Influence of protogynous sex change on recovery of fish populations within marine protected areas

2020 ◽  
Vol 30 (3) ◽  
Author(s):  
E. E. Easter ◽  
M. S. Adreani ◽  
S. L. Hamilton ◽  
M. A. Steele ◽  
S. Pang ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Sex Change ◽  
Fish Populations ◽  
Protogynous Sex Change

Marine protected areas for deepwater fish populations: an evaluation of their effects in Hawai’i

2013 ◽  
Vol 161 (2) ◽  
pp. 411-425 ◽  
Author(s):  
Dana K. Sackett ◽  
Jeffrey C. Drazen ◽  
Virginia N. Moriwake ◽  
Christopher D. Kelley ◽  
Brett D. Schumacher ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Fish Populations

Links between sex change and fish densities in marine protected areas

2008 ◽  
Vol 141 (1) ◽  
pp. 187-197 ◽  
Author(s):  
Philip P. Molloy ◽  
John D. Reynolds ◽  
Matthew J.G. Gage ◽  
Iago Mosqueira ◽  
Isabelle M. Côté
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Sex Change

scholarly journals THE SURVIVAL OF TRANSPLANTED CORAL ON PYRAMID-SHAPED FISH SHELTER ON THE COASTAL WATERS OF KELAPA AND HARAPAN ISLANDS, KEPULAUAN SERIBU, JAKARTA

2012 ◽  
Vol 7 (1) ◽  
pp. 79
Author(s):  
Ofri Johan
Keyword(s):  
Mortality Rate ◽  
Protected Areas ◽  
Marine Protected Areas ◽  
Coastal Waters ◽  
Coral Species ◽  
Fish Population ◽  
Fish Populations ◽  
Live Coral ◽  
One Year ◽  
Base Of Pyramid

Research was carried out in August 2008 at two sites within Marine Protected Areas (MPA) in Kelapa and Harapan Islands of Seribu Islands, Indonesia. The purpose of this research was to compare the mortality rate of coral transplanted on the upper and base of pyramid-shaped concrete fish shelters. Fish shelters were placed on the seabed of Kelapa Island which is characterized by sandy seabed and Harapan Island which is characterized by silt. Both sites are within Marine Protected Areas. The survey recorded mortality rate of transplanted coral and percentage of live coral coverage. The research also sampled fish populations within the MPA sites and pyramid areas so that the two sites can be compared for their fish biodiversity. The data were analyzed by using T-Test Student of SPSS 11.5 computer program to compare between two locations, and upper and base of transplanted position. After one year, the average mortality rate among transplanted coral species in Kelapa Island was 34%. However, the mortality rate of transplanted coral in Harapan Island was slightly higher than in Kelapa Island: 42%. The transplanted coral at the top of the fish shelter had higher survival rate (39%) compared to the base of the fish shelter (24%). Fish populations in Kelapa Island consisted of 1,119 individuals from 35 species. This was much higher than in Harapan Island where the research found only 655 individuals from 27 species. Fish populations found around the fish  shelter area in Kelapa Island consisted of 125 individuals from 25 species. This was lower than the fish population in Harapan Island, where 206 individuals from 23 species were recorded.

scholarly journals Preventing overexploitation of migratory fish stocks: the efficacy of marine protected areas in a stochastic environment

2009 ◽  
Vol 66 (9) ◽  
pp. 1919-1930 ◽  
Author(s):  
Christopher D. West ◽  
Calvin Dytham ◽  
David Righton ◽  
Jonathan W. Pitchford
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Environmental Stochasticity ◽  
Fish Populations ◽  
Stochastic Environment ◽  
Migratory Fish ◽  
Deterministic Analysis ◽  
Fish Stocks ◽  
Harvest Control Rule ◽  
Stable Equilibria

Abstract West, C. D., Dytham, C., Righton, D., and Pitchford, J.W. 2009. Preventing overexploitation of migratory fish stocks: the efficacy of marine protected areas in a stochastic environment. – ICES Journal of Marine Science, 66: 1919–1930. Marine protected areas (MPAs) have been widely proposed for protecting overexploited fish populations. It has been suggested that fisheries may be enhanced by spillover of individuals from MPAs into fishing grounds. However, traditional spillover studies fail to account for the seasonal migrations of many populations. Most fisheries models also fail to include the stochasticity inherent in marine environments explicitly. Here we assess MPA efficacy using a simple population model simulating the migration of fish populations between a spawning ground MPA and a fishery. Including realistic environmental stochasticity in our model allows the population to deviate from, and shift between, positive stable equilibria, something that is impossible in a deterministic analysis. This deviation may result in population collapse in cases where deterministic analysis predicts population persistence. We show that, although effective at low migration levels, the ability of MPAs to protect stocks from collapse generally decreases as migration increases. However, an MPA provides greater protection and greater expected fisheries yield than a system without an MPA, irrespective of migration level. Combining MPAs with a harvest control rule may further increase protection and yield. We therefore argue that MPAs can play a role in the protection of migratory species.

Characterising essential breeding habitat for whales informs the development of large-scale Marine Protected Areas in the South Pacific

2016 ◽  
Vol 548 ◽  
pp. 263-275 ◽  
Author(s):  
RE Lindsay ◽  
R Constantine ◽  
J Robbins ◽  
DK Mattila ◽  
A Tagarino ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Large Scale ◽  
South Pacific ◽  
Breeding Habitat ◽  
The South
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