Table 4.
Seasonal variation of benthic macroinvertebrate abundance of Lagos Lagoon.
| Class |
Family |
Taxon |
Site I |
Site II |
Site II |
Site IV |
||||
|---|---|---|---|---|---|---|---|---|---|---|
| Dry season | Rainy season | Dry season | Rainy season | Dry season | Rainy season | Dry season | Rainy season | |||
| Polychaeta | Nereididae | Nereis sp. | 9 | 22 | 3 | 2 | 13 | 10 | 10 | 20 |
| Capitellidae | Capitella sp | 3 | 9 | 5 | 15 | 8 | 10 | 5 | 7 | |
| Spionidae | Polydora ciliata | 5 | 8 | 0 | 0 | 0 | 0 | 9 | 4 | |
| Ophelininae | Polypthalmus pitcus | 7 | 3 | 4 | 3 | 3 | 1 | 2 | 0 | |
| Nephytyidae | Nephtys sp. | 10 | 2 | 7 | 15 | 0 | 0 | 2 | 1 | |
| Hirudinidae | Hirudinaria granulosa | 2 | 1 | 12 | 10 | 4 | 6 | 1 | 5 | |
| Amphinomidae | Pherecardia striata | 4 | 2 | 0 | 2 | 9 | 2 | 8 | 1 | |
| Clitellata | Lumbriculidae | Lumbriculus variegatus | 3 | 6 | 1 | 11 | 1 | 1 | 5 | 10 |
| Gastropoda | Potamididae | Tympanotonus spp | 6 | 5 | 3 | 7 | 2 | 10 | 9 | 7 |
| Potamididae | Tympanotamus fuscatus | 3 | 3 | 7 | 8 | 5 | 2 | 1 | 9 | |
| Thiaridae | Pachymelania aurita | 0 | 0 | 20 | 5 | 9 | 10 | 0 | 5 | |
| Neritidae | Neritina glabrata | 19 | 5 | 0 | 0 | 10 | 11 | 9 | 1 | |
| Neritina senegalensis | 13 | 7 | 0 | 0 | 3 | 1 | 2 | 8 | ||
| Turritellidae | Turritella ungulina | 4 | 3 | 4 | 6 | 1 | 2 | 3 | 12 | |
| Donacidae | Iphigenia truncate | 1 | 1 | 1 | 4 | 2 | 1 | 2 | 1 | |
| Planorbidae | Bulinus truncatus | 1 | 1 | 2 | 2 | 3 | 5 | 6 | 1 | |
| Bulinus nyassanus | 2 | 0 | 0 | 3 | 7 | 1 | 0 | 0 | ||
| Physidae | Physa fontinalis | 2 | 2 | 4 | 4 | 5 | 6 | 6 | 14 | |
| Physinae | Physella sp. | 5 | 5 | 4 | 5 | 1 | 1 | 3 | 2 | |
| Bivalvia | Arcidae | Andara sp. | 8 | 4 | 4 | 4 | 9 | 5 | 10 | 2 |
| Mytilidae | Mytilus edulis | 5 | 4 | 5 | 5 | 2 | 2 | 4 | 15 | |
| Thecostraca | Balanidae | Fistubalanus pallidus | 19 | 12 | 3 | 5 | 9 | 9 | 7 | 8 |
| Insecta | Chronomidae | Chironomus sp. | 3 | 2 | 5 | 10 | 3 | 5 | 0 | 0 |
| Malacostraca | Aoridae | Aora gracilis | 2 | 1 | 1 | 5 | 5 | 2 | 1 | 11 |
| Penaeidae | Penaeus notialis | 1 | 1 | 0 | 0 | 1 | 1 | 10 | 15 | |
| Diogenidae | Clibanarius africanus | 7 | 3 | 0 | 0 | 0 | 0 | 1 | 0 | |