Effect of water temperature and diet on growth and mortality ofNeptunea arthriticajuveniles

Abstract

The growth and mortality of Neptunea arthritica juveniles hatched from di¡erent egg masses (controlled conditions and ¢eld) reared at 10 and 15 1C, and provided with sardine (D1) and polychaete (D2) as foods were evaluated. Results showed that diet type and water temperature signi¢cantly a¡ect the growth and mortality. Interaction between these factors re-£ected robust relationship among them, but restricted exclusively to growth. Through the study period, juveniles treated at 10 1C showed maximum increments of 2.5 mm (shell length), 2.3 mm (shell width) and 0.25 g (body weight) from their initial size.While maximum values of those treated at 15 1C for the above-mentioned parameters were 7.6 mm, 5.5 mm and 1g respectively. In both cases, these increments were recorded for individuals fed with sardine. Mortality was signi¢cantly a¡ected by diets and water temperature, which signi¢cantly increased under D2 [10 1C (20^67%), 15 1C (70^87%)] or 15 1C [D1 (30^83%), D2 (70^87%)]. According to the results, juveniles of N. arthritica could be maintained under controlled conditions, which allows growth improvement. Mortality appears to be the limiting factor, but this could be improved by the implementation of e⁄cient culture method, basically oriented to increase the water quality. Aquaculture Research, 2009, 40, 428^436 E¡ect of water temperature and diet R M Miranda et al. E¡ect of water temperature and diet R M Miranda et al. E¡ect of water temperature and diet R M Miranda et al. r 2008 The Authors Journal Compilation r 2008 Blackwell Publishing Ltd, Aquaculture Research, 40, 428^436 E¡ect of water temperature and diet R M Miranda et al.

Hatching, Growth and Feed Preference of Hatchlings of<i> Volagalea cochlidium</i> (Linnaeus, 1758)

“…Hatchlings of H ternatanus, in a 10-week experiment exhibited preference for clam (Morton, 1987;Guterrres and Gallando, 1999;Pehardo and Morton, 2006;He and Yang, 2005;Weng and Sun, 2007;Tang et al, 2012). Similar reports in other whelk species are by Woodcock and Ben Kendorff, 2008;Miranda et al, 2009). …”

“…Higher mortality has been reported in H ternatanus and N arthritica also (Miranda et al, 2009;Tang et al, 2012). However in Babylonia spirata, higher preference for fish (carangid fish) to green mussel has been reported (Kritsanapuntu, et al, 2007).…”

Effect of water temperature on the behavior of Neptunea cumingii and the histology, immune enzyme activity, and transcriptome of its gills and kidneys

“…The highest average food intake was 16 gram per individual, which was consistent with the normal food intake of N. cumingii . (Fujinaga et al, 1999; Miranda et al, 2008). Other studies have shown that an initial increase followed by a decrease in food intake as temperature increases is a common phenomenon in aquatic animals (Sun et al, 1982; Xie et al, 1992).…”

Προσδιορισμός των βιολογικών απαιτήσεων του τρίτωνα Charonia seguenzae (Aradas and Benoit, 1870) προκειμένου να επιτευχθεί η συντήρηση υπό συνθήκες ευζωίας ενηλίκων ατόμων και η αναπαραγωγή

“…Barnes & Barnes, 1975, Dawirs & Dietrich, 1986, Aranda et al, 1989, Bernardi, 1990, Pechenic et al, 1990, Delrioportilla et al, 1992 ηελ αχμεζε (π.ρ. Davis & Calabrese, 1969, Almada-Villela et al, 1982, Beaumont & Budd, 1982, Laughlin, 1983, Cadman & Weinstein, 1988, Forsythe & Hanlon, 1988, Aranda et al, 1989, Britz et al, 1997, Garcia-Esquevel et al, 2007, Miranda et al, 2009, Green et al, 2011, Noble et al, 2013 ηελ αλαπαξαγσγή θαη θπιεηηθή δηαθνξνπνίεζε ησλ ζαιάζζησλ νξγαληζκψλ (π.ρ. Thorson, 1950, Ginsburger-Vogel, 1975, McMahon, 1975, Heip & Smol, 1976, Aiken & Waddy, 1989, Morse, 1981, Abdullahi, 1990, Browne & Wanigasekere, 2000, Halsband-Lenk et al, 2002 (Poulos et al, 1997, Shaltout & Omstedt, 2014 (Stickle et al, 1985, Britz et al, 1997, Foster & Hodgson, 1998, Garcia-Esquivel et al, 2007.…”