Untitled - CNR

More documents

Recommendations

Info

Marine research at <strong>CNR</strong>Strength values through the Fish BladderResonance Model [16] and acoustic datarelative to the water column stratum of thecatch.Small pelagic fish late-larvae seem to formsmaller aggregations than bigger sized individuals.4 ConclusionsThe main results of the acoustic surveysin the western Adriatic Sea show a differencebetween fluctuations of total pelagicbiomass, presenting cycles of about fiveyears, and the irregular variations of singlespecies biomasses (anchovy, sardineand sprat), characterized by peaks andcollapses that seem related with climaticevents on a micro scale.Anchovy is the most abundant species inthe western side of the Adriatic since thelate ’90.The analysis of the historical series of morethen three decades puts in evidence thatsmall pelagic populations in the westernAdriatic Sea are characterized by remarkablefluctuations in time. Total pelagicbiomass fluctuates in an almost regular andperiodic way around the mean value due tothe alternation in dominance between thespecies while single species seem to be affectedby big and unpredictable variations.This research is limited to the Italian sidedue to a political agreement among theAdriatic Sea countries, thus it is not possibleto obtain a complete picture of thestocks in the entire Adriatic Sea; anywaythe eastern side is recently monitored byCroatian scientists and there is now a commoneffort, inside FAO AdriaMed project,to produce in the future a unique evaluationfor all the GSA 17 (Northern and CentralAdriatic Sea).A first attempt was made with the acousticestimates of both sides since 2004, usingrelative abundance indices in tuning catchat age analysis (VPA) for anchovy and sardinestock assessment in GSA 17 [17].For what concerns south Adriatic Sea(GSA 18) since 2002 through AdriaMedproject we began to study the eastern side(Montenegro coastal area) with acousticmethodology; in 2008 the study area wasextended to Albania making the monitoringactivity much more complete accordingto small pelagic fish distribution. Anotherbasic question concerning small pelagicfish is their structure and spatial distributionthat could be even more important forfishery respect to the simple total biomassestimation. Pelagic population biomasstends to concentrate in patchiness, that isto say high density strata containing themain part of the schools present at sea. Inthese areas fishery could get big catches.Around these areas there are wider zoneswith mean/low density.The investigation on anchovy and sardinejuveniles showed that in the period of thesurvey (July-September), at least in the lastyears, anchovy juveniles are well representedand distributed near the coast (depth< 50 m) mainly from the Po river mouthsouthwards until Brindisi, while sardinejuveniles are quite rare and concentratedin southern Adriatic Sea near GarganoPromontory and Manfredonia Gulf.The preliminary observations relative tothe acoustic properties of anchovy latelarvaehave put in evidence that the role ofthe swim bladder seems not negligible asin the adult individuals; these small organismstend to form smaller aggregations respectto the adults of the same species.2025
################################ ################## ########## ####### ######### ## ## ## ## ############ ################################################ ################## ########################### #################################################################################################################################### # # ################### ######################################################################################### ####################Fishery and Sea Resources2004200512°14°16°18°20°22°12°14°16°18°20°### ######### ######## ##### ### # # ####### ###################### # # ##########################45° 45°######################################################## ########################################################################################## ########################## # ############# ##### ### #################### ########## ######################## ######################## ######################################## ############################################################## ##########44° ##### 44°######################## ################################################################################################################################################################################################################################################################################################################# ######################### ### ####################################43° 43°41° 41°########### # #################42° 42°####################################################### ## ########## ###12°14°16°18°20°22°12°14°16°18°20°2006200711°13°15°17°19°46° 46°### ## ## #### ################# ###### ###### ############################################### #### ######### # ############################## ####### #############################################44°## ############### ###### #################### ##### 44°######################################################################################################################################################################################################################################################### ############################################################################################################ ################### # ###################################################################################42° 42°11°13°15°17°19°200811°13°# # # ########## # # #############15°17°19°21°46° 46°#### ##44° 44°# ## #### # #Anchovy juveniles presenceAnchovy juveniles absence##### #######42° 42°########11°13°15°17°19°21°Figure 5: Anchovy juvenile presence along the acoustic transects derived from the historicalsurveys from 2004 to 2008.2026
Page 2:
Fishery and Sea Resources
Page 5 and 6:
Fishery and Sea Resourcesto nest in
Page 7 and 8:
Fishery and Sea ResourcesFigure 2:
Page 9 and 10:
Page 11 and 12:
Fishery and Sea Resourcesturtles. S
Page 13 and 14:
Fishery and Sea Resourcesshould be
Page 15 and 16:
Fishery and Sea ResourcesTable 1: A
Page 17 and 18:
Fishery and Sea ResourcesReferences
Page 19 and 20:
Fishery and Sea Resources[25] M. Na
Page 21 and 22:
Fishery and Sea Resources1856
Page 23 and 24:
Fishery and Sea Resourcesbatus) or
Page 25 and 26:
Fishery and Sea ResourcesTable 1: D
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Fishery and Sea Resourcesand at low
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Fishery and Sea Resourcesj a C D C
Page 49 and 50:
Fishery and Sea ResourcesDoorARjHFa
Page 51 and 52:
Fishery and Sea Resourcesbeen reach
Page 53 and 54:
Page 55 and 56:
Fishery and Sea Resourcestigated th
Page 57 and 58:
Page 59 and 60:
Fishery and Sea Resourcesmerge dail
Page 61 and 62:
Page 63 and 64:
Fishery and Sea Resourcesnetic hete
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Fishery and Sea Resources[23] B. Gr
Page 73 and 74:
Fishery and Sea Resourcescreases, r
Page 75 and 76:
Fishery and Sea Resourcestails see
Page 77 and 78:
Fishery and Sea Resourceshave grown
Page 79 and 80:
Fishery and Sea Resourcesfraction o
Page 81 and 82:
Fishery and Sea Resources1916Figure
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Fishery and Sea Resourcesbeen calcu
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Fishery and Sea Resourceswhile on t
Page 99 and 100:
lance the chance of damaging the ge
Page 101 and 102:
Fishery and Sea Resources[14] R.R.
Page 103 and 104:
Fishery and Sea Resources[42] T.J.
Page 105 and 106:
Page 107 and 108:
Fishery and Sea Resourcesing fish,
Page 109 and 110:
Fishery and Sea Resources10 sea bas
Page 111 and 112:
Fishery and Sea Resourcesstagechara
Page 113 and 114:
Fishery and Sea ResourcesTRAS (in s
Page 115 and 116:
Fishery and Sea Resources4 Discussi
Page 117 and 118:
Page 119 and 120:
Fishery and Sea Resources[25] P. Go
Page 121 and 122:
Page 123 and 124:
Fishery and Sea Resourcesability, i
Page 125 and 126:
Page 127 and 128:
Fishery and Sea Resources6. Sale. T
Page 129 and 130:
Fishery and Sea Resourcesexperiment
Page 131 and 132:
Fishery and Sea Resources[20] R. Hi
Page 133 and 134:
Page 135 and 136:
Fishery and Sea Resourcestranscript
Page 137 and 138:
Page 139 and 140: Fishery and Sea Resourcesquantifica
Page 141 and 142: Fishery and Sea Resourcestion of th
Page 143 and 144: Fishery and Sea Resources[22] A. Ha
Page 145 and 146: Fishery and Sea ResourcesFigure 1:
Page 147 and 148: Fishery and Sea Resourcesting the y
Page 149 and 150: Fishery and Sea ResourcesSpecies Su
Page 151 and 152: Fishery and Sea Resources6 Acknowle
Page 153 and 154: Fishery and Sea Resources[22] G. Ga
Page 157 and 158: Fishery and Sea ResourcesParameters
Page 159 and 160: BI (Kg per km 2 )Fishery and Sea Re
Page 161 and 162: Y/R (g)SSB/R (g)Fishery and Sea Res
Page 163 and 164: BI (Kg per km2)20092008200720062005
Page 165 and 166: Fishing mortality (2-4)Fishing mort
Page 167 and 168: Number of runsFishing mortality (F)
Page 169 and 170: Fishery and Sea ResourcesStock stat
Page 171 and 172: Fishery and Sea Resources[14] C.L.
Page 173 and 174: Fishery and Sea Resourcesare object
Page 175 and 176: Fishery and Sea Resourcesan electro
Page 177 and 178: Fishery and Sea Resourceshabt*ccced
Page 179 and 180: Fishery and Sea Resourcespcdcofmdcb
Page 181 and 182: Fishery and Sea ResourcesReferences
Page 183 and 184: Fishery and Sea Resources2018
Page 185 and 186: Fishery and Sea ResourcesMid-Line20
Page 187 and 188: Fishery and Sea ResourcesLow biomas
Page 189: Fishery and Sea Resourcesthen, afte
Page 197 and 198: Fishery and Sea ResourcesNeverthele
Page 199 and 200: Fishery and Sea Resources2.3.2 Data
Page 201 and 202: Fishery and Sea Resources& Aguado G
Page 205 and 206: Fishery and Sea Resources[27] F. Bi
Page 213 and 214: Fishery and Sea Resourcesthe polych
Page 215 and 216: Fishery and Sea Resources4 Discussi
Page 219 and 220: Fishery and Sea Resources[28] A.P.
Page 225 and 226: Fishery and Sea Resources2.3 Otolit
Page 231 and 232: Fishery and Sea Resourceshigher tem
Page 233 and 234: Fishery and Sea Resources[12] S. Kh
Page 235 and 236: Fishery and Sea Resources[37] G.E.
Page 237 and 238: Fishery and Sea Resourcespolicy dec
Page 241 and 242:
Page 243 and 244:
Fishery and Sea Resources5 Analysis
Page 245 and 246:
Fishery and Sea Resources[2] G. Rel
Page 247 and 248:
Fishery and Sea Resources[27] G.R.
Page 249 and 250:
Fishery and Sea Resourcesthe organi
Page 251 and 252:
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Fishery and Sea Resources[26] M.G.
Page 263 and 264:
Page 265 and 266:
Fishery and Sea Resourcesgrowth [14
Page 267 and 268:
Fishery and Sea Resources(YOY) fish
Page 269 and 270:
Page 271 and 272:
Fishery and Sea Resources3025Sparus
Page 273 and 274:
Fishery and Sea Resourcesfirst in O
Page 275 and 276:
Fishery and Sea ResourcesAnguilla a
Page 277 and 278:
Page 279 and 280:
Fishery and Sea Resources[27] R. Ro
Page 281 and 282:
Fishery and Sea Resourcesspecies mo
Page 283 and 284:
Page 285 and 286:
Fishery and Sea ResourcesYear S1 S2
Page 287 and 288:
Page 289 and 290:
Page 291 and 292:
Page 293 and 294:
Page 295 and 296:
Page 297 and 298:
Page 299 and 300:
Page 301 and 302:
Page 303 and 304:
Page 305 and 306:
Page 307 and 308:
Page 309 and 310:
Page 311 and 312:
Page 313 and 314:
Page 315 and 316:
Fishery and Sea Resourcesthe weight
Page 317 and 318:
Page 319 and 320:
Page 321 and 322:
Page 323 and 324:
Page 325 and 326:
Fishery and Sea Resources[26] A. M
Page 327 and 328:
Page 329 and 330:
Fishery and Sea Resourcesimmediatel
Page 331 and 332:
Fishery and Sea ResourcesPRT(g g -1
Page 333 and 334:
Fishery and Sea Resources100%Decemb
Page 335 and 336:
Ne/KyFishery and Sea ResourcesNemat
Page 337 and 338:
Fishery and Sea Resources[4] M. Hol
Page 339 and 340:
Fishery and Sea Resources[28] T. La
Page 341 and 342:
Fishery and Sea Resourcesmunity can
Page 343 and 344:
Fishery and Sea Resources3 The fish
Page 345 and 346:
Fishery and Sea Resourcesthe fisher
Page 347 and 348:
Fishery and Sea Resources[16] J.M.
Page 349:
show all

Untitled - CNR

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?