Monitoring anthropogenic sewage pollution on mangrove creeks in southern Mozambique: a test of Palaemon concinnus Dana, 1852 (Palaemonidae) as a biological indicator.
Tropical coastal ecosystems, such as mangroves, have a great ecological and socioeconomic importance for adjacent systems and local populations, but intensive environmental impact monitoring is still lacking, mainly in East Africa. This study evaluated the potential anthropogenic disturbance on Palaemon concinnus population structure and fitness. Palaemon concinnus populations from one peri-urban (domestic sewage impacted) and two pristine mangrove creeks were studied by sampling nearly 100 shrimps per location every 15 days for 12 months. The shrimps at the peri-urban location were larger, experienced longer reproductive periods, presented higher proportion of ovigerous females and better embryo quality when compared with shrimps inhabiting pristine locations. Physiological indices (RNA/DNA ratio) were similar between shrimps at pristine and peri-urban mangroves. However, a higher level of parasitation by a Bopyridae isopod, Pseudione elongata indicated some degree of stress on the host at the peri-urban mangrove, with potential effects on the host population dynamics.
Laboratório Marítimo da Guia, Centro de Oceanografia, FCUL, Avenida N(a) Senhora do Cabo, N° 939, 2750-374 Cascais, Portugal. gil.penha-lopes@fc.ul.pt
Gil
G
Penha-Lopes
Paulo
P
Torres
Stefano
S
Cannicci
Luis
L
Narciso
José
J
Paula
D000818:Animals; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D005260:Female; D033321:Isopoda / Q000502:physiology; D009073:Mozambique; D033541:Palaemonidae / Q000235:genetics / Q000469:parasitology / Q000502:physiology*; D012098:Reproduction; D012722:Sewage / Q000032:analysis* / Q000469:parasitology; D013312:Stress, Physiological; D014876:Water Pollution
D012722:Sewage