Giant red shrimp and blue and red shrimp in the central-eastern Mediterranean: Biology, ecology and fisheries

Food and Agriculture Organization of the United Nations

Food & Agriculture Org., 7 apr 2025 - 305 pagine

Giant red shrimp (Aristaeomorpha foliacea) and blue and red shrimp (Aristeus antennatus) are two of the most valuable fishery resources in the Mediterranean and comprise most of the landed value from deep-water capture fisheries in the central Mediterranean. To support the sustainability of these fisheries, the GFCM adopted three multiannual management plans in 2022 for giant red shrimp and blue and red shrimp. This publication aims to inform the development of effective long-term adaptive management measures within these existing management plans by presenting the results of a collaborative effort to compile comprehensive data, information and research concerning the biology, ecology and fishery of these species in the central-eastern Mediterranean. The analyses and data contained within this study highlight the significant progress that has been made towards improving the understanding of giant red shrimp and blue and red shrimp, while emphasizing the additional work needed to address gaps in order to strengthen the management of deep-water red shrimp fisheries.

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Sommario

Introduction	1

Biology ecology and distribution of giant red shrimp and blue and red shrimp in the centraleastern Mediterranean	5

_Hlk171497763	6

Table 1 Maximum carapace length of giant red shrimp by geographical subarea sex sampling year and depth	7

Table 2 Carapace length range of giant red shrimp by geographical subarea sex source sampling year and monthseason	12

Table 3 Sex ratios of giant red shrimp by geographical subarea depth and month	17

Table 4 Lengthweight relationship parameters a and b for giant red shrimp by geographical subarea and sex	19

Table 5 Estimated growth parameters for giant red shrimp by geographical subarea	21

_Hlk94886630	115

Table 30 Results of the analysis of molecular variance for several grouping scenarios for giant red shrimp samples	117

RANGEA22	118

Table 31 Results of the analysis of molecular variance for several grouping scenarios for blue and red shrimp samples	120

RANGEA24	121

_Hlk175669086	128

Table 32 Local retention and selfrecruitment indices by geographical subarea and scenario	132

_Hlk173839688	136

bookmarkid30j0zll	23

Table 6 Comparison of available maturity scales for giant red shrimp females in relevant literature	25

Table 7 MEDITS maturity scale for crustaceans with a focus characterization on giant red shrimp	28

TablE 8 Monthly spawning period for giant red shrimp by geographical subarea and sex	29

Table 9 Carapace lengths of giant red shrimp by geographical subarea and sex	30

Table 10 Relationships between absolute fecundity relative fecundity body weight gonad weight carapace length and gonad volume for giant red shri...	31

Table 11 Monthly recruitment period for giant red shrimp by geographical subarea	33

_Hlk171607865	34

OLE_LINK5	38

_Hlk171695460	39

Table 12 Maximum carapace length of blue and red shrimp by geographical subarea sex sampling year and depth	41

Table 13 Carapace length range of blue and red shrimp by geographical subarea sex source sampling year and monthseason	45

Table 14 Sex ratios of blue and red shrimp by geographical subarea depth and month	48

Table 15 Lengthweight relationship parameters a and b for blue and red shrimp by geographical subarea and sex	50

Table 16 Estimated growth parameters for blue and red shrimp by geographical subarea and sex	51

Table 17 MEDITS maturity scale for crustaceans with a focus characterization on blue and red shrimp	55

Table 18 Monthly spawning period for blue and red shrimp by geographical subarea and sex	57

Table 19 Carapace lengths of blue and red shrimp by geographical subarea and sex	58

OLE_LINK1	59

_Hlk171688414	60

Table 21 Monthly recruitment period for blue and red shrimp by geographical subarea and sex	61

_Hlk172215839	65

_Hlk172024126	67

_Hlk172467207	68

_Hlk171931586	71

_Hlk171503946	73

_Hlk172128143	74

_Hlk172465520	75

_Hlk172381784	77

Biological population units of giant red shrimp and blue and red shrimp in the Mediterranean	79

_Hlk153999906	80

_Hlk177461984	82

_Hlk177462256	83

Table 23 Von Bertalanffy growth parameters for blue and red shrimp obtained from the literature and classified by geographical subarea sex method ...	86

Table 24 Carapace lengths at 50 percent maturity for giant red shrimp obtained from the literature and classified by geographical subarea sex and aut...	90

Table 25 Carapace lengths at 50 percent maturity for blue and red shrimp obtained from the literature and classified by geographical subarea sex and...	92

Table 26 Contribution of the variables to the first two components of the principal component analysis for giant red shrimp growth with the variance ...	94

Table 27 Contribution of the variables to the first three components of the principal component analysis for blue and red shrimp growth with the vari...	99

_Hlk175300913	137

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_Hlk175561446	141

_Hlk175300042	142

_Hlk175740413	143

_Hlk174889282	144

_Hlk175483845	145

_Hlk174969042	147

_Hlk175301269	148

_Hlk173840182	149

Fisheryindependent data for giant red shrimp and blue and red shrimp in the centraleastern Mediterranean	151

Table 33 Fisheryindependent survey characteristics by geographical subarea	155

Table 34 Information included within the exchange tables of fisheryindependent survey data formats	156

_Ref162608290	162

_Ref162609097	165

_Hlk176942689	169

_Hlk176956530	176

_Hlk177222098	199

_Hlk176445371	205

Spatial distribution of fishing activity targeting giant red shrimp and blue and red shrimp in the centraleastern Mediterranean	207

Table 35 Number of deepwater trawlers by flag year and length class 20152018	212

Table 36 Factors affecting trawling activities and their relevant datasets	228

Table 37 Environmental factors used as predictive variables for modelling the spatial distribution of giant red shrimp and blue and red shrimp	242

Table 38 Variance inflation factor analysis results for giant red shrimp	245

Table 39 Comparison of predicted and observed presence or absence of giant red shrimp based on a generalized additive model and relative Cohens ...	246

Table 40 Variance inflation factor analysis results for blue and red shrimp	248

Table 42 Comparison of predicted and observed presence or absence of giant red shrimp based on random forest and relative Cohens kappa coefficient	252

Table 43 Comparison of predicted and observed presence or absence of blue and red shrimp based on random forest and relative Cohens kappa coef...	255

Table A1 Ranking of the criteria used in the multicriteria decision analysis of bottom trawlers targeting deepwater red shrimps in geographical subare...	268

Table A2 Ranking of the criteria used in the multicriteria decision analysis of bottom trawlers in geographical subarea 24 by vessel length overall	269

Table A3 Pairwise comparison matrix and relative weights of criteria used to estimate the suitability index for bottom trawlers targeting deepwater red...	270

Table A6 Ranking of the criteria used in the multicriteria decision analysis of bottom trawlers in geographical subarea 25 by vessel length overall	274

Table A7 Pairwise comparison matrix and relative weights of criteria for bottom trawlers in geographical subarea 25 based on the analytic hierarchy ...	275

Table A9 Ranking of the criteria used in the multicriteria decision analysis of bottom trawlers in geographical subarea 26 by vessel length overall	278

Table A11 Application of the weighted linear combination method for relevant criteria in geographical subarea 26 based on the weights determined ...	279

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Parole e frasi comuni

Adriatic Sea Aegean Sea analysis areas Aristeidae Aristeus antennatus Risso Bathymetry Bhattacharya Bianchini biomass blue and red bottom trawl carapace carapace length central Mediterranean central-eastern Mediterranean Commercial fishery crustacean D'Onghia Decapoda deep-water fishing deep-water red shrimps Demestre depth eastern Ionian Sea eastern Mediterranean Ecology ELEFAN estimate European Commission F/F+M Figure fishing activity fishing grounds genetic Geographical subarea 24 GFCM giant red shrimp growth Guijarro Gulf of Antalya Ionian Sea Italy Kapiris Levant Sea LFDa LFDs Maiorano Marine Sciences Matarrese maturity Mazara del Vallo mean abundance Mediterranean Sea Mytilineou oocytes Papaconstantinou percent population Ragonese random forest range recruits red shrimp Aristaeomorpha red shrimp Aristeus Relini sampling Sardà scenarios Sea Female Sea GSA sex ratio shrimp and blue shrimp Aristaeomorpha foliacea shrimp Aristeus antennatus spawners spawning species Spedicato Strait of Sicily subarea 16 trawlers Tursi Tyrrhenian Sea unpublished data values variables vessels waters western

Informazioni sull'autore (2025)

Founded in 1945, the Food and Agriculture Organization (FAO) leads international efforts to defeat hunger. Serving both developed and developing countries, FAO provides a neutral forum where all nations meet as equals to negotiate agreements and debate policy. The Organization publishes authoritative publications on agriculture, fisheries, forestry and nutrition.

An intergovernmental organization, the Food and Agriculture Organization of the United Nations (FAO) has 194 Member Nations, two associate members and one member organization, the European Union. Its employees come from various cultural backgrounds and are experts in the multiple fields of activity FAO engages in. FAO’s staff capacity allows it to support improved governance inter alia, generate, develop and adapt existing tools and guidelines and provide targeted governance support as a resource to country and regional level FAO offices. Headquartered in Rome, Italy, FAO is present in over 130 countries.

Informazioni bibliografiche

Titolo	Giant red shrimp and blue and red shrimp in the central-eastern Mediterranean: Biology, ecology and fisheries
Autore	Food and Agriculture Organization of the United Nations
Editore	Food & Agriculture Org., 2025
ISBN	9251397198, 9789251397190
Lunghezza	305 pagine

Esporta citazione	BiBTeX EndNote RefMan

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