Synergistic effect of gamma irradiation and proper packaging for the control of insects in smoked shrimps (Penaeus notialis) from three different water bodies in Ghana

Figures & data

Table 1. Food preference by insects infesting stored shrimp from different water sources

Sources of shrimp	Initial weight before incubation (g)	Average weight after incubation (g)	Average weight loss after incubation (g)	Percentage loss	Treatment means± SD
Lagoon	10	8.6	1.4	14	8.7 ± 0.004a
River	10	7.4	2.6	26	9.3 ± 0.004b
Sea	10	8.3	1.7	17	9.1 ± 0.004b

Means within each column with different letters are significantly different (P ≤ 0.05)

Table 2. Weight changes in shrimp samples kept under laboratory conditions for two months at 30° C

Storage (months)	Initial weight before incubation (g)	Average weight after incubation (g)	Average loss after incubation (g)	Percentage Loss	Treatment (means±SD)
Initial	10	-	-	-	10.0 ± 0.003b
2 months	-	8.1	1.9	43	8.1 ± 0.003a

Means within each column with different letters are significantly different (P ≤ 0.05)

Plate 1: A: photograph showing dehydrated-smoked shrimp placed in dense polypropylene bowl with lid eccentrically placed on top of the bowl (x 1/5).

Plate 2: A: Dorsal view of Larva of Necrobia rufipes (Red-Legged Ham Beetle), B: Dorsal view of an adult Necrobia rufipes (Red-Legged Ham Beetle), C: The ventral view (underside) of the abdomen of an adult Necrobia rufipes (Red-Legged Ham Beetle)

Plate 3: A: Dorsal view: (larva of Dermestes maculatus DeGeer (Hide Beetle), B: Dorsal view: (Adult Dermestes maculatus DeGeer (Hide Beetle)), C: The vertical view (Adult Dermestes maculatus DeGeer (Hide Beetle))

Figure 1. Moisture sorption isotherm of dehydrated shrimp from lagoon source at 30°C for 20 days.

Figure 2. Moisture sorption isotherm of shrimp from riverine source at 30°C for 20 days.

Figure 3. Moisture sorption isotherm of shrimp from the sea at 30°C for 20 days.