Preliminary investigations on the Ichthyodiversity of Kilifi Creek, Kenya

Oyugi, Dalmas O.

doi:10.4314/wiojms.v4i1.28469

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…These marine fish data include 13 bony fish families that commonly inhabit shallow inshore coastal waters in estuaries and around coral reefs, similar to those Iron Age assemblages reported from the inland sites of Chombo, Mtsengo, and Mbuyuni, located 15 to 25 km from the coast [ 46 ]. Interestingly, of the 13 families reported from PYS, a modern assessment of fish diversity and catch location in Kilifi Creek indicates the majority come from closer to the open sea at the mouth of the creek rather than in the middle of the lagoon or into the tidal creeks [ 51 ]. Therefore, the harvesting and transportation of the late Holocene molluscan assemblages, when considered relative to the marine fish data, could have resulted from direct acquisition and movement of people using these coastal resources for subsistence.…”

Section: Discussionmentioning

confidence: 99%

“…Representing a drowned river valley following postglacial sea level rise, this area would have been subsequently modified via sedimentation from fluvial and marine sources, forming tidal channels, mangrove swamps, tidal flats, and estuaries [ 48 ]. At 4 km in length and c. 500 m wide, the mean depth of the Kilifi Creek channel is 12–15 m below mean sea level (MSL), ranging from 35–38 m at the mouth, gradually increasing over the length of the channel to c.8-9 m where it enters the lagoon [ 49 – 51 ]. The Kilifi Creek Lagoon basin itself is comparatively shallow, with a mean depth of 5–7 m, and depths of several sampling points away from the channel ranging from c. 1.6–3.8 m [ 50 ].…”

Section: Site Location and Descriptionmentioning

confidence: 99%

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67,000 years of coastal engagement at Panga ya Saidi, eastern Africa

et al. 2021

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The antiquity and nature of coastal resource procurement is central to understanding human evolution and adaptations to complex environments. It has become increasingly apparent in global archaeological studies that the timing, characteristics, and trajectories of coastal resource use are highly variable. Within Africa, discussions of these issues have largely been based on the archaeological record from the south and northeast of the continent, with little evidence from eastern coastal areas leaving significant spatial and temporal gaps in our knowledge. Here, we present data from Panga ya Saidi, a limestone cave complex located 15 km from the modern Kenyan coast, which represents the first long-term sequence of coastal engagement from eastern Africa. Rather than attempting to distinguish between coastal resource use and coastal adaptations, we focus on coastal engagement as a means of characterising human relationships with marine environments and resources from this inland location. We use aquatic mollusc data spanning the past 67,000 years to document shifts in the acquisition, transportation, and discard of these materials, to better understand long-term trends in coastal engagement. Our results show pulses of coastal engagement beginning with low-intensity symbolism, and culminating in the consistent low-level transport of marine and freshwater food resources, emphasising a diverse relationship through time. Panga ya Saidi has the oldest stratified evidence of marine engagement in eastern Africa, and is the only site in Africa which documents coastal resources from the Late Pleistocene through the Holocene, highlighting the potential archaeological importance of peri-coastal sites to debates about marine resource relationships.

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Section: Discussionmentioning

confidence: 99%

Section: Site Location and Descriptionmentioning

confidence: 99%

67,000 years of coastal engagement at Panga ya Saidi, eastern Africa

et al. 2021

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“…Along the coastal waters of Kenya, several studies have been conducted on shrimps and prawns, including studies on distribution of some deep water prawn and lobster species in Kenya's waters [7], stock assessment and population dynamics of penaeid prawns and managing the prawn fishery in Kenya [8], resource use conflicts especially in the Malindi-Ungwana Bay [9], impact of the shrimp trawling in Ungwana Bay on marine resources [10], preliminary investigations on the ichthyo-diversity of the Kilifi creek, Kenya [11] and more recently, analysis of the fish species composition and distribution in Kilifi creek [12]. However, in most of the coastal waters and embayments in Kenya, including the Kilifi creek, detailed studies on the biology of the Indian prawn P. indicus as well as other penaeid shrimps are evidently lacking.…”

Section: Open Access Freely Available Onlinementioning

confidence: 99%

Ovarian Development of the Penaeid Shrimp Penaeus indicus (Decapoda): A Case for the Indian Ocean Coastal Waters of Kilifi Creek, Kenya

Henry¹,

Mul²,

Njiru³

2019

Fish Aquac J

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The Indian prawn Penaeus indicus, is one of the major commercial shrimp species globally. It is widely distributed in the Indo-West Pacific; from eastern and southeastern Africa, through India, Malaysia and Indonesia to southern China and northern Australia. The species has been recorded to reach 22 cm, inhabiting depths of 100 m. Globally P. indicus is widely studied, although majority of the studies have focused on developmental stages between shallow waters and the deep seas. Studies indicate that development takes place in the sea before the larvae move into estuaries to grow, then return as sub-adults. However, studies on the maturity of this species in shallow waters and especially creeks and embayments are clearly lacking for the Kenyan coastline. This study was conducted in the Kilifi Creek, north coast Kenya, from the mouth at the Kilifi Bridge to past Kibokoni, some 5 km into the creek. Samples were collected from 6 landing sites. Morphometric and biological data including total length (TL, cm), carapace length (CL, cm), body weight (BW, g) and sex were recorded, and the specimens dissected to check for ovarian development and maturity. Ovarian development stages were determined from size, shape and colour of the ovaries, and through frequency analysis of the cortical granules. A total of 1,149 specimens were sampled from January to April, 2018. The catch mostly comprised of the 1.5 cm to 2.5 cm CL size class. However some individuals in the >4.0 cm CL size class were also recorded suggesting that some individuals still matured in the creeks although majority are known to migrate deep sea. Regression analysis showed a strong positive correlation between CL, and TL (r 2 =0.7548) and BW (r 2 =0.7497).The condition factor ranged from 0.19-0.94 indicating presence of both immature/spent (4.7%) and ripe individuals (95.3%) in good condition. Size frequency analysis of the ovary cortical granules displayed a poly-modal pattern with 2 peaks of immaturity and 3 peaks for developing and near-ripe respectively. The presence of spent stages as well as mature specimens in the creek waters indicated that apart from using these habitats as nursery and feeding grounds, some of the individuals might also be growing, maturing and spawning in the creek, calling for further studies into the assessment of the growth patterns and reproductive aspects of this species in the Kilifi Creek and other coastal waters.

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Preliminary investigations on the Ichthyodiversity of Kilifi Creek, Kenya

Cited by 2 publications

References 9 publications

67,000 years of coastal engagement at Panga ya Saidi, eastern Africa

67,000 years of coastal engagement at Panga ya Saidi, eastern Africa

Ovarian Development of the Penaeid Shrimp Penaeus indicus (Decapoda): A Case for the Indian Ocean Coastal Waters of Kilifi Creek, Kenya

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