Table 1 Length-weight relationships and conversion factors for Atlantic (North, South) and Mediterranean swordfish. For Atlantic Swordfish, conversion factors are those
proposed by the Secretariat (2013) and adopted as interim by the WG at the Data Preparatory meeting 2013. For Mediterranean Swordfish, conversion factors were updated
at the 2017 SCRS meeting.

Weight-size relationship (kg): alpha * Size(LJFL cm)beta
Stock
N-ATL
S-ATL
MED

alpha
4.45373E-06
2.46E-06
8.43E-06

beta
3.203784011
3.313974115
3.059

Weight (kg)SizeRound (RWT)
LJFLRound (RWT)
LJFL
Gilled & Gutted (GWT) LJFL

Size Range (cm)
80-25389-26652-290

Reference
Mejuto et al. (1988) & Hazin et al. (2001)
Tserpes et al. (2017)

Size to size conversion factors: alpha+beta*Size_inp
Stock
ATL
ATL

alpha

beta

7.821534
10.307257

1.089696
1.255833

size pred (cm)
LJFL
LJFL

size inp (cm)
EFL
OPFL

Reference
Rey Gonzales-Garces (1978)
Rey Gonzales-Garces (1979)

Weight to Weight conversion factors: Weight_pred = alpha* Weight_inp
Stock
N-ATL
S-ATL

alpha
1.324565
1.14

Weight pred (kgs)
Round
Round

Weight inp (kgs)
Dress
GuttedConversion factors for fish products
Area/Source
Factor1
Spp.
N. West Atl.
RWT=1.33xDWT
SWO
CentralEastAtl.
RWT=1.3158xDWT
SWO
Mediterranean
RWT=1.14xGWT
SWO
S. West Atl.
RWT=[GWT/0.8009]0.9852
SWO
S. West Atl.
GWT=1.17xDWT
SWO
S. East Atl.
RWT=1.14xGWT
SWO

Reference
Turner (1987)
Mejuto et al. (1988)
Tserpes et al. (2017)
Amorim et al. (1979)
Amorim and Arfelli (1984)
Mejuto et al. (1988)

1 Product types:
BM = Belly Meat

GWT = Gilled and Gutted

RWT = Round Weight (all catch statistics are maintained in RWT units)

FIL = Fillet Weight

DWT = Dressed Weight (gilled, gutted, part of head off, fins off)

OT = Other

Reference
Turner 1987 & Mejuto et al. (1988)
Mejuto et al. (1988)

References

Amorim A. F., and ARFELLI, C. A. 1984 Estudo biológico-pesqueiro do espadarte, Xiphias gladius Linnaeus, 1758, no sudeste e sul do
Brasil (1971 a 1981). B. Inst. Pesca, São Paulo, 11(único):35-62.

Amorim A., C. Arfelli, A. González Garcés, and J.C. Rey (1979) Estudio comparativo sobre la biología y pesca del pez espada Xiphias
gladius L. (1758) obtenidos por las flotas española y Brasileña. Col.Vol.Sci.Pap. ICCAT, 8 (2): 496-503.

Anonymous (1993). Report of the Second GFCM-ICCAT Expert Consultation on Stocks of Large Pelagic Fishes in the Mediterranean. Col.
Vol. Sci. Pap. ICCAT, 40(1): 11-35.

Mejuto, J., and J.M. De La Serna (1993) A preliminary analysis to obtain a size weight relationship for the Mediterranean swordfish ((Xiphiasgladius) Col.Vol.Sci.Pap. ICCAT, 40(1): 149-154.

Mejuto, J., S. Iglesias, J.C. Rey, E. Alot, and B. Garcia (1988) Relaciones talla-peso del pez espada (Xiphias gladius, L.) en las areas BIL-94 yBIL-95, por estratos espacio temporales. Col.Vol.Sci.Pap. ICCAT, 27: 214-221.

Rey J.C., A. González Garcés (1979). Nuevos datos sobre la pesquería española de pez espada, Xiphias gladius, biología y morfometría.
Col.Vol.Sci.Pap. ICCAT, 8 (1): 504-509.

Tserpes G., Ortiz de Urbina J., Abid N., Ceyhan T., Garibaldi F., Peristeraki P., and Di Natale A. (2017) Length - weight relationships for
the Mediterranean swordfish. Col.Vol.Sci.Pap. ICCAT, 74(3): 1346-135.

Turner S. (1987). Length to weight and weight to length conversions for swordfish in the western north Atlantic and Gulf of Mexico.
Document n°86/11 presented at the 1986 NMFS/SEFC swordfish assessment workshop.