Fish Of The Marine Reserve

DOWNLOAD

Download Fish Of The Marine Reserve PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Fish Of The Marine Reserve book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page

Fish Of The Marine Reserve

DOWNLOAD
Author : Sue Thompson
language : en
Publisher:
Release Date : 1981

Fish Of The Marine Reserve written by Sue Thompson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Cape Rodney to Okakari Point Marine Reserve categories.

Fully Protected Marine Reserves

DOWNLOAD
Author : Callum M. Roberts
language : en
Publisher:
Release Date : 2000

Fully Protected Marine Reserves written by Callum M. Roberts and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Biodiversity conservation categories.

Plenty More Fish In The Sea

DOWNLOAD
Author : Madeleine Alderton
language : en
Publisher:
Release Date : 1994

Plenty More Fish In The Sea written by Madeleine Alderton and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Marine parks and reserves categories.

Effects Of Poor Knights Islands Marine Reserve On Demersal Fish Populations

DOWNLOAD
Author : Christopher Michael Denny
language : en
Publisher:
Release Date : 2003-10-01

Effects Of Poor Knights Islands Marine Reserve On Demersal Fish Populations written by Christopher Michael Denny and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-10-01 with Fish populations categories.

The Direct And Indirect Effects Of Marine Reserve Protection On Reef Fish Assemblages

DOWNLOAD
Author : Harry Allard
language : en
Publisher:
Release Date : 2020

The Direct And Indirect Effects Of Marine Reserve Protection On Reef Fish Assemblages written by Harry Allard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.

Marine reserves are established to protect marine ecosystems from fishing, allowing harvested fishes to recover: these are the "direct effects" of protection. However, changes may also occur among species not typically exposed to fishing mortality, via "indirect effects" . Most marine reserve studies have focused on direct effects, and the prevalence and relative importance of indirect effects is poorly understood. Understanding both direct and indirect effects is key to understanding how fishing affects wider fish assemblages. To investigate the direct and indirect effects of marine reserve protection on reef fish assemblages I examined monitoring data from four northeastern New Zealand marine reserves. This long-term analysis also provided a wider assessment of how reef fish have changed over the last 2-4 decades in this region. Across all reserves examined, the large predatory sparid Chrysophrys auratus responded strongly to protection. This response was hypothesised to drive indirect effects on other species, as a result of increased predation, competition, or predator-induced habitat changes. Long-term changes in reef fish assemblages in New Zealand's oldest marine reserve at Leigh suggested that along with direct effects on six targeted species, snapper recovery had indirect effects on three small-bodied non-target fishes and one herbivorous fish. Comparisons across three reserves revealed that the potential indirect effects identified in Leigh were not ubiquitous. While direct effects on target species like snapper and cheilodactylid Cheilodactylus spectabilis were largely predictable, potential indirect effects were more location-specific and difficult to differentiate from the effects of environmental gradients. At an offshore island marine reserve, with a more speciose temperate-subtropical fish fauna, potential indirect effects existed for just 3 wrasses, despite dramatic direct effects of protection on snapper. There was no evidence of tropicalisation of fish assemblages at this offshore island marine reserve over the last two decades. This study demonstrated that while protected fish assemblages are distinct, this is mostly driven by the recovery of harvested species. Potential indirect effects of long-term protection were identified, but were rarely consistent across multiple reserves. Trophic links between reef fishes appear weak, and the role of indirect effects is likely overwhelmed by the direct effects of fishing.

The Fishery Effects Of Marine Reserves And Fishery Closures

DOWNLOAD
Author : Fiona Rachel Gell
language : en
Publisher:
Release Date : 2003

The Fishery Effects Of Marine Reserves And Fishery Closures written by Fiona Rachel Gell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Coral reef conservation categories.

Describes and evaluates the use of marine reserves as a fishery management tool, and concludes that efficacy of this strategy is evidenced by increases in affected fish stocks, increases in affected fishes' biomass, increased catches in areas close to reserve boundaries (known as "fishing-the-line"), inter alia

Reef Fish Movements And Marine Reserve Designs

DOWNLOAD
Author : Nicholas Alexander Farmer
language : en
Publisher:
Release Date : 2008

Reef Fish Movements And Marine Reserve Designs written by Nicholas Alexander Farmer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.

Movement patterns and space use by mature fishes are critical in determining the effectiveness of marine reserves in conserving spawning stock biomass and/or providing biomass to adjacent fisheries through 1spillover2. Home range sizes, activity patterns, site fidelity and habitat preferences were determined for acoustically-tagged snappers and groupers using a rigorously-calibrated array of omnidirectional hydroacoustic receivers deployed in the diverse coral reef environments of a no-take marine reserve (NTMR) network in the Dry Tortugas, Florida. An individual-based localizing tendency model of reef fish movement was parameterized from fine-scale acoustic telemetry data and integrated into a Spatial Management Performance Assessment (SMPA) simulation model for reef fish populations developed to quantitatively evaluate performance of no-take marine reserves in the Dry Tortugas, Florida. Spatially-explicit SMPA models were parameterized for three overfished stocks in the lucrative snapper-grouper fishery: red grouper (Epinephelus morio), black grouper (Mycteroperca bonaci), and mutton snapper (Lutjanus analis). SMPA models were used to evaluate the impacts of a variety of life histories, movement strategies and speeds, and management regulations upon long-term stock sustainability, as measured by annual changes in spawning potential ratio (SPR), and long-term stock productivity, as measured by annual changes in fisheries yield-in-weight per recruit (Yw/R). Under assumptions of constant regional fishing pressure, constant recruitment, and 1realistic2 fish movement, SMPA simulation runs from initial conditions in 2000 suggested that by 2014, the Tortugas NTMR network should function to restore red grouper populations to 30% SPR, a Federal management benchmark for sustainability. Mutton snapper were the most mobile of the species investigated; if mutton snapper movements are ignored, their population is predicted to attain 30% SPR by 2014, but given 1realistic2 mobility, they may not attain this target by 2021 without additional protections. Black grouper are currently fished at over 9 times sustainable levels. SMPA simulations suggest coupling an increase in minimum size at capture of 20 6 25 cm with NTMR implementation would result in substantial short term losses in yield, but would restore both black grouper and mutton snapper populations to 30% SPR by 2021 and lead to increased long-term yields. Although marine reserve sites are often chosen opportunistically, these findings strongly suggest that reserve designs (e.g. proper sizes and configurations) must take into account the scales and patterns of movement exhibited by the exploited stocks they are intended to protect. These modeling efforts also suggested reserves are not a panacea; in order to promote sustainability for severely depleted stocks, they must be accompanied by an overall reduction in fishing capacity. Although important questions remain concerning the movements of reef fish in response to habitat and density dependent processes, our analyses of realistic reef fish behaviors suggest that the NTMRs of the Dry Tortugas promote substantial gains in SPR, promoting long-term stock sustainability and enhanced egg production. Increased rates of movement diminish these benefits, but may also mitigate short-term losses in yield associated with NTMR establishment.

Effects Of The Poor Knights Islands Marine Reserve On Demersal Fish Populations

DOWNLOAD
Author : Trevor John Willis
language : en
Publisher:
Release Date : 2000

Effects Of The Poor Knights Islands Marine Reserve On Demersal Fish Populations written by Trevor John Willis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Fish populations categories.

Early Life History Of Marine Fishes

DOWNLOAD
Author : Bruce Miller
language : en
Publisher: Univ of California Press
Release Date : 2009-06-10

Early Life History Of Marine Fishes written by Bruce Miller and has been published by Univ of California Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-10 with Science categories.

The life cycles of fishes are complex and varied, and knowledge of the early life stages is important for understanding the biology, ecology, and evolution of fishes. In Early Life History of Marine Fishes, Bruce S. Miller and Arthur W. Kendall Jr., bring together in a single reference much of the research available and its application to fishery science—knowledge increasingly important because for most fishes, adult populations are determined at the earliest stages of life. Clear and well written, this book offers expert guidance on how to collect and analyze larval fish data and on how this information is interpreted by applied fish biologists and fisheries managers.

Utility And Implications Of No Take Marine Reserves In Fishery Management Strategies

DOWNLOAD
Author : Carey R. McGilliard
language : en
Publisher:
Release Date : 2012

Utility And Implications Of No Take Marine Reserves In Fishery Management Strategies written by Carey R. McGilliard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Fish populations categories.

This work explores (1) the potential for using marine reserves to manage data-poor fish populations, (2) the potential for marine reserves to influence the performance of commonly used stock assessment approaches relative to alternative approaches that explicitly account for a marine reserve, and (3) hypotheses about the role of older females to population persistence and arguments that marine reserves are needed to maintain this role. In Chapter 1, the potential use of the ratio of the density of fish outside a marine reserve to that inside the reserve in a fishery management control rule (DRCR) is evaluated by Management Strategy Evaluation. The cumulative catch under the optimal DRCR was 90% of the cumulative catch from an optimal constant effort rule (CER). A small range of parameter values for the DRCR produced 75% or more of the cumulative catch produced from optimal CERs for a variety of assumptions about biology and initial stock status. The optimal DRCR was most sensitive to movement patterns of larvae and adults and survey variability. In Chapter 2, a simulation model was used to analyze the ability of several stock assessment approaches to estimate current biomass after the implementation of a marine reserve. Results show that assessing populations as a single stock without accounting for a no-take marine reserve and performing separate assessments for fished and protected areas can lead to severely biased estimates of biomass. An assessment approach which explicitly accounted for fish movement was robust to uncertainty in movement patterns. In Chapter 3, two popular hypotheses are modeled; one assumes that older mothers produce larger offspring capable of surviving longer starvation periods than offspring from younger mothers. The other modeled hypothesis is that mothers of different ages spawned in different times or locations. Recruitment variability was 55-65% lower than for control models in the absence of fishing and increased with increases in fishing mortality rates for both models. A marine reserve policy did not benefit measures of sustainability for either model.