Garrido-Faustino, S. (Soledad)

Ramos, F. (Fernando)

Rincón-Hidalgo, M. (Margarita)

Silva, A.

Uriarte-Ramalho, A. (Amaya)

English

Garrido-Faustino, Soledad

Uriarte-Ramalho, Amaya

Ramos, Fernando

Rincón-Hidalgo, Margarita

Digital.CSIC

Anchovy in Division 9a West (ane.27.9aN, 9aCN and 9aCS). Fishery and Surveys data: data availability and trends.

Repositorio Institucional Digital del IEO

Anchovy in Division 9aWest (ane 27 9aN 9aCN        . . ,   and 9aCS). Fishery and Surveys data: Data availability and trendsS G id (1) Al d Sil (1) A d é U i t (2)usana  arr o ,  exan ra  va ,  n r s  r ar e , Fernando Ramos(3), Margarita Rincón(4) ( ) ê d d f ( ) l1 Instituto Portugu s o Mar e a Atmos era IPMA . Portuga .(2) AZTI Tecnalia. Pasajes (Gipúzcoa). Spain.(3) Instituto Español de Oceanografía (IEO), Centro Oceanográfico de Cádiz. Spain .(4) Instituto de Ciencias Marinas de Andalucía (ICMAN). Consejo Superior de Investigaciones Científicas. España.ICES WKPELA‐2018 Benchmark Workshop. ICES HQ. Copenhagen, 12‐16 February 2018.Ane.27.9aWest. LANDINGS by sub‐division, country andmétier9aWest• PT_Data since 1943, SP: Data since 1989.• Mean % of landings (1989 to 2016): 1065 8 tons (70 8%) for the 9a CN 309 3 tons. . ‐ , .(16.3%) for the 9a‐N and 61.7 tonnes (12.9%) for the 9a‐CS.• >95% purse‐seine fisheries in Portugal and Spain.Ane.27.9aWest. LANDINGS by quarter and discards• Most catches in sub‐divisions 9aN and9aCN in 3rd and 4th quarter.• Most catches in the 1st quarter for 9aCS.• Discards are considered null in Portugaland ranging 0‐0.001% in Spain.Ane.27.9aWest. LANDINGS: size composition – dataavailabilityarea quarter 1998 1999 2009 2011 2012 2013 2014 2015 20169 N 1a2349aCN 1 3 (319) 3 (214) 1 (78) 3 (662) 1 (134)2 1 (101) 1 (153) 4 (408) 6 (714)3 2 (195) 2 (171) 1 (104) 4 (495) 8 (1440)4 8 (965) 1 (120) 1 (115) 1 (55)9aCS 1 1 (101)4 1 (58)• Length frequency distribution of catches only available on a regular basis in recent years–and for sub‐divisions 9aN and 9aCN.• Due to the low anchovy abundance in 9aCS in recent years, very few LFD data.Ane.27.9aWest. LANDINGS: size composition by sub‐division9aNLength ranged between 9‐20 cmMost frequent and abundant size‐classes landed:13.5 – 16.5 cmSimilar sizes in different quartersAne.27.9aWest. LANDINGS: size composition by sub‐division9aNLength ranged between 9‐20 cmMost frequent and abundant size‐classes landed:13.5 – 16.5 cmSimilar sizes in different quarters9aCNLength ranged between 10‐20 5 cm.Most frequent and abundant size‐classes landed:14.5 – 17 cmSimilar sizes in different quarters for larger fish,although smaller fish also caught in 2nd quarter(12‐14.5 cm)Ane.27.9aWest. LANDINGS: weight by sub‐division and age• Mean length of anchovy in catches was smaller in sub‐division 9aN when compared tosub‐division 9aCN.• Age structure of the population in the catches: only data from the Spanish fishery (9aN).Dominated by 1 and 2 year old fish.Ane.27.9aWest. LANDINGS: biological data ‐ availability• Very few data.• Not possible to estimate growth and maturity ogives from landings.Ane.27.9aWest. SURVEYS: data availabilityM th d A tie o cous csSurvey PELACUS PELAGO SAR JUVESARInstitute IEO IPMA IPMA IPMA(Country) (Spain) (Portugal) (Portugal) (Portugal)Subareas 9 a N 9 a CN 9 a S 9 a CN 9 a S 9 a CN.   .   ‐ .   .   ‐ .   .  Year/Quarter Q2 Q1 Q2 Q4 Q41998 Nov1999 Mar2000 Mar Nov2001 Mar Nov2002 Mar2003 Feb Nov2004 Jun2005 Apr Nov2006 Apr Nov2007 Apr Nov2008 Apr Apr Nov2009 A Apr pr2010 Apr Apr2011 Apr Apr2012 Apr2013 Mar Apr Nov2014 Mar Apr Nov2015 Mar Apr Dec2016 Mar Apr Dec2017 Mar Apr Dec• 2 complementary spring acoustic surveys• 2 autumn surveys (one discontinued) the other aiming sardine juveniles (9aCN), recent.Ane.27.9aWest. SURVEYS: time series of acoustic surveys• PELACUS (9aN): Very low abundance, periods of absence. Historical maximum in 2017 (3525 tons).• SAR (9aCN and CS, 1998‐2008 w/ gaps). Highest in 2001 (2276 tons). >68% anchovy in 9a.CS• JUVESAR (9aCN, 2013‐present). Highest in 2015 (29556 tons).• PELAGO (9aCN + 9aCS) Highest for 9aCN in 2016 (38302 tons) Highest in 9a CS in 1998 (2505 tons). . . .Ane.27.9aWest. SURVEYS: internal consistencyA ti t f PELACUS (9 N) d PELAGO (9 CN d CS) i 2008 t t• ge es ma es rom a. an a an s nce o presen .• Cohort tracking PELAGO: Generally, abundance decreases with increasing age (exception of cohortse.g. 2004 & 2009). High variability of mortality per age between cohorts.• Cohort tracking PELACUS: no clear tendency in the abundance per age (small area, very lowabundance when compared to the contiguous 9a.CN).Ane.27.9aWest. SURVEYS: between survey consistency• General trends are fairly consistent.• Periods of low abundance detected by PELAGO+SAR+PELACUS from 1998 to 2007.• Small peak in 2008 and larger during 2011 estimated by PELAGO+PELACUS.• Highest peak in abundance for the 9a.CN (2016) and for the western stock was onlyestimated by the PELACUS survey during the following year (2017).Ane.27.9aWest. SURVEYS: consistency• Graphical analysis of cohort tracking does not show a clear signal of strong cohorts beingdetected at several ages.Ane.27.9aWest. SURVEYS: size composition• LFD for surveys in 9aN: modal size class 15‐16.5 cm.• LFD for surveys in 9aCN: modal size class 11‐17.5 cm, frequently bi‐modal .• LFD for surveys in 9aCS: modal size class 10‐16 cm.Ane.27.9aWest. SURVEYS: weight at age• Mean length estimated during spring for the western population (PELAGO + PELACUS surveys)was generally lower in the 9a.CN and 9a.CS when compared to the 9a.N, which contrasts with thedata from landings.•JUVESAR: mean weight at age 0: 5.3 g. PELAGO+PELACUS: mean weight 16.41 g at age 1, 23.79 gat age 2, 27.08 g at age 3, 31.28 g at age 4.Ane.27.9aWest. SURVEYS AND LANDINGS: comparison oflength composition• Similar length composition in 9a.N.h i f (9 ) ll i id b GO d l di• In t e ma n area o west a.CN genera y co nc ent etween PELA an an ngs,except 2015 and JUVESAR : size class mode of the surveys significantly lower than that oflandings: landings target only the larger fish.Ane.27.9aWest. SURVEYS: age composition• Age 1 largely dominates during all years, followed by age 2.• Age 3 very low abundance during all years (>10% of the stock).• 2016: Age 2 was comparatively more abundant during the year of peak abundance forthe stock.Ane.27.9aWest. SURVEYS: maturity• Maturity estimated from PELAGO 9aCN an 9aCS.• Anchovy maturity at length is very steep.• L50 generally occurs between 10 and 12 cmAne.27.9aWest. SURVEYS: spawning cycle• 2017: Matosinhos (9aCN): Spawning in March, April, peak in June and end in July/AugustAne.27.9aWest. SURVEYS: growth parameters and naturalmortality• No growth parameters are currently available for 9a.West anchovy.• Natural mortality, M, is unknown for this stock. Cohort tracking of the stock indicator bypooling all cohorts per age indicates that total mortality is ‐1.76, therefore naturalmortality should be below this value However the total mortality estimated by cohort. ,analysis shows high variability and occasionally inconsistent data.• Median of total mortality is ‐2.18 (Ages1 to 2) and ‐1.39 (Ages 2 to 3).Ane.27.9aWest. Assessment: Trend‐based qualitativeassessment: stock size and harvest rate indicators• Anchovy abundance 9aWest:Very low from the beginning of the series until2006, increased afterwards, with 3 high peaks in2016, 2011 and 2017 (with 38507, 28558 and19006 tons respectively), .Ane.27.9aWest. AssessmentWestern componentSubdiv. 9.a N + 9.a CN + 9.a CSYear TAC 9a stock Catches Stock size HR• Anchovy in 9a not yet analyticallyassessed.1999 1466.3 596.0 2.462000 141.82001 443.6 368.0 1.212002 543 4 1542 0 0 35• ICES Stock Data Category 3, qualitativelyassessed through a survey biomass trend‐based assessment without catch advice . . .2003 301.0 112.0 2.692004 226.4 n.a2005 92.2 1062.0 0.09.• Advice from 9a‐S population: more data,more stable.2006 109.9 02007 843.9 1945.0 0.432008 303.3 5810.5 0.052009 58 6 2114 9 0 03•Yearly TAC since 2011, that ranged from7600 tonnes in that year to 12500 in 2016(peak stock size West = 38507 tonnes) . . .2010 281.1 1230.4 0.232011 7600 3781.5 28558.4 0.132012 8600 778.7 n.a.•Since 2015 both components (W, S) withstock size biomass indicator2013 8800 392.4 4284.2 0.092014 9700 1281.4 1947.0 0.662015 10600 2717.0 8237.0 0.33(PELAGO+PELACUS for West ‐ ICESWGACEGG 2017).2016 12500 7140.0 38507.4 0.19Ane.27.9aWest. Assessment• EXPLORATORY ASSESSMENT WITH SPICT –Alexandra Silva• REFERENCE POINTS AND ADVICE (In year advice based onsurvey biomass estimates and sustainable harvest ratesfrom YPR analysis) – Andrés Uriarte

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Anchovy in Division 9a West (ane.27.9aN, 9aCN and 9aCS). Fishery and Surveys data: data availability and trends.

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