Figures & data
Figure 1. Means (±SE) of (a) copper concentration in the hepatopancreas (in relation to wet weight); (b) hepatosomatic index (HSI); (c) lipid content of the hepatopancreas; (d) water content of the hepatopancreas in unfed (black bars) and fed (grey bars) groups of female Nephrops norvegicus during the starvation trial. Letters indicate the results of a Tukey test on the unfed group. Means that do not share a letter are significantly different (P < 0.05). Asterisks indicate a significant difference between fed and unfed groups at week 20 (P < 0.05), n = 6.
Figure 2. Number of females at various ovary stages sampled during the aquarium trial. White, stage 0 (white ovaries); light grey, stage 1 (cream ovaries); grey, stage 2 (pale green ovaries); black, stage 3 (dark green ovaries); white with dots, stage 4 (dark green and swollen eggs visible); white with hatching, stage 5 (mottled green reabsorbed). After Tuck et al. (Citation1997c).
Figure 3. Means (±SE) of (a,b) copper concentration in the hepatopancreas (in relation to wet weight); (c,d) hepatosomatic index (HSI); (e,f) lipid content of the hepatopancreas; (g,h) water content of the hepatopancreas in field-caught female (left panels) and male (right panels) Nephrops norvegicus in 2009 (circles). With unfed (square with cross) and fed (square no cross) means ± SE shown in each graph as a comparison; values derived from this study (females) and from Watts et al. (Citation2014) (males) shown.
Figure 4. (a) Sex composition of the trawl catch from the Clyde Sea Area transect in each month of 2009. White section of bar represents proportion of the catch which are immature females and the black bars represent the proportion of the catch which are mature females; (b) percentage of females at each ovary maturation stage (see scale in legend); (c) percentage of females that were ovigerous.
Figure 5. Size distributions (according to carapace length) of (a) female and (b) male Nephrops norvegicus in trawl catch from the Clyde Sea Area transect in each month of 2009. White (10–19.9 mm), light grey (20–29.9 mm), grey (30–39.9 mm), dark grey (40–49.9 mm), black (50 mm+). Black dashed line represents size at onset of maturity of females (SOM = 26 mm CL).
