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86 Cards in this Set
- Front
- Back
5 things that affect marine reserve design
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location
size shape number human dimension and regulations |
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What are characteristics that affect location
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habitat types (1 or more?)
Oceanographic features that link habitat ecological important areas (spawning) potential for recovery how vulnerable it is what activities surround it perceptions of people opportunities that will result from it |
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What are two types of open ocean reserves
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seamount
epipelagic |
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What is special about seamounts
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biological hotspots
intercept currents sediment free? complex communities endemism localized upwelling |
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island wake effect
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currents hitting seamount will upwell
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why is the epipelagic zone important
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it is where more fishing occurs
upwelling occurs which affects all trophic levels |
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Challenges with open ocean reserves
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life cycles occur in different areas
ghost fishing open ocean is dynamic enforcement problems Who owns the benthos? |
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ghost fishing
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not allowing certain types of fishing, but in the end what is allowed will end up doing damage too
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Two types of seamount conservation
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no trawl mpas
reserves |
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Considerations for epipelagic conservation
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dynamic boundaries
size follow fish using current and use that as the means to define where fishing is not allowed |
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what is important about the size of a mpa
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that it is large enough to conserve large populations as an insurance for catastrophes
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species-area curve
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the greater the area, the more species you conserve. However it is logrithmic, so at 50% you can conserve 90% of species. 10% can conserve 50% of species
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Explain the case study of the Hawaiian islands and species area curves
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the NW Hawaiian islands which has the largest protected area, has the largest biomass, where open fisheries have the least biomass
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Minimum Dynamic Area
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Reserves should be larger than MDA or the smallest area that would hold an array of habitat patches representative of different stages of distribution and ecological succession
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What is the most important factor to consider in shape
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area to perimeter ratio
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What is an ideal shape for a reserve
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a circle because the inside is protected much more and minimizes area exposed to threats
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What kind of edge is easiest to enforce
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straight edges
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Which is better, several small or one large MPA?
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It is debatable but the general idea is a network of several small
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What is the benefits of one large MPA
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protecting lots of habitat
large area bigger populations large species coverage less cost |
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problems with large MPAS
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socioeconomic conflicts
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resident self-replenishing population
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sensitive to habitat changes from outside stressors
does not have as much interaction with other populations, so it relies upon its resident population for replenishment |
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what is important in considering resident self-replenishing populations
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protecting the right area
ex: pacific and altantic overfish shell spps |
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Migratory self-replenishing populations
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have significant transfer with outside and inside MPAs
requires more of the population to be protected in order to see recovery |
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ex of protecting a migratory self-replenishing population
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atlantic cod:
less than 40% --> no prevent collapse 50 - 60% ---> slow collapse 80% --> helped protect |
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Ontogenetically disjunct populations
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Age classes live in different locations
protect dispersal cooridors and habitat for feeding and spawning grounds |
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Ex of trying to protect ontogentic disjunt population
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Nassau grouper in Mexico
the spawning ground was protected, but fishing intensity was allowed to increase on the coordidor and with more specialized gear. As a result the grouper would not make it to the spawning ground and moved it before the cooridor |
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Metapopulation
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population of populations
interact with each other larval dispersal and migration |
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rescue effect
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one population gives surplus to another with too little
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Source
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increased quality in habitat increase population and surpluses
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Sink
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receives recruits
lower quality habitat |
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Important of source and since habitats
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if the source is harmed, so will be the sinks
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Explain the ex of puerto penacasa, gulf of california
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Fishermen helped set up a network of protected area for scallops and black murex in 2002. They used science advice.
One set up where they were abundant, one where moderately abundant, one heavily fished 2004 increase benefits and populations 2007 rights given to local fishermen |
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restoration
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the act of returning something to its original state or fixing something that is damaged
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problems with def of restoration
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what we determine is an "original form"
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what is a consequence and problem with restoration
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that it is used to justify approving destructive actions
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goal of restoration
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to replace what's been lost
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4 approaches to restoration
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indiv sp
group of interacting orgs ecosystem interconnected biotopes |
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top 5 reasons for marine conservation
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1. pollution
2. overfishing 3. habitat loss 4. invasive species 5. global climate change |
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What is the aim of maximum sustainable yield
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the acheive the maximum amount of resource extraction without depleting the resources from one harvest to the next
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what is the aim of ecosystem based management
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harvest to minimize the impact on ecosystems and ecological processes
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what is terrestrial conservation driven by?
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reactive management
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Why do ecosystem based management
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better value: cost is approximatley same for single spps vs an entire system
single species closure does not work because the cause of decline is rooted in the effort to catch other spp Ecosystem takes into account species that are ecological important but may not be as important to fisheries Lack of knowledge in single sp biology makes it hard to conserve because we do not know the ecological processes that will lead to their recovery |
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Definition of MPAs
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any area of intertidal or subtidal terrain together with its overlying water and associated flora, fauna, historical, and cultural features, which has been reserved by law or other effective means to protect part of all of the enclosed environment
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Who typically has the authority for enforcement in MPAs
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managing government agency
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Difference between mpas and reserves
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MPAs will allow activities but not in reserves
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How many MPAs and what area of the world do they cover
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4500 MPAs
0.5 to 0.6 % of ocean size of Lake Victoria |
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Why MPAs?
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1. example of important habitats and ecosystems
2. need in order to sustain fisheries 3. increase species diversity 4. location of increased biological activity 5. natural wonder = tourism 6. critical habitat for particular species 7. cultural value 8. protects the coasts from storms 9. facilitates research to create baseline conditions |
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McClanahan 1999 on effectiveness of MPAs
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most MPAs are small and 9% are adequately managed
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McArdle 1997 on mpa effectiveness
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protection is variable
less than 0.2 percent is closed to all forms of fishing little enforcement |
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Marine reserves
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an area of the sea in which all consumptive and extractive uses are prohibited and other human interference is minimized as much as possible
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coverage of mpas
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0.01% which is 1/2 the area of lake victoria
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Marine reserves and science
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they are being set up but not studied
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what is the goal of marine reserves
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increase abundance and diversity of marine life inside the reserve
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Spillover effect
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when competition is high within the reserve, then there will be a spill over of adults into adjacent waters which are allowed for fishing
there is also a larval spillover effect with larval being transported out of the reserve |
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marine reserves and bofffs
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by being protected it increases bofffs
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Ecological benefits of MRs
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1. increase in size of indv
2. increase in numbers 3. larval export benefits other areas 4. spillover of adults 5. decrease catch per unit effort 6. habitat changes for better ecosystem 7. community effects (increase biod) 8. synergistic effects (increased resilience) |
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examples of how MPAs increase size of indiv
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Exuma Cays Land and Sea Park in the Bahamas
increased biomass of nassau grouper and conch Jardines de la Reina in Cuba and Glover's Reef in Belize increase biomass inside and outside for lobsters and fish Soufriere marine management area in St. Lucia increased catch per unit effort |
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What area is evidence for the spillover effect
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Apo Island Phillipines
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Evidence for mpas changing habitat
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decrease in algae in Tasmania
Anacapa Island Reserve, CA reserve regulated urchins and increased kelp |
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evidence for synergistic effects
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increased post-bleaching recovering in the Caribbean because of parrotfish
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Which species resonds the most to mpas
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large target spp but it is slow to see
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do all species benefit from mpas?
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no because are preyed upon more
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Social and economic benefits of mpas
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reserve money is a subsidy for fisheries
tourism cultural value preserved increased fish for fisheries research |
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Time for effect depends upon
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available breeding adults
growth rates age number and timing of spawning proximity of source population to reserve interactions human impacts level of enforcement |
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Factors that increase marine reserve success
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-size
-space -larval availability -clear goals -support from institutions and legislation to create enforcement -support community decision-making -involve people with diverse interests -include science advice -conflict resolution measures -sustainable finance -fishermen need alternate source of income -equitable share in economic profits -fair enforcement |
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Explain the cascading effects seen in Anacapa Marine reserve
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Lobsters increased as a consequence of the reserve and were able to eat urchins, keeping kelp plentiful
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what are the 3 main benefits of marine reserves
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increase size, abundance, and biomass
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explain ban and vincent's concept of fishing areas
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designate areas where fishing is allowed
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5 challenges to designating a fishing permitted area
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understanding the connectedness of fish and unfished areas
current fisheries could gain little benefit Accounting for outside effects designating fishing areas could make people not want to conserve anymore habitat if fishing areas will be more successful than current reserves |
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4 benefits of a global mpa as described by Balmford
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keep global fisheries catch sustainable
sustain ecosystem services global mpas created for less than the current subsidies create 1 million jobs |
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Ecological restoration
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act of returning to its original state
fixed something that is damaged return to supposed original form |
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remember shifting baseline syndrome
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k
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Problems concerning ecosystem restoration
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assume things can be repaired
implies we fully understand all ecological processes policy makers use it as a means to justify destructive actions |
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Look @ coral reefs table in reading
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done
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transplanting and reattachement
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following a disturbance dislodged organisms are replaced
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where is transplantation and reattachment successful
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in areas of limited larval supply
high recruit mortality and where large coral frags are available success limited |
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coral cultivation and larval seeding
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experimental bioassays used to monitor and grow coral in aquarium
usually uses brooders that realease fully developed planuae |
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artificial reef benefits
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coastal protection
fishing enhancement diving attraction wave break |
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questions for artificial reef creation
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what materials are suitable for recovery
will structure leach metals and toxins will structure cause further damage will aggregating species be exploited? |
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EXs of artificial reefs
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reef balls
electromagnetics wrecks and piers |
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What types of organisms recover fastest in reserves?
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short-lived fast regenerating species
longer life histories take a longer period of time |
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Relate size of reserves and population recovery
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Larger reserves will have a higher probability of protecting more self-sustaining populations
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What is a problem with population persistence in marine reserves
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it is unknown for many spp how many offspring are retained locally
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What is he problem with CPUEs
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They are insensitive to exploitation
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Unique about seamount species
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high endemism
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What is a problem for epipelagic reserves
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who protects the marine reserve if it is international waters
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