Table 1 Description and summary statistics of key variables

Dependent variables

TOTALCAP^a

Shrimp caught in peak season (kg)

48,003.93

(1821.02)

MEMBERSHIP

1 If shrimpers belong to a fisher group, 0 otherwise

0.27

Input variables used in SPF model

ENGINEOPER

Number of outboard engines operated

1.48

(0.79)

FUELCOST

Cost of fuel used per week during peak season (Naira)

181,384.00

(121,022.90)

USEFULSEINE

Useful life of seine (years)

2.18

(1.41)

LEADERSEMP

Number of skippers employed

0.69

(0.91)

HELPERSEMP

Number of helpers employed

1.03

(1.02)

Production characteristics

HIGHENGCAP

1 If engine capacity is above 40 HP, 0 otherwise

0.02

FISHVILL

1 If fishing community is within 1 km radius of other fishing community, 0 otherwise

0.39

Independent variables

AGE

Age of respondent (years)

40.20

(11.01)

EXPERIENCE

Years of shrimping experience

17.39

(10.75)

EDUCYEAR

Years of education

8.50

(4.53)

REPEAT

Number of times classes were repeated

0.10

(0.47)

CUSTOMERS

Number of major customers

1.33

(1.49)

FEMLABSHR

1 If household female laborer engaged in shrimping activities, 0 otherwise

0.22

FEMAS

1 If household female laborer belonged to a shrimping group, 0 otherwise

0.18

AKWA-IBOM^b

1 For Akwa-Ibom, 0 otherwise

0.33

ONDO^b

1 For Ondo, 0 otherwise

0.89

MOBILE

1 For mobile phone ownership, 0 otherwise

0.05

EXTENSION

1 If respondent had access to extension, 0 otherwise

0.24

CREDIT

1 If respondent had access to credit, 0 otherwise

0.13

TAROAD

1 If respondent had access to tarmacked road, 0 otherwise

0.26

COOP

1 If respondent participated in local financial cooperative, 0 otherwise

0.11

LEADER

1 If respondent was a skipper, 0 otherwise

0.13

SHOCK

1 If respondent had a shock, 0 otherwise

0.68

Observations

353