Southern Barbel

  • Scientific name. Barbus meridionalis Bonaparte, 1839
  • Annexes of Birds and Habitats directives listing the area of occupancy of the species. The species is present in annexes II and V of Habitats directive; in this Annex it is indicated as Barbus spp.
  • Size of the population in the project area: Historically in the Parma Province the Southern Barbel was present in the watercourses of Ceno, Taro, Baganza, Parma, Cedra, Stirone and Enza river, with populations of modest entity in 14/14 presence sites (Nonnis Marzano et al, 2003). In particular, the study of the Natura2000 sheets evidenced the presence of the Southern Barbel in 7/14 project areas (50%). At present, populations are strongly declining and in some cases sporadic specimens are found . The situation of the Parma region is similar to that of nearby provinces where in the past the Southern Barbel was present in the upper mountain stretches of the Trebbia, Nure, and Enza rivers, while at the time being some relict populations remain often in sympatry with the brown trout. As already mentioned, some more recent monitoring may be referred to local activities which are not supported by any official projects: the species is censused as “rare” on the basis of semi-quantitative parameters. In the regional fish map the numerical population size of censused populations between the hill and Apennine area evidences demographic data even more alarming than those relating to the Common Barbel. Semi-quantitative estimates indeed list “rare” or “poor” presence in every sampled station; quantitative data referring to the D area indicate estimates fluctuating between 0,001 and 0,003 ind/mq.
  • State of conservation in the project area. The distribution of the species is limited and fragmented and evidences a strong numerical decline at both national and local level (Zerunian, 2002-4; Nonnis Marzano et al., 2003). The Southern Barbel is an endemite of the Po plain and Veneto regions whose distribution is mainly linked to the Apennine and hill areas of central and northern Italy, therefore the last relict populations must be considered at a serious threat of extinction and deserve to be duly protected. The high numerical decline of the populations occurred during the last years in the Emilia Romagna region is mainly due to the water depletion of rivers and their fragmentation derived from the exploitation of the rivers for hydropower generation. Also significant is the effect due to overdense restocking of salmonids.

class "Downloads" already exists
    while executing
"::itcl::class Downloads {
        inherit Barbie

        private variable downloads_menu ""
        public  common   downloads_dir

        public me..."
    (in namespace eval "::rwdatas" script line 3)
    invoked from within
"namespace eval ::rwdatas {

    ::itcl::class Downloads {
        inherit Barbie

        private variable downloads_menu ""
        public  common   ..."


OUTPUT BUFFER:

source [file join $rweb_root tcl before.tcl]
#
# -- downloads.tcl
#
# yet another datasource for controlling document downloads
#
#::rivet::apache_log_error notice "sourcing file [info script]"
#

package require Barbie
package require rwbinary

namespace eval ::rwdatas {

    ::itcl::class Downloads {
        inherit Barbie

        private variable downloads_menu ""
        public  common   downloads_dir

        public method willHandle {arglist keyvar} 
        public method init {args}
        public method menu_list {page} 
        public method is_stale {key timereference}
        #public proc to_url {lm} { return [Barbie::to_url $lm] }

        public proc list_downloads {dbhandle {public "%"}}
        protected method create_page_obj {key ooclass reassigned_key} { return ""}
    }

    ::itcl::body Downloads::is_stale {key timereference} {
        if {$key == "download_doc"} { return true }
        
        return [chain $key $timereference]
    }

    ::itcl::body Downloads::list_downloads {dbhandle {public "%"}} {

        set q { select d.*,s.descrizione,s.sectionid from documenti d   \
                       join sezioni s on d.sezione=s.sectionid          \
                       where d.pubblico like '$public'                  \
                       order by s.sectionid,s.ordine,d.ordine,d.docid; }

        set docsdb [dict create]
        #puts "
[subst $q]
"

        $::barbie::dbhandle forall [subst $q] document {

            set sectionid $document(sectionid)
            unset document(sectionid)
            set sezione_descrizione $document(descrizione)
            unset document(descrizione)
            set docid $document(docid)
            unset document(docid)

            dict set docsdb $sectionid descrizione $sezione_descrizione
            dict set docsdb $sectionid documenti $docid [dict create {*}[array get document]]

        }
        return $docsdb

    }

    ::itcl::body Downloads::willHandle {arglist keyvar} { 
        upvar $keyvar key 

        set args_d [dict create {*}$arglist]
        if {[dict exists $args_d downloads]} {

            set key listdownloads
            return -code break -errorcode rw_ok 
        }
        if {[dict exists $args_d dwnl]} {

            set key download_doc
            return -code break -errorcode rw_ok 

        }

        return -code continue -errorcode rw_continue 
    }

    ::itcl::body Downloads::init {args} {

        set downloads_dir [file join $::rivetweb::site_base docs]
        $this key_class_map download_doc ::rwpage::BinaryFile
        $this key_class_map listdownloads ::rwpage::DownloadMgr

        set mm $::rivetweb::menumodel
        set lm $::rivetweb::linkmodel

        set downloads_menu [$mm create_menu downloadsmanager root normal]
        $downloads_menu assign title "Documenti" $::rivetweb::default_lang
        $downloads_menu assign title "Documents" en

        set downloads_link [$lm create FileUpload ""                                    \
                                    { it "Download Documenti" en "Documents Download" } \
                                    [dict create downloads 1]                           \
                                    [dict create it "Download documenti"                \
                                                 en "Documents Download"]]
        
        $downloads_menu add_link $downloads_link
    }

    ::itcl::body Downloads::menu_list {page} {
        return [list documenti $downloads_menu]
    }

    ::itcl::body Downloads::create_page_obj {key ooclass reassigned_key} {
        upvar $reassigned_key rkey

        set rkey $key
        
        set p ""
        switch $key {
            download_doc {

                set docid [::rivet::var_qs get dwnl]
                set d     [::barbie::Documenti #auto]
                set nr    [$d fetch $::barbie::dbhandle [list docid $docid] dd]

                if {[::barbie::is_logged] || [::barbie::is_supervisor]} {
                    set filter 1
                } else {
                    set filter [expr $dd(pubblico) == "y"]
                }

                if {($nr > 0) && $filter} {
                    set binary_file [file join $downloads_dir $dd(filename)]
                    set p [$ooclass ::#auto $key $binary_file]
                } else {
                    return -code error "Documento inaccessibile"
                }

                $d destroy

            }
            listdownloads {
                set p [$ooclass ::#auto $key]
                #$p configure -downloads_dir docs
            }
        }

        return $p
    }

}

package provide Downloads 1.0

source [file join $rweb_root tcl after.tcl]