the common octopus, Octopus vulgaris, in two Mediterranean areas were studied in three ports, two in the Thracian Sea (Greece, Eastern Mediterranean) and one in the Catalan Sea (Spain, Western Mediterranean). The study period of one year (July 1998-June 1999) included a monthly collection of data on commercial landings, fishing effort and length distribution of O. vulgaris. Many gears exploit this species in both areas. Specialised and highly productive artisanal gears (fyke nets, pots and traps) have been developed. Herein it is shown that: (1) trawls are responsible for most octopus landings; (2) trawls exploit mostly the small and immature individuals while the artisanal fleets exploit the large and mature ones; (3) there is a marked seasonality of catches; (4) there is little or no interaction between the gears fishing octopus, indicating that each gear affects a certain size range; (5) and the octopus specimens from the Greek area are clearly smaller than the ones from the Spanish area. Our results suggest that octopus fisheries require more effective management strategies. The creation of marine harvest refuges may be beneficial.

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“…In the North Sea, 2 main regions were distinguished: a shallow tidally mixed region in the southeast, and to the north a deeper and stratified area in summer. Human activities may alter biodiversity in the marine realm through overexploitation, eutrophication, pollution (Omori et al 1994, Sherman & Duda 1999 or indirectly by the effects of global warming on large-scale oceanic circulation. Poor knowledge of spatial patterns of biodiversity, however, has limited our assessment of this change.…”

mentioning

confidence: 99%