Comportamento alimentar do camarão de agua doce, Macrobrachium rosenbergii (De Man) (Crustacea, Palaemonidae) durante a fase larval: análise qualitativa

Abstract

ABSTRACT. FEEDING BEHAVIOR OF THE PRAWN, MA CROBRACHIUM ROSENBERGII (DE MAN) (CRUSTACEA, PALAEMONIDAE), DURING THE LARVAL PHA SE: QUALlTATlVE ANALYSIS. Feeding behavior 01' the larvae's prawn, Macrobrachium rosenbergii De Man, 1879, in each stage ofdevelopment was studied face at Arlemia Linnaeus, 1758 nauplii, dry and wet diets. Groups of ten larvae in each stage were placed in 500 mI beakers at 29°C in filtered brackish water. AfieI' the fasting period ofacclimatization, the three types 01' food were offered separately to the larvae and the feeding behavior was observed during 30 min o Feeding perception, capture, grasp and ingestion offood were used to detetmine feeding pattern. Stage Ilarvae do not eal. The feeding behavior of larvae was similar on the stages TI -Xl. The perception in distance does not occur in most individuaIs; the feeding process generally started with the physical contact of food with the animal. Food is captured by thoracic appendages (maxillipeds until stage IIl, and maxillipeds + percopods in stagcs IV -XI) and particles are grasped and handled by maxillipeds. ln opposition at the capture, the ingestion is a seletive processo Selective responses decrease in later stages and larvae become omnivorous in greater degree. KEY WORS. Macrabrachium rosenbergii, larvae, feeding behavior Macrobrachillm rosenbergii (De Man, 1879) destaca-se como a espécie de camarão de água doce mais adequada para cultivo devido às suas características biológicas, tais como fácil reprodução em cativeiro, alta fecundidade, rápida taxa de crescimento, rusticidade e resistência a doenças (SICK & BEA TY 1974; COELHO et aI. 1981; VALENTl 1985). Além disso, sua tecnologia de cultivo é bem conhecida.A alimentação é um dos fatores mais importantes que afetam o desenvolvimento larval de crustáceos decápodes e o sucesso do cultivo comercial de larvas desses animais depende da utilização eficiente e econômicade alimentos disponíveis (YUFERA et aI. 1984;FREEMAN 1990). De um modo geral, em todo mundo, a alimentação das larvas de M. rosenbergii é baseada no fornecimento de náuplios

Intake of different food sources in the first zoeae stages of Macrobrachium tenellum (Decapoda: Palaemonidae)

“…In the present study, the zoea I stage did not consume food, regardless of the treatment. This feeding behavior has been mentioned by other authors who reported that the zoea I of M. rosenbergii and M. amazonicum are lecithotrophic and survive on yolk reserves during the first days (Barros & Valenti, 1997;Araujo & Valenti, 2007). The zoea I of M. tenellum was found to have some lipid reserves in the cephalothoracic region that allows it to grow into the next stage without exogenous feeding (Fig.…”

Evaluation of the feeding habits of Macrobrachium brasiliense (Heller, 1862) in the Curral de Arame stream (Dourados/Mato Grosso Do Sul, Brazil)

“…Studies involving the feeding of freshwater shrimps in their natural environment are uncommon due to the difficulty in determining and quantifying the stomach content, but some authors have significantly contributed to the knowledge of the subject (Chong and Sasekumar, 1981;Barros and Valenti, 1997;Albertoni et al, 2003;Jimoh et al, 2011). There is no information available on the natural diet of Macrobrachium brasiliense in Brazilian streams.…”

Ontogenetic Development of Sensory Structures on the Antennules and Antennae of the Giant River PrawnMacrobrachium rosenbergii(De Man)

“…Meyers and Zein-Eldin (1972) discovered that carideans have a strong preference for more odoriferous foods, because diffusion of certain substances in the water stimulated individuals to approach. Barros and Valenti (1997) observed some larvae of M. rosenbergii swim actively toward food, mainly during the final zoeal stages (VII-XI). Therefore, there can be a presumption that the aesthetascs and plumose setae of the antennules have an olfactory chemoreception function in M. rosenbergii.…”