Air waves effect on sea bed logging for shallow water application

Author(s):  
Hanita Daud ◽  
Noorhana Yahya ◽  
Vijanth Asirvadam ◽  
Khairul Ihsan Talib
1989 ◽  
Vol 94 (C6) ◽  
pp. 8111 ◽  
Author(s):  
Luigi Cavaleri ◽  
Luciana Bertotti ◽  
Piero Lionello

Author(s):  
R.N. Gibson ◽  
L. Robb

Eight individuals of Mullus surmuletus (Teleostei: Mullidae) ≤80 mm total length were captured in shallow water in the Firth of Lorn, western Scotland in August and September 1995. The species is rare on the west coast of Scotland and the occurrence of juveniles is a new record for the area.The red mullet (Mullus surmuletus L.) is a species whose distribution is centred on the Mediterranean where it forms the basis of a commercial fishery (e.g. Renoñes et al., 1995). Outside the Mediterranean it is found on eastern Atlantic coasts from the Canaries northwards to the English Channel and the southern North Sea where it is ‘moderately common’ (Wheeler, 1969). Further north it is regarded as rare (Wheeler, 1969; Hureau, 1986) and the northern limit is variously given as Scotland (Lythgoe & Lythgoe, 1992) or southern Norway (Wheeler, 1978). Most northern records are from the North Sea (Rae & Wilson, 1954; Rae & Lamont, 1964), presumably reflecting the intensive fishing effort in this area. Records to the west of the British Isles are few and have been summarized by Gordon (1981) and subsequently by Henderson (1986, personal communication), including one from the Faeroes (Blacker, 1977). All recorded occurrences in western Scotland are of adult fish (26–31 cm) caught by commercial fishing vessels and juveniles have never been reported from this area. This note documents (Table 1) the capture of small individuals (N=8) in shallow water off the west coast of Scotland in an area where they had never been recorded previously, despite intensive studies of the local fish fauna since 1970 (R.N.G., personal observation; Gibson, 1973; Gibson et al., 1993). The eight fish were caught on Tralee beach, Ardmucknish Bay, Firth of Lorn, Argyll (56°31′N 5°29′W). The sea bed in this area consists of fine sand (Gibson et al., 1993). It is possible that their occurrence is linked with the unusually warm summer of 1995 allowing juveniles to penetrate further north than usual. Water temperatures at 2–5 m on 29 August, 1995 were 14.3°C compared with a maximum of 13.6°C recorded over the period 1986–1989 (Gibson et al., 1993).


The Festivus ◽  
2019 ◽  
Vol 51 (1) ◽  
pp. 43-50
Author(s):  
John Daughenbaugh

The oldest recorded fossil Cypraeidae from southern Florida date from the late Zanclean-early Piacenzian Pliocene (circa 3.8-3.6 million years ago - hereinafter “mya”) in the Myakka Lagoon System, a shallow water estuary that lies beneath the present day Sarasota area. Shallow water sea grass beds and nascent shoreline mangrove forests hosted seven Cypraeidae species in five genera. Determining the origins of these species is challenging as only steinkern casts have been found in adjacent lower layers. However, enough features are present in two of the casts to infer the ancestral presence of two of the genera. For the other genera and species, a comparison of features with the northern Florida Panhandle Cypraeidae populations dating from the Burgdigalian Miocene (16-20 mya) does suggest certain affinities. However, no direct lineage can be asserted with any confidence. The sea bed deposit layer of this period has been designated the Buckingham Member of the Tamiami Formation of southern Florida.


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