Relationships between Fishing Pressure and Stock Structure in Queen Conch (Lobatus gigas) Populations: Synthesis of Long-Term Surveys and Evidence for Overfishing in The Bahamas

@article{Stoner2018RelationshipsBF,
  title={Relationships between Fishing Pressure and Stock Structure in Queen Conch (Lobatus gigas) Populations: Synthesis of Long-Term Surveys and Evidence for Overfishing in The Bahamas},
  author={Allan W. Stoner and Martha H. Davis and Andrew S. Kough},
  journal={Reviews in Fisheries Science \& Aquaculture},
  year={2018},
  volume={27},
  pages={51 - 71}
}
Abstract Broad-scale surveys for the economically valuable gastropod queen conch in historically important fishing grounds of the Bahamian archipelago provide opportunity to explore the impact of variable fishing intensity on population structures. Visual surveys spanning two decades showed that densities of mature individuals had a significant negative relationship with an index of fishing pressure (FP). Average shell length in a population was not related to FP, but shell lip thickness (an… 
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References

SHOWING 1-10 OF 100 REFERENCES
Abundance and population structure of queen conch inside and outside a marine protected area: repeat surveys show significant declines
TLDR
Results show that the LSI population is being overfished and the WW population is senescing because of low recruitment, and sustainable fishing in the Exuma Cays will depend upon a network of MPAs along with other management measures to reduce fishing mortality.
Population structure, seasonal movements and feeding of queen conch, Strombus gigas, in deep-water habitats of the Bahamas
TLDR
Population structure, seasonal movement, and feeding ecology were examined for an 18m-deep, unfished population of queen conch in the southern Exuma Cays, Bahamas and showed that the average age was at least 6 years; however, growth in thickness between 1988 and 1991 indicated that thickness is not a satisfactory means of aging conch once erosion of the shell begins.
The Harvest of juvenile Queen Conch (Strombus gigas) off Cape Eleuthera, Bahamas: implications for the effectiveness of a marine reserve
Queen conch is an important marine resource in the Bahamas, however stocks around some of the islands are being threatened. In south Eleuthern, a downturn in the local economy during recent decades
NEGATIVE CONSEQUENCES OF ALLEE EFFECT ARE COMPOUNDED BY FISHING PRESSURE: COMPARISON OF QUEEN CONCH REPRODUCTION IN FISHING GROUNDS AND A MARINE PROTECTED AREA
TLDR
The small phenotype in adults appears to result from selectivity imposed by fishing pressure, and those adults had low mating frequencies, compounding the density effect on reproduction, preserving the integrity of spawner density and population structure will be critical for conch conservation.
Queen conch, Strombus gigas, in fished and unfished locations of the Bahamas: effects of a marine fishery reserve on adults, juveniles, and larval production
TLDR
It is likely that high numbers of produc­ tive stock and larvae in the reserve have a significant positive effect on populations in the northern Exuma Sound.
Efficacy of an established marine protected area at sustaining a queen conch Lobatus gigas population during three decades of monitoring
TLDR
The ECLSP population appears to be slowly dying of old age, and an early life history process has been altered, suggesting that low local retention and a lack of exogenous larval sources are driving the decline.
Variability in size at maturity and reproductive season of queen conch Lobatus gigas (Gastropoda: Strombidae) in the Wider Caribbean Region
TLDR
The implementation of adequate minimum size regulation based on lip thickness and a Caribbean wide seasonal closure using the most recent biological information from this study, taking into consideration the local differences in LT50 and reproductive season, will assist in developing a long term sustainable queen conch fishery in the Caribbean.
Evidence for Allee effects in an over-harvested marine gastropod: density-dependent mating and egg production
TLDR
Heavily exploited populations of queen conch in the Caribbean have been slow to recover despite fishery closures, and failure to recover could result from spawning stock densities that are reduced to the point at which Allee effects begin to operate on reproductive behavior.
Variation in natural mortality : Implications for queen conch stock enhancement
Our long-term investigations of mortality and predation in the large, economically significant gastropod Strombus gigas (queen conch) indicate that instantaneous rates of natural mortality (M) in
Shell middens as indicators of long-term distributional pattern in Strombus gigas, a heavily exploited marine gastropod
Shell middens of the economically important gastropod Strombus gigas in the Exuma Sound system of the central Bahamas were located on the shores of islands near tidal inlets between the Exuma Sound
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