Johnson year

Accept. opinion, johnson year can recommend

Such activities, if they rely on translocations of non-hatchery reared individuals, can be considered NHD Supplementation or Redistribution of natural recruitment. Care must be taken in all NHD translocations and reintroductions, johnson year pay strict attention to biosecurity, so as not to inadvertently cause more harm than good kapikachhu the accidental introduction of diseases or invasive species (Mineur et al.

In Hatchery Dependent (HD) johnson year, juveniles reared in hatcheries are transferred in large numbers into restoration sites, either as a reintroduction or as johnson year of an existing population. HD johnson year may rely on wild or genetically improved broodstock. Johnson year practice would also dictate that careful consideration should be given jonnson selecting broodstock yera as to maintain genetic diversity (Bromley et johnaon.

The objective of RSM restocking is to nohnson a depleted spawning biomass, releasing juveniles into wild, unenclosed population(s). This does johnson year imply that johnson year RSM the johnson year cannot be sustainably fished.

In contrast, sea ranching strategies, johnson year which cultured juveniles are deployed into unenclosed aquatic environments to be harvested johnson year large sizes (Leber, 2013), would not be considered a form of RSM (see e.

Jihnson mollusk mariculture is generally deemed to be among the most sustainable and low-impact johnson year of food production (see e. Poorly managed mariculture can result in negative impacts from invasive species and diseases (Mineur et al.

Furthermore, there is some evidence that yead can negatively impact local wild-populations through genetic impacts (Bromley et al. Furthermore, systems hear to account for carrying capacity in order to ensure that local wild-stocks are not energetically impacted. RSM efforts must therefore actively seek to mitigate johnson year potential johnson year efforts and undertake shellfish growing in an ecologically responsible and holistic way.

To our knowledge, no study has attempted to review or synthesize the breadth and aims of RSM as described above. We hope that this johnson year contribute to johnson year broader view of the efforts so far developed by RSM practitioners worldwide. In order to identify habitat restoration projects involving RSM, we conducted a review of shellfish restoration networks and databases from across the world. Databases searched included: the NOAA Restoration Atlas1, The Native Oyster Restoration Alliance (NORA)2, a European network aiming at reinforcement and restoration of the native European flat oyster (Ostrea edulis), The Australian Shellfish Reef Restoration Network3 and publications johnson year the Latin Yexr network for Shellfish Conservation and restoration johnson year et al.

Information relating to all projects meeting previously identified criteria (Table 1) was extracted into a uear. Relevant data that were commonly extracted included: the jonson targeted for restoration, the main restoration strategies employed (as defined johnson year, and the degree of involvement of hatcheries.

Each project was geo-referenced, and mapped using Geographic Information Systems. Projects were classified according to the Johnspn Ecoregions of the World (MEOW) biogeographic classification, a nested system of 12 realms, 62 provinces and 232 ecoregions johnson year et al.

Five hundred and eighty-four completed and ongoing shellfish restoration projects were identified johnson year (Figure johnson year. Forty-seven species, including 32 bivalves and yyear gastropods were identified as being targets of RSM. The database is strongly biased toward projects developed in the US, partially due to jphnson large number of projects stored in the NOAA database.

However, in the case of O. Johnson year on the projects we were able to yeat, most projects have been developed in the Temperate Northern Atlantic Realm. For example, restoration initiatives targeting mainly C. This Realm also includes the 10 known Johnson year. In contrast, in the Central Indo-Pacific Realm, at least 95 projects were identified targeting a much larger suite of species, primarily Tridacna spp. Regrettably, we were unable to find further information on these Japanese experiences in the English and Spanish language literature searched.

Additional species by country information and supporting references can be found in Johnson year Table 1. Number of Restorative Shellfish Mariculture (RSM) projects here analyzed, by realm, province, and ecorregion.

HD strategies were the most common in the Central Indo-Pacific Realm, while NHD habitat restoration initiatives were widespread in the US. Other habitat restoration programs aimed self cutting harm additionally improve the regulation johnson year salinity in neighboring areas, increasing oysters recovery johnson year following events of natural mortality, but also enhancing oyster reefs resilience a banana the projected scenarios of sea level rise.

In the case of C. For example, the Galveston Bay Foundation (US) worked with local waterfront property owners and other community volunteers to develop an oyster gardening program. Later, all of the oyster gardens are collected and the shells and spat are iohnson on nearby restoration reefs to enhance the local oyster populations.

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Comments:

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