Effect of delayed first feeding on development and feeding ability ofParalabrax maculatofasciatuslarvae

Abstract

The impact of delayed feeding early in development on late feeding ability and development of spotted sand bass Paralabrax maculatofasciatus larvae was examined. Larvae were sampled from hatching until day 19 after delayed feeding for zero (control), 1, 2, or 3 days. Feeding incidence was evaluated as the percentage of larvae with food in the gut and feeding intensity was measured by direct counting of prey after dissection of the gut. Delayed feeding effects due to starvation were observed early in development. By day 5, significant differences (P < 0Á05) were observed between controls and larvae submitted to degrees of delayed feeding, including total length (L T ), eye diameter, and the size of the head, liver, gut, muscles and body. Differences were still apparent in L T , and body, liver and muscle heights at the end of the studied period. Larvae under total starvation did not survive beyond day 5. Initial feeding incidence was 35, 60, 90 and 10% for larvae first fed on day 2, 3, 4 or 5, respectively. Mean AE S.D. feeding intensity was 3Á6 AE 0Á8, 2Á8 AE 1Á3, 5Á2 AE 0Á3, and 10Á2 AE 1Á5 rotifers per larva depending on whether larvae were initially fed on day 2, 3, 4 or 5, respectively. The point of no return occurred between 4 and 5 days after hatching. # 2005 The Fisheries Society of the British Isles

Development and allometric growth patterns during early larval stages of the spotted sand bass <i>Paralabrax maculatofasciatus</i> (Percoidei: Serranidae)

“…Peck and D. Schnack (eds. ) ment and year-class strength in wild populations (Bailey and Houde, 1989) and seed quality under culture conditions (Peña and Dumas, 2005).…”

Effects of delayed first feeding on growth of the silver catfish larvae Rhamdia voulezi (Siluriformes: Heptapteridae)

“…For example, for the freshwater species, Odontesthes bonariensis (Valenciennes, 1835), the PNR occurred on the eighth day after hatching at 26ºC (Strussmann, Takashima, 1989). However, for the marine species, Paralichthys californicus, the PNR occurred on the 7 th DAH at 18ºC (Gisbert et al, 2004) and for Paralabrax maculatofasciatus, it occurred on the fourth or fifth day after hatching (in approximately 24°C) (Peña, Dumas, 2005). For Neotropical fishes there is no information regarding the PNR.…”

“…Several methods have been used to describe the effects of food deprivation in adult and larval fish: morphometric and gravimetric measurements (weight) (Peña, Dumas, 2005;Shan et al, 2009;Faria et al, 2011), RNA/DNA content (Faria et al, 2011), histological criteria (Gisbert et al, 2004), enzyme activity (Chen et al, 2007), and swimming ability (Faria et al, 2011). Available research on these issues at present is still scarce and especially targeted at fish larvae of marine species, such as Paralichthys californicus (Ayres, 1859) (Gisbert et al, 2004), Paralabrax maculatofasciatus (Steindachner, 1868) (Penã, Dumas, 2005), Seriola lalandi Valenciennes, 1833 (Chen et al, 2007), Oplegnathus fasciatus (Temminck, Schlegel, 1844) (Shan et al, 2008), and Miichthys miiuy (Basilewsky, 1855) (Shan et al, 2009).…”

“…Understanding how starvation may affect the development, growth, and survival of the larvae is crucial to determine the time frame that fishes can tolerate the absence of food before reaching the point-of-no-return (Gisbert et al, 2004;Peña, Dumas, 2005), and may be a useful tool to understand the causes of early mortality of fishes in their natural environment (O'Connell, 1976), as well as in rearing conditions. This study investigates the effects of delayed first feeding on biological parameters in silver catfish larvae, Rhamdia voulezi Haseman, 1911, an endemic species from Iguaçu River Basin in South America, in order to better understand its larval growth during starvation and provide information for feeding management in larval rearing.…”

First feeding and subsequent growth performances in piscivorous larvae of Chinese perch Siniperca chuatsi (Perciforms: Sinipercidae)

“…The success of first feeding is influenced by many factors, such as ontogeny and prey availability. For example, the feeding incidence of sand bass Paralabrax maculalofasciatits changes with ontogeny and prey availability (Pena and Dumas 2005). Besides maturation, learning also plays an important role in the development of foraging behavior (Coughlin 1991;Cox and Pankhurst 2000;Gibbons et al 2005;Wittenrich et al 2009;Nunn et al 2012).…”